Automatic switching method and device for main transformer protection outlet soft pressing plate

Abstract

The invention relates to the technical field of power system automation, and discloses a main transformer protection outlet soft pressing plate automatic switching method and device, and the method achieves the automatic switching of a main transformer protection outlet soft pressing plate through the automatic recognition of the operation mode of a primary system of a target transformer substation. The technical problem that in the current bus switching operation, an operator needs to put and withdraw a main transformer protection outlet soft pressing plate on site is solved.

Description

Technical Field

[0001] This invention relates to the field of power system automation technology, and in particular to a method and apparatus for automatically engaging and disengaging the soft pressure plate at the protection outlet of a main transformer. Background Technology

[0002] Currently, for substations with double busbar and double-section wiring, to prevent the scope of fault impact from expanding, the main transformer protection tripping sectionalizing switches need to be adjusted according to changes in operating mode, i.e., the tripping output pressure plates need to be adjusted according to the different busbars in operation. This process requires maintenance personnel to operate the tripping output pressure plates on-site at the substation during primary equipment switching operations. With the development of integrated control, busbar switching operations are increasingly being performed in the control center through programmed operations. However, the operation of the main transformer protection tripping sectionalizing output pressure plates during the switching process still requires on-site operation personnel, which has become a major factor restricting operational efficiency. Summary of the Invention

[0003] This invention provides a method and device for automatically engaging and disengaging the soft pressure plate at the main transformer protection outlet, which solves the technical problem that currently, bus switching operations require operators to engage and disengage the soft pressure plate at the main transformer protection outlet on-site.

[0004] The first aspect of this invention provides a method for automatically engaging and disengaging a soft pressure plate at the output of a main transformer protection system, comprising:

[0005] Real-time acquisition of remote disconnector location information of the target substation;

[0006] When the position of the disconnector on the main busbar side of the target substation changes, the first position criterion information and the second position criterion information of the disconnector on the main busbar side are obtained.

[0007] When the first position criterion information matches the second position criterion information, the local disconnector position information and analog quantity information associated with the bus differential protection operation are obtained.

[0008] When the remote disconnector location information matches the local disconnector location information, it is determined whether the analog quantity information meets the preset differential current over-limit condition.

[0009] If the analog quantity information does not meet the preset differential current over-limit condition, then obtain the operating soft pressure plate status information of the main transformer protection operation associated switch and the current dual busbar operating mode.

[0010] Based on the comparison results between the operating soft pressure plate status information and the standard soft pressure plate status information associated with the dual busbar operation mode, the main transformer protection operation associated switch is put into or taken out of operation.

[0011] Optionally, obtaining the first position criterion information and the second position criterion information of the main transformer busbar side disconnector includes:

[0012] The electrical auxiliary contact discrimination method is used to obtain the disconnector position information of the main transformer bus side disconnector as the first position criterion information;

[0013] The position information of the disconnector on the main transformer bus side is obtained by using the electrical auxiliary contact discrimination method and the sensor monitoring discrimination method as the second position criterion information.

[0014] Optionally, the local disconnector location information includes disconnector location information associated with bus differential protection operation obtained through electrical auxiliary contact discrimination method or sensor monitoring discrimination method;

[0015] The remote disconnector location information includes the disconnector location information of the disconnector associated with the bus differential protection operation obtained through the operation control system associated with the target substation.

[0016] Optionally, the analog quantity information includes the first bus differential current value and the second bus differential current value;

[0017] The preset differential current over-limit condition is specifically that the value of the first bus differential current is greater than the preset differential current abnormal setting value, or the value of the second bus differential current is greater than the preset differential current abnormal setting value.

[0018] Optionally, the step of performing an on / off operation on the main transformer protection operation associated switch based on the comparison result between the operating soft pressure plate status information and the standard soft pressure plate status information associated with the dual busbar operation mode includes:

[0019] When the running soft pressure plate status information matches the standard soft pressure plate status information, the current soft pressure plate status of the main transformer protection operation associated switch is maintained.

[0020] If the status information of the operating soft pressure plate does not match the status information of the standard soft pressure plate, the main transformer protection operation associated switch is put into or taken out of operation according to the status information of the standard soft pressure plate.

[0021] Optionally, the dual busbar operation mode includes a first single busbar operation mode and a second single busbar operation mode.

[0022] The second aspect of this invention provides an automatic activation / deactivation device for the soft pressure plate at the main transformer protection outlet, comprising:

[0023] The data acquisition and monitoring module is used to acquire the remote disconnector location information of the target substation in real time;

[0024] The response module is used to obtain the first position criterion information and the second position criterion information of the main transformer bus side disconnector when the position of the disconnector on the main transformer bus side of the target substation changes.

[0025] The first processing module is used to obtain the local disconnector location information and analog quantity information of the disconnector associated with the bus differential protection operation when the first position criterion information is consistent with the second position criterion information.

[0026] The second processing module is used to determine whether the analog quantity information meets the preset differential current over-limit condition when the remote disconnector position information is consistent with the local disconnector position information.

[0027] The third processing module is used to obtain the operating soft pressure plate status information of the main transformer protection operation associated switch and the current dual busbar operation mode if the analog quantity information does not meet the preset differential current over-limit condition.

[0028] The activation / deactivation module is used to activate or deactivate the main transformer protection associated switch based on the comparison result between the running soft pressure plate status information and the standard soft pressure plate status information associated with the dual busbar operation mode.

[0029] The third aspect of the present invention provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor causes the processor to perform the steps of the automatic activation / deactivation method of the main transformer protection outlet soft pressure plate as described in any of the preceding claims.

[0030] The fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed, it implements the automatic activation / deactivation method of the main transformer protection outlet soft pressure plate as described in any of the preceding claims.

[0031] The fifth aspect of the present invention provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, wherein, when the program instructions are executed by a computer, the computer performs the automatic activation / deactivation method of the main transformer protection outlet soft pressure plate as described in any of the preceding claims.

[0032] As can be seen from the above technical solutions, the present invention has the following advantages:

[0033] The system acquires the remote disconnector position information of the target substation in real time. When the position of the disconnector on the main transformer busbar side of the target substation changes, it acquires the first and second position criteria information of the main transformer busbar side disconnector. When the first and second position criteria information match, it acquires the local disconnector position information and analog quantity information of the disconnector associated with the bus differential protection operation. When the remote disconnector position information matches the local disconnector position information, it determines whether the analog quantity information meets the preset differential current over-limit condition. If the analog quantity information does not meet the preset differential current over-limit condition, it acquires the operating soft pressure plate status information of the switch associated with the main transformer protection operation and the current dual busbar operation mode. Based on the comparison result between the operating soft pressure plate status information and the standard soft pressure plate status information associated with the dual busbar operation mode, it performs the activation or deactivation operation on the switch associated with the main transformer protection operation. This invention solves the technical problem that the current busbar switching operation requires operators to activate or deactivate the main transformer protection output soft pressure plate on-site by automatically identifying the operation mode of the primary system of the target substation. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a flowchart illustrating the steps of an automatic activation / deactivation method for a main transformer protection outlet soft pressure plate according to Embodiment 1 of the present invention.

