• 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:

    公开号:SU1838845A3
    申请号:SU914894884
    申请日:1991-03-20
    公开日:1993-08-30
    发明作者:Donal Diter；Kugler Kurt
    申请人:Mashinenfabrik Rajnkhauzen Gmb；
    IPC主号:
    专利说明:

    The invention relates to a control system for step switches, in which the load is switched using a vacuum circuit breaker available in each of the switched phases.
    The aim of the invention is to increase the reliability of the control method and system, which can be located at a distance from the step switch and can be easily and quickly returned to its original position after being triggered in the event of an error, that is, it is brought to a state of readiness for operation.
    The drawing shows a diagram of the proposed control system.
    At the current lead of each vacuum circuit breaker 1, 2 and 3, which operate as a load switch for a switched phase, a saturable current transformer 4, 5 and 6 is installed with an additional electronic limiting circuit that generates the output voltage for the transmission diodes 7, 8 and 9 of the optical waveguide .
    »SU, .n 1838845 AZ
    In this case, a unit consisting of a current transformer and an electronic limiting circuit ( it is advisable to rigidly weld to / I the current supply of the corresponding vacuum circuit breaker: the sensitivity threshold of the device is less than or equal to 10 A.
    Current transformers 4 and 6 signal along the corresponding waveguide lines, at the end of which radiation detectors 10, 11 and 12 are installed, whether the current flows in the corresponding branch or not.
    The optical fibers are preferably made in the form of a fiberglass bundle or monofilament with a Teflon sheath and equipped with transmitting diodes 7, 8, 9 and receivers 10, 11 and 12. Each receiver preferably contains an integrated amplifier with TTL output.
    In this process of switching, two monitoring moments are provided, when the control device is activated, which is realized through synchronous contacts 13 and 14.
    At these monitoring moments, regulated by the switching movement of the step switch, into which one of the two synchronous contacts 13 or 14, made in the form of reed switches, is activated, the signals are compared in the recognition logic 15, which recognizes an error of the monitor system or logic recognition circuit 16. which recognizes the possible failure of one of the vacuum switches 1, 2 or 3.
    Such error detection occurs as follows.
    Using contacts 13, the first moment of control is determined: it is located on the switching process section, in which, before the start of the stage switching, the step-by-step switching off of the switches 1,2 and 3 are still closed. In this case, it is checked whether the state is the same in all three phases. If a difference is detected, then it is concluded that at least one of the current-sensing devices is defective, and the recognition logic signals a system damage.
    Contact 14 determines the second moment of monitoring. It corresponds to the moment of movement when the vacuum circuit breakers 1, 2 and 3 have just opened, but before the movement (without power consumption) of the step finder. If in one of the phases a current flow is detected, this means that the vacuum circuit breaker is defective in this branch; in accordance with this, a fault signal is generated.
    The described error detection and differentiation into errors in current detection, on the one hand, and errors in one or more vacuum circuit breakers, on the other hand, is carried out using a recognition logic circuit that combines the functions of the systems indicated by positions 15 and 16.
    Using contacts 15, the function of the current-recording branch is monitored at the first moment of monitoring (described in more detail above), and using contacts 16, the function of vacuum switches 1, 2, and 3 is checked at a later, second moment (also already described).
    The indicator 17 (system control) gives a fault signal if, at the moment when the synchronous contact 15 closes briefly and the signal level is conjunctively switched to signals from current detection, all three current-registering branches supply either a signal or there is a current, or there is no current. Similarly, indicators
    18. 19 and 20 signal damage to the corresponding vacuum circuit breaker 1, 2 and 3 if, at the moment at which the synchronous contact 16 generates a signal, a current flow is detected in this phase.
    It is advisable to use relays with two stable states for damage signaling, which can only be returned to the previous state by authorized personnel.
    Using the light guide line, which is connected to a current transformer located on the current lead of each vacuum element, it is possible to place the entire processing circuit outside the step converter. Obviously, this greatly improves its availability.
