An online monitoring method and system for the integrity of a relay protection export circuit

Abstract

The present invention relates to the technical field of monitoring relay protection devices, and discloses an online monitoring method and system for the integrity of the relay protection export circuit. The method obtains the operation information of the export circuit of the relay protection device, and monitors the power-on situation of the positive power supply of the export circuit of the relay protection device, the correctness of the export message, and the connection state of the control circuit according to the operation information to obtain corresponding monitoring results, so as to fully monitor the integrity of the export circuit of the relay protection device, avoid blind spots in the online monitoring of the export circuit of the relay protection device, and reduce the risks of missed or incorrect power-on of the relay protection device.

Description

Technical Field

[0001] The present invention relates to the technical field of relay protection device monitoring, and particularly relates to an online monitoring method and system for the integrity of a relay protection export circuit. Background Art

[0002] Currently, due to the requirements of the safe operation of relay protection, it is prohibited to perform online monitoring on the export circuit by adding a parasitic circuit to the relay protection export circuit.

[0003] Currently, the relay protection device collects the trip position relay and the closing position relay in real time to initially monitor the integrity of the circuit. When the power supply of the control circuit is lost or the normally open and normally closed nodes of DL are abnormal, the protection device reports an alarm of a control circuit disconnection. However, when a control circuit disconnection occurs, the specific abnormal cause cannot be given, and there are still blind spots in the monitoring of the relay protection device export circuit. The position of the export pressure plate cannot be monitored and is in a blind spot, and situations such as missed insertion and misinsertion often occur in on-site operation, resulting in the refusal or misoperation of the relay protection device and causing serious power grid accidents.

[0004] When the export pressure plate needs to be reinserted after being withdrawn, considering the adhesion problem of the export relay of the protection device, the operating personnel need to measure the ground voltages of the upper and lower terminals of the export pressure plate. The voltage of the upper terminal of the export pressure plate varies with the circuit and the breaker position, and the operating personnel need to have certain experience to distinguish. During the measurement with a multimeter, the upper terminal of the export pressure plate is grounded to the export circuit, and improper operation is likely to cause the capacitive element in the circuit to discharge, resulting in a misoperation of the export circuit and causing serious power grid accidents.

[0005] In summary, there are still blind spots in the current online monitoring of the export circuit of the relay protection device, which is likely to cause situations such as missed insertion and misinsertion of the relay protection device and cause serious power grid accidents. Summary of the Invention

[0006] The present invention provides an online monitoring method and system for the integrity of a relay protection export circuit, which solves the technical problem that there are still blind spots in the current online monitoring of the export circuit of the relay protection device, which is likely to cause situations such as missed insertion and misinsertion of the relay protection device.

[0007] In view of this, the first aspect of the present invention provides an online monitoring method for the integrity of a relay protection export circuit, including the following steps:

[0008] S1. Obtain the operation information of the export circuit of the relay protection device, where the operation information includes the static electric field polarity of the lower terminal of the trip circuit export pressure plate, the insertion / withdrawal state of the trip circuit export pressure plate, the static electric field polarity of the lower terminal of the closing circuit export pressure plate, the insertion / withdrawal state of the closing circuit export pressure plate, and the opening / closing position of the circuit breaker;

[0009] S2. When the relay protection device is in normal operation, monitor the energization status of the positive power supply of the outlet circuit of the relay protection device according to the operation information of the outlet circuit of the relay protection device, and obtain the corresponding monitoring result of the energization of the positive power supply;

[0010] S3. Monitor the correctness of the outlet message of the relay protection device according to the operation information of the outlet circuit of the relay protection device, and obtain the corresponding monitoring result of the correctness of the outlet message;

[0011] S4. Monitor the connection status of the control circuit of the circuit breaker according to the operation information of the outlet circuit of the relay protection device, and obtain the corresponding monitoring result of the connection status of the control circuit of the circuit breaker.

[0012] Preferably, step S2 specifically includes:

[0013] S201. When the relay protection device is in normal operation, identify the opening and closing position of the circuit breaker. When the opening and closing position of the circuit breaker is in the closed state, execute step S202. When the opening and closing position of the circuit breaker is in the open state, execute step S203;

[0014] S202. When the closing outlet pressure plate is in the energized state and the static electric field polarity of the lower terminal of the closing circuit outlet pressure plate is positive, if it is detected that the static electric field polarity of the lower terminal of the closing circuit outlet pressure plate changes from positive to non-polar, it is determined that the energization of the positive power supply of the outlet circuit of the relay protection device fails;

[0015] S203. When the opening and closing position of the circuit breaker is in the open state, the tripping outlet pressure plate is in the energized state, and the static electric field polarity of the lower terminal of the tripping circuit outlet pressure plate is positive, if it is detected that the static electric field polarity of the lower terminal of the tripping circuit outlet pressure plate changes from positive to non-polar, it is determined that the energization of the positive power supply of the outlet circuit of the relay protection device fails.

