GOOSE (Generic Object Oriented Substation Event) communication line protection method of measurement and control device, equipment and medium

Abstract

The invention discloses a GOOSE communication line protection method and equipment of a measurement and control device and a medium, and the method comprises the steps: obtaining a GOOSE communication line, and synchronizing the sampling period of a GOOSE communication line channel; setting a GOOSE communication line channel identification code, and performing channel connection response according to the identification code; monitoring the connected GOOSE communication line, and determining the fault type of the GOOSE communication line; and determining the protection type of the GOOSE communication line according to the fault type. By synchronizing sampling periods of GOOSE communication line channels, accuracy of data on two sides is guaranteed, GOOSE communication line channel identification codes are set, channel connection response is carried out according to the identification codes, the position of a fault point can be rapidly and accurately determined, a tripping signal is sent to the position closest to the fault point, the override tripping phenomenon is effectively prevented, and the reliability of the system is improved. And the protection type of the GOOSE communication line is determined according to the fault type, so that accurate protection can be realized, the influence of the fault on the whole power supply system is reduced, and the continuity and reliability of power supply are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit protection, and in particular to a GOOSE communication line protection method, equipment and medium of a measurement and control device. Background Art

[0002] GOOSE communication provides a fast and reliable way to transmit information, allowing protection devices to respond promptly to events in the system, such as faults or status changes, thereby quickly executing protection actions. Through GOOSE communication, it is easier to add or modify protection devices and control logic in the system without making extensive changes to physical connections. GOOSE communication reduces dependence on traditional hard wiring and simplifies system maintenance and fault diagnosis.

[0003] The reason for protecting the GOOSE communication line is to ensure the reliability, real-time and safety of the relay protection system. The GOOSE protocol is used to transmit real-time information in smart substations, such as switch positions, blocking signals and tripping commands. The accurate and timely transmission of this information is crucial to the stable operation of the power system. The shortcomings of the existing technology mainly include the following aspects:

[0004] When faced with complex substation layouts, the traditional hard wiring method has complex wiring and is difficult to maintain. It is prone to failures and difficult to detect. It is unable to quickly and accurately determine the location of the fault point, so it is unable to promptly send a trip signal to the nearest location of the fault point, resulting in an over-tripping phenomenon. GOOSE messages may be interrupted in communication during transmission due to network problems, leading to data security issues. In a complex network environment, there will be security threats, resulting in doubts about the accuracy of the data, making it impossible to effectively perform protection judgments. By protecting the GOOSE communication lines, the above shortcomings can be overcome, the reliability, real-time nature and safety of relay protection can be improved, and the stable operation of the power system can be ensured. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the location of the fault point cannot be determined quickly and accurately, and the accuracy of the acquired data is low, resulting in the inability to effectively perform protection judgment. The purpose is to provide a GOOSE communication line protection method, device and medium for a measurement and control device, by synchronizing the sampling period of the GOOSE communication line channel to ensure the accuracy of the data on both sides, by setting the GOOSE communication line channel identification code, and performing the channel connection response according to the identification code, the fault point location can be quickly and accurately determined, and a tripping signal is sent to the nearest position of the fault point, effectively preventing the over-tripping phenomenon, and determining the protection type of the GOOSE communication line according to the fault type, so as to achieve precise protection, reduce the impact of the fault on the entire power supply system, and ensure the continuity and reliability of power supply.

[0006] The present invention is achieved through the following technical solutions:

[0007] A first aspect of the present invention provides a GOOSE communication line protection method of a measurement and control device, comprising the following specific steps:

[0008] Get the GOOSE communication line and synchronize the sampling period of the GOOSE communication line channel;

[0009] Set the GOOSE communication line channel identification code and respond to the channel connection according to the identification code;

[0010] Monitor the connected GOOSE communication lines and determine the fault type of the GOOSE communication lines;

[0011] Determine the protection type of the GOOSE communication line according to the fault type.

