Auxiliary verification device for relay protection of transformer substation

Abstract

The utility model discloses a transformer substation relay protection auxiliary verification device, which overcomes the problems that in the prior art, main transformer protection needs to be manually switched on and switched off for multiple times, debugging time is long, and working efficiency is low, and comprises a power supply module, the power supply module is connected with a control module, and the control module is connected with a voltage monitoring module and a switching value input module. The voltage monitoring module comprises a plurality of groups of voltage detection loops which are mutually connected in parallel, each voltage detection loop comprises a voltage monitoring relay monitoring contact, and the voltage monitoring relay monitoring contacts are connected with an outlet pressing plate of a detected device through a test wire. The backup power automatic switching and transformer protection transmission test process can be simplified, and the tripping matrix outlet loop can be accurately and rapidly checked, so that the protection debugging time is shortened, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power system technical field especially relates to a substation relay protection auxiliary check device. BACKGROUND

[0002] Safety automatic device, relay protection device is an extremely important part, in the standby automatic switching device, transformer protection, line protection maintenance, reconstruction or acceptance, need to carry out a series of test processes such as logic function check, circuit breaker transmission, tripping matrix verification.

[0003] The switch input of standby automatic switching device involves information such as incoming line switch, bridge switch position TWJ, KKJ, transformer protection action, in actual inspection process, two-way incoming line switch and mother switch often cannot stop completely, and related shutdown interval equipment maintenance work and standby automatic switching device check cannot be carried out simultaneously, and the correctness of logic outlet needs to be tested by artificially short-circuiting related circuit breaker position and other input quantities during the process of checking the standby automatic switching device, which needs to be completed by multiple people, and the success rate is low, which is easy to cause repeated tests and requires high skill level of test personnel.

[0004] Therefore, during the debugging of the standby automatic switching device and transformer protection, the circuit breaker action often does not meet the expectation due to improper parameter setting of the relay protection instrument or improper control word and pressure plate of the protection device, so it is necessary to recombine the circuit breaker. It is time-consuming and laborious to manually open and close the circuit breaker multiple times using the measurement and control device. For example, the patent CN212031626U, a logic inspection instrument for standby automatic switching device, was disclosed by the China Patent Office on November 27, 2020, which uses the method of single-pole air switch to simulate the open and closed states of the switch, and has multiple single-pole air switches, which is complex and time-consuming. SUMMARY

[0005] The utility model discloses a substation relay protection auxiliary check device, which can simplify the standby automatic switching device and transformer protection transmission test process, and accurately and quickly inspect the tripping matrix outlet loop, thereby shortening the protection debugging time and improving the work efficiency.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a substation relay protection auxiliary check device, including power module, control module is connected with power module, voltage monitoring module and switch quantity input module are connected with control module, voltage monitoring module includes a plurality of groups of mutually parallel voltage detection loop, voltage detection loop includes voltage monitoring relay monitoring contact, voltage monitoring relay monitoring contact passes through test line and is connected the export pressure board of measured device, measured device includes spare automatic throw-in device and main transformer protection device.

[0008] The substation relay protection auxiliary check device provided by the utility model can simultaneously simulate the breaker closing and opening actions of two incoming line intervals and one bus interval, and can provide corresponding breaker positions and closed positions as switch quantity inputs to the spare automatic throw-in device, and can make corresponding responses according to the action of the spare automatic throw-in device, and can automatically feed back the corresponding breaker positions and switch quantity input switching information to the spare automatic throw-in device, thereby effectively reducing the number of times of manually closing the breaker in the measurement and control device and the number of times of observing the actual actions of the breaker and the input quantity, optimizing the allocation of human resources, and improving the operation safety.

[0009] Preferably, the control module comprises an interval simulation operation board, the interval simulation operation board comprises a closing module and a tripping module connected through an intermediate relay, the closing module and the tripping module are connected with the power module, the tripping module is connected with a voltage monitoring relay in parallel, and the voltage monitoring relay is connected with an indication module in parallel.

[0010] Preferably, the interval simulation operation board comprises a closing time relay and a tripping time relay, and the closing time relay and the tripping time relay are connected with the power module.

[0011] Preferably, the switch quantity input module comprises a tripping relay auxiliary contact iTJ-4 and a closing relay auxiliary contact iHJ-4, and the tripping relay auxiliary contact iTJ-4 and the closing relay auxiliary contact iHJ-4 are connected with the rear terminal row of the measured spare automatic throw-in device.

[0012] Preferably, the utility model further comprises a timing module, and the timing module comprises a plurality of timing units, each timing unit comprises a timer and a timing starting module connected with the timer.