[0036] Figure 2 This is a flowchart illustrating the steps of an automatic activation / deactivation method for a main transformer protection outlet soft pressure plate according to Embodiment 2 of the present invention.

[0037] Figure 3 Architecture diagram of the automatic activation / deactivation system for the main transformer protection outlet soft pressure plate;

[0038] Figure 4 Electrical main wiring diagram for a 220kV substation with a double busbar and double-section connection method for the 220kV busbar;

[0039] Figure 5 This is a structural block diagram of an automatic activation / deactivation device for a main transformer protection outlet soft pressure plate provided in Embodiment 3 of the present invention;

[0040] Figure 6 This is a structural block diagram of a computer device provided in Embodiment 4 of the present invention. Detailed Implementation

[0041] This invention provides a method and apparatus for automatically enabling and disabling the soft pressure plate at the main transformer protection outlet, which solves the technical problem that current bus switching operations require operators to be on-site to enable and disable the soft pressure plate at the main transformer protection outlet.

[0042] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0043] Please see Figure 1 , Figure 1 This is a flowchart illustrating the steps of an automatic activation / deactivation method for a main transformer protection outlet soft pressure plate, as provided in Embodiment 1 of the present invention.

[0044] This invention provides a method for automatically engaging and disengaging a soft pressure plate at the output of a main transformer protection system, comprising:

[0045] Step 101: Obtain the remote disconnector location information of the target substation in real time.

[0046] The target substation refers to a substation that operates using a double busbar double-section connection method.

[0047] Remote disconnector position information refers to the disconnector position information (closed or open) of all switches (i.e., primary equipment) within the target substation obtained through the operation and control system associated with the target substation.

[0048] In this embodiment of the invention, the remote disconnector location information of all switches within the target substation is acquired in real time.

[0049] Step 102: When the position of the disconnector on the main busbar side of the target substation changes, the first position criterion information and the second position criterion information of the disconnector on the main busbar side are obtained.

[0050] In this embodiment of the invention, when it is detected that the position of the main transformer busbar disconnector of the target substation with double busbar double-section connection has changed, it indicates that the operation mode, electrical connection status protection configuration and other aspects of the target substation have changed. Then, the first position criterion information and the second position criterion information of the main transformer busbar disconnector are obtained.

[0051] Step 103: When the first position criterion information matches the second position criterion information, the local disconnector position information and analog quantity information of the disconnector associated with the bus differential protection operation are obtained.

[0052] Bus differential protection operation refers to a series of important operations in a power system to ensure the safe and stable operation of the bus. It mainly revolves around the bus differential protection device. When the substation bus is operating normally and the relevant equipment is ready for operation, the bus differential protection device needs to be put into use. When the bus equipment is being repaired, tested, or the protection device itself needs maintenance, the bus differential protection device needs to be taken out of operation to avoid the protection device malfunctioning and affecting the maintenance work.

[0053] Local disconnector location information refers to the disconnector location information associated with bus differential protection operations obtained through electrical auxiliary contact discrimination method or sensor monitoring discrimination method.

[0054] Analog quantity information refers to electrical parameter information that exists in the form of continuously changing physical quantities in the bus differential protection of a power system and can reflect the operating status of the power system, including but not limited to the small differential current value of the first bus, the small differential current value of the second bus, and the large differential current value of the bus differential protection.

[0055] In this embodiment of the invention, the first position criterion information and the second position criterion information are compared. A double-confirmation logic is employed: the main transformer busbar side disconnector position is only processed if the first and second position criterion information match; otherwise, it is considered invalid, and an alarm signal is issued. When the first and second position criterion information match, the local disconnector position information and analog quantity information associated with the bus differential protection operation are obtained.

[0056] Step 104: When the remote disconnector position information matches the local disconnector position information, determine whether the analog quantity information meets the preset differential current over-limit condition.

[0057] In this embodiment of the invention, the remote disconnector location information is compared with the local disconnector location information. A double confirmation logic is adopted, that is, the remote disconnector location information and the local disconnector location information are consistent in the bus differential protection operation associated disconnector location before the next step of processing is performed. When the remote disconnector location information and the local disconnector location information are consistent, it is determined whether the analog quantity information meets the preset differential current over-limit condition.

[0058] It should be noted that the initial judgment here is based on the position of the disconnector associated with the bus differential protection operation, using a double-confirmation logic. Then, the analog data is used for further judgment. When judging the consistency of the disconnector position, the analog information can play a role in verification and supplementation. This is because the position signal may be inaccurate due to reasons such as auxiliary contact failure or transmission mechanism jamming. At this time, the analog information becomes an important reference. By analyzing the analog information, it is possible to more accurately judge whether the disconnectors are consistent, thus ensuring the reliable operation of the bus differential protection.

[0059] Step 105: If the analog quantity information does not meet the preset differential current over-limit condition, then obtain the operating soft pressure plate status information of the main transformer protection operation associated switch and the current dual busbar operating mode.

[0060] Preset differential current over-limit conditions refer to the pre-set range of differential current values ​​(such as bus differential protection large differential current, bus small differential current) used to determine whether the bus operating status is abnormal.

[0061] Dual busbar operation mode refers to a main wiring configuration in a substation within a power system. By setting up two busbars and related switching equipment, it significantly improves the reliability, flexibility, and operational efficiency of power supply. During normal operation, some incoming and outgoing circuits can be connected to busbar I, and the rest to busbar II; alternatively, both busbars can simultaneously supply power to all incoming and outgoing circuits. By operating circuit breakers and disconnectors, incoming and outgoing circuits can be flexibly switched from one busbar to the other, thus adapting to different operational needs and fault handling situations. Dual busbar operation mode includes a first single busbar operation mode and a second single busbar operation mode.

[0062] Main transformer protection operation refers to the operation that ensures the safe and stable operation of the main transformer and guarantees the reliable power supply of the power system.

[0063] The status information of the operating soft switch refers to the status of the trip output soft switch of the main transformer protection operation obtained through the information protection master station associated with the target substation.

[0064] In this embodiment of the invention, if the analog quantity information does not meet the preset differential current over-limit condition, it indicates that the bus is currently in normal operation and no obvious fault or abnormality has occurred. The disconnector position is corresponding. Then, the trip output soft pressure plate status of the main transformer protection operation associated switch and the current dual bus operation mode of the target substation are obtained through the protection and information master station associated with the target substation.