[0012] Further, the sampling period of the GOOSE communication line channel is synchronized, specifically including:

[0013] Obtain the devices on both sides of the line, and take one side as the local side and the other side as the opposite side;

[0014] The trapezoidal algorithm is used to calculate the sampling deviation based on the current side;

[0015] The sampling interval on the opposite side is adjusted according to the sampling deviation, and the sampling cycles of the devices on both sides of the line are synchronized.

[0016] Further, the setting of the GOOSE communication line channel identification code specifically includes:

[0017] Set the local identification code and the opposite identification code;

[0018] Send the identification code value of this side to the other side through the GOOSE communication line channel for verification;

[0019] If the verification is successful, the connection between this side and the other side is made.

[0020] Further, when monitoring the GOOSE communication line, it also includes:

[0021] In the GOOSE communication line, each frame of data received by this side needs to be checked by CRC, and the erroneous data is discarded or repaired according to the check result;

[0022] If the test result shows that the channel bit error rate is greater than the set threshold, a channel abnormality alarm message will be given, indicating that the channel is unreliable, and a channel abnormality alarm signal will be issued, and the differential protection will be locked.

[0023] Furthermore, the fault types of the GOOSE communication line include: GOOSE start failure, GOOSE start automatic transfer and GOOSE lock standby automatic transfer.

[0024] Furthermore, the protection types of the GOOSE communication line include: GOOSE communication line overcurrent protection, GOOSE communication line zero current protection, GOOSE communication bus overcurrent protection and GOOSE communication bus zero current protection.

[0025] Furthermore, the GOOSE communication line overcurrent protection and GOOSE communication line zero current protection specifically include the following steps:

[0026] Obtain the current of the opposite line protection device and compare it with the current on this side. When the current on this side reaches a fixed value and the current on the opposite side is not started, perform protection action:

[0027] Detect the fault current of the GOOSE communication line. When there is a fault current and when no GOOSE start signal is received from the opposite line, the circuit breaker on this side and the circuit breaker on the opposite side will be tripped after a delayed action.

[0028] Furthermore, the GOOSE communication bus overcurrent protection and GOOSE communication bus zero current protection specifically include the following steps:

[0029] Receive overcurrent and / or zero-current starting signals from the bus side. When a fault current is detected and no other GOOSE bus zero-current starting signals are received, the incoming, outgoing and bus tie circuit breakers of the bus are tripped after a delayed action.

[0030] A second aspect of the present invention provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, a GOOSE communication line protection method of a measurement and control device is implemented.

[0031] A third aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a GOOSE communication line protection method for a measurement and control device.

[0032] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0033] By synchronizing the sampling period of the GOOSE communication line channel to ensure the accuracy of the data on both sides, and by setting the GOOSE communication line channel identification code and responding to the channel connection according to the identification code, the fault point location can be quickly and accurately determined, and a tripping signal can be sent to the location closest to the fault point to effectively prevent over-tripping. The protection type of the GOOSE communication line is determined according to the fault type, which can achieve precise protection, reduce the impact of the fault on the entire power supply system, and ensure the continuity and reliability of power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0035] Figure 1 It is a flow chart of the GOOSE communication line protection method in an embodiment of the present invention;

[0036] Figure 2 It is a flow chart of the GOOSE communication line protection steps in an embodiment of the present invention;

[0037] Figure 3 Schematic diagram of the GOOSE communication line channel in an embodiment of the present invention. DETAILED DESCRIPTION

[0038] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0039] As a possible implementation, Figure 1 As shown, this embodiment provides a GOOSE communication line protection method for a measurement and control device, including the following specific steps: obtaining a GOOSE communication line, synchronizing the sampling period of the GOOSE communication line channel; setting a GOOSE communication line channel identification code, and performing a channel connection response according to the identification code; monitoring the connected GOOSE communication line to determine the fault type of the GOOSE communication line; and determining the protection type of the GOOSE communication line according to the fault type.