[0013] Preferably, the power module comprises a rectifier device and a storage battery, the rectifier device is connected with commercial power, the rectifier device is connected with the storage battery through a charging air switch, and the storage battery is connected with the control module through a storage battery DC output switch.

[0014] As preferred, the closing module comprises a closing relay, one end of which is connected with the negative pole of the power module, the other end of which is connected with one end of the auxiliary contact iTJ-2 of the tripping relay, the auxiliary contact iTJ-2 of the tripping relay is connected in parallel with the first manual switch, the other end of the auxiliary contact iTJ-2 of the tripping relay is connected with the intermediate relay, and the other end of the auxiliary contact iTJ-2 of the tripping relay is connected with the positive pole of the power module.

[0015] As preferred, the voltage monitoring module comprises a detection terminal g0, one end of which is connected with the voltage detection relay in the control module, and the other end of which is grounded.

[0016] As preferred, the timing starting module comprises a first timer and a second timer, the first timer is connected with the first debugging device outgoing contact, the first timer is connected in parallel with the first operation button, and the first timer is connected with the auxiliary contact iHJ-5 of the closing relay; the second timer is connected with the first debugging device, the second timer is connected in parallel with the second operation button, and the second timer is connected with the auxiliary contact iTJ-5 of the tripping relay.

[0017] As preferred, the tripping module comprises a tripping relay, one end of which is connected with the negative pole of the power module, the other end of which is connected with one end of the auxiliary contact iHJ-2 of the closing relay, the auxiliary contact iHJ-2 of the closing relay is connected in parallel with the second manual switch, the other end of the auxiliary contact iHJ-2 of the closing relay is connected with the auxiliary contact iTJ-1 of the tripping relay and the auxiliary contact iTSJ-1 of the tripping monitoring relay respectively, and the other end of the auxiliary contact iHJ-2 of the closing relay is connected with the positive pole of the power module.

[0018] As preferred, the power module further comprises a bypass power switch, one end of which is connected with the rectifier device, and the other end of which is connected with the control module.

[0019] As preferred, the power module further comprises a second LED lamp, the negative pole of the second LED lamp is connected with the negative pole of the rectifier device through the bypass power switch and connected with the negative pole of the storage battery through the storage battery DC output switch, and the positive pole of the second LED lamp is connected with the positive pole of the rectifier device through the bypass power switch and connected with the positive pole of the storage battery through the storage battery DC output switch.

[0020] As preferred, the power module further comprises a power monitoring screen, which is connected with the storage battery.

[0021] Therefore, the utility model has following beneficial effect: can simulate two incoming line interval, one mother branch interval breaker switch on and off action behavior simultaneously, and provide corresponding breaker position, after closing position and the like switch quantity input to spare power transfer device, according to the action of spare power transfer device, make corresponding reaction, and the corresponding breaker position, switch quantity input switching information is automatically fed back to spare power transfer device, effectively reduces the times of manual closing breaker in the measurement and control device and observes the actual action times of breaker, input quantity, optimizes human resource allocation, improves operation safety. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the overall structure schematic diagram of auxiliary checking device for relay protection of transformer substation in the utility model.

[0023] Figure 2 It is the circuit structure schematic diagram of timing module in the utility model.

[0024] Figure 3 It is the circuit structure schematic diagram of rectifier device in example three.

[0025] In the drawing: 1, control module;2, voltage monitoring module;3, switch quantity input module;4, power module. DETAILED DESCRIPTION

[0026] The utility model will be further described in detail in combination with the specific embodiment and the accompanying drawings:

[0027] Example one:

[0028] The embodiment is a kind of auxiliary checking device for relay protection of transformer substation, and its overall structure as shown in Figure 1 Including control module 1, voltage monitoring module 2, switch quantity input module 3 and power module 4, voltage monitoring module is connected with control module, switch quantity input module is connected with control module, power module is connected with control module.

[0029] The tripping matrix is a kind of power system protection equipment based on matrix operation and logic judgment. Its principle is to monitor the state and parameter of power system in real time, and transmit these information to tripping matrix through data communication. Tripping matrix carries out matrix operation and logic judgment on these information, and judges whether the current power system is in fault state or possible fault state. If the power system has occurred fault, tripping matrix will trigger protection action, disconnect circuit and protect the safe operation of power system.

[0030] In operation, the power module provides working power for the monitoring module and the voltage monitoring module, the monitoring module is used for observing the pulse condition of the instantaneous action of the outlet matrix, and the voltage monitoring module is used for closing the outlet contact in the CPU board of the related protection device when the corresponding time limit of the trip matrix of the main transformer protection device acts, so as to verify the correctness of the trip matrix.

