• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Real-time monitoring methods and systems of wind turbine winding isolation status. They comprise the steps of: a) capturing in real time, during a predetermined time period (both in situations in which the generator is synchronized to the electricity grid but not yet coupled to it, or in situations in which the generator is producing energy) the values of one or more electrical and vibration variables of the generator; b) obtain in real time the temporal evolution of the vibration and the inverse components of the electrical variables at one or more predetermined frequencies; c) identifying a possible failure of the generator insulation when the inverse component of the at least one electrical variable and/or a vibration at one of said predetermined frequencies exceeds an absolute threshold or a pre-established temporary increase threshold. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2613902A1
    申请号:ES201500845
    申请日:2015-11-26
    公开日:2017-05-26
    发明作者:José Luis RODRIGUEZ IZAL；Isaac GUDE RODRIGUEZ；Guillermo SANCHEZ VITORICA；Almudena MUÑOZ BABIANO
    申请人:Gamesa Innovation and Technology SL；
    IPC主号:
    专利说明:


    For example, 50MVA and higher, while a wind farm of the same power can be made up of several wind turbines with generators of power lower than 10MV A. Thus, to detect generator insulation failures in a wind farm, it would be necessary to install in each one of the generators the
    5 corresponding fault detection system, significantly increasing the cost of the system.
    In other words, those methods that require the use of specific equipment to monitor the status of each generator in a planned manner throughout its useful life are not profitable in the industry
    10 wind. Methods and systems specifically oriented to the detection of insulation faults of wind generators where it is not necessary to incorporate additional elements for such work, as well as the integration of these systems to the wind systems, would therefore be desirable for the wind industry.
    15 existing wind turbines so that their cost is not increased. The present invention is oriented to the attention of these demands. SUMMARY OF THE INVENTION
    In one aspect, the invention provides a method of detecting failures in the isolation of a generator of a wind turbine coupled to an electrical network through a converter and provided with means of measuring electrical variables of the generator (voltage and current in the rotor and stator) well
    25 as of its radial-horizontal and radial-vertical vibrations on the side of the coupling and / or on the side opposite it. The method comprises the following steps: a) capture in real time, during a predetermined time period (both in situations where the generator is synchronized to the mains but not yet coupled to the
    30 same as in situations where the generator is producing energy) the values of one or more electric variables of the generator and / or of the radial-horizontal and radial-vertical vibrations of the generator in at least one of
    the two sides of the coupling; b) obtain in real time the temporal evolution
    of the inverse components of said electrical variables to one or more
    predetermined frequencies and / or the temporal evolution of the values of said
    vibrations at one or more predetermined frequencies; c) identify a possible
    5 generator insulation failure when the inverse component of at least
    an electric variable and / or one of said vibrations at one of said frequencies
    default exceeds an absolute threshold or an increase threshold
    Temporary presets.
    Method embodiments for different types of generator are contemplated
    10 (doubly fed, permanent magnets and squirrel cage) in the
    network coupling situations mentioned and are detailed for each case
    the relevant variables and the predetermined frequencies for each of
    they.
    In another aspect, the invention provides a system for implementing the
    fifteen mentioned method comprising a computer system connected to the bus of
    wind turbine data to capture electrical variable measurements
    (which can be provided by the converter or by a separate device
    of the same) and of the vibration variables that are provided by a
    measuring device connected to a set of sensors arranged on the
    2 o generator.
    Other features and advantages of the present invention will be apparent.
    of the detailed description that follows in relation to the figures that are
    accompany.
    25 BRIEF DESCRIPTION OF THE FIGURES
    Figure 1 represents a Fast Fourier Transform containing
    the inverse (or negative) and direct (or positive) sequence of the stator voltage
    of a doubly fed wind generator illustrating with a rhombus the
    30 failure cases and circle the cases without failure.
    Figure 2a is a diagram showing the temporal evolution of the
    reverse component of the stator voltage at -50Hz of a wind generator
    doubly fed and Figure 2b is the same diagram indicating the threshold
    absolute and the time increment threshold used as indicators of
    failure.
    Figure 3 is a diagram comparatively showing the
    5 vibration components of a doubly powered wind generator
    illustrating with a rhombus the cases of failure and with a circle the cases without failure.
    Figure 4 is a schematic diagram of the detection system of
    failures in the isolation of a wind generator according to the invention.