[0040] like Figure 2As shown, in this embodiment, by synchronizing the sampling period of the GOOSE communication line channel, the accuracy of the data on both sides is guaranteed, and by setting the GOOSE communication line channel identification code and performing the channel connection response according to the identification code, the fault point location can be quickly and accurately determined, and a tripping signal is sent to the position closest to the fault point, effectively preventing the over-tripping phenomenon, and determining the protection type of the GOOSE communication line according to the fault type, so as to achieve precise protection, reduce the impact of the fault on the entire power supply system, and ensure the continuity and reliability of power supply.

[0041] In some possible implementations, synchronizing the sampling period of the GOOSE communication line channel specifically includes:

[0042] Obtain the devices on both sides of the line, and take one side as the local side and the other side as the opposite side;

[0043] The trapezoidal algorithm is used to calculate the sampling deviation based on the current side;

[0044] The sampling interval on the opposite side is adjusted according to the sampling deviation, and the sampling cycles of the devices on both sides of the line are synchronized.

[0045] In some possible implementations, such as Figure 3 As shown, setting the GOOSE communication line channel identification code specifically includes: setting the local identification code and the opposite side identification code; sending the local identification code constant value to the opposite side through the GOOSE communication line channel and verifying it; if the verification is successful, connecting the local side and the opposite side.

[0046] The local identification code and the opposite identification code are the device protection settings, both ranging from 0 to 65535. The device sends the identification code setting to the opposite side through the optical fiber channel and verifies it to ensure that the channel connection of the protection device is correct. Therefore, the setting of the identification code should ensure the uniqueness of the protection equipment running in the entire network, that is, during normal operation, the local identification code and the opposite identification code should be different, and different from the identification code of another set of protection on this line, and should also be different from the identification code of other line protection devices.

[0047] When the device determines that the received identification code is inconsistent with the set identification code, the differential protection is blocked and the "device mixed connection" alarm is reported. When the device performs the protection verification self-loop test, the optical fiber physical channel should be self-looped and the identification code on this side should be set to be consistent with the identification code on the opposite side. At this time, if the identification code setting is inconsistent, the differential protection is blocked and the "channel self-loop status is inconsistent with the setting" alarm is reported.

[0048] In some possible implementations, the fault types of the GOOSE communication line include:

[0049] GOOSE startup failure: Protection actions include overcurrent protection, zero-sequence overcurrent protection, overcurrent acceleration protection, overload stage II protection, GOOSE communication line protection, GOOSE communication bus protection, failure protection and non-electrical quantity protection.

[0050] GOOSE starts automatic transfer: protection actions include GOOSE communication line overcurrent protection and GOOSE communication line zero current protection.

[0051] GOOSE locking standby automatic transfer: protection actions include GOOSE communication line overcurrent protection and GOOSE communication line zero current protection.

[0052] In some possible implementations, in the GOOSE communication line, each frame of data received on this side needs to undergo a CRC check, and the erroneous data is discarded or repaired based on the check result. If the channel bit error rate is greater than the set threshold, a channel abnormality warning message will be given, indicating that the channel is unreliable. When the channel bit error is serious or the channel is interrupted, a channel abnormality alarm signal will be given, and the differential protection will be locked. After the channel is restored, the protection is automatically put into operation.

[0053] In some possible implementations, the protection types of the GOOSE communication line include: GOOSE communication line overcurrent protection, GOOSE communication line zero current protection, GOOSE communication bus overcurrent protection and GOOSE communication bus zero current protection.

[0054] In some possible implementations, the GOOSE communication line overcurrent protection includes the following specific steps: setting a section of line overcurrent protection based on GOOSE communication, and setting independent current settings and time settings. Receive the current start signal of the line protection device on the opposite side of the ring network and compare it with this device. When the current of this device reaches the set value and the current on the opposite side has not started, the protection action trips the circuit breaker on this side, and sends a GOOSE trip signal to the opposite side. When the device on this side detects that the current of a certain phase is greater than the "GOOSE communication overcurrent setting", it sends a GOOSE current start signal for that phase. When the device detects a fault current and does not receive the GOOSE start signal from the device on the opposite side, it trips the circuit breakers on this side and the opposite side after a delayed action.