[0016] Preferably, step S3 specifically includes:

[0017] Identify the static electric field polarity of the lower terminal of the tripping circuit outlet pressure plate according to the opening and closing position of the circuit breaker and the withdrawal and insertion status of the tripping circuit outlet pressure plate, and judge whether the static electric field polarity of the lower terminal of the tripping circuit outlet pressure plate is consistent with the outlet message of the relay protection device. If it is judged that the static electric field polarity of the lower terminal of the tripping circuit outlet pressure plate is consistent with the outlet message of the relay protection device, it is determined that the outlet message of the relay protection device is correct. If it is judged that the static electric field polarity of the lower terminal of the tripping circuit outlet pressure plate is inconsistent with the outlet message of the relay protection device, the outlet message of the relay protection device is incorrect;

[0018] Identify the polarity of the static electric field at the lower terminal of the closing loop outlet pressure plate according to the on / off position of the circuit breaker and the on / off state of the closing loop outlet pressure plate, and determine whether the polarity of the static electric field at the lower terminal of the closing loop outlet pressure plate is consistent with the outlet message of the relay protection device. If it is determined that the polarity of the static electric field at the lower terminal of the closing loop outlet pressure plate is consistent with the outlet message of the relay protection device, it is determined that the outlet message of the relay protection device is correct. If it is determined that the polarity of the static electric field at the lower terminal of the closing loop outlet pressure plate is inconsistent with the outlet message of the relay protection device, the outlet message of the relay protection device is incorrect.

[0019] Preferably, step S4 specifically includes:

[0020] When the on / off position of the circuit breaker is in the closed state, if the trip outlet pressure plate is in the on state and the polarity of the static electric field at the lower terminal of the trip loop outlet pressure plate changes from negative to positive, it is determined that the connection state of the control loop of the circuit breaker is interrupted;

[0021] When the on / off position of the circuit breaker is in the open state, if the closing outlet pressure plate is in the on state and the polarity of the static electric field at the lower terminal of the closing loop outlet pressure plate changes from negative to positive, it is determined that the connection state of the control loop of the circuit breaker is interrupted.

[0022] Preferably, the present invention further includes:

[0023] S5. Obtain the monitoring results of the positive power supply input, the monitoring results of the correctness of the outlet message, and the monitoring results of the connection state of the control loop of the circuit breaker, and determine whether the monitoring results of the positive power supply input, the monitoring results of the correctness of the outlet message, and / or the monitoring results of the connection state of the control loop of the circuit breaker are abnormal. If it is determined that the monitoring results of the positive power supply input, the monitoring results of the correctness of the outlet message, and / or the monitoring results of the connection state of the control loop of the circuit breaker are abnormal, an alarm is issued.

[0024] In a second aspect, the present invention provides an on-line monitoring system for the integrity of the relay protection outlet loop, including:

[0025] An information acquisition module for acquiring the operation information of the outlet loop of the relay protection device, where the operation information includes the polarity of the static electric field at the lower terminal of the trip loop outlet pressure plate, the on / off state of the trip loop outlet pressure plate, the polarity of the static electric field at the lower terminal of the closing loop outlet pressure plate, the on / off state of the closing loop outlet pressure plate, and the on / off position of the circuit breaker;

[0026] A first monitoring module for monitoring the input of the positive power supply of the outlet loop of the relay protection device according to the operation information of the outlet loop of the relay protection device during the normal operation of the relay protection device, and obtaining the corresponding monitoring results of the positive power supply input;

[0027] The second monitoring module is used to monitor the correctness of the export message of the relay protection device according to the operation information of the export circuit of the electrical protection device, and obtain the monitoring result of the correctness of the corresponding export message;

[0028] The third monitoring module is used to monitor the connection state of the control circuit of the circuit breaker according to the operation information of the export circuit of the electrical protection device, and obtain the monitoring result of the connection state of the control circuit of the corresponding circuit breaker.

[0029] Preferably, the first monitoring module specifically includes:

[0030] The circuit breaker state identification module is used to identify the opening and closing position of the circuit breaker when the relay protection device is in normal operation. When the opening and closing position of the circuit breaker is in the closing state, it sends a working signal to the first positive power supply monitoring module. When the opening and closing position of the circuit breaker is in the opening state, it sends a working signal to the second positive power supply monitoring module;

[0031] The first positive power supply monitoring module is used to determine that the input of the positive power supply of the export circuit of the relay protection device fails when the closing export pressure plate is in the input state and the static electric field polarity of the lower pile of the closing circuit export pressure plate is positive, and if it is detected that the static electric field polarity of the lower pile of the closing circuit export pressure plate changes from positive to non-polar;

[0032] The second positive power supply monitoring module is used to determine that the input of the positive power supply of the export circuit of the relay protection device fails when the opening and closing position of the circuit breaker is in the opening state, the tripping export pressure plate is in the input state, and the static electric field polarity of the lower pile of the tripping circuit export pressure plate is positive, and if it is detected that the static electric field polarity of the lower pile of the tripping circuit export pressure plate changes from positive to non-polar.