    Figures 5 and 6 are schematic diagrams of two embodiments of the
    10 fault detection system in the isolation of a wind generator of
    permanent magnets according to the invention.
    Figure 7 illustrates the position of radial-vertical vibration sensors and
    radial-horizontal arranged in a wind generator on the coupling side
    (through which the generator shaft comes out) and on the opposite side of the coupling.
    fifteen
    Detailed description of the invention
    The present invention provides methods and systems for detecting the
    winding insulation status of a wind turbine generator
    2 o by online monitoring of, on the one hand, electrical variables and of, for
    on the other hand, its vibration, thereby allowing the work of
    preventive maintenance to avoid catastrophic failures in the insulation of the
    generator.
    It has been found in that sense that an insulation defect in the
    25 generator produces an imbalance in its voltages and currents in the rotor and in
    the stator resulting in an increase in the inverse component of those
    variables particularly at certain frequencies.
    Thus, for example, analyzing the direct and inverse sequence of the voltage
    from the stator of a doubly powered generator (see Figure 1) you can
    30 appreciate that a fault appears when the inverse component of the voltage of the
    Stator at -50Hz reaches a certain value.
    The monitoring of the electrical variables proposed by the invention
    It involves three steps:
    -Capture in real time, for a predetermined time period,
    measurements of the values of one or more electric variables of the generator
    5 (which, as we will see later, can be done in the converter
    by which the generator is coupled to the mains or in a device
    separated from it).
    -Get in real time, from the voltage measurements and / or the
    current in the rotor and / or in the stator, the temporal evolution of the components
    10 inverses of one or more electrical variables at one or more frequencies
    predetermined in which it is considered that there may be a failure in the
    generator. Following the assumption represented in Figure 1, once
    has identified that a doubly powered generator fails
    in the inverse component of the stator voltage at -50Hz you have to get the
    fifteen temporal evolution of that variable in order to monitor the severity of the
    hurt. Thus, as shown in Figure 2a, the value of the inverse component
    of the stator voltage at -50Hz increases over time depending on the
    short circuit severity.
    -Identify a possible generator insulation failure when the
    2 o inverse component of at least one electrical variable to a given
    frequency exceeds an absolute threshold or a temporary increase threshold
    preset Following the example of Figure 2a and as illustrated in the
    Figure 2b would identify this possibility of failure when:
    a) The absolute threshold Ua of the inverse component of the voltage of the
    25 Stator reaches the value of 10v.
    b) The temporary increase threshold Uit reaches a certain value.
    This value would take place when the inverse component of the stator voltage
    it reaches the value of 5v since in the interval 2.5-5v the derivative of the function
    which represents the temporal evolution of the inverse component of the voltage of the
    30 Stator reaches high values.
    It has also been found that a current imbalance caused
    due to a fault in the insulation it produces an electromagnetic imbalance that
    It will result in generator vibration at a certain frequency. So by
    example, analyzing the evolution of the vibration of a generator twice
    powered by 11 kW it is observed (see Figure 3) that there is an increase in
    vibration at 100Hz and 200Hz (2 and 4 times the frequency of a power grid of
    5 50Hz) when there is an incipient short in the stator.
    The vibration monitoring proposed by the invention involves three
    Similar steps to the electric variables:
    -Capture in real time, for a predetermined time period,
    measurements of horizontal radial vibration and vertical radial vibration
    10 of the generator on the side of the mains connection and on the opposite side
    to it (which, as we will see later, are carried out by means of
    vibration measurement incorporated into the generator). Means of that kind are
    described in EP 1 531 37681.
    -Get real-time, from these measurements, the evolution
    fifteen temporal vibration mentioned at one or more frequencies
    predetermined in which it is considered that there may be a failure in the
    generator.
    -Identify a possible generator insulation failure when
    less one of these vibrations at a certain frequency exceeds a
    2O absolute threshold or a preset time increment threshold.
    Once a possible insulation failure has been identified because one of the
    the electrical or vibration variables mentioned above exceed some
    of the mentioned thresholds the appropriate corrective measures would be activated.
    The mentioned monitoring will be carried out both in temporary periods
    25 corresponding to low wind situations in which the generator is
    synchronized to the power grid but not coupled to it as in
    periods of energy production.