    Making synchronous contacts in the form of reed switches makes mechanical connection with a step switch or drive unnecessary.
    Finally, the proposed control system allows for self-control; at a special monitoring moment of time, the function of recording current in each phase is checked and, if necessary, an error signal is sent in the system.
    权利要求:
    Claims (7)
    [1]
    Claim
    1. A method for monitoring step load switches of step transformers containing vacuum circuit breakers in the phases of the switched circuit, according to which the function of the vacuum circuit breakers of the switch is controlled by current transformers, which are connected to the current inputs of the vacuum circuit breakers, and in the event of an error in the operation of the vacuum circuit breakers, they generate an error signal for blocking the step switch and preventing the step-by-step transformer finder erroneously loading under load ator, characterized in that, in order to increase reliability, at the first moment of control, corresponding to the moment of the switching process, when the vacuum circuit breakers in each phase are still closed before starting the switching of stages, they check whether there is the same state in all phases, namely that in all phases a current flows, the force of which is higher than the recognition threshold, and otherwise an error signal is generated, and in the second. a later monitoring moment, corresponding to the moment of the switching process, when the vacuum circuit breakers have just opened, however, the load-free movement of the step transformer finder to the next stage has not yet begun, check whether all phases are de-energized, and otherwise generate an error signal.
    [2]
    2. A control system for step switches of load of step transformers, made in the form of vacuum circuit breakers, included in the phases of the switching circuit, containing current transformers connected to the current inputs of the respective vacuum circuit breakers, designed to control the functions of the vacuum circuit breakers and generate an error signal in order to block the step circuit switch and prevent erroneous further switching under load step transformer finder, different themes. that, in order to increase reliability, it is equipped with two sync contacts driven by a step switch, a double error recognition logic circuit and light-transmitting lines according to the number of phases of the switched circuit, each made in the form of a transmitting diode, a flexible fiber and a light receiver, current transformer outputs in each phase connected to the transmitting diodes of the corresponding light-transmitting lines, the position of the first of the sync contacts at the initial moment of the switching process, when the vacuum circuit breakers are not yet A closed is momentarily closed, the position of the second sync at a later point switching process when the vacuum circuit breakers have opened. but the switching of the step finder has not yet begun, is also briefly closed, and the light-receiving lines and both sync contacts are connected to the inputs of the indicated double error recognition logic circuitry, which is designed to generate error signals at their outputs, if at the moment of closing the first of the sync contacts, not all phases have the same electrical state, and when the second sync contact is closed, not all phases are de-energized.
    [3]
    3. The system according to p. 2, characterized in that the sync contacts are made in the form of magnetic reed switches.
    [4]
    4. The system of claims. 2 and 3, characterized in that each current transformer is made saturable and is equipped with an electronic limiting circuit limiting the output voltage supplied to the corresponding transfer LED.
    [5]
    5. The system according to claim 5, characterized in that the assembly consisting of a current transformer and said electronic limiting circuit. rigidly mounted on the current input section of the vacuum circuit breaker.
    [6]
    6. The system according to claim 2, characterized in that the flexible optical fibers of the light-transmitting lines are made in the form of fiberglass beams or single fibers with a Teflon sheath.
    [7]
    7. The system according to claim 2, with respect to that. that to the outputs of the error recognition circuit are connected additionally introduced indicators made in the form of a relay with two stable states.