[0031] The substation relay protection auxiliary checking device provided by the embodiment will be further described in combination with a specific structure.

[0032] (1) Power module.

[0033] In the embodiment, the power module comprises a rectifier device, a storage battery, an AC power supply main switch AK, two charging air switches 1DK, two storage battery DC output switches 2DK and two bypass power supply switches 3DK.

[0034] Specifically,

[0035] One end of the rectifier device is connected with one end of the AC power supply main switch AK, the other end of the AC power supply main switch AK is connected with a commercial power supply, the positive output end of the rectifier device is connected with one end of the first charging air switch 1DK and one end of the first bypass power supply switch 3DK respectively, the other end of the first bypass power supply switch 3DK is connected with the monitoring module, the other end of the first charging air switch 1DK is connected with one end of the first storage battery DC output switch 2DK and the positive electrode of the storage battery respectively, and the other end of the first storage battery DC output switch 2DK is connected with the other end of the first bypass power supply switch 3DK; the negative output end of the rectifier device is connected with one end of the second charging air switch 1DK and one end of the second bypass power supply switch 3DK respectively, the other end of the second bypass power supply switch 3DK is connected with the monitoring module, the other end of the second charging air switch 1DK is connected with one end of the second storage battery DC output switch 2DK and the negative electrode of the storage battery respectively, and the other end of the second storage battery DC output switch 2DK is connected with the other end of the second bypass power supply switch 3DK.

[0036] In operation, in the normal operation mode, the AC power supply main switch AK and the two charging air switches 1DK are closed, and the two bypass power supply switches 3DK and the two storage battery DC output switches 2DK are opened, so as to charge the storage battery. The AC power supply main switch AK, the two charging air switches 1DK and the two bypass power supply switches 3DK are opened, and the two storage battery DC output switches 2DK are closed, so as to provide working power for the monitoring module and the voltage monitoring module by directly supplying power with the storage battery. When the storage battery fails, the device can be directly powered by closing the AC power supply main switch AK and the two bypass power supply switches 3DK in the bypass power supply mode, so as to increase the power supply reliability.

[0037] In this embodiment, the power module also includes a light-emitting diode (LED) (i.e., a second LED). The positive terminal of the LED is connected to the other end of the first bypass power switch 3DK, and the negative terminal of the LED is connected to the other end of the second bypass power switch 3DK.

[0038] The light-emitting diode (LED) is used to detect whether the power module can supply power stably. If it can, the LED will light up; otherwise, the LED will not light up.

[0039] Specifically, if the LED does not light up when powered by the battery, it indicates that the battery is low on power or has malfunctioned. In this case, it is necessary to switch to bypass power supply mode, where the mains power is rectified to directly power the monitoring module and voltage monitoring module.

[0040] (2) Control module.

[0041] In this embodiment, the control module includes three spaced-out analog operation panels. Figure 1 The diagram only shows the interval principle of one interval operation simulation board. Figure 1 In the diagram, the text description on the right side of the control module indicates the function of the corresponding loop of the control module, and i=1, 2, 3, which represent the components in the i-th interval simulation operation board.

[0042] Specifically, the bay simulation operation panel includes: trip relay iTJ, closing relay iHJ, first manual switch QK, second manual switch QK, trip relay auxiliary contact iTJ-3, trip relay auxiliary contact iTJ-2, trip relay auxiliary contact iTJ-1, manual opening / closing switch handle iKK, closing relay auxiliary contact iHJ-3, closing relay auxiliary contact iHJ-2, closing relay auxiliary contact iHJ-1, voltage monitoring relay iHSJ, voltage monitoring relay iTSJ, time relay 1SJ, time relay 2SJ, closed position indicator iLED1, trip position indicator iLED2, voltage monitoring relay normally open contact iHSJ-1, and voltage monitoring relay normally open contact. iThe other end of the closing relay auxiliary contact iHJ-2 is connected with the voltage monitoring relay normally open contact iHSJ-1 and the second end of the manual closing and opening switching handle iKK respectively, and the other end of the voltage monitoring relay normally open contact iHSJ-1 and the second end of the manual closing and opening switching handle iKK are connected with the positive pole of the power module, and the first manual switching switch QK is connected in parallel with the closing relay iHJ. i The other end of the closing relay auxiliary contact iHJ-2 is connected with the voltage monitoring relay normally open contact iHSJ-1 and the second end of the manual closing and opening switching handle iKK respectively, and the other end of the voltage monitoring relay normally open contact iHSJ-1 and the second end of the manual closing and opening switching handle iKK are connected with the positive pole of the power module, and the first manual switching switch QK is connected in parallel with the closing relay iHJ. i The other end of the closing relay auxiliary contact iHJ-2 is connected with the voltage monitoring relay normally open contact iHSJ-1 and the second end of the manual closing and opening switching handle iKK respectively, and the other end of the voltage monitoring relay normally open contact iHSJ-1 and the second end of the manual closing and opening switching handle iKK are connected with the positive pole of the power module, and the first manual switching switch QK is connected in parallel with the closing relay iHJ.