[0065] Step 106: Based on the comparison results between the operating soft pressure plate status information and the standard soft pressure plate status information associated with the dual busbar operation mode, perform the activation or deactivation operation on the main transformer protection associated switch.

[0066] Standard soft pressure plate status information refers to the predefined state of the soft pressure plate under the dual busbar operation mode. This standard soft pressure plate status information is used to guide operation and maintenance personnel to correctly set the soft pressure plate under different operation modes, so as to ensure that the protection device can adapt to the changes in the power grid operation mode and achieve accurate and reliable protection functions.

[0067] In this embodiment of the invention, the operating soft pressure plate status information is compared with the standard soft pressure plate status information associated with the dual busbar operation mode. If the operating soft pressure plate status information matches the standard soft pressure plate status information, the current soft pressure plate status of the switch associated with the main transformer protection operation is maintained, that is, the current soft pressure plate status associated with the operating soft pressure plate status information is maintained. If the operating soft pressure plate status information does not match the standard soft pressure plate status information, the switch associated with the main transformer protection operation is put into or taken out of operation according to the standard soft pressure plate status information.

[0068] In this invention, the remote disconnector position information of the target substation is acquired in real time. When the position of the disconnector on the main transformer busbar side of the target substation changes, the first position criterion information and the second position criterion information of the main transformer busbar side disconnector are acquired. When the first position criterion information and the second position criterion information are consistent, the local disconnector position information and analog quantity information associated with the busbar differential protection operation are acquired. When the remote disconnector position information and the local disconnector position information are consistent, it is determined whether the analog quantity information meets the preset differential current over-limit condition. If the analog quantity information does not meet the preset differential current over-limit condition, the main transformer differential protection operation is initiated. This invention obtains and compares the operating soft switch status information of the protection operation associated switch and the current dual busbar operation mode; based on the comparison results between the operating soft switch status information and the standard soft switch status information associated with the dual busbar operation mode, it performs the activation or deactivation operation on the main transformer protection operation associated switch; through the comprehensive acquisition and comparison of disconnector position information, the analysis and judgment of analog quantity information, and the automated comparison and operation of soft switch status, this invention realizes the automatic activation and deactivation of the main transformer protection output soft switch during busbar switching operations, solves the technical problem that currently requires on-site operation by operators, and improves the operating efficiency and reliability of the power system.

[0069] Please see Figure 2 , Figure 2 This is a flowchart illustrating the steps of an automatic activation / deactivation method for a main transformer protection outlet soft pressure plate, as provided in Embodiment 2 of the present invention.

[0070] This invention provides an automatic activation / deactivation method for the soft pressure plate at the main transformer protection output, which is applied to an automatic activation / deactivation system for the soft pressure plate at the main transformer protection output. The automatic activation / deactivation system for the soft pressure plate at the main transformer protection output includes an intelligent operation and maintenance server, an OCS system (Operation Control System), a remote motor, a measurement and control device, a protection and information master station, an intelligent waveform recorder, a bus differential protection module, a main transformer protection module, a receiving device, a first micro switch, and a second micro switch.

[0071] Please see Figure 3 , Figure 3 Architecture diagram of the automatic activation / deactivation system for the main transformer protection outlet soft pressure plate;

[0072] Both the bus differential protection module and the main transformer protection module are connected to one end of the intelligent waveform recorder for communication.

[0073] The intelligent waveform recorder is deployed on the substation side to realize the operation and maintenance management of the protection device. It can collect the analog and input signals of the protection device in real time, and realize the remote control function of the protection device.

[0074] The other end of the intelligent waveform recorder is connected to one end of the intelligent operation and maintenance server through the main station of the information security system.

[0075] The intelligent operation and maintenance server is deployed in the control center to analyze the operation mode of the target substation in real time and issue commands to the main station of Baoxin to execute relevant soft pressure plate operations;

[0076] The main station of the security information system is deployed in the control center to collect real-time information sent by the protection devices of the target substation and forward the commands issued by the intelligent operation and maintenance server to enable remote activation and deactivation of the protection soft pressure plate.

[0077] The other end of the intelligent operation and maintenance server communicates with one end of the remote machine through the OCS system;

[0078] The OCS system, or power grid operation monitoring system, is deployed in the control center to collect the positions of primary system switches and disconnectors of the target substation in real time and send them to the intelligent operation and maintenance server.

[0079] The other end of the remote motor is connected to the first end of the telemetry and control device via a communication connection.

[0080] The remote control unit is deployed on the substation side to collect real-time information on the positions of switches and disconnectors;

[0081] All disconnectors in the target substation are connected to a first micro switch and a second micro switch;

[0082] The first micro switch is communicatively connected to the second end of the measurement and control device;

[0083] The second micro switch is connected to the third terminal via a receiving device;

[0084] The receiving device is connected to a sensor, which is either an attitude sensor or a magnetic induction sensor.

[0085] Both the first and second microswitches are auxiliary nodes for the disconnector, used to identify the open and closed positions of the disconnector. The first microswitch is located at the disconnector operating mechanism, and the second microswitch is located at the disconnector transmission rod. Both microswitches work simultaneously. If one fails, the other can still provide a position signal normally, which can avoid misjudgment caused by the failure of a single switch and improve the reliability of disconnector position identification.

[0086] Among them, the first micro switch directly provides a first switching signal indicating whether the disconnector is open or closed based on the disconnector auxiliary node, and uses the first switching signal as the first position criterion information;

[0087] The second micro switch directly provides a second switching signal indicating whether the disconnector is open or closed based on the disconnector auxiliary node;

[0088] When the sensor is an attitude sensor, at the instant the disconnect switch is operated, the second microswitch quickly sends a second switching signal, and the attitude sensor simultaneously begins monitoring the angle change. If the second microswitch indicates a closing action, and the angle change monitored by the attitude sensor also conforms to the angle range that the corresponding component should have during closing, then they mutually verify each other, confirm the disconnect switch's closed state, and generate the second position criterion information.

[0089] When the sensor is a magnetic induction sensor, the contact state of the second microswitch changes when the disconnector is opened or closed, and the magnetic induction sensor simultaneously senses the change in magnetic field caused by the change in the disconnector's position. If both detection results are consistent, indicating that the disconnector is in the closed state, then second position criterion information can be generated.

[0090] The receiving device is used to receive the second position criterion information and send the second position criterion information to the measurement and control device to realize double confirmation of the position of the disconnect switch.

[0091] For easier understanding, please refer to Figure 4 , Figure 4 The electrical main wiring diagram for a 220kV substation with a double busbar and double-section connection method for the 220kV busbar.

[0092] Among them, 1M and 2M are two sets of main busbars in the double busbar double-section connection of the 220kV substation.