    In the first case, the objective is to verify the correct state of the
    insulation before coupling it to the mains. This avoids coupling
    30 the generator to the power grid in case of significant loss of insulation and to
    In turn, damage to the generator is minimized in case of
    candid short. In addition, damage or fatigue in other components will be avoided by
    avoid high currents or pairs of short circuits especially in
    doubly fed generators. Checking the status of
    Insulation in the low wind phase is more effective since both events
    transients produced in the electricity grid as unexpected gusts of wind,
    5 may cause erroneous measures. In this mode, insulation failures
    they can be detected in more incipient states, due to the lack of
    transient events, the detection system can be further refined.
    In the second case, the objective is to detect insulation losses in
    operation. In that case you can stop the generator and check the status of the
    10 Isolation in the previous mode.
    Following Figure 4 it can be seen that the monitoring mentioned in
    a generator 11 of a wind turbine connected to a power grid 15 through
    of a converter 13 is performed on an external computer system 21 connected
    to the data bus 17 of the wind turbine to which your system is also connected
    fifteen of control 19.
    The data bus 17 receives in real time a data stream D1 of the
    measurements of the mentioned electrical variables made in the converter
    13 thanks to the measurement means available in it and a data flow
    D2 of the mentioned vibration measurements.
    2 o As illustrated in more detail in Figure 5 the data flow D2 of
    Vibration measurements are generated in a vibration measurement device
    14 connected to a set of sensors 12 arranged on the generator 11.
    That set can comprise (see Figure 7) sensors in positions
    indicated by arrows F1 and F3 to measure radial-vertical vibration and by
    25 arrows F2 and F4 to measure radial-horizontal vibration in, respectively, the
    side of the coupling and the side opposite the coupling of the generator 11.
    For its part, and as illustrated in Figure 6, data flow D1 can
    be generated in a measuring device 16 separated from the converter 13 and provided
    of means for measuring the electric variables of the generator 11.
    30 From the data streams D1 and D2, the computer system software
    21 would obtain in real time the temporal evolution of the inverse components
    of the electrical variables and the vibrations mentioned at the frequencies
    indicated. In addition, by analyzing the temporal evolution, it would identify a possible failure of the generator insulation 11 when the value of the inverse component of an electric variable and / or the value of one of the mentioned vibrations of the generator 11 exceeds any of the thresholds
    5 preset. Finally, it would execute the appropriate alarm and warning measures so that when a possible insulation fault is detected, the appropriate corrective measures are taken.
    The computer system 21 can be used to monitor the generator isolation status of several wind turbines by accessing their data buses 10.
    The system of the invention is thus applicable to wind turbines that have means to provide in real time to a computer system 21 the values of the mentioned variables.
    The specific variables to be monitored, which depend on the type of generator and the time period in which the monitoring is carried out,
    They comprise one or more of the following. A) Double-powered generators a1) The inverse component of the stator voltage at one or more of the
    following frequencies: frequency of the power grid, an integer multiple of the inverse component of the frequency of the power grid, an integer multiple of the direct component of the frequency of the power grid.
    a2) The inverse component of the stator current at one or more of the following frequencies: power grid frequency; an integer multiple of the inverse component of the grid frequency; an integer multiple of the
    25 direct component of the grid frequency (only when the generator is coupled to the grid).
    a3) The inverse component of the rotor voltage at one or more of the following frequencies at a certain speed (a speed must be chosen to process measurements at that speed since the fundamental frequency of the rotor varies with its rotational speed): fundamental rotor frequency; an integer multiple of the inverse component of the fundamental frequency
    of the rotor; an integer multiple of the direct frequency component
    fundamental rotor.
    a4) The inverse component of the rotor current at one or more of the
    following frequencies at a certain speed (one must choose
    5 speed to process measurements at that speed since the frequency
    fundamental of the rotor varies with its speed of rotation): fundamental frequency of the
    rotor; an integer multiple of the inverse component of the fundamental frequency
    of the rotor; an integer multiple of the inverse component of the network frequency
    electric; an integer multiple of the direct component of the network frequency
    10 electric; frequencies defined by the formula ± nlsw ± mlrotor, where n and m are
    integers, fsw the frequency of switching of the converter and frotor the
    fundamental frequency of the rotor.
    a5) The vibrations mentioned to one or more of the following
    frequencies: frequencies multiple of the frequency of the power grid;
    fifteen frequencies defined by the formula I network [± l + ±! Q (l-S)], Ired being the
    fundamental frequency of the mains, 9 an integer, Q the number of
    stator or rotor grooves (two calculations must then be made: one for the
    stator and another for the rotor), p the number of pairs of poles and s the slip
    of the generator (as the generator slip varies with the speed of
    2 o turn a speed must be chosen to process measurements at that speed).