[0033] Preferably, the second monitoring module specifically includes:

[0034] The first message monitoring module is used to identify the static electric field polarity of the lower pile of the tripping circuit export pressure plate according to the opening and closing position of the circuit breaker and the input and output state of the tripping circuit export pressure plate, and judge whether the static electric field polarity of the lower pile of the tripping circuit export pressure plate is consistent with the export message of the relay protection device. If it is judged that the static electric field polarity of the lower pile of the tripping circuit export pressure plate is consistent with the export message of the relay protection device, it is determined that the export message of the relay protection device is correct. If it is judged that the static electric field polarity of the lower pile of the tripping circuit export pressure plate is inconsistent with the export message of the relay protection device, the export message of the relay protection device is incorrect;

[0035] The second message monitoring module is used to identify the static electric field polarity of the lower terminal of the closing loop outlet pressure plate according to the opening and closing position of the circuit breaker and the switching state of the closing loop outlet pressure plate, and judge whether the static electric field polarity of the lower terminal of the closing loop outlet pressure plate is consistent with the outlet message of the relay protection device. If it is judged that the static electric field polarity of the lower terminal of the closing loop outlet pressure plate is consistent with the outlet message of the relay protection device, it is determined that the outlet message of the relay protection device is correct. If it is judged that the static electric field polarity of the lower terminal of the closing loop outlet pressure plate is inconsistent with the outlet message of the relay protection device, the outlet message of the relay protection device is incorrect.

[0036] Preferably, the third monitoring module specifically includes:

[0037] The first connection state monitoring module is used to determine that the connection state of the control loop of the circuit breaker is interrupted when the opening and closing position of the circuit breaker is in the closing state, if the trip outlet pressure plate is in the input state and the static electric field polarity of the lower terminal of the trip loop outlet pressure plate changes from negative to positive;

[0038] The second connection state monitoring module is used to determine that the connection state of the control loop of the circuit breaker is interrupted when the opening and closing position of the circuit breaker is in the opening state, if the closing outlet pressure plate is in the input state and the static electric field polarity of the lower terminal of the closing loop outlet pressure plate changes from negative to positive.

[0039] Preferably, the system further includes:

[0040] The alarm module is used to obtain the monitoring results of the positive power supply input, the correctness of the outlet message, and the connection state monitoring result of the control loop of the circuit breaker, and judge whether the monitoring results of the positive power supply input, the correctness of the outlet message, and / or the connection state monitoring result of the control loop of the circuit breaker are abnormal. If it is judged that the monitoring results of the positive power supply input, the correctness of the outlet message, and / or the connection state monitoring result of the control loop of the circuit breaker are abnormal, an alarm is issued.

[0041] From the above technical solutions, it can be seen that the present invention has the following advantages:

[0042] The present invention obtains the operation information of the outlet loop of the relay protection device, and monitors the positive power supply input, the correctness of the outlet message, and the connection state of the control loop of the outlet loop of the relay protection device according to the operation information, and obtains the corresponding monitoring results, so as to fully monitor the integrity of the outlet loop of the relay protection device, avoid blind spots in the online monitoring of the outlet loop of the relay protection device, and reduce the risk of missed or incorrect input of the relay protection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a flowchart of an online monitoring method for the integrity of the relay protection outlet loop provided by an embodiment of the present invention;

[0044] Figure 2 It is the circuit diagram of the outlet circuit of the relay protection device provided by the embodiment of the present invention;

[0045] Figure 3 It is the structural schematic diagram of an on-line monitoring system for the integrity of the relay protection outlet circuit provided by the embodiment of the present invention. Specific embodiments

[0046] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0047] For ease of understanding, please refer to Figure 1 , an on-line monitoring method for the integrity of the relay protection outlet circuit provided by the present invention includes the following steps:

[0048] S1. Obtain the operation information of the outlet circuit of the relay protection device, where the operation information includes the static electric field polarity of the lower terminal of the trip circuit outlet pressure plate, the on / off state of the trip circuit outlet pressure plate, the static electric field polarity of the lower terminal of the closing circuit outlet pressure plate, the on / off state of the closing circuit outlet pressure plate, and the opening / closing position of the circuit breaker.

[0049] Among them, as Figure 2 shown, Figure 2 schematically shows the circuit diagram of the outlet circuit of the relay protection device, and the operation information of the outlet circuit of the relay protection device is obtained by the relay protection outlet hard pressure plate monitoring system and the relay protection information system. The relay protection information system is composed of a master station system installed at the dispatching end, a sub-station system installed at the substation end, and a power communication network and interface equipment for information transmission, realizing the acquisition, processing, and analysis of the relay protection device information at the substation end, and being able to interact with other systems, enabling each professional of the relay protection to comprehensively, quickly, accurately, and intuitively master the operation status of the relay protection device.