[0093] 5M, 6M: In the double busbar double-section wiring of a 220kV substation, the busbar sections are formed by segmenting 1M and 2M respectively.

[0094] #1 Bus Tie 2012 Switch: A bus tie switch used to connect the 1M and 2M main busbars.

[0095] #2 Bus Tie 2056 Switch: A bus tie switch used to connect the 5M and 6M bus sections.

[0096] #1 Segment 2015 Switch: A segment switch used to connect 1M and 5M.

[0097] #2 Segment 2026 Switch: A segment switch used to connect 2M and 6M circuits.

[0098] #1 Main Transformer: The main transformer connected to the 1M and 2M busbars, its protection is equipped with the relevant circuits and output soft pressure plates for tripping switches 2012, 2015 and 2026.

[0099] #2 Main Transformer: The main transformer connected to the 5M and 6M busbars, its protection is equipped with the relevant circuits of trip 2056 switch, trip 2015 switch and trip 2026 switch and the output soft pressure plate.

[0100] 22011 Disconnector: The disconnector on the side connected to the #1 main transformer.

[0101] 22012 Disconnect Switch: The disconnect switch on the other side of the #1 main transformer connection.

[0102] 20121 Disconnector: Disconnector connected to one side of the busbar of the #1 bus tie 2012 switch.

[0103] 20122 Disconnector: The disconnector that connects the #1 bus tie 2012 switch to the other side of the busbar.

[0104] 20151 Disconnect Switch: #1 section 2015 switch disconnect switch connected to 1M busbar.

[0105] 20155 Disconnector: #1 section 2015 switch disconnector connected to the 5M busbar.

[0106] 20262 Disconnector: Disconnector of the #2 section 2026 switch to the 2M busbar.

[0107] 20266 disconnect switch: #2 section 2026 switch disconnect switch connected to 6M busbar.

[0108] 22025 Disconnector: The disconnector on the side connected to the #2 main transformer.

[0109] 22026 Disconnect switch: The disconnect switch on the other side of the #2 main transformer connection.

[0110] 20566 disconnect switch: The disconnect switch connected to one side of the busbar of the #2 bus tie 2056 switch.

[0111] 20565 Disconnect Switch: The disconnect switch connecting the #2 bus tie 2056 switch to the other side of the bus.

[0112] It should be noted that 1M and 2M are connected via the #1 bus tie 2012 switch, 5M and 6M are connected via the #2 bus tie 2056 switch, 1M and 5M are connected via the #1 section 2015 switch, and 2M and 6M are connected via the #2 section 2026 switch; the #1 main transformer is on the 1M and 2M busbars, and the #2 main transformer is on the 5M and 6M busbars; the #1 main transformer protection is equipped with relevant circuits and output soft pressure plates for tripping switches 2012, 2015, and 2026; the #2 main transformer protection is equipped with relevant circuits and output soft pressure plates for tripping switches 2056, 2015, and 2026.

[0113] To prevent the scope of the fault from expanding during a fault, when the 22011 disconnect switch of the #1 main transformer is in the closed position and the 22012 disconnect switch is in the open position, and when the 20122 and 20121 disconnect switches are in the closed position, the protection of the #1 main transformer should trip the 2012 switch.

[0114] When disconnectors 20151 and 20155 are in the closed position, the protection of main transformer #1 should trip switch 2015 and deactivate switch 2026.

[0115] When the 22012 disconnect switch of the #1 main transformer is in the closed position and the 22011 disconnect switch is in the open position, and when the 20122 and 20121 disconnect switches are in the closed position, the protection of the #1 main transformer should trip the 2012 switch.

[0116] When disconnectors 20262 and 20266 are in the closed position, the protection of main transformer #1 should trip switch 2026 and de-trip switch 2015 at the same time.

[0117] When the 22011 and 22012 disconnect switches of the #1 main transformer are simultaneously in the closed or open position, maintain the original mode and no action is required.

[0118] Step 201: Obtain the remote disconnector location information of the target substation in real time.

[0119] In this embodiment of the invention, the intelligent operation and maintenance server is associated with the primary system diagram of the OCS system, and collects and analyzes the location of the disconnectors in the OCS system in real time.

[0120] Step 202: When the position of the disconnector on the main busbar side of the target substation changes, the disconnector position information on the main busbar side is obtained using the electrical auxiliary contact discrimination method as the first position criterion information.

[0121] The electrical auxiliary contact discrimination method refers to the method of indirectly determining the actual position of the main contacts of a switchgear by using the on / off state of the electrical auxiliary contacts attached to the switchgear (such as a knife switch).

[0122] In this embodiment of the invention, when a change in the position of the disconnector on the main busbar side of a double-busbar, double-sectioned substation is detected, for example, when the #1 main transformer 220kV side changes from 1M to 2M (i.e., when the #1 main transformer 220kV disconnector 22011 changes from closed to open and the #1 main transformer 220kV disconnector 22012 changes from open to closed), the intelligent operation and maintenance server will automatically send a call command to the main station. The first microswitch, as an auxiliary node of the disconnector, is installed on the disconnector's operating mechanism. When the main busbar side disconnector is opened or closed, the first microswitch changes its on / off state according to the mechanical movement of the disconnector's operating mechanism. If the disconnector is in the closed position, the microswitch is closed, forming a complete electrical path; if the disconnector is in the open position, the microswitch is open, and the electrical path is cut off. When the microswitch is closed, the monitoring device detects a high-level signal, which is converted to the digital value 1; when the microswitch is open, it detects a low-level signal, which is converted to the digital value 0. Here, 1 indicates the disconnector is closed, and 0 indicates the disconnector is open. The position information of the disconnector on the main transformer bus side is obtained in this way as the first position criterion information.

[0123] Step 203: Use the electrical auxiliary contact discrimination method and the sensor monitoring discrimination method to obtain the disconnector position information of the main transformer bus side disconnector as the second position criterion information.

[0124] It should be noted that the disconnect switch on the main transformer bus side is 22014 or 22024.

[0125] In this embodiment of the invention, firstly, the position information of the disconnector on the main transformer bus side is obtained using an electrical auxiliary contact discrimination method. A second microswitch, acting as an auxiliary node for the disconnector, is installed on the disconnector drive rod. When the main transformer bus side disconnector is opened or closed, the drive rod moves accordingly, thereby driving the second microswitch installed on it to change its on / off state. If the disconnector is closed, the drive rod pushes the microswitch to close, forming a complete electrical path; if the disconnector is open, the drive rod causes the microswitch to open, cutting off the electrical path. When the microswitch is closed, the monitoring device detects a high-level signal, which is converted to the digital value 1; when the microswitch is open, it detects a low-level signal, which is converted to the digital value 0. Here, 1 indicates the disconnector is closed, and 0 indicates the disconnector is open. The second switching signal is obtained in this way; that is, the second microswitch directly provides a second switching signal indicating whether the disconnector is open or closed based on the disconnector auxiliary node.