    B) Permanent magnet generators
    b1) The inverse component of the stator voltage at one or more of the
    following frequencies: stator fundamental frequency; an integer multiple of
    the inverse component of the fundamental frequency of the stator; a multiple
    25 integer of the direct component of the fundamental frequency of the stator.
    b2) The inverse component of the stator current at one or more of the
    following frequencies: fundamental frequency of the state; an integer multiple of
    the inverse component of the fundamental frequency of the stator; a multiple
    integer of the direct component of the fundamental frequency of the stator;
    30 frequencies defined by the formula ± nlsw ± mlestator, with n and m numbers
    integers, fsw the converter switching frequency and festator the frequency
    Stator fundamental.
    b3) The vibrations mentioned to one or more of the following
    frequencies: frequencies multiple of the frequency of the power grid; frequencies
    defined by the formula festator [± 1 + ±; Q], with festator being the frequency
    Stator fundamental, 9 an integer, Q the number of stator slots
    5 and P the number of pairs of poles.
    In the event that the permanent magnet generator is
    synchronized to the power grid but not coupled to it will only be taken in
    consideration for the calculation of the values of the electrical variables and of
    vibration at the same speed of rotation (ie the analysis will be performed at
    1 0 isovelocity). In this case, the generator does not inject active power into the network.
    electric but the generator is operated with pure reactive power.
    When the generator is coupled to the mains, they will only be taken in
    consideration for the calculation of the values of the electrical variables and of
    vibration at the same speed of rotation and at the same power (i.e.
    fifteen analysis will be done at isovelocity and isopotence).
    C) Squirrel Cage Generators
    c1) The inverse component of the stator voltage at one or more of the
    following frequencies: stator fundamental frequency; an integer multiple of
    the inverse component of the fundamental frequency of the stator; a multiple
    2 o integer of the direct component of the fundamental frequency of the stator.
    c2) The inverse component of the stator current at one or more of the
    following frequencies: stator fundamental frequency; an integer multiple of
    the inverse component of the fundamental frequency of the stator; a multiple
    integer of the direct component of the fundamental frequency of the stator;
    25 frequencies defined by the formula ± nfsw ± mfestatoro being n and m numbers
    integers, fsw the converter switching frequency and festator the frequency
    Stator fundamental.
    c3) The vibrations mentioned to one or more of the following
    frequencies: frequencies multiple of the frequency of the power grid; frequencies
    30 defined by the formula festator [± 1 + ±; Q (1-s)], with festator being the frequency
    Stator fundamental, 9 an integer, Q the number of stator slots
    or of the rotor (two calculations must then be made: one for the stator and one for the rotor), p the number of pairs of poles and s the generator slip. In the event that the squirrel cage generator is synchronized to the mains but not coupled to it, they will only be considered.
    5 for the calculation of the values of the electric and vibration variables at the same speed of rotation (that is, the analysis will be carried out at iso speed). In this case, the generator does not inject active power into the power grid, but the generator is operated with pure reactive power.
    When the generator is coupled to the mains, they will only be taken in
    10 consideration for the calculation of the values of the electric and vibration variables at the same speed of rotation and at the same power (that is, the analysis will be done at isovelocity and isopotence). Although the present invention has been described in relation to various embodiments, it will be appreciated from the description that can be made
    Various combinations of elements, variations or improvements therein, and are within the scope of the invention as defined in the appended claims.