[0043] In operation, the closing relay iHJ and the tripping relay iTJ are powered through the voltage monitoring relay normally open contact iHSJ-1 and the voltage monitoring relay normally open contact iTSJ-1, respectively, and are continuously turned on through the self-holding loop (i=1, 2, 3). When the manual switching switch QK is pulled open during the verification of the backup automatic switching device, the closing loop and the tripping loop have the interlocking function. When the manual switching switch QK is closed during the verification of the tripping matrix, the situation of the multiple outlet pressure plates can be monitored simultaneously, and the correctness of the outlet loop of the tripping matrix is verified. Meanwhile, the module provides power supply for the voltage monitoring relays iHSJ and iTSJ, and the time relays 1SJ and 2SJ.

[0044] (3) Voltage monitoring module.

[0045] In this embodiment, the voltage monitoring module includes three groups of voltage detection loops, Figure 1 only one group of voltage detection loops is shown, and each group of voltage detection loops includes two voltage monitoring relay voltage monitoring contacts.

[0046] Specifically, the voltage detection loop includes the voltage monitoring relay iHSJ, the voltage monitoring relay iTSJ, the voltage monitoring relay voltage monitoring contact i g1, the voltage monitoring relay voltage monitoring contact i g2, and the second detection terminal g0, the voltage monitoring relay voltage monitoring contact i g1 is connected to the front panel of the backup automatic switching device through a test line at one end, the voltage monitoring relay voltage monitoring contact i g1 is connected to the voltage monitoring relay iHSJ at the other end, the voltage monitoring relay iHSJ is connected to the voltage monitoring relay iTSJ at the other end, and the voltage monitoring relay iTSJ is connected to the voltage monitoring relay voltage monitoring contact i g2 at one end, the voltage monitoring relay voltage monitoring contact i g2 is connected to the front panel of the backup automatic switching device through a test line at the other end, the second detection terminal g0 is grounded at one end, and the second detection terminal g0 is connected to the voltage monitoring relay iTSJ at the other end.

[0047] In operation, when the backup automatic switching device is activated, the corresponding outlet contact in the backup automatic switching CPU board is closed. After the voltage monitoring relay detects the potential change at the “2” end of the corresponding outlet pressure plate, the voltage monitoring relay auxiliary contact is activated, the tripping relay iTJ and the closing relay iHJ of the control module are powered, and the correctness of the backup automatic switching device activation logic and the outlet loop is verified.

[0048] (4) Switching quantity input module.

[0049] The switch quantity input module includes a tripping relay auxiliary contact iTJ-4, a closing relay auxiliary contact iHJ-4, a pressing plate iBS, a terminal ik1, a terminal ik2, a terminal ik3 and a terminal k0, the terminal is an access terminal of a test line. One end of the closing relay auxiliary contact iHJ-4 is connected with the terminal ik1, the other end of the closing relay auxiliary contact iHJ-4 is connected with one end of the tripping relay auxiliary contact iTJ-4, and the terminal ik1 is connected with the rear terminal row of the backup power supply device through the test line; the other end of the tripping relay auxiliary contact iTJ-4 is connected with the terminal ik2, and the terminal ik2 is connected with the rear terminal row of the backup power supply device through the test line; one end of the pressing plate iBS is connected with one end of the tripping relay auxiliary contact iTJ-4 and the terminal k0, and the terminal k0 is connected with a common terminal; the other end of the pressing plate iBS is connected with the terminal ik3, and the terminal ik3 is connected with the rear terminal row of the backup power supply device through the test line.

[0050] When the control module is in action, the switch quantity input module provides the switch quantity input quantity and the blocking backup power supply input quantity information required in the protection action process of the backup power supply device in the interval i, and thus the function verification of the backup power supply device is realized.