[0055] In some possible implementations, the GOOSE communication line zero-current protection includes the following specific steps: setting a section of line zero-current protection based on GOOSE communication, and setting independent current constants and time constants. Receive the current start signal of the line protection device on the opposite side of the ring network and compare it with this device. When the current of this device reaches the constant value and the current on the opposite side has not started, the protection action trips the circuit breaker on this side, and sends a GOOSE joint trip signal to the opposite side. When the device on this side detects that the current is greater than the "GOOSE communication zero-current constant", it sends a GOOSE zero-sequence current start signal. When the device detects a fault current and does not receive the GOOSE start signal from the device on the opposite side, it trips the circuit breakers on this side and the opposite side after a delayed action.

[0056] In some possible implementations, the GOOSE communication bus overcurrent protection specifically includes the following steps:

[0057] For each incoming and outgoing line interval of the same section of bus, a set of bus overcurrent protection based on GOOSE communication is configured, and independent current setting and time setting are set as the main protection of the bus. Each device receives the current start signal of all protection devices connected to the bus side. When the device detects the fault current and does not receive the GOOSE bus overcurrent start signal from other devices, it will trip the incoming and outgoing lines and bus tie circuit breakers of the bus after delayed action.

[0058] In some possible implementations, the communication bus zero-current protection includes the following specific steps: for each incoming and outgoing line interval of the same section of the bus, a set of bus zero-current protection based on GOOSE communication is configured, and independent current setting and time setting are set for use as bus protection. Each device receives the zero-current start signal of all protection devices connected to the bus side. When the device detects the fault current and does not receive the GOOSE bus zero-current start signal of other devices, the incoming and outgoing lines and bus tie circuit breakers of the bus are tripped after delayed action.

[0059] When the device detects that the current is greater than the "GOOSE communication bus zero-current protection setting", the GOOSE bus zero-current start signal is sent phase by phase.

[0060] In some possible implementations, GOOSE networked line overcurrent protection and GOOSE networked line zero current protection are configured in the incoming and outgoing line intervals as backup protection for optical fiber differential protection; and need to be used in conjunction with the overcurrent start GOOSE signal on the opposite side of the incoming / outgoing line.

[0061] In some possible implementations, GOOSE networked bus overcurrent protection and GOOSE networked bus zero-current protection are configured at the intervals between each incoming and outgoing line on the bus and used as the main protection of the bus; they need to be used in conjunction with the overcurrent start GOOSE signal of other branches on the bus (including incoming and outgoing lines, feeders and bus couplers).

[0062] In some possible implementations, specific protection operations of GOOSE when in use include:

[0063] When GOOSE communication is used as incoming / outgoing line protection:

[0064] Receive overcurrent and zero-current start signals on the opposite side of the input / output line to complete the overcurrent and zero-current protection function of the GOOSE communication line;

[0065] Receive the start-failure signals of adjacent incoming / outgoing lines, busbars and feeder lines, and complete the failure protection function of adjacent incoming / outgoing busbars and feeder lines;

[0066] Receive GOOSE tripping signals from the opposite side of the incoming / outgoing line and the busbar interval to complete the tripping function across intervals;

[0067] Receive the overcurrent and zero-current GOOSE start signals of the adjacent incoming / outgoing lines and bus couplers of the same bus section, and complete the GOOSE communication bus protection respectively;

[0068] Used as inlet / outlet line protection:

[0069] Send the overcurrent and zero-current start GOOSE signal on this side to the opposite side to complete the overcurrent and zero-current protection function of the GOOSE communication line of this incoming and outgoing line;

[0070] Send the GOOSE signal of the start failure of this interval to the adjacent incoming / outgoing lines and busbar protection to complete the failure protection function of this interval;

[0071] Send the overcurrent and zero current start GOOSE signal of this interval to the adjacent incoming / outgoing lines and busbar protection to complete the protection function of this section of the busbar;

[0072] When the relevant protection of this interval is actuated, a GOOSE tripping signal is sent to the opposite side to complete the joint tripping function of the opposite side;

[0073] Send the start automatic transfer and lock automatic transfer GOOE signal to the busbar automatic transfer device to complete the busbar automatic transfer function;

[0074] Used as feeder line protection:

[0075] Send the start failure GOOSE signal of this interval to the incoming / outgoing line and busbar protection to complete the failure protection function of this interval.