[0050] The relay protection outlet hard pressure plate monitoring system is composed of an outlet pressure plate position sensor and corresponding data processing and external communication devices, and realizes the on-line monitoring of the relay protection outlet hard pressure plate position based on the direct current electric field real-time measurement method.

[0051] Among them, the static electric field polarity of the lower terminal of the trip / closing circuit outlet pressure plate includes positive, negative, and neutral, and the on / off state of the trip / closing circuit outlet pressure plate includes in and out.

[0052] S2. When the relay protection device is in normal operation, monitor the energization status of the positive power supply of the outlet circuit of the relay protection device based on the operation information of the outlet circuit of the relay protection device, and obtain the corresponding monitoring result of the energization of the positive power supply.

[0053] S3. Monitor the correctness of the outlet message of the relay protection device based on the operation information of the outlet circuit of the relay protection device, and obtain the corresponding monitoring result of the correctness of the outlet message;

[0054] S4. Monitor the connection status of the control circuit of the circuit breaker based on the operation information of the outlet circuit of the relay protection device, and obtain the corresponding monitoring result of the connection status of the control circuit of the circuit breaker.

[0055] Among them, through the information fusion of the relay protection information system and the online monitoring system of the outlet pressure plate, the integrity online monitoring of the relay protection outlet circuit is realized. At the same time, the number of sensors applied is the least, the cost is low, the engineering quantity is small, and it is easy to promote and apply.

[0056] This embodiment provides a method for online monitoring the integrity of the relay protection outlet circuit, which obtains the operation information of the outlet circuit of the relay protection device, and monitors the energization status of the positive power supply, the correctness of the outlet message, and the connection status of the control circuit of the outlet circuit of the relay protection device based on its operation information, and obtains the corresponding monitoring results, so as to fully monitor the integrity of the outlet circuit of the relay protection device, avoid blind spots in the online monitoring of the outlet circuit of the relay protection device, and reduce the risks of missed energization and mis-energization of the relay protection device.

[0057] In a specific embodiment, step S2 specifically includes:

[0058] S201. When the relay protection device is in normal operation, identify the opening and closing positions of the circuit breaker. When the opening and closing positions of the circuit breaker are in the closed state, execute step S202; when the opening and closing positions of the circuit breaker are in the open state, execute step S203;

[0059] S202. When the closing outlet pressure plate is in the energized state and the static electric field polarity of the lower terminal of the closing circuit outlet pressure plate is positive, if it is detected that the static electric field polarity of the lower terminal of the closing circuit outlet pressure plate changes from positive to non-polar, it is determined that the energization of the positive power supply of the outlet circuit of the relay protection device fails.

[0060] Among them, if it is detected that the static electric field polarity of the lower terminal of the closing circuit outlet pressure plate changes from positive to non-polar, it means that the charged state of the lower terminal of the closing circuit outlet pressure plate is non-polar, and it is determined that the energization of the positive power supply of the outlet circuit of the relay protection device fails.

[0061] S203. When the opening / closing position of the circuit breaker is in the open state, the trip outlet pressure plate is in the energized state, and the electrostatic field polarity of the lower terminal of the trip circuit outlet pressure plate is positive. If it is detected that the electrostatic field polarity of the lower terminal of the trip circuit outlet pressure plate changes from positive to non-polar, it is determined that the positive power supply input of the outlet circuit of the relay protection device fails.

[0062] Among them, if it is detected that the electrostatic field polarity of the lower terminal of the trip circuit outlet pressure plate changes from positive to non-polar, it means that the charged state of the lower terminal of the trip circuit outlet pressure plate is non-polar, and it is determined that the positive power supply input of the outlet circuit of the relay protection device fails.

[0063] In a specific embodiment, step S3 specifically includes:

[0064] S301. Identify the electrostatic field polarity of the lower terminal of the trip circuit outlet pressure plate according to the opening / closing position of the circuit breaker and the energization / de-energization state of the trip circuit outlet pressure plate, and determine whether the electrostatic field polarity of the lower terminal of the trip circuit outlet pressure plate is consistent with the outlet message of the relay protection device. If it is determined that the electrostatic field polarity of the lower terminal of the trip circuit outlet pressure plate is consistent with the outlet message of the relay protection device, it is determined that the outlet message of the relay protection device is correct. If it is determined that the electrostatic field polarity of the lower terminal of the trip circuit outlet pressure plate is inconsistent with the outlet message of the relay protection device, the outlet message of the relay protection device is incorrect;

[0065] S302. Identify the electrostatic field polarity of the lower terminal of the closing circuit outlet pressure plate according to the opening / closing position of the circuit breaker and the energization / de-energization state of the closing circuit outlet pressure plate, and determine whether the electrostatic field polarity of the lower terminal of the closing circuit outlet pressure plate is consistent with the outlet message of the relay protection device. If it is determined that the electrostatic field polarity of the lower terminal of the closing circuit outlet pressure plate is consistent with the outlet message of the relay protection device, it is determined that the outlet message of the relay protection device is correct. If it is determined that the electrostatic field polarity of the lower terminal of the closing circuit outlet pressure plate is inconsistent with the outlet message of the relay protection device, the outlet message of the relay protection device is incorrect.