[0051] Based on the above structure and working process, the substation relay protection auxiliary verification device provided in the embodiment has the following beneficial effects:

[0052] 1. The device provided in the embodiment is low in cost, can simulate the closing and opening actions of two incoming line intervals and one bus interval circuit breaker, and provides corresponding switch quantity inputs such as circuit breaker positions and post-closing positions to the backup power supply device, and makes corresponding responses according to the action of the backup power supply device, and automatically feeds back the corresponding circuit breaker positions and switch quantity input switching information to the backup power supply device, thereby optimizing the allocation of human resources and improving the safety of operation.

[0053] 2. When the device provided in the embodiment is used for verification, the correctness of the outlet loop is verified by the first actual action outlet, and then the action of the electrical quantity protection tripping matrix is determined by measuring the potentials of all pressing plates, and the positive potential of the outlet pressing plate before and after the non-electrical quantity protection is detected to judge, thereby effectively reducing the number of times of manually closing the circuit breaker and observing the actual action of the circuit breaker and the input quantity, reducing the labor input of the workers and reducing the labor intensity of the workers.

[0054] 3. The device provided in the embodiment adopts a self-holding loop, which is convenient for observing the pulse condition of the instantaneous action of the outlet matrix.

[0055] Embodiment Two

[0056] The embodiment provides a substation relay protection auxiliary checking device which is further optimized on the basis of the first embodiment.

[0057] The spare power automatic switching device is a kind of safety automatic device which can put the spare power into operation to make the substation continue to run when the power system fails to work.

[0058] During the inspection of the spare power automatic switching device, the transmission test of at most two incoming line intervals, one bus interval circuit breaker and switch quantity input information is involved, and the operation and inspection personnel need to frequently go back and forth between the protection devices and the switch mechanisms during the test, the actual action of the circuit breakers in each interval and the influence of various switch quantity input conditions on the action of the spare power automatic switching device need to be checked after the test, and the next test needs to manually switch a plurality of circuit breakers. In addition, during the traditional inspection of the spare power automatic switching device, the two incoming line intervals and the bus interval cannot be in the maintenance state, therefore, the related input information needs to be artificially short-circuited, the professional quality of the personnel is required to be high during the short-circuiting, and a failure in the short-circuiting may cause a test failure or even a serious consequence such as direct current grounding. The present application simulates the operation boxes of the circuit breakers in the three intervals, supports providing all the input information required by each interval, and completely replaces the artificial short-circuiting function with the actual outlet displacement of the spare power automatic switching device.

[0059] During the transformer protection tripping matrix inspection process, the transmission test of multiple interval circuit breakers and input information is involved, and the operation and inspection personnel need to frequently operate on the protection screen and the measurement and control screen during the test, the circuit breakers on the two sides of the main transformer, the bus interval circuit breakers and the input information of the spare power automatic switching device need to be checked after the test, and a plurality of circuit breakers need to be manually switched before the next test. Due to the problems of a large number of test items, a large number of circuit breakers, a long distance between the measurement and control screen and the protection screen and an insufficient number of operation and inspection personnel, the test time is too long, and the equipment maintenance and decommissioning time are affected.

[0060] In order to effectively respond to the above situation, the present application provides a substation relay protection auxiliary checking device, by means of which, the "1+N" tripping matrix detection method can be used to replace the traditional method in which each time limit needs to be transmitted, that is, the correctness of each outlet loop is verified by actual transmission for the first time, and then the correctness of the outlet loop of the tripping matrix is verified by simultaneously monitoring the potential of the pressure plate, the test method is optimized, the number of times of manually switching the circuit breakers and checking the actual positions of the circuit breakers is greatly reduced, and the equipment decommissioning time is shortened.

[0061] In the present application, the substation relay protection auxiliary checking device comprises a control module 1, a voltage monitoring module 2, a switch quantity input module 3, a power module 4 and a timing module, the voltage monitoring module is connected with the control module, the switch quantity input module is connected with the control module, the power module is connected with the control module, and the timing module is connected with the control module.

[0062] Specifically:

[0063] (1) Power module.

[0064] In order to avoid the impact of frequent transfer of work site and re-connection of power supply when the number of intervals to be inspected is large, the mobile power supply is configured in the embodiment. The mobile power supply includes a rectifier device, a storage battery, a power supply monitoring screen, an AC power supply main switch AK, a charging air switch 1DK, a storage battery DC output switch 2DK, and a bypass power supply switch 3DK. The power supply monitoring screen displays the battery capacity and output voltage in real time. In the normal operation mode, 2DK is closed to realize direct power supply of the storage battery. When the storage battery fails, the bypass power supply mode of closing AK and 3DK can be used to directly supply power to the device, thereby increasing the reliability of power supply. The output power interlocking function is realized through the auxiliary contact points 2DK-1 and 3DK-1 of the air switch.