    权利要求:
    Claims (20)
    [1]

    1. Method of detecting faults in the generator isolation of a
    wind turbine coupled to a power grid through a converter, being
    5 the wind turbine provided with means of measurement of the electrical variables of the
    generator as well as its radial-horizontal and radial-vertical vibrations in the
    side of the coupling and / or on the side opposite it, characterized in that
    It comprises the following steps:
    -capture in real time, for a predetermined time period,
    10 the values of one or more electric variables of the generator and / or of the
    radial-horizontal and / or radial-vertical generator vibrations in at least one
    of the two mentioned sides provided by said measuring means;
    - obtain in real time, the temporal evolution of the components
    inverses of said electrical variables at one or more frequencies
    fifteen predetermined and / or the temporal evolution of the values of said vibrations
    at one or more predetermined frequencies;
    -identify a possible generator insulation failure when the
    inverse component of at least one electric variable and / or one of said
    vibrations at one of said predetermined frequencies exceeds a threshold
    2 o absolute or a preset time increment threshold.
    [2]
    2. Method according to claim 1, wherein:
    -the generator is a doubly fed generator;
    -the temporary period in which said capture of values is made is a
    25 period in which the generator is synchronized to the power grid but not yet
    is coupled to it;
    -the real time evolution of one or more of the
    following variables:
    a) the inverse component of the stator voltage at one or more of the
    30 following frequencies: power grid frequency; an integer multiple of the
    reverse component of the frequency of the power grid; an integer multiple of the
    direct component of the power grid frequency;
    b) the inverse component of the rotor voltage at one or more of the
    following frequencies at a certain speed: fundamental rotor frequency; an integer multiple of the inverse component of the fundamental frequency of the rotor; an integer multiple of the direct frequency component
    5 fundamental rotor;
    c) the inverse component of the rotor current at one or more of the following frequencies: fundamental frequency of the rotor at a certain speed; an integer multiple of the inverse component of the fundamental frequency of the rotor at a given speed; an integer multiple of the
    10 inverse component of the power grid frequency; an integer multiple of the direct component of the power grid frequency; frequencies defined by the formula ± nfsw ± mfrotoT> where n and m are whole numbers, fsw the switching frequency of the converter and frotor the fundamental frequency of the rotor; d) the vibrations mentioned to one or more of the following
    15 frequencies: frequencies multiple of the frequency of the power grid; frequencies
    defined by the formula fred [± 1 + ±! Q (1 -s) J, where fred is the fundamental frequency of the mains, 9 an integer, Q the number of stator or rotor slots, p the number of pairs of poles and s the generator slip.
    [3]
    3. Method according to claim 1, wherein:-the generator is a doubly fed generator;-the temporary period in which said capture of values is made is a
    period in which the generator is coupled to the power grid and generating 25 power; -the real time evolution of one or more of the following variables is obtained in real time:
    a) the inverse component of the stator voltage at one or more of the following frequencies: power grid frequency; an integer multiple of the inverse component of the frequency of the power grid; an integer multiple of the
    direct component of the power grid frequency;
    b) the inverse component of the stator current at one or more of the
    following frequencies: power grid frequency; an integer multiple of the inverse component of the grid frequency; an integer multiple of the direct component of the power grid frequency;
    c) the inverse component of the rotor voltage at one or more of the following frequencies at a certain speed: fundamental frequency of the rotor; an integer multiple of the inverse component of the fundamental frequency of the rotor; an integer multiple of the direct component of the fundamental frequency of the rotor;
    d) the inverse component of the rotor current at one or more of the following frequencies: fundamental frequency of the rotor at a certain speed; an integer multiple of the inverse component of the fundamental frequency of the rotor at a given speed; an integer multiple of the inverse component of the grid frequency; an integer multiple of the direct component of the power grid frequency; frequencies defined by the formula ± nlsw ± mlroton where n and m are whole numbers, fsw the frequency of switching of the converter and frotor the fundamental frequency of the rotor;
    e) the aforementioned vibrations at one or more of the following frequencies: frequencies multiple of the frequency of the power grid; frequencies
    defined by the formula Ired [± 1 + ±! Q (1-s)], where Ired is the fundamental frequency of the mains, 9 an integer, Q the number of stator or generator rotor slots, p the number of pairs of poles and s the generator slip.