[0066] In an example, according to the circuit breaker position information, a forward analysis method is adopted to check the correctness of the pressure plate position information sent by the outlet pressure plate monitoring system according to the actual position of the circuit breaker:

[0067] I. When the circuit breaker position is closed, it includes:

[0068] 1) When the trip outlet pressure plate is energized, the electrostatic field polarity of the lower terminal of the trip circuit outlet pressure plate should be negative. If the polarity sent by the outlet pressure plate monitoring system is negative, it is correct. If it is positive or non-polar, it is incorrect;

[0069] 2) When the trip outlet pressure plate is de-energized, the electrostatic field polarity of the lower terminal of the trip circuit outlet pressure plate should be non-polar. If the polarity sent by the outlet pressure plate monitoring system is non-polar, it is correct. If it is positive or negative, it is incorrect;

[0070] 3) When the closing outlet pressure plate is switched on, the static electric field polarity of the lower terminal of the closing loop outlet pressure plate should be positive. If the polarity sent by the outlet pressure plate monitoring system is positive, it is correct; if it is negative or there is no polarity, it is incorrect.

[0071] 4) When the closing outlet pressure plate is switched off, the static electric field polarity of the lower terminal of the closing loop outlet pressure plate should be without polarity. If the polarity sent by the outlet pressure plate monitoring system is without polarity, it is correct; if it is positive or negative, it is incorrect.

[0072] II. When the circuit breaker position is open, it includes:

[0073] 1) When the tripping outlet pressure plate is switched on, the static electric field polarity of the lower terminal of the tripping loop outlet pressure plate should be positive. If the polarity sent by the outlet pressure plate monitoring system is positive, it is correct; if it is negative or there is no polarity, it is incorrect.

[0074] 2) When the tripping outlet pressure plate is switched off, the static electric field polarity of the lower terminal of the tripping loop outlet pressure plate should be without polarity. If the polarity sent by the outlet pressure plate monitoring system is without polarity, it is correct; if it is positive or negative, it is incorrect.

[0075] 3) When the closing outlet pressure plate is switched on, the static electric field polarity of the lower terminal of the closing loop outlet pressure plate should be negative. If the polarity sent by the outlet pressure plate monitoring system is negative, it is correct; if it is positive or there is no polarity, it is incorrect.

[0076] 4) When the closing outlet pressure plate is switched off, the static electric field polarity of the lower terminal of the closing loop outlet pressure plate should be without polarity. If the polarity sent by the outlet pressure plate monitoring system is without polarity, it is correct; if it is positive or negative, it is incorrect.

[0077] In a specific embodiment, step S4 specifically includes:

[0078] S401. When the circuit breaker closing and opening position is in the closed state, if the tripping outlet pressure plate is in the switched-on state and the static electric field polarity of the lower terminal of the tripping loop outlet pressure plate changes from negative to positive, it is determined that the control loop connection state of the circuit breaker is interrupted.

[0079] S402. When the circuit breaker closing and opening position is in the open state, if the closing outlet pressure plate is in the switched-on state and the static electric field polarity of the lower terminal of the closing loop outlet pressure plate changes from negative to positive, it is determined that the control loop connection state of the circuit breaker is interrupted.

[0080] In a specific embodiment, this method further includes:

[0081] S5. Obtain the monitoring results of the positive power supply input, the correctness of the export message, and the monitoring results of the connection status of the breaker's control loop, and determine whether the monitoring results of the positive power supply input, the correctness of the export message, and / or the monitoring results of the connection status of the breaker's control loop are abnormal. If it is determined that the monitoring results of the positive power supply input, the correctness of the export message, and / or the monitoring results of the connection status of the breaker's control loop are abnormal, an alarm is issued.

[0082] The above is a detailed description of an embodiment of an online monitoring method for the integrity of a relay protection export loop provided by the present invention. The following is a detailed description of an embodiment of an online monitoring system for the integrity of a relay protection export loop provided by the present invention.

[0083] For ease of understanding, please refer to FIG. 3. The present invention provides an online monitoring system for the integrity of a relay protection export loop, including:

[0084] An information acquisition module 100, configured to acquire the operation information of the export loop of the relay protection device. The operation information includes the static electric field polarity of the lower terminal of the trip loop export pressure plate, the input and output state of the trip loop export pressure plate, the static electric field polarity of the lower terminal of the closing loop export pressure plate, the input and output state of the closing loop export pressure plate, and the opening and closing position of the breaker.