[0126] When the sensor is an attitude sensor, at the instant the disconnector is operated, the second microswitch quickly sends a second switching signal, and the attitude sensor simultaneously begins monitoring the angle change. If the second microswitch indicates a closing action, and the angle change monitored by the attitude sensor also conforms to the angle range that the corresponding component should have when the disconnector is closed, then they verify each other, confirm the disconnector's closed state, and generate the second position criterion information.

[0127] When the sensor is a magnetic induction sensor, the contact state of the second microswitch changes when the disconnector is opened or closed, and the magnetic induction sensor simultaneously senses the change in magnetic field caused by the change in the disconnector's position. If both detection results are consistent, indicating that the disconnector is in the closed state, then second position criterion information can be generated.

[0128] The receiving device is used to receive the second position criterion information and send the second position criterion information to the measurement and control device to realize double confirmation of the position of the disconnect switch.

[0129] Step 204: When the first position criterion information matches the second position criterion information, the local disconnector position information and analog quantity information of the disconnector associated with the bus differential protection operation are obtained.

[0130] In this embodiment of the invention, the OCS system collects remote disconnector position information and performs a double-confirmation logic. That is, processing is only performed if the positions of the main transformer busbar disconnectors in the first and second position criteria are consistent; otherwise, it is considered invalid, and an alarm signal is sent to the OCS system. When the first and second position criteria match, the main station, according to the command from the intelligent operation and maintenance server, sends a summoning command to the relevant substation bus differential protection module to summon the local disconnector position information and analog quantity information associated with the bus differential protection operation. The summoned data is then transmitted to the intelligent operation and maintenance server. The disconnectors associated with the bus differential protection operation include disconnectors 22011 / 22012 / 20121 / 20122 / 20151 / 20155 / 20262 / 20266. The analog quantity information, taking 1M and 2M bus differential protection as examples, includes the large differential voltage of the bus differential protection. Differential current Id (large differential current value of bus differential protection), 1M small differential current Id1 (small differential current value of the first bus), 2M small differential current Id2 (small differential current value of the second bus); the large differential current refers to the phasor sum of the currents of all branches operating on the 1M and 2M buses, excluding the currents of switches 2012, 2015, and 2026; the 1M small differential current refers to the phasor sum of the currents of all branches operating on the 1M bus, including switches 2012 and 2015; the 2M small differential current refers to the phasor sum of the currents of all branches operating on the 2M bus, including switches 2012 and 2026. The intelligent operation and maintenance server collects the large differential current Id, 1M small differential current Id1, and 2M small differential current Id2 of the 1M and 2M bus differential protection in real time.

[0131] Step 205: When the remote disconnector position information matches the local disconnector position information, determine whether the analog quantity information meets the preset differential current over-limit condition.

[0132] Furthermore, the local disconnector location information includes the disconnector location information associated with the bus differential protection operation, obtained through electrical auxiliary contact discrimination method or sensor monitoring discrimination method;

[0133] Sensor monitoring and discrimination method refers to a method that uses various sensors to monitor the physical, chemical or biological quantities of a specific object in real time, and makes judgments on the object's state, characteristics or trend of change based on the monitoring data. In this invention, attitude sensors or magnetic induction sensors are directly used to obtain the position information of the disconnector associated with the bus differential protection operation.

[0134] It should be noted that in this step, there is no need to combine the second micro switch to give a second switching signal. The information obtained by the sensor monitoring and discrimination method or the information obtained by the electrical auxiliary contact discrimination method can be directly used as the position information of the disconnect switch.

[0135] In this embodiment of the invention, the local disconnect switch position information refers to the disconnect switch position information obtained through auxiliary contacts, attitude sensors or magnetic induction sensors, which is obtained directly from the disconnect switch itself or its physical state.

[0136] Furthermore, the remote disconnector location information includes the disconnector location information associated with the bus differential protection operation obtained through the operation control system associated with the target substation.

[0137] In this embodiment of the invention, the remote disconnector location information refers to the disconnector location information obtained through the OCS system after data processing and transmission, which is typically used for remote monitoring and scheduling operations.

[0138] It should be noted that in step 201, the remote switch location information of all switches has been obtained through the OCS system. In this step, only the switch location information of the switch associated with the bus differential protection operation is extracted for comparison.

[0139] In this embodiment of the invention, the remote disconnector location information and the local disconnector location information associated with the bus differential protection operation are compared. If the comparison result of any disconnector associated with the bus differential protection operation is inconsistent, the processing is stopped and an alarm message is sent to the OCS system, such as "The location of the #1 main transformer 220kV busbar disconnector of the XX station bus differential protection and the OCS system is inconsistent". If the remote disconnector location information and the local disconnector location information associated with all disconnectors associated with the bus differential protection operation are consistent, it is determined whether the analog quantity information meets the preset differential current over-limit condition.

[0140] Step 206: If the analog quantity information does not meet the preset differential current over-limit condition, then obtain the operating soft pressure plate status information of the main transformer protection operation associated switch and the current dual busbar operating mode.

[0141] Furthermore, the analog information includes the differential current values ​​of the first bus and the second bus;

[0142] The preset differential current over-limit condition is that the value of the small differential current of the first busbar is greater than the preset differential current abnormal setting value, or the value of the small differential current of the second busbar is greater than the preset differential current abnormal setting value.

[0143] It should be noted that during normal operation, the differential current Id of the 1M and 2M bus differential protection, the differential current Id1 of the 1M small differential protection, and the differential current Id2 of the 2M small differential protection should be close to zero. If the disconnector position does not correspond, the bus differential protection device will make an incorrect judgment when a fault occurs, resulting in differential current generated by the 1M small differential and 2M small differential protection. The disconnector position does not correspond to the actual disconnector position of the bus differential protection. That is, comparing the remote disconnector position information associated with the bus differential protection operation with the local disconnector position information in the aforementioned steps is only a preliminary judgment. Further judgment needs to be made in conjunction with analog data.

[0144] It should be noted that Idset is the preset differential current abnormal setting value, specifically the bus differential current abnormal alarm setting value, which is used to determine whether the bus differential current is normal.

[0145] In this embodiment of the invention, if the analog quantity information meets the preset differential current over-limit condition, i.e., Id1>Idset or Id2>Idset, the intelligent operation and maintenance server determines that the differential current is abnormal and the disconnector position is unreliable, terminates the operation directly, and sends an alarm message to the OCS system, such as "XX station bus differential protection differential current abnormal". If the analog quantity information does not meet the preset differential current over-limit condition, the main station sends a call command to the relevant substation main transformer protection module according to the command of the intelligent operation and maintenance server, calling the operating soft switch status information of the main transformer protection operation associated switch and the current dual bus operation mode, and transmits the called data back to the intelligent operation and maintenance server. The operating soft switch status information includes the output soft switch status of switch 2012, switch 2015, and switch 2026.