    [4]
    4. Method according to claim 1, wherein:-the generator is a permanent magnet generator;- taking into consideration the values of the variables mentioned to
    the same speed of rotation when in the aforementioned time period the generator is synchronized to the power grid but is not yet coupled to it and the values of the variables mentioned at the same speed of rotation and the same power when the generator is coupled to the power grid,
    the temporal evolution of one or more of the following is obtained in real time
    variables:
    a) the inverse component of the stator voltage at one or more of the
    following frequencies: stator fundamental frequency; an integer multiple of
    5 the inverse component of the fundamental frequency of the stator; a multiple
    integer of the direct component of the fundamental frequency of the stator;
    b) the inverse component of the stator current at one or more of the
    following frequencies: stator fundamental frequency; an integer multiple of
    the inverse component of the fundamental frequency of the stator; a multiple
    10 integer of the direct component of the fundamental frequency of the stator;
    frequencies defined by the formula ± nfsw ± mfestaton being n and m numbers
    integers, fsw the converter switching frequency (13) and festator the
    fundamental stator frequency;
    c) the vibrations mentioned to one or more of the following
    fifteen frequencies: frequencies multiple of the frequency of the power grid;
    frequencies defined by the formula f stator [± 1 + ±: Q], where f stator is the
    Stator fundamental frequency, 9 an integer, Q the number of slots
    of the stator, p the number of pairs of poles.
    twenty 5. Method according to claim 1, wherein:
    -the generator is a squirrel cage generator;
    - taking into consideration the values of the variables mentioned to
    the same turning speed when in the mentioned time period the
    generator is synchronized to the mains but not yet coupled to the
    25 same and the values of the mentioned variables at the same speed of
    turn and the same power when the generator is coupled to the mains,
    the temporal evolution of one or more of the following is obtained in real time
    variables:
    a) the inverse component of the stator voltage at one or more of the
    3 o following frequencies: stator fundamental frequency; an integer multiple of
    the inverse component of the fundamental frequency of the stator; a multiple
    integer of the direct component of the fundamental frequency of the stator;
    b) the inverse component of the stator current at one or more of the
    following frequencies: stator fundamental frequency; an integer multiple of the inverse component of the stator's fundamental frequency; an integer multiple of the direct component of the stator's fundamental frequency; frequencies defined by the formula ± nfsw ± mfestatoT 'where n and m are whole numbers, fsw the switching frequency of the converter and festator the fundamental frequency of the stator;
    c) the vibrations mentioned at one or more of the following frequencies: frequencies multiple of the frequency of the power grid; frequencies defined by the formula f statoT [± 1 + ±: Q (1 -s)], where f statoT is the frequency
    Stator fundamental, 9 an integer, Q the number of stator slots
    or of the generator rotor, p the number of pole pairs and s the generator slip.
    [6]
    6. System for detecting failures in the isolation of the generator (11) of a wind turbine coupled to an electrical network (15) through a converter (13), the wind turbine being provided with measuring means of the electric variables of the generator ( 11) And of its radial-horizontal and radialvertical vibrations on the side of the coupling and / or on the side opposite it, as well as a control system (19) and a data bus (17), characterized in that it comprises a system computer (21) connected to the data bus (17) with software adapted to:
    - capture in real time, during a predetermined time period, the values of one or more electric variables of the generator (11) and / or the values of the radial-horizontal and radial-vertical vibrations of the generator (11) in at least one of the two mentioned sides provided by said measuring devices;
    - obtain in real time, the temporal evolution of the inverse components of said electrical variables at one or more predetermined frequencies and / or the temporal evolution of the values of said vibrations at one or more predetermined frequencies;
    - identify a possible generator insulation fault (11) when the
    The inverse component of at least one electrical variable and / or one of said vibrations at one of said predetermined frequencies exceeds an absolute threshold or a preset time increment threshold.
    [7]
    7. System according to claim 6 wherein the measuring means of the electric variables of the generator (11) are integrated in the converter (13).
    [8]
    8. System according to claim 6 wherein the measuring means of the electric variables of the generator (11) are arranged in a measuring device (16) separated from the converter (13) and connected to the data bus (17).