[0085] A first monitoring module 200, configured to monitor the input of the positive power supply of the export loop of the relay protection device according to the operation information of the export loop of the relay protection device during the normal operation of the relay protection device, and obtain the corresponding monitoring result of the positive power supply input.

[0086] A second monitoring module 300, configured to monitor the correctness of the export message of the relay protection device according to the operation information of the export loop of the relay protection device, and obtain the corresponding monitoring result of the correctness of the export message.

[0087] A third monitoring module 400, configured to monitor the connection status of the control loop of the breaker according to the operation information of the export loop of the relay protection device, and obtain the corresponding monitoring result of the connection status of the control loop of the breaker.

[0088] In a specific embodiment, the first monitoring module specifically includes:

[0089] A breaker status identification module, configured to identify the opening and closing position of the breaker during the normal operation of the relay protection device. When the opening and closing position of the breaker is in the closed state, a working signal is sent to the first positive power supply monitoring module. When the opening and closing position of the breaker is in the open state, a working signal is sent to the second positive power supply monitoring module.

[0090] The first positive power supply monitoring module is used to determine that the positive power supply input of the export circuit of the relay protection device fails when the closing outlet pressure plate is in the input state and the static electric field polarity of the lower pile of the closing circuit outlet pressure plate is positive, and if it is detected that the static electric field polarity of the lower pile of the closing circuit outlet pressure plate changes from positive to non-polar.

[0091] The second positive power supply monitoring module is used to determine that the positive power supply input of the export circuit of the relay protection device fails when the breaker opening / closing position is in the opening state, the tripping outlet pressure plate is in the input state, and the static electric field polarity of the lower pile of the tripping circuit outlet pressure plate is positive, and if it is detected that the static electric field polarity of the lower pile of the tripping circuit outlet pressure plate changes from positive to non-polar.

[0092] In a specific embodiment, the second monitoring module specifically includes:

[0093] The first message monitoring module is used to identify the static electric field polarity of the lower pile of the tripping circuit outlet pressure plate according to the breaker opening / closing position and the tripping circuit outlet pressure plate input / output state, and determine whether the static electric field polarity of the lower pile of the tripping circuit outlet pressure plate is consistent with the export message of the relay protection device. If it is determined that the static electric field polarity of the lower pile of the tripping circuit outlet pressure plate is consistent with the export message of the relay protection device, it is determined that the export message of the relay protection device is correct. If it is determined that the static electric field polarity of the lower pile of the tripping circuit outlet pressure plate is inconsistent with the export message of the relay protection device, the export message of the relay protection device is incorrect.

[0094] The second message monitoring module is used to identify the static electric field polarity of the lower pile of the closing circuit outlet pressure plate according to the breaker opening / closing position and the closing circuit outlet pressure plate input / output state, and determine whether the static electric field polarity of the lower pile of the closing circuit outlet pressure plate is consistent with the export message of the relay protection device. If it is determined that the static electric field polarity of the lower pile of the closing circuit outlet pressure plate is consistent with the export message of the relay protection device, it is determined that the export message of the relay protection device is correct. If it is determined that the static electric field polarity of the lower pile of the closing circuit outlet pressure plate is inconsistent with the export message of the relay protection device, the export message of the relay protection device is incorrect.

[0095] In a specific embodiment, the third monitoring module specifically includes:

[0096] The first connection state monitoring module is used to determine that the connection state of the breaker control circuit is interrupted when the breaker opening / closing position is in the closing state, the tripping outlet pressure plate is in the input state, and the static electric field polarity of the lower pile of the tripping circuit outlet pressure plate changes from negative to positive.

[0097] The second connection state monitoring module is used to determine that the connection state of the breaker control circuit is interrupted when the breaker opening / closing position is in the opening state, the closing outlet pressure plate is in the input state, and the static electric field polarity of the lower pile of the closing circuit outlet pressure plate changes from negative to positive.

[0098] In a specific embodiment, the system further includes:

[0099] An alarm module, configured to obtain the monitoring results of the positive power supply input, the monitoring results of the correctness of the export message, and the monitoring results of the connection status of the control loop of the circuit breaker, determine whether the monitoring results of the positive power supply input, the monitoring results of the correctness of the export message, and / or the monitoring results of the connection status of the control loop of the circuit breaker are abnormal, and if it is determined that the monitoring results of the positive power supply input, the monitoring results of the correctness of the export message, and / or the monitoring results of the connection status of the control loop of the circuit breaker are abnormal, an alarm is issued.

[0100] Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be elaborated herein.

[0101] In several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of devices or units can be in electrical, mechanical or other forms.