[0065] (2) Control module.

[0066] The control module includes three interval analog operation boards. The closing relays iHJ and the tripping relays iTJ are respectively powered through the voltage monitoring relay normally open contact points iHSJ-1 and iTSJ-1, and are continuously turned on through their self-holding circuits (i=1, 2, 3). Among them, taking the voltage monitoring relay normally open contact point iHSJ as an example, when the voltage monitoring relay normally open contact point iHSJ is powered by the voltage monitoring relay, its normally open auxiliary contact point iHSJ-1 is closed, the closing relay iHJ is powered and operated, and its normally open auxiliary contact point iHJ-2 is closed and operated, so that the closing relay iHJ is always powered.

[0067] When the manual switching switch QK is pulled out, the closing circuit and the tripping circuit have interlocking function. When the manual switching switch QK is closed, the potential of the multiple outlet pressure plates can be monitored at the same time to verify the correctness of the outlet circuit of the tripping matrix. At the same time, the module provides power supply for the voltage monitoring relays iHSJ and iTSJ, and the time relays 1SJ and 2SJ.

[0068] (3) Voltage detection module.

[0069] The voltage detection module in the embodiment includes 3 groups of voltage detection circuits, 6 voltage monitoring relay voltage monitoring contacts ig1, ig2 (i=1, 2, 3), and the voltage of the "2" end of the exit pressure plate of the spare self-switching device interval i is detected. When the spare self-switching device acts, the corresponding outlet contact in the spare self-switching CPU board will be closed, and after the voltage monitoring relay detects the potential change of the "2" end of the corresponding outlet pressure plate, the voltage monitoring relay auxiliary contact acts, the auxiliary verification device is powered on, and the correctness of the spare self-switching device action logic and the outlet circuit is verified.

[0070] To meet the voltage monitoring of the maximum outlet circuit number of the main transformer protection tripping matrix, the voltage detection circuit can also be expanded to three groups, that is, the total number of voltage monitoring relays is expanded to 8. Similarly, when verifying the main transformer protection tripping matrix, the auxiliary verification device is connected to the corresponding outlet pressure plate "2" end of the protection screen through the test line. When the tripping matrix corresponding time limit acts, the corresponding outlet contact is closed, so that the positive potential of the outlet pressure plate can be detected at the same time, and the outlet matrix logic correctness is determined through the outlet indicator. For the non-electric quantity protection of the main transformer, each voltage monitoring relay monitoring contact is connected to a non-electric quantity outlet pressure plate of the corresponding protection screen, and the positive potential of the outlet pressure plate of the main transformer on each side cannot be detected before the function pressure plate is put in, and the positive potential is detected after the function pressure plate is put in. The non-electric quantity protection outlet circuit is judged.

[0071] (4) Switching quantity input module.

[0072] When the control module acts, the switching quantity input module provides the switching quantity input required in the protection action process of interval i of the spare self-switching device and the blocking spare self-switching input information, so as to realize the function verification of the spare self-switching device. ik1 and k0 represent the access terminals of the test line.

[0073] (5) Timing module.

[0074] The timing module includes 4 groups of timing units (the number of timing units corresponds to the number of interval simulation operation boards and voltage detection circuits one by one), such as Figure 2As shown, only a set of timing units is shown, each set of timing units includes a first timer T, a second timer T and a timing starting module, the timing starting module includes a tripping relay auxiliary contact iTJ-5, a closing relay auxiliary contact iHJ-5, a first operation button SA, a second operation button SA and a first debugging device, a second debugging device, the two ends of the first debugging device are connected to the two ends of the first operation button SA through test lines, the two ends of the first debugging device are connected to the first foot and the second foot of the first timer T through test lines, the third foot of the first timer T is connected to one end of the closing relay auxiliary contact iHJ-5, and the other end of the closing relay auxiliary contact iHJ-5 is connected to the fourth foot of the first timer T; the two ends of the second debugging device are connected to the two ends of the second operation button SA through test lines, the two ends of the second debugging device are connected to the first foot and the second foot of the second timer T through test lines, the third foot of the second timer T is connected to one end of the tripping relay auxiliary contact iTJ-5, and the other end of the tripping relay auxiliary contact iTJ-5 is connected to the fourth foot of the first timer T.