[0146] It should be noted that the following steps are included before step 207:

[0147] Determine whether the current dual-busbar operation mode of the target substation is either the first single-busbar operation mode or the second single-busbar operation mode;

[0148] If so, proceed to step 207;

[0149] If not, proceed to step 208.

[0150] Step 207: Based on the comparison results between the operating soft pressure plate status information and the standard soft pressure plate status information associated with the dual busbar operation mode, perform the activation or deactivation operation on the main transformer protection associated switch.

[0151] Furthermore, the dual busbar operation mode includes a first single busbar operation mode and a second single busbar operation mode.

[0152] It should be noted that both the first and second single-bus operation modes are single-bus operation modes: the main transformer is connected to only one bus (bus 1M or bus 2M), and the protection logic adjusts the trip switch according to the bus where the main transformer is located.

[0153] To facilitate understanding, a specific application example is provided below:

[0154] First single busbar operation mode:

[0155] The #1 main transformer has its 22011 disconnect switch in the closed position and its 22012 disconnect switch in the open position, indicating that the #1 main transformer is connected to bus 1M.

[0156] When disconnectors 20122 and 20121 are in the closed position, the protection of main transformer #1 trips switch 2012. That is, the standard soft switch status information associated with the first single busbar operation mode is that the soft switch output soft switch of switch 2012 is tripped.

[0157] When disconnectors 20151 and 20155 are in the closed position, the protection of main transformer #1 trips switch 2015 and disconnects switch 2026. That is, the standard soft switch status information associated with the first single busbar operation mode is that the soft switch output soft switch is activated and the soft switch output soft switch is deactivated.

[0158] In the specific implementation, if the dual busbar operation mode is the first single busbar operation mode, then it is necessary to determine whether the obtained operation soft pressure plate status information meets the requirements of putting the soft pressure plate at the outlet of switch 2012, putting the soft pressure plate at the outlet of switch 2015, and taking the soft pressure plate at the outlet of switch 2026 out.

[0159] Second single busbar operation mode:

[0160] The fact that switch 22012 of main transformer #1 is in the closed position and switch 22011 is in the open position indicates that main transformer #1 is connected to bus 2M.

[0161] When disconnectors 20122 and 20121 are in the closed position, the protection of main transformer #1 trips switch 2012. That is, the standard soft switch status information associated with the second single busbar operation mode is that the soft switch output soft switch is tripped.

[0162] When disconnectors 20262 and 20266 are in the closed position, the protection of main transformer #1 trips switch 2026 and disconnects switch 2015. That is, the standard soft switch status information associated with the second single busbar operation mode is that the soft switch output soft switch is activated and the soft switch output soft switch is deactivated.

[0163] Furthermore, step 207 may include the following sub-steps:

[0164] S11. When the status information of the operating soft pressure plate is consistent with the status information of the standard soft pressure plate, the current soft pressure plate status of the main transformer protection operation associated switch is maintained.

[0165] In this embodiment of the invention, for example, if the current dual-busbar operation mode is the first single-busbar operation mode, then the standard soft-plate status information associated with the first single-busbar operation mode is: the soft-plate at the outlet of switch 2012 is engaged, the soft-plate at the outlet of switch 2015 is engaged, and the soft-plate at the outlet of switch 2026 is disengaged. It is determined whether the running soft-plate status information is: the soft-plate at the outlet of switch 2012 is engaged, the soft-plate at the outlet of switch 2015 is engaged, and the soft-plate at the outlet of switch 2026 is disengaged. If they are consistent, then the soft-plate at the outlet of switch 2012 is engaged, the soft-plate at the outlet of switch 2015 is engaged, and the soft-plate at the outlet of switch 2026 is disengaged for operation. That is, when the running soft-plate status information is consistent with the standard soft-plate status information, it means that the current soft-plate status of the main transformer protection operation associated switch is consistent with the status that should be in the current dual-busbar operation mode, and there is no need to engage or disengage.

[0166] S12. If the status information of the operating soft pressure plate is inconsistent with the status information of the standard soft pressure plate, the main transformer protection operation associated switch shall be put into or taken out of operation according to the status information of the standard soft pressure plate.

[0167] In this embodiment of the invention, if the comparison is inconsistent, for example, if the soft pressure plate at the output of switch 2026 in the running soft pressure plate status information is in the engaged state, then a command to enable or disable the main transformer protection output soft pressure plate is sent to the main protection station. The command to enable or disable the main transformer protection output soft pressure plate includes: substation name, main transformer protection name, and the name of the output soft pressure plate to be enabled or disabled, such as "disable the soft pressure plate at the output of switch 2026 in the #1 main transformer protection of 220kVXX station". Or, if the soft pressure plate at the output of switch 2015 in the running soft pressure plate status information is in the disengaged state, then a command to enable or disable the main transformer protection output soft pressure plate is sent to the main protection station, such as "enable the soft pressure plate at the output of switch 2015 in the #1 main transformer protection of 220kVXX station". The main station of the power supply and control system (PSC) issues a command to activate or deactivate the soft switch output of the main transformer protection system to the PSC substation of the target substation, based on the command issued by the intelligent operation and maintenance server. The main transformer protection system of the target substation executes the command and, upon completion, transmits the status of the soft switch output to the intelligent operation and maintenance server via the PSC main station. The intelligent operation and maintenance server, upon receiving the status, analyzes whether the status matches the operating mode, i.e., it compares the operating soft switch status information with the standard soft switch status information. If they do not match, it returns a message to the OCS system: "The status of the main transformer protection output soft switch at station XX is inconsistent with the operating mode; automatic activation / deactivation failed, manual execution required." If they match, it returns a message: "The main transformer protection output soft switch at station XX has been successfully activated / deactivated automatically." This invention can automatically activate or deactivate the soft switch output based on changes in the current dual-busbar operating mode of the target substation, eliminating the need for on-site personnel during busbar switching operations.

[0168] It is worth mentioning that the dual busbar operation mode also includes the dual busbar crossover operation mode and the main transformer outage mode.

[0169] Furthermore, it also includes the following steps:

[0170] Step 208: Determine whether the double busbar operation mode is the double busbar bridging operation mode or the main transformer shutdown state mode, and based on the determination result, determine whether to maintain the current soft pressure plate status of the main transformer protection operation associated switch or output an alarm signal.