[0102] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place, or can be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0103] In addition, in each embodiment of the present invention, the functional units can be integrated in one processing unit, or each unit exists physically alone, or two or more units can be integrated in one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0104] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An online monitoring method for the integrity of a relay protection tripping circuit, characterized in that, Including the following steps: S1. Obtain the operation information of the outlet circuit of the relay protection device, where the operation information includes the static electric field polarity of the lower terminal of the trip circuit outlet pressure plate, the on / off state of the trip circuit outlet pressure plate, the static electric field polarity of the lower terminal of the closing circuit outlet pressure plate, the on / off state of the closing circuit outlet pressure plate, and the opening / closing position of the circuit breaker; S2. When the relay protection device is in normal operation, monitor the power supply input of the outlet circuit of the relay protection device according to the operation information of the outlet circuit of the relay protection device, and obtain the corresponding power supply input monitoring result, including: S201. When the relay protection device is in normal operation, identify the opening / closing position of the circuit breaker. When the opening / closing position of the circuit breaker is in the closed state, execute step S202. When the opening / closing position of the circuit breaker is in the open state, execute step S203; S202. When the closing outlet pressure plate is in the on state and the static electric field polarity of the lower terminal of the closing circuit outlet pressure plate is positive, if it is detected that the static electric field polarity of the lower terminal of the closing circuit outlet pressure plate changes from positive to non-polar, it is determined that the power supply input of the outlet circuit of the relay protection device fails; S203. When the opening / closing position of the circuit breaker is in the open state, the trip outlet pressure plate is in the on state, and the static electric field polarity of the lower terminal of the trip circuit outlet pressure plate is positive, if it is detected that the static electric field polarity of the lower terminal of the trip circuit outlet pressure plate changes from positive to non-polar, it is determined that the power supply input of the outlet circuit of the relay protection device fails; S3. Monitor the correctness of the outlet message of the relay protection device according to the operation information of the outlet circuit of the relay protection device, and obtain the corresponding monitoring result of the correctness of the outlet message; S4. Monitor the connection state of the control circuit of the circuit breaker according to the operation information of the outlet circuit of the relay protection device, and obtain the corresponding monitoring result of the connection state of the control circuit of the circuit breaker.

2. The on-line monitoring method for the integrity of the relay protection export circuit according to claim 1, characterized in that, Step S3 specifically includes: Identify the static electric field polarity of the lower terminal of the trip circuit outlet pressure plate according to the opening / closing position of the circuit breaker and the on / off state of the trip circuit outlet pressure plate, and judge whether the static electric field polarity of the lower terminal of the trip circuit outlet pressure plate is consistent with the outlet message of the relay protection device. If it is judged that the static electric field polarity of the lower terminal of the trip circuit outlet pressure plate is consistent with the outlet message of the relay protection device, it is determined that the outlet message of the relay protection device is correct. If it is judged that the static electric field polarity of the lower terminal of the trip circuit outlet pressure plate is inconsistent with the outlet message of the relay protection device, the outlet message of the relay protection device is incorrect; Identify the static electric field polarity of the lower terminal of the closing circuit outlet pressure plate according to the opening / closing position of the circuit breaker and the on / off state of the closing circuit outlet pressure plate, and judge whether the static electric field polarity of the lower terminal of the closing circuit outlet pressure plate is consistent with the outlet message of the relay protection device. If it is judged that the static electric field polarity of the lower terminal of the closing circuit outlet pressure plate is consistent with the outlet message of the relay protection device, it is determined that the outlet message of the relay protection device is correct. If it is judged that the static electric field polarity of the lower terminal of the closing circuit outlet pressure plate is inconsistent with the outlet message of the relay protection device, the outlet message of the relay protection device is incorrect.

3. The on-line monitoring method for the integrity of the relay protection tripping circuit according to claim 1, characterized in that Step S4 specifically includes: When the circuit breaker is in the closed position, if the trip outlet pressure plate is in the energized state and the static electric field polarity at the lower terminal of the trip circuit outlet pressure plate changes from negative to positive, it is determined that the connection state of the circuit breaker's control circuit is interrupted; When the circuit breaker is in the open position, if the closing outlet pressure plate is in the energized state and the static electric field polarity at the lower terminal of the closing circuit outlet pressure plate changes from negative to positive, it is determined that the connection state of the circuit breaker's control circuit is interrupted.

4. The online monitoring method for the integrity of the relay protection export circuit according to claim 1, characterized in that It further includes: S5. Obtain the monitoring results of the positive power supply input, the correctness of the outlet message, and the connection state monitoring result of the circuit breaker's control circuit, and determine whether the monitoring results of the positive power supply input, the correctness of the outlet message, and / or the connection state monitoring result of the circuit breaker's control circuit are abnormal. If it is determined that the monitoring results of the positive power supply input, the correctness of the outlet message, and / or the connection state monitoring result of the circuit breaker's control circuit are abnormal, an alarm is issued.