[0075] In the embodiment, the timing module includes eight timers, when the analog quantity checking instrument acts, the timers start timing, and the action time of the auxiliary checking device tripping and closing loop when the backup power transfer device / main transformer protection acts can be recorded. There are two kinds of timer starting modes, one is to manually close the operation button SA, and the other is to open the contact through the debugging device (applied analog quantity device). As long as the debugging device applies analog quantity, the contact acts, and the timer starts timing. Finally, the tripping relay auxiliary contact iTJ-5 / closing relay auxiliary contact iHJ-5 acts to stop the timer.

[0076] The device provided in the embodiment can be further provided with eight groups of voltage detection loops on the basis of the first embodiment, so as to meet the maximum loop demand of the tripping matrix, and a self-holding loop is used, so as to facilitate observation of the pulse condition of the instantaneous action of the outlet matrix.

[0077] Embodiment three:

[0078] The embodiment provides a substation relay protection auxiliary checking device, which is operated in a specific application scenario on the basis of the first embodiment.

[0079] The switch quantity input of the backup power automatic throw-in device relates to the information of incoming line switches, bridge switch positions TWJ, KKJ, transformer protection actions, etc. In the debugging process of the backup power automatic throw-in device, the switch quantity input needs to be changed according to four backup power automatic throw-in modes and the actual operation state of the maintenance interval equipment to realize the backup power automatic throw-in verification process and drive the maintenance interval circuit breaker. In the actual verification process, the two-way incoming line switches and the busbar switch cannot be stopped all the time, and the maintenance work of the related outage interval equipment cannot be carried out at the same time as the backup power automatic throw-in device verification. In the backup power automatic throw-in device verification process, the correctness of the logic output needs to be tested by artificially short-circuiting the related circuit breaker position and other input quantities, which needs the cooperation of multiple people and has a low success rate, is easy to cause repeated tests, and has a high requirement on the skill level of the test personnel.

[0080] Taking the main transformer protection as an example, the main transformer debugging mainly includes electrical quantity debugging and non-electrical quantity debugging. The main transformer electrical quantity protection tripping matrix verification needs to drive the main transformer each side circuit breaker, busbar circuit breaker, and check the backup power automatic throw-in device input quantity information, which involves up to 8 outlet loop verifications. The electrical quantity protection tripping matrix verification items are many, the tripping matrix each time limit outlet mode is different, and each time the drive needs to check the related circuit breaker actual position and input quantity information in different intervals, and multiple circuit breakers need to be manually closed before the next drive. The main transformer non-electrical quantity protection tripping loop needs to verify the uniqueness of the non-electrical quantity function pad and the outlet pad. The traditional verification method is to only input the outlet pad or the function pad after the non-electrical quantity protection acts, the circuit breaker does not act, the backup power automatic throw-in device input quantity signal does not export, and the circuit breaker acts when the function pad and the outlet pad are input at the same time, and the backup power automatic throw-in device receives the input quantity information.

[0081] Therefore, the application provides a substation relay protection auxiliary verification device which can simplify the backup power automatic throw-in and transformer protection drive test process, accurately and quickly verify the tripping matrix outlet loop, shorten the protection debugging time, and improve the work efficiency.

[0082] Specifically, a substation relay protection auxiliary verification device includes a control module 1, a voltage monitoring module 2, a switch quantity input module 3, a power module 4, and a timing module. The voltage monitoring module is connected with the control module, the switch quantity input module is connected with the control module, the power module is connected with the control module, and the timing module is connected with the control module.

[0083] (1) Power module.

[0084] In order to avoid the influence caused by the frequent transfer of work sites and the reconnection of power supply when the number of intervals to be tested is large, the rapid verification device is configured with a mobile power supply in the embodiment.

[0085] The mobile power supply comprises a rectifier, a battery, a power supply monitoring screen, an AC power supply master switch AK, a charging air switch 1DK, and a battery DC output switch 2DK. The power supply monitoring screen displays the battery capacity and output voltage in real time. In a normal operation mode, the battery DC output switch 2DK is closed, and the other switches are opened to realize direct battery power supply; when the battery fails, the AC power supply master switch AK and the bypass power supply switch 3DK are closed, and the other switches are opened to realize bypass power supply mode to directly supply power to the rapid inspection device, thereby increasing the power supply reliability.

[0086] As shown in Figure 3 In this embodiment, the rectifier comprises a transformer and a rectifier bridge, the input end of the transformer is connected to the commercial power supply, and the output end of the transformer is connected to the rectifier bridge. The rectifier is used to convert AC power into DC power to charge the battery or provide working power for the monitoring module and the voltage monitoring module when the battery fails. In other embodiments, the rectifier can also adopt different circuit structures.