[0171] Furthermore, step 208 includes the following sub-steps:

[0172] S21. Determine whether the double busbar operation mode is the double busbar bridging operation mode or the main transformer outage state mode.

[0173] S22. If so, maintain the current soft pressure plate state of the main transformer protection operation associated switch;

[0174] S23. If not, output an alarm signal.

[0175] It should be noted that if the dual busbar operation mode in the target substation does not belong to any of the first single busbar operation mode, the second single busbar operation mode, the dual busbar bridging operation mode, or the main transformer outage state mode, it indicates that the dual busbar operation mode is another special operation mode (such as busbar split operation, etc.). In this case, it is necessary to further analyze the operating conditions of the main transformer and the types of faults that may be encountered under this operation mode.

[0176] Dual busbar bridging operation mode: The main transformer is connected to two busbars simultaneously, and the protection logic remains unchanged.

[0177] Main transformer outage mode: The main transformer is disconnected from both busbars and does not participate in system operation.

[0178] Double busbar bridging operation mode:

[0179] #1 With both disconnectors 22011 and 22012 of the main transformer in the closed position, and the main transformer connected to both busbars simultaneously, this operation mode is relatively complex. While it improves the reliability and flexibility of power supply, it places higher demands on protection configuration and operation management. In this situation, since the main transformer is connected to both busbars, the existing protection operating logic has already considered this cross-connection scenario, so no changes are needed.

[0180] Main transformer outage status mode:

[0181] With both disconnectors 22011 and 22012 of the main transformer in the open position, the main transformer is completely disconnected from the bus system and does not participate in the operation of the power system. The original protection mode is maintained at this time because no fault will occur if the main transformer is not operating, and therefore no adjustment to the protection action strategy is necessary.

[0182] Therefore, when the 22011 and 22012 disconnect switches of the #1 main transformer are simultaneously in the closed or open position, the original method is maintained and no action is required.

[0183] In this invention, the remote disconnector position information of the target substation is acquired in real time. When the position of the disconnector on the main transformer busbar side of the target substation changes, the first position criterion information and the second position criterion information of the main transformer busbar side disconnector are acquired. When the first position criterion information and the second position criterion information are consistent, the local disconnector position information and analog quantity information associated with the busbar differential protection operation are acquired. When the remote disconnector position information and the local disconnector position information are consistent, it is determined whether the analog quantity information meets the preset differential current over-limit condition. If the analog quantity information does not meet the preset differential current over-limit condition, the main transformer differential protection operation is initiated. This invention obtains and compares the operating soft switch status information of the protection operation associated switch and the current dual busbar operation mode; based on the comparison results between the operating soft switch status information and the standard soft switch status information associated with the dual busbar operation mode, it performs the activation or deactivation operation on the main transformer protection operation associated switch; through the comprehensive acquisition and comparison of disconnector position information, the analysis and judgment of analog quantity information, and the automated comparison and operation of soft switch status, this invention realizes the automatic activation and deactivation of the main transformer protection output soft switch during busbar switching operations, solves the technical problem that currently requires on-site operation by operators, and improves the operating efficiency and reliability of the power system.

[0184] Please see Figure 5 , Figure 5 This is a structural block diagram of an automatic activation / deactivation device for a main transformer protection outlet soft pressure plate provided in Embodiment 3 of the present invention.

[0185] The present invention provides an automatic activation / deactivation device for the soft pressure plate at the main transformer protection outlet, comprising:

[0186] The data acquisition and monitoring module 301 is used to acquire the remote disconnector location information of the target substation in real time;

[0187] The response module 302 is used to obtain the first position criterion information and the second position criterion information of the main transformer bus side disconnector when the position of the disconnector on the main transformer bus side of the target substation changes.

[0188] The first processing module 303 is used to obtain the local disconnector position information and analog quantity information of the disconnector associated with the bus differential protection operation when the first position criterion information is consistent with the second position criterion information.

[0189] The second processing module 304 is used to determine whether the analog quantity information meets the preset differential current over-limit condition when the remote disconnector position information is consistent with the local disconnector position information.

[0190] The third processing module 305 is used to obtain the status information of the operating soft pressure plate of the main transformer protection operation associated switch and the current dual busbar operation mode if the analog quantity information does not meet the preset differential current over-limit conditions.

[0191] The activation / deactivation module 306 is used to activate or deactivate the main transformer protection associated switch based on the comparison results between the operating soft pressure plate status information and the standard soft pressure plate status information associated with the dual busbar operation mode.

[0192] Furthermore, the response module 302 includes:

[0193] The first position criterion information submodule is used to obtain the disconnector position information of the main transformer bus side disconnector using the electrical auxiliary contact discrimination method as the first position criterion information;

[0194] The second position criterion information submodule 306 is used to obtain the disconnector position information of the main transformer bus side disconnector by using the electrical auxiliary contact discrimination method and the sensor monitoring discrimination method as the second position criterion information.

[0195] Furthermore, the local disconnector location information includes the disconnector location information associated with the bus differential protection operation, obtained through electrical auxiliary contact discrimination method or sensor monitoring discrimination method;

[0196] The remote disconnector location information includes the disconnector location information associated with the bus differential protection operation obtained through the operation control system associated with the target substation.

[0197] Furthermore, the analog information includes the differential current values ​​of the first bus and the second bus;

[0198] The preset differential current over-limit condition is that the value of the small differential current of the first busbar is greater than the preset differential current abnormal setting value, or the value of the small differential current of the second busbar is greater than the preset differential current abnormal setting value.

[0199] Furthermore, the deployment / return operation module 306 includes:

[0200] The status holding submodule is used to maintain the current soft pressure plate status of the associated switch for main transformer protection operation when the running soft pressure plate status information matches the standard soft pressure plate status information.

[0201] The state switching submodule is used to perform the activation or deactivation operation of the main transformer protection associated switch according to the standard soft pressure plate status information when the running soft pressure plate status information is inconsistent with the standard soft pressure plate status information.

[0202] Furthermore, the dual busbar operation mode includes a first single busbar operation mode and a second single busbar operation mode.

[0203] In this invention, the remote disconnector position information of the target substation is acquired in real time. When the position of the disconnector on the main transformer busbar side of the target substation changes, the first position criterion information and the second position criterion information of the main transformer busbar side disconnector are acquired. When the first position criterion information and the second position criterion information are consistent, the local disconnector position information and analog quantity information associated with the busbar differential protection operation are acquired. When the remote disconnector position information and the local disconnector position information are consistent, it is determined whether the analog quantity information meets the preset differential current over-limit condition. If the analog quantity information does not meet the preset differential current over-limit condition, the main transformer differential protection operation is initiated. This invention obtains and compares the operating soft switch status information of the protection operation associated switch and the current dual busbar operation mode; based on the comparison results between the operating soft switch status information and the standard soft switch status information associated with the dual busbar operation mode, it performs the activation or deactivation operation on the main transformer protection operation associated switch; through the comprehensive acquisition and comparison of disconnector position information, the analysis and judgment of analog quantity information, and the automated comparison and operation of soft switch status, this invention realizes the automatic activation and deactivation of the main transformer protection output soft switch during busbar switching operations, solves the technical problem that currently requires on-site operation by operators, and improves the operating efficiency and reliability of the power system.