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    同族专利:
    公开号 | 公开日
    CA2038063C|1999-12-07|
    FR2660121A1|1991-09-27|
    FR2660121B1|1994-04-15|
    SE9100773L|1991-09-22|
    DE4009038A1|1991-09-26|
    SE9100773D0|1991-03-14|
    US5128605A|1992-07-07|
    CA2038063A1|1991-09-22|
    DE4009038C2|1992-01-16|
    JPH04222418A|1992-08-12|
    SE469006B|1993-04-26|
    BG60751B2|1996-02-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    RU2658290C2|2013-04-04|2018-06-20|Машиненфабрик Райнхаузен Гмбх|Method for performing a switching process in an on-load tap changer|
    RU2671810C1|2012-04-27|2018-11-07|Машиненфабрик Райнхаузен Гмбх|Method for controlling operation of stage switch|DE213329C|
    US3436646A|1966-08-02|1969-04-01|Westinghouse Electric Corp|Load tap changer systems including protective apparatus for monitoring the operation of the transfer switches|
    US3555404A|1968-07-05|1971-01-12|Reinhausen Maschf Scheubeck|Tap-changing transformer system including vacuum switch units|
    US3544884A|1968-12-27|1970-12-01|Westinghouse Electric Corp|Load tap changer apparatus employing parallel circuits comprising vacuum and no-load switches|
    US3622867A|1970-04-16|1971-11-23|Westinghouse Electric Corp|Load tap changer system including protective apparatus for monitoring the operation thereof|
    US3684948A|1971-02-08|1972-08-15|Gen Electric|Potential device with input reactance adjustment|
    DE2137090A1|1971-07-24|1973-02-08|Transformatoren Union Ag|ARRANGEMENT FOR MONITORING STEP-BY-STEP CONTROL UNITS OF CONTROL TRANSFORMERS|
    IT1010601B|1974-03-11|1977-01-20|Legnaioli L|ELECTRIC MACHINE TO CHANGE THE TRANSFORMATION RATIO OF A VOLTAGE WITH THE AID OF SWITCHES|
    US4048520A|1976-05-24|1977-09-13|Vectrol, Inc.|Three-phase SCR drive circuit using an opto-coupled pulse amplifier|
    US4090225A|1977-01-21|1978-05-16|Mcgraw-Edison Company|Fail-safe circuit for tap-changing transformer regulating system|
    US4388664A|1980-08-04|1983-06-14|Fuji Electric Co., Ltd.|Apparatus for protecting vacuum interrupter type on-line tap changer|
    DD213329A1|1983-01-07|1984-09-05|Liebknecht Transformat|PROTECTIVE EQUIPMENT FOR A TRANSFORMER WITH STAGE SWITCH|US5550460A|1994-09-29|1996-08-27|Siemens Energy & Automation, Inc.|Voltage regulator control system with multiple control programs|
    DE4439813C1|1994-11-08|1996-06-20|Reinhausen Maschf Scheubeck|Tap changer and method for monitoring it|
    DE19518272C1|1995-05-18|1996-10-24|Reinhausen Maschf Scheubeck|Tap-switch for transformers|
    DE19523270C1|1995-06-27|1996-09-05|Reinhausen Maschf Scheubeck|Transformer stepping switch monitoring system|
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    US8643221B2|2010-06-08|2014-02-04|Siemens Energy, Inc.|Retrofit kit, circuitry and method for reconfiguring a tap changer to avoid electrical arcing|
    BR112013024908B1|2011-03-27|2021-02-17|Abb Schweiz Ag|on-load tap-changer to switch taps on a transformer winding|
    WO2012135213A1|2011-03-27|2012-10-04|Abb Technology Ag|Tap changer with an improved monitoring system|
    US9898019B2|2012-12-27|2018-02-20|Xiaoming Li|Thyristor assisted on-load tap changer and method thereof|
    USD757796S1|2014-03-14|2016-05-31|Maschinenfabrik Reinhausen Gmbh|Portion of a monitor with an icon|
    US9679710B1|2016-05-04|2017-06-13|Cooper Technologies Company|Switching module controller for a voltage regulator|
    DE102019112713A1|2019-05-15|2020-11-19|Maschinenfabrik Reinhausen Gmbh|SWITCH ARRANGEMENT AND PROCEDURE FOR SAFE OPERATION OF A SWITCH ARRANGEMENT|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE4009038A|DE4009038C2|1990-03-21|1990-03-21|
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