    [9]
    9. System according to any of claims 6-8, wherein:-the generator (11) is a doubly fed generator;-the temporary period in which said capture of values is made is a
    period in which the generator (11) is synchronized to the power grid (15) but is not yet coupled to it; -the real time evolution of one or more of the following variables is obtained in real time:
    a) the inverse component of the stator voltage at one or more of the following frequencies: power grid frequency (15); an integer multiple of the inverse component of the grid frequency (15); an integer multiple of the direct component of the grid frequency (15);
    b) the inverse component of the rotor voltage at one or more of the following frequencies at a certain speed: fundamental frequency of the rotor; an integer multiple of the inverse component of the fundamental frequency of the rotor; an integer multiple of the direct component of the fundamental frequency of the rotor;
    c) the inverse component of the rotor current at one or more of the following frequencies: fundamental frequency of the rotor at a certain speed; an integer multiple of the inverse frequency component
    fundamental of the rotor at a certain speed; an integer multiple of the
    inverse component of the frequency of the mains (15); an integer multiple
    of the direct component of the frequency of the mains (15); frequencies
    defined by the formula ± nlsw ± mlrotor 'where n and m are whole numbers, fsw the
    5 switching frequency of the converter and frotor the fundamental frequency of the
    rotor;
    d) the vibrations mentioned to one or more of the following
    frequencies: frequencies multiple of the frequency of the power grid (15);
    frequencies defined by the formula Ired [± 1 + ±: Q (1-s)], where Ired is the
    10 fundamental frequency of the mains (15), 9 an integer, Q the
    number of stator or rotor grooves, p the number of pairs of poles and s the
    generator slip (11).
    [10]
    10. System according to any of claims 6-8, wherein:
    fifteen -the generator (11) is a doubly fed generator;
    -the temporary period in which said capture of values is made is a
    period in which the generator (11) is coupled to the power grid and generating
    power;
    -the real time evolution of one or more of the
    2 o following variables:
    a) the inverse component of the stator voltage at one or more of the
    following frequencies: power grid frequency (15); an integer multiple of
    the inverse component of the grid frequency (15); a multiple
    integer of the direct component of the power grid frequency (15);
    25 b) the inverse component of the stator current at one or more of the
    following frequencies: power grid frequency (15); an integer multiple of
    the inverse component of the grid frequency (15); a multiple
    integer of the direct component of the power grid frequency (15);
    c) the inverse component of the rotor voltage at one or more of the
    3 o following frequencies at a certain speed: fundamental frequency of
    rotor; an integer multiple of the inverse component of the fundamental frequency
    of the rotor; an integer multiple of the direct component of the fundamental frequency of the rotor; d) the inverse component of the rotor current at one or more of the following frequencies: fundamental frequency of the rotor at a given
    5 speed; an integer multiple of the inverse component of the fundamental frequency of the rotor at a given speed; an integer multiple of the inverse component of the grid frequency (15); an integer multiple of the direct component of the grid frequency (15); frequencies defined by the formula ± nlsw ± mlrotoTl where n and m are whole numbers, fsw la
    10 frequency of switching of the converter and frotor the fundamental frequency of the rotor; e) the aforementioned vibrations at one or more of the following frequencies: frequencies multiple of the frequency of the power grid; frequencies defined by the formula I network [± 1 + ±: Q (1-s)], Ired being the frequency
    15 fundamental of the mains (15), 9 an integer, Q the number of slots in the generator stator or rotor, p the number of pairs of poles and s the generator slip (11).
    [11 ]
    eleven . System according to any of claims 6-8, wherein: the generator (11) is a permanent magnet generator;
    - taking into account the values of the aforementioned variables at the same speed of rotation when in the mentioned time period the generator (11) is synchronized to the power grid (15) but is not yet coupled to it and the values of the mentioned variables to oneself
    25 rotation speed and the same power when the generator (11) is coupled to the power grid (15), the time evolution of one or more of the following variables is obtained in real time:
    a) the inverse component of the stator voltage at one or more of the following frequencies: stator fundamental frequency; an integer multiple of the inverse component of the stator's fundamental frequency; a multiple
    integer of the direct component of the fundamental frequency of the stator;
    b) the inverse component of the stator current at one or more of the following frequencies: stator fundamental frequency; an integer multiple of the inverse component of the stator's fundamental frequency; an integer multiple of the direct component of the stator's fundamental frequency; frequencies defined by the formula ± nfsw ± mfestatoT! where n and m are whole numbers, fsw the switching frequency of the converter (13) and festator the fundamental frequency of the stator;
    c) the aforementioned vibrations at one or more of the following frequencies: frequencies multiple of the frequency of the power grid (15);
    frequencies defined by the formula f stator [± l + ±! Q], where f stator is the
    Stator fundamental frequency, 9 an integer, Q the number of stator slots, p the number of pairs of poles.