[0076] As a possible implementation, this embodiment provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, a GOOSE communication line protection method for a measurement and control device is implemented.

[0077] As a possible implementation, this embodiment provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, a GOOSE communication line protection method of a measurement and control device is implemented.

[0078] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A GOOSE communication line protection method for a measurement and control device, characterized in that: The specific steps include: Get the GOOSE communication line and synchronize the sampling period of the GOOSE communication line channel; Set the GOOSE communication line channel identification code and respond to the channel connection according to the identification code; Monitor the connected GOOSE communication lines and determine the fault type of the GOOSE communication lines; Determine the protection type of the GOOSE communication line according to the fault type.

2. The GOOSE communication line protection method of the measurement and control device according to claim 1 is characterized in that: The synchronizing of the sampling period of the GOOSE communication line channel specifically includes: Obtain the devices on both sides of the line, and take one side as the local side and the other side as the opposite side; The trapezoidal algorithm is used to calculate the sampling deviation based on the current side; The sampling interval on the opposite side is adjusted according to the sampling deviation, and the sampling cycles of the devices on both sides of the line are synchronized.

3. The GOOSE communication line protection method of the measurement and control device according to claim 2 is characterized in that: The setting of the GOOSE communication line channel identification code specifically includes: Set the local identification code and the opposite identification code; Send the identification code value of this side to the other side through the GOOSE communication line channel for verification; If the verification is successful, the connection between this side and the other side is made.

4. The GOOSE communication line protection method of the measurement and control device according to claim 2 is characterized in that: When monitoring the GOOSE communication line, it also includes: In the GOOSE communication line, each frame of data received by this side needs to be checked by CRC, and the erroneous data is discarded or repaired according to the check result; If the test result shows that the channel bit error rate is greater than the set threshold, a channel abnormality alarm message will be given, indicating that the channel is unreliable, and a channel abnormality alarm signal will be issued, and the differential protection will be locked.

5. The GOOSE communication line protection method of the measurement and control device according to claim 1 is characterized in that: The fault types of the GOOSE communication line include: GOOSE starting failure, GOOSE starting automatic transfer and GOOSE locking standby automatic transfer.

6. The GOOSE communication line protection method of the measurement and control device according to claim 1 is characterized in that: The protection types of the GOOSE communication line include: GOOSE communication line overcurrent protection, GOOSE communication line zero current protection, GOOSE communication bus overcurrent protection and GOOSE communication bus zero current protection.

7. The GOOSE communication line protection method of the measurement and control device according to claim 6 is characterized in that: The GOOSE communication line overcurrent protection and GOOSE communication line zero current protection specifically include the following steps: Obtain the current of the opposite line protection device and compare it with the current on this side. When the current on this side reaches a fixed value and the current on the opposite side is not started, perform protection action: Detect the fault current of the GOOSE communication line. When there is a fault current and when no GOOSE start signal is received from the opposite line, the circuit breaker on this side and the circuit breaker on the opposite side will be tripped after a delayed action.

8. The GOOSE communication line protection method of the measurement and control device according to claim 6 is characterized in that: The GOOSE communication bus overcurrent protection and GOOSE communication bus zero current protection specifically include the following steps: Receive overcurrent and / or zero-current starting signals from the bus side. When a fault current is detected and no other GOOSE bus zero-current starting signals are received, the incoming, outgoing and bus tie circuit breakers of the bus are tripped after a delayed action.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the GOOSE communication line protection method of the measurement and control device according to any one of claims 1 to 8 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the GOOSE communication line protection method of the measurement and control device according to any one of claims 1 to 8 is implemented.

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