• 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:
    The present invention relates to a method for monitoring a tap selector, in which case the torque of the drive shaft performed on the tap selector from the relevant motor drive is determined from the measured values of current and voltage, and by means of various method steps specifically expressed. It is compared with the corresponding predetermined target value typical for the device. Each result of this comparison produces a trend description or, in the case of a significant deviation, the switching of the motor drive is immediate.
    公开号:KR19990036823A
    申请号:KR1019980041577
    申请日:1998-10-02
    公开日:1999-05-25
    发明作者:디터 도날；만프레드 스타델마여
    申请人:류르만 하로엠, 마이어 게럴드；마쉬넨파브릭 레인하우센 게엠베하；
    IPC主号:
    专利说明:

    How to monitor tap selector
    The present invention relates to a method of monitoring a tap selector for use for uninterrupted switching between taps of a tap transformer.
    What is already known in German patent 4214431 is that the motor drive associated with the corresponding tap selector provides specific information.
    That is, the information relates to tap selection, realistic setting of the tap selector during the switching process, arrival of each phase and lower end setting, selection mode of operation, tripping of the motor circuit breaker, and the like.
    However, this information is not sufficient to monitor the corresponding tap selector for operational capacity, i.e. to obtain a monitoring function.
    For example, a microprocessor controlled voltage regulator of type TCS is known which similarly realizes the following clear monitoring functions (see publication of MR Rheinhausen GmbH: Microprocessor controlled voltage regulator TCS, printed VK 34/96 DE-0896 / 1000).
    Monitoring of reactive current between two transformers connected in parallel.
    Realization of overcurrent blocking of tap selector
    Undervoltage Monitoring
    Overvoltage monitoring with safety cutoff
    Comparison of actual values of target value and regulated voltage
    In this case, data for directly monitoring the operation state of the corresponding tap selector is not detected.
    As the input size, only currents and voltages are represented at that moment, and these values cannot provide a proper judgment of the operating state without specific methods of additional data and data processing.
    Also in Japanese patent application JP-60-176213A, it is known to detect and store the torque of the drive shaft leading from the motor drive to the tap selector in order to set a specific target torque for the actual torque process.
    A similar method is then described in German patent DD 246 409, whereby the torque process over time is measured similarly at the time of conversion, and the result is compared with the typical torque process over time for each tap selector.
    In this case, if an unacceptable deviation occurs between the target process and the actual process, a block is made.
    However, due to the difficult detection of torque, this method has not been effective in the past.
    Finally, it has already been proposed that it is possible to confirm the angular torque by detecting the active power of the drive motor which indirectly generates each torque, rather than a direct mechanical measuring means, but this is obviously also not realized in the past.
    The present invention allows for reliable monitoring of the tap selector, starting with an identifiable amount of electrical measurement without delay, and describing a method of monitoring a tap selector that allows an appropriate reaction to this deviation from a steady state in the event of a false detection action. The purpose.
    This object is met by the method of the invention characterized by the claims 1 and 2 which are next to each other, and the two methods can be used as equivalent alternative solutions for the same purpose.
    The cuppings are particularly concerned with the advantageous development of the method according to the invention.
    This method according to the invention allows the tap selector to be monitored in a simple manner at all times during load switching, ie during the operation of the combined motor drive.
    Based on the torque process identified through the method of the present invention, each specific part of these torque processes can be combined with the corresponding time of the switching process in a simple manner.
    Thus, conclusions about each subassembly of the tap selector, such as preselector, reverser, fine selector, and load changeover, can be drawn for all load transitions, and the subassemblies can be placed in a specific blocking typical sequence. In turn.
    The invention is described in more detail below with reference to the drawings.
    1 is a schematic diagram of a procedure underlying the method described in claims 1 and 2.
    Figure 2 shows the progress of two typical ejection torques, a) and b), respectively, in the opposite direction of rotation of the motor drive. That is, it shows the "high" direction at one moment of tap selector operation and the "deep" direction at another instant of tap selector operation.
    FIG. 3 is a continuing schematic diagram of a wider measurement size and model for further consideration in relation to FIG. 1.
    4 is a schematic diagram of a monitoring step generally used in the method according to the invention.
    First, FIG. 1 will be described in detail.
    In the motor configuration related to each tap selector, the effective values of current and voltage are confirmed at each load switching, from which active power is calculated by a known method, and corresponding torque is calculated therefrom.