[0204] Please see Figure 6 , Figure 6 This is a structural block diagram of a computer device provided in Embodiment 4 of the present invention.

[0205] An electronic device according to an embodiment of the present invention includes: a memory 401 and a processor 402. The memory 402 stores a computer program. When the computer program is executed by the processor 402, the processor 402 performs the automatic activation / deactivation method of the main transformer protection outlet soft pressure plate as described in any of the above embodiments.

[0206] Memory 401 may be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM. Memory 401 has storage space 403 for program code 413 for performing any of the method steps described above. For example, storage space 403 for program code may include individual program codes 413 for implementing the various steps in the methods described above. This program code may be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, CDs, memory cards, or floppy disks. The program code may be compressed, for example, in a suitable form. When run by a computing processing device, this code causes the computing processing device to perform the various steps in the methods described above. This program code may be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, CDs, memory cards, or floppy disks. The program code may be compressed, for example, in a suitable form. When these codes are run by a computing device, the computing device causes the computing device to perform the various steps in the automatic activation / deactivation method of the main transformer protection outlet soft pressure plate described above.

[0207] Embodiment 5 of the present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the automatic activation / deactivation method of the main transformer protection outlet soft pressure plate as described in any of the above embodiments.

[0208] Embodiment 6 of the present invention also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions, wherein when the program instructions are executed by a computer, the computer performs the automatic activation / deactivation method of the main transformer protection outlet soft pressure plate as described in any of the above embodiments.

[0209] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0210] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between apparatuses or units, and may be electrical, mechanical, or other forms.

[0211] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0212] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0213] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0214] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for automatically engaging and disengaging the soft pressure plate at the main transformer protection outlet, characterized in that, include: Real-time acquisition of remote disconnector location information of the target substation; When the position of the disconnector on the main busbar side of the target substation changes, the first position criterion information and the second position criterion information of the disconnector on the main busbar side are obtained. When the first position criterion information matches the second position criterion information, the local disconnector position information and analog quantity information associated with the bus differential protection operation are obtained. When the remote disconnector location information matches the local disconnector location information, it is determined whether the analog quantity information meets the preset differential current over-limit condition. If the analog quantity information does not meet the preset differential current over-limit condition, then obtain the operating soft pressure plate status information of the main transformer protection operation associated switch and the current dual busbar operating mode. Based on the comparison results between the operating soft pressure plate status information and the standard soft pressure plate status information associated with the dual busbar operation mode, the main transformer protection operation associated switch is put into or taken out operation.

2. The automatic activation / deactivation method for the main transformer protection outlet soft pressure plate according to claim 1, characterized in that, The acquisition of the first position criterion information and the second position criterion information of the main transformer busbar side disconnect switch includes: The electrical auxiliary contact discrimination method is used to obtain the disconnector position information of the main transformer bus side disconnector as the first position criterion information; The position information of the disconnector on the main transformer bus side is obtained by using the electrical auxiliary contact discrimination method and the sensor monitoring discrimination method as the second position criterion information.

3. The automatic activation / deactivation method for the main transformer protection outlet soft pressure plate according to claim 1, characterized in that, The local disconnector location information includes disconnector location information associated with bus differential protection operation obtained through electrical auxiliary contact discrimination method or sensor monitoring discrimination method; The remote disconnector location information includes the disconnector location information of the disconnector associated with the bus differential protection operation obtained through the operation control system associated with the target substation.

4. The automatic activation / deactivation method for the main transformer protection outlet soft pressure plate according to claim 1, characterized in that, The analog quantity information includes the differential current value of the first bus and the differential current value of the second bus; The preset differential current over-limit condition is specifically that the value of the first bus differential current is greater than the preset differential current abnormal setting value, or the value of the second bus differential current is greater than the preset differential current abnormal setting value.

5. The automatic activation / deactivation method for the main transformer protection outlet soft pressure plate according to claim 1, characterized in that, The step of performing an on / off operation on the main transformer protection operation associated switch based on the comparison result between the operating soft pressure plate status information and the standard soft pressure plate status information associated with the dual busbar operation mode includes: When the running soft pressure plate status information matches the standard soft pressure plate status information, the current soft pressure plate status of the main transformer protection operation associated switch is maintained. If the status information of the operating soft pressure plate does not match the status information of the standard soft pressure plate, the main transformer protection operation associated switch is put into or taken out of operation according to the status information of the standard soft pressure plate.

6. The automatic activation / deactivation method for the main transformer protection outlet soft pressure plate according to any one of claims 1-5, characterized in that, The dual busbar operation mode includes a first single busbar operation mode and a second single busbar operation mode.

7. An automatic activation / deactivation device for the soft pressure plate at the main transformer protection outlet, based on the automatic activation / deactivation method for the soft pressure plate at the main transformer protection outlet as described in any one of claims 1-6, characterized in that, include: The data acquisition and monitoring module is used to acquire the remote disconnector location information of the target substation in real time; The response module is used to obtain the first position criterion information and the second position criterion information of the main transformer bus side disconnector when the position of the disconnector on the main transformer bus side of the target substation changes. The first processing module is used to obtain the local disconnector location information and analog quantity information of the disconnector associated with the bus differential protection operation when the first position criterion information is consistent with the second position criterion information. The second processing module is used to determine whether the analog quantity information meets the preset differential current over-limit condition when the remote disconnector position information is consistent with the local disconnector position information. The third processing module is used to obtain the operating soft pressure plate status information of the main transformer protection operation associated switch and the current dual busbar operation mode if the analog quantity information does not meet the preset differential current over-limit condition. The activation / deactivation module is used to activate or deactivate the main transformer protection associated switch based on the comparison result between the running soft pressure plate status information and the standard soft pressure plate status information associated with the dual busbar operation mode.

8. An electronic device, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor performs the steps of the automatic activation / deactivation method of the main transformer protection outlet soft pressure plate as described in any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed, it implements the automatic activation / deactivation method of the main transformer protection outlet soft pressure plate as described in any one of claims 1-6.

10. A computer program product, characterized in that, The computer program product includes a computer program stored on a non-transitory computer-readable storage medium, the computer program including program instructions, wherein when the program instructions are executed by a computer, the computer performs the automatic activation / deactivation method of the main transformer protection outlet soft pressure plate as described in any one of claims 1-6.

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