    [12]
    12. System according to any of claims 6-8, wherein:-the generator (11) is a squirrel cage generator;- taking into consideration the values of the variables mentioned to
    the same speed of rotation when in the mentioned time period the generator (11) is synchronized to the power grid (15) but is not yet coupled to it and the values of the variables mentioned at the same speed of rotation and the same power When the generator (11) is coupled to the power grid (15), the time evolution of one or more of the following variables is obtained in real time:
    a) the inverse component of the stator voltage at one or more of the following frequencies: stator fundamental frequency; an integer multiple of the inverse component of the stator's fundamental frequency; an integer multiple of the direct component of the stator's fundamental frequency;
    b) the inverse component of the stator current at one or more of the following frequencies: stator fundamental frequency; an integer multiple of the inverse component of the stator's fundamental frequency; a multiple
    3 O integer of the direct component of the stator fundamental frequency; frequencies defined by the formula ± nfsw ± mfestatoT> where n and m numbers
    integers, fsw the switching frequency of the converter (13) and festator the fundamental frequency of the stator; c) the vibrations mentioned at one or more of the following frequencies: frequencies multiple of the frequency of the power grid; frequencies defined by the formula {Estimate [± 1 + ±; Q (1-s)]. being {set the frequency
    Stator fundamental, 9 an integer, Q the number of stator slots
    or of the generator rotor (11), p the number of pole pairs and s the generator slip (11).
    [305]
    305.00
    •
    [255]
    255.00
    -
    >
    -
    Or 205.00
    - '-ro-in
    Q)
    [155]
    155.00
    and
    'or
    in
    e 105.00
    Q)
    [55]
    55.00
    •
    •
    [5]
    5.00
    •
    •., 00008
    250.00 200.00 150.00 0.00 50.00 100.00 150.00 200.00 250.00
    Frequency (Hz)
    FIG. 1
    :;
    2S O -'- ro-en
    Q) 20
    and
    OR
    in
    e 15
    Weather
     FIG.2a
    the
    5'
    '- "
    2S
    "
    or
    - EC
    (/)
    Q)
    C:
    or
    (/)
    c: lS
    Q)
    -
    EC
    (/) "-lO
    Q)
    >
    C:
    he. 5
    AND
    or
    OR
    or
    [3]
    3.5
    N
    he
    [2]
    2.5
    Q)
    - (/) E 2 c:
    '0 (.)
    1.5
    EC
    "-
    Q)
    Q)
    (.) one
    «
    [0]
    0.5
    •
    or •
    300 350 400
    or 50
    Weather
    FIG.2b
    .. • ..,
    Frequency (Hz)
     FIG. 3
    [11 ]
    eleven ...
    ,

    ...
    ,
    D2
    D1
    I ~,
    "
     04 '04'
    V v
    19
    FIG. 4
    =
     FIG. 6
    F3
    eleven "'"
    - + - ~ -F4
    FIG. 7
    C = ::: "l.
    I
    fifteen
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201500845A|ES2613902B1|2015-11-26|2015-11-26|Method and systems for real-time monitoring of the winding generator winding insulation status|ES201500845A| ES2613902B1|2015-11-26|2015-11-26|Method and systems for real-time monitoring of the winding generator winding insulation status|
    US15/339,074| US10473708B2|2015-11-26|2016-10-31|Methods and systems for real-time monitoring of the insulation state of wind-powered generator windings|
    EP16002483.2A| EP3181900B1|2015-11-26|2016-11-23|Methods and systems for real-time monitoring of the insulation state of wind-powered generator windings|
    DK16002483.2T| DK3181900T3|2015-11-26|2016-11-23|Methods and systems for real-time monitoring of the insulation condition of wind-driven generator windings|
    ES16002483T| ES2843746T3|2015-11-26|2016-11-23|Methods and systems for real-time monitoring of the insulation status of wind generator windings|
    MX2016015500A| MX2016015500A|2015-11-26|2016-11-25|Methods and systems for real-time monitoring of the insulation state of wind-powered generator windings.|
    BR102016027752A| BR102016027752A2|2015-11-26|2016-11-25|methods and systems for real-time monitoring of wind generator winding insulation status|
    CN201611063682.6A| CN107037331B|2015-11-26|2016-11-25|Method and system for monitoring the insulation state of a wind turbine winding in real time|
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