    At the same time, positioning takes place when the motor is driven.
    In other words, it checks which area of the switching sequence actually passes through when switching.
    It also derives where each subassembly, such as the preselector, selector and load changeover switch, passes through or in what actual position within the preswitching sequence to go.
    Position detection is achieved in a particularly advantageous way by means of an resolver which allows for continuous detection.
    Subsequently, according to the first method of the invention described in claim 1, the value pairs on the one hand are actually arbitrarily delicately stepped, i.e. each position that can be rasterized upon load switching. On the other hand, at the torque values identified at each of these positions.
    The values of these identified pairs are compared to the values, targets, and limits of the pair of tap selectors unique to that already stored.
    Based on the results of this comparison, a unique status report is generated.
    The comparison also generates a controlled " OK " report if each corresponding actual pair value and target pair value match.
    In the above report, if the deviation is within a preset limit or at the same preset value of the pair of values, a report is generated indicating the maintenance to be performed at a certain point in time that does not stop the normal operation of the tap selector.
    If deviations exceed the values just described, a fault report is issued to stop the motor drive.
    Another method according to the invention described in claim 2 has the same procedure as in the first method, in which case or verifying the effective values of the current and voltage, and the positioning is carried out simultaneously as already described.
    In this method, the relationship of the corresponding torque corresponds to the rotation angle covered at the time of load switching and is made in time.
    In that case, the actual value of the torque is generated at a constant short time interval, for example every 20 milliseconds (ms), and stored in the ring buffer.
    Next, synchronization is performed by the synchronization pulse device.
    Such a synchronous pulse is generated from the onset of a special characteristic action during the load switching process at time t syn .
    Triggering of a force storage device that triggers a sudden actuation of the load changeover switch is used as a special advantage for the generation of this sync pulse.
    Thus, measurement values are recorded by the principle of an instant recorder of the original public announcement.
    The advantages of this discovery are described in detail as follows by reference to FIG. 2.
    FIG. 2A shows the measuring torque process at the time t of load switching or about the passage S which the tap selector covers when switching.
    2B below shows another measurement torque process in the opposite rotational direction of the drive shaft, that is, in the opposite switching direction.
    It can be appreciated therefrom mechanical tolerances in the gear train, so-called initial room ionizing torque and other point after the start of the motor drive at a time point (t s) due to the influence by the characteristic point in the first of the torque process in (t o), rotation Different times have occurred depending on the direction.
    Therefore, the corresponding coarse cannot be compared without continuous measurement and must first be unified in time.
    This occurs through the motivation already described.
    Next, in the second method according to the present invention, the torque course synchronized in such a manner is decomposed into a feature part, namely a window.
    In that case, each window corresponds to a characteristic part of each transition procedure.
    Such a window includes, for example, the operating time of the preselector, fine selector or load changeover switch.
    In that case, each window is limited by two respective time points (t o -t 1 , t 1 ... t syn -t n ) that fix the beginning and end of the window in time.
    Each of these windows is compared with a previously stored specific target value.
    This selective comparison method allows not only the deviation of the actual value from the target value of the torque, and therefore the error, to be detected, but also the occurrence error to be attributed to the specific subassembly that caused it.
    Apart from the error detection, trend analysis of mechanical parts is possible at the same time.
    In addition, it is evident that by the both methods according to the present invention, the maximum value for the torque can be set in advance so that the stopping of the motor drive when the torque value is exceeded can be immediately realized regardless of other criteria.
    In the further development of the present invention, it is also possible to continuously incorporate size monitoring into the method of the present invention, which is shown in FIG. 3.
    In addition to the described detection of the actual motor power, and therefore the torque on the one hand and the position detection of the tap selector on the other hand, the measured temperature of the insulating medium in the load changeover switch, transformer oil with the selector of the tap selector in general and Ambient air is considered.
    In addition, the contact wires of the load changeover switch are further confirmed, and judgment is made for the determination of the operating state through the wire model.
    The nature of the present invention is recombined with reference to FIG.
    Characteristic measurements, here current and voltage values, are detected during the transition, and information about each prevailing effective current is generated therefrom, thus producing actual torque.
    The comparison with the target value and the evaluation of the comparison are then made, resulting in data or reports indicating various priorities.
    If there is a significant deviation from each target value, for example, when the load changes, the torque exceeds the allowable absolute target value and an immediate switch off is necessary.