[0087] The structures and functions of the other modules are the same as those of the modules in Embodiment 1.

[0088] The traditional trip matrix verification needs to complete the outlet transmission for each action time limit, but the present application adopts a "1+N" verification method, that is, the correctness of all outlet loops is judged by using the actual outlet for the first time, then the outlet pressing plate is removed, the "2" end of the outlet pressing plate is connected to positive electricity after the action of the corresponding outlet contact point of the outlet matrix, and the correctness of the trip matrix is accurately judged by the lighting of the corresponding outlet indicator of the device.

[0089] The above-described embodiments are only a preferred scheme of the present application, and do not limit the present application in any form, and other variants and modifications can be made without exceeding the technical scheme recorded in the claims.

Claims

1. A substation relay protection auxiliary check device, characterized in that, The utility model provides an automatic switching device test platform, including power module, control module is connected with power module, voltage monitoring module and switching value input module are connected with control module, voltage monitoring module includes a plurality of groups of mutually parallel voltage detection circuit, voltage detection circuit includes voltage monitoring relay monitoring contact, voltage monitoring relay monitoring contact is connected through test line measured device's export pressure plate.

2. The device for auxiliary check of relay protection of a substation according to claim 1, characterized in that, The control module includes an interval analog operating board, the interval analog operating board includes a closing module and a tripping module connected through an intermediate relay, the closing module and the tripping module are connected with the power module, the tripping module is connected with a voltage monitoring relay in parallel, and the voltage monitoring relay is connected with an indication module in parallel.

3. The device for auxiliary check of relay protection of a substation according to claim 2, characterized in that, The interval analog operating board includes a closing time relay and an opening time relay, and the closing time relay and the opening time relay are connected with the power module.

4. The device for auxiliary check of relay protection of a substation according to claim 1, characterized in that, The switching value input module includes a tripping relay auxiliary contact iTJ-4 and a closing relay auxiliary contact iHJ-4, and the tripping relay auxiliary contact iTJ-4 and the closing relay auxiliary contact iHJ-4 are connected with the rear terminal row of the measured backup device.

5. The auxiliary checking device for relay protection of a substation according to claim 1 or 2 or 3 or 4, characterized in that, Further comprising a timing module, the timing module comprises a plurality of timing units, each timing unit comprises a timer and a timing start module connected with the timer.

6. The auxiliary checking device for relay protection of a substation according to claim 1 or 2 or 3 or 4, characterized in that, The power module comprises a rectifier device and a storage battery, the rectifier device is connected with the mains, the rectifier device is connected with the storage battery through a charging air switch, and the storage battery is connected with the control module through a storage battery DC output switch.

7. The device for auxiliary check of relay protection of a substation according to claim 2 or 3, characterized in that, The closing module includes a closing relay, one end of the closing relay is connected with the negative pole of the power module, the other end of the closing relay is connected with one end of a tripping relay auxiliary contact iTJ-2, a first manual switch is connected in parallel with the tripping relay auxiliary contact iTJ-2, the other end of the tripping relay auxiliary contact iTJ-2 is connected with an intermediate relay, and the other end of the tripping relay auxiliary contact iTJ-2 is connected with the positive pole of the power module.

8. The device for auxiliary check of relay protection of a substation according to claim 5, characterized in that, The timing start module includes a first timer and a second timer, the first timer is connected with a first debugging device on-off contact, the first timer is connected in parallel with a first operation button, and the first timer is connected with a closing relay auxiliary contact iHJ-5; the second timer is connected with a first debugging device, the second timer is connected in parallel with a second operation button, and the second timer is connected with a tripping relay auxiliary contact iTJ-5.

9. The device for auxiliary check of relay protection of a substation according to claim 2 or 3, characterized in that, The tripping module includes a tripping relay, one end of the tripping relay is connected with the negative pole of the power module, the other end of the tripping relay is connected with one end of a closing relay auxiliary contact iHJ-2, a second manual switch is connected in parallel with the closing relay auxiliary contact iHJ-2, the other end of the closing relay auxiliary contact iHJ-2 is connected with a tripping relay auxiliary contact iTJ-1 and a tripping monitoring relay auxiliary contact iTSJ-1 respectively, and the other end of the closing relay auxiliary contact iHJ-2 is connected with the positive pole of the power module.

10. The device for auxiliary check of relay protection of a substation according to claim 6, characterized in that, The power module further comprises a bypass power switch, one end of the bypass power switch being connected with the rectifier device, and the other end of the bypass power switch being connected with the control module.

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