5. An on-line monitoring system for the integrity of a relay protection export circuit, characterized in that, It includes: An information acquisition module for acquiring the operation information of the outlet circuit of the relay protection device, where the operation information includes the static electric field polarity at the lower terminal of the trip circuit outlet pressure plate, the on / off state of the trip circuit outlet pressure plate, the static electric field polarity at the lower terminal of the closing circuit outlet pressure plate, the on / off state of the closing circuit outlet pressure plate, and the open / closed position of the circuit breaker; A first monitoring module for monitoring the input of the positive power supply of the outlet circuit of the relay protection device according to the operation information of the outlet circuit of the relay protection device during the normal operation of the relay protection device, and obtaining the corresponding monitoring result of the positive power supply input; The first monitoring module specifically includes: A circuit breaker state identification module for identifying the open / closed position of the circuit breaker during the normal operation of the relay protection device. When the circuit breaker is in the closed position, a working signal is sent to the first positive power supply monitoring module. When the circuit breaker is in the open position, a working signal is sent to the second positive power supply monitoring module; The first positive power supply monitoring module is used to determine that the input of the positive power supply of the outlet circuit of the relay protection device fails when the closing outlet pressure plate is in the energized state and the static electric field polarity at the lower terminal of the closing circuit outlet pressure plate is positive, and if it is detected that the static electric field polarity at the lower terminal of the closing circuit outlet pressure plate changes from positive to non-polar; The second positive power supply monitoring module is used to determine that the input of the positive power supply of the outlet circuit of the relay protection device fails when the circuit breaker is in the open position, the trip outlet pressure plate is in the energized state, and the static electric field polarity at the lower terminal of the trip circuit outlet pressure plate is positive, and if it is detected that the static electric field polarity at the lower terminal of the trip circuit outlet pressure plate changes from positive to non-polar; A second monitoring module for monitoring the correctness of the outlet message of the relay protection device according to the operation information of the outlet circuit of the relay protection device, and obtaining the corresponding monitoring result of the correctness of the outlet message; A third monitoring module for monitoring the connection state of the circuit breaker's control circuit according to the operation information of the outlet circuit of the relay protection device, and obtaining the corresponding monitoring result of the connection state of the circuit breaker's control circuit.

6. The on-line monitoring system for the integrity of the relay protection export circuit according to claim 5, characterized in that The second monitoring module specifically includes: The first message monitoring module is used to identify the static electric field polarity of the lower terminal of the trip circuit outlet pressure plate according to the opening / closing position of the circuit breaker and the on / off state of the trip circuit outlet pressure plate, and determine whether the static electric field polarity of the lower terminal of the trip circuit outlet pressure plate is consistent with the outlet message of the relay protection device. If it is determined that the static electric field polarity of the lower terminal of the trip circuit outlet pressure plate is consistent with the outlet message of the relay protection device, it is determined that the outlet message of the relay protection device is correct. If it is determined that the static electric field polarity of the lower terminal of the trip circuit outlet pressure plate is inconsistent with the outlet message of the relay protection device, the outlet message of the relay protection device is incorrect; The second message monitoring module is used to identify the static electric field polarity of the lower terminal of the closing circuit outlet pressure plate according to the opening / closing position of the circuit breaker and the on / off state of the closing circuit outlet pressure plate, and determine whether the static electric field polarity of the lower terminal of the closing circuit outlet pressure plate is consistent with the outlet message of the relay protection device. If it is determined that the static electric field polarity of the lower terminal of the closing circuit outlet pressure plate is consistent with the outlet message of the relay protection device, it is determined that the outlet message of the relay protection device is correct. If it is determined that the static electric field polarity of the lower terminal of the closing circuit outlet pressure plate is inconsistent with the outlet message of the relay protection device, the outlet message of the relay protection device is incorrect.

7. The on-line monitoring system for the integrity of the relay protection export circuit according to claim 5, characterized in that, The third monitoring module specifically includes: The first connection state monitoring module is used to determine that the connection state of the control circuit of the circuit breaker is interrupted when the opening / closing position of the circuit breaker is in the closed state, if the trip outlet pressure plate is in the on state and the static electric field polarity of the lower terminal of the trip circuit outlet pressure plate changes from negative to positive; The second connection state monitoring module is used to determine that the connection state of the control circuit of the circuit breaker is interrupted when the opening / closing position of the circuit breaker is in the open state, if the closing outlet pressure plate is in the on state and the static electric field polarity of the lower terminal of the closing circuit outlet pressure plate changes from negative to positive.

8. The on-line monitoring system for the integrity of the relay protection export circuit according to claim 5, characterized in that It further includes: The alarm module is used to obtain the monitoring results of the positive power supply input, the monitoring results of the correctness of the outlet message, and the monitoring results of the connection state of the control circuit of the circuit breaker, and determine whether the monitoring results of the positive power supply input, the monitoring results of the correctness of the outlet message, and / or the monitoring results of the connection state of the control circuit of the circuit breaker are abnormal. If it is determined that the monitoring results of the positive power supply input, the monitoring results of the correctness of the outlet message, and / or the monitoring results of the connection state of the control circuit of the circuit breaker are abnormal, an alarm is issued.

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