    And in non-hazardous areas where immediate safety is not a concern, rapid maintenance is recommended, data suggesting predicted service life or other cold statements are published.
    In the tap selector used for the transformer installed in the substation, by adopting the monitoring method according to the present invention, it is possible to immediately stop switching in the event of a faulty operation of the part, thereby preventing a large accident in advance, and also causing safety problems. In areas that are not available, required data such as maintenance can be displayed to enable maintenance of the device before danger.
    权利要求:
    Claims (4)
    [1" claim-type="Currently amended] In the method for monitoring the tap selector characterized by the following method steps,
    During load switching, that is, when the tap selector is operated, the effective values of voltage and current are measured in the drive motor of the associated motor drive, the active power is calculated from them, and the torque is determined from them, and the position of each actual setting of the tap selector. The detection is carried out simultaneously, each decision torque being associated with the associated position where the torque is generated and forming a corresponding pair of dentures, which pair values are compared with a previously stored target value that is specific to the device and optionally calibrated to the ambient temperature. And a signal for instructing motor operation, i.e., stopping the tap selector or instructing maintenance, is generated when a deviation of the pair value is exceeded when the threshold value is exceeded.
    [2" claim-type="Currently amended] In the method for monitoring the tap selector characterized by the following method steps,
    At load switching, i.e. when the tap selector is operated, the effective values of voltage and current are measured in the drive motor of the relevant motor drive, the effective power is calculated from them, and the torque is determined from them, and each actual setting of the tap selector The position detection of is executed at the same time, the value for the torque determined in time is stored, and then synchronization is achieved by the synchronous pulse generated when the specific state of the load switching is reached at the specific time (t syn ) during triggering of the force storage device. Then, the normal process of torque is classified into the typical time domain (t o -t 1 , t 1 ... t syn -t n ) corresponding to the decision part of the selector-specific switching procedure. (t o -t 1 , t 1 ‥‥‥ t syn -t n ), the so-called windows are compared with the previously stored unique target values, respectively, exceeding a predetermined threshold, and when the deviation of the paired values compared with each other occurs, the motor Driving, ie stopping the tap selector Or a signal instructing maintenance is generated.
    [3" claim-type="Currently amended] The method of claim 1,
    Position detection is a method of monitoring a tap selector, characterized in that is carried out continuously by each position measuring device.
    [4" claim-type="Currently amended] The method of claim 1,
    Monitoring of the tap selector characterized in that the measured size of the load changeover switch oil, the surrounding transformer oil, the contact wires of the external air and / or mechanical switching contacts are further included in the evaluation, ie the comparison between the target value and the actual value. Way.
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    同族专利:
    公开号 | 公开日
    AT251794T|2003-10-15|
    BG102768A|1999-04-30|
    HU9802216A2|1999-05-28|
    CZ323398A3|1999-04-14|
    DK917169T3|
    BR9803833A|1999-12-28|
    CA2249975C|2007-01-09|
    CN1155027C|2004-06-23|
    ES2203861T3|2004-04-16|
    DK0917169T3|2004-02-16|
    HK1021068A1|2004-02-06|
    EP0917169A3|2000-03-08|
    HU9802216A3|2001-01-29|
    CA2249975A1|1999-04-08|
    JPH11191998A|1999-07-13|
    EP0917169A2|1999-05-19|
    BG63480B1|2002-02-28|
    RU2209500C2|2003-07-27|
    KR100546728B1|2006-05-09|
    CN1215215A|1999-04-28|
    HU9802216D0|1998-12-28|
    HU223544B1|2004-09-28|
    EP0917169B1|2003-10-08|
    DE19744465C1|1999-03-11|
    US6124726A|2000-09-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1997-10-08|Priority to DE1997144465
    1997-10-08|Priority to DE19744465.2
    1998-10-02|Application filed by 류르만 하로엠, 마이어 게럴드, 마쉬넨파브릭 레인하우센 게엠베하
    1999-05-25|Publication of KR19990036823A
    2006-05-09|Application granted
    2006-05-09|Publication of KR100546728B1
    优先权:
    申请号 | 申请日 | 专利标题
    DE1997144465|DE19744465C1|1997-10-08|1997-10-08|Means for regulation of a multi-contact switch for tapped transformer|
    DE19744465.2|1997-10-08|
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