CN113241735B - 10kV outgoing line backup protection method and system based on station domain information - Google Patents
10kV outgoing line backup protection method and system based on station domain information Download PDFInfo
- Publication number
- CN113241735B CN113241735B CN202110595150.1A CN202110595150A CN113241735B CN 113241735 B CN113241735 B CN 113241735B CN 202110595150 A CN202110595150 A CN 202110595150A CN 113241735 B CN113241735 B CN 113241735B
- Authority
- CN
- China
- Prior art keywords
- bus
- target line
- line
- protection
- outgoing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention provides a 10kV outgoing line backup protection method and a system based on station domain information, wherein the method comprises the following steps: monitoring the running state of a protection device of a target line outgoing from a 10kV side by adopting a heartbeat mechanism, and when the heartbeat is normal: if the running state is normal, ending the process, if the running state is abnormal, or when the heartbeat is overtime: detecting motion information of the formation-protecting directional element; if the action information is that the fault direction does not point to the 10kV bus or a protection direction element of a non-target line with a 10kV side outgoing line judges that the fault direction points to the non-target line, ending the process; otherwise, sending an instruction to a circuit breaker of a target line outgoing from the 10kV side. According to the scheme, the action information of the directional elements of the transformer substation for stratum transformer protection and other line protection is collected, the task of removing faults is comprehensively analyzed, judged and matched, and the quick backup protection function is realized.
Description
Technical Field
The invention relates to the technical field of substation protection, in particular to a 10kV outgoing line backup protection method and system based on substation area information.
Background
The traditional relay protection only utilizes the electric quantity and the limited state quantity to finish fault judgment, cannot reflect the whole operation condition of a power grid, and lacks coordination and cooperation, so that the basic concept of station domain protection is provided.
However, when the on-site line protection device on the 10kV outgoing line of the intelligent substation equipped with the substation area protection fails, the fault on the 10kV outgoing line cannot be removed quickly, especially, the 10kV outgoing lines are usually many, and the data volume required for collecting voltage or current information of each outgoing line to construct the substation area backup protection is too large, which is not easy to implement.
Disclosure of Invention
The invention provides a 10kV outgoing line backup protection method and system based on station domain information, which improve the accuracy of fault identification and realize a quick backup protection function under the condition that a local outgoing line protection device fails.
The invention provides a 10kV outgoing line backup protection method based on station domain information, which comprises the following steps:
monitoring the running state of a protection device of a target line outgoing from a 10kV side by adopting a heartbeat mechanism, wherein when the heartbeat is normal: if the running state of the protection device of the target line is normal, ending the process, and if the running state of the protection device of the target line is abnormal, or when the heartbeat is out of date: detecting motion information of the formation-protecting directional element;
if the action information of the directional element for protecting any transformer connected with the 10kV bus on the stratum is that the fault direction does not point to the 10kV bus, or the protection directional element of the non-target line with the 10kV side outgoing line judges that the fault direction points to the non-target line, ending the process; otherwise, sending an instruction to a circuit breaker of a target line outgoing from the 10kV side.
Further, after the sending of the instruction to the circuit breaker of the target line outgoing from the 10kV side, the method further includes:
receiving feedback information of a circuit breaker of the target line; if the feedback information meets any condition, ending the process; otherwise, sending an instruction to a 10kV bus sectional breaker;
the first condition is as follows: the voltage variation of the 10kV bus is larger than a first preset threshold;
and a second condition: the current variation of the low-voltage side of the transformer connected with the 10kV bus is larger than a second preset threshold value;
and (3) carrying out a third condition: the protection direction element of the transformer connected with the 10kV bus does not point to the 10kV bus.
Further, after sending the instruction to the sectionalizing circuit breaker of the 10kV bus, the method further includes:
receiving action information of a protected directional element of each transformer connected with a 10kV bus; if the action information of the directional element points to the 10kV bus, sending an instruction to a low-voltage side circuit breaker of a transformer for protecting the directional element and all outgoing line circuit breakers on the 10kV bus connected with the low-voltage side circuit breaker; otherwise, the process is ended.
Further, if the feedback information satisfies any of the following conditions, ending the process, including: the fault of the target line which occurs at the outgoing line of the 10kV side has been cut off.
Further, if the action information of the directional element protected by any transformer connected with the 10kV bus in terms of the ground layer is that the fault direction does not point to the 10kV bus, or the protection directional element of the non-target line with the 10kV side outgoing line judges that the fault direction points to the non-target line itself, the process is ended, including: and the target line of the outgoing line at the 10kV side has no fault.
The second aspect of the present invention further provides a 10kV outgoing line backup protection system based on station domain information, including:
the running state monitoring module is used for monitoring the running state of the protection device of the target line outgoing from the 10kV side by adopting a heartbeat mechanism, and when the heartbeat is normal: if the running state of the protection device of the target line is normal, ending the process, and if the running state of the protection device of the target line is abnormal, or when the heartbeat is out of date: detecting motion information of the formation-protecting directional element;
the target line fault judgment module is used for ending the process if the action information of the directional element protected by any transformer connected with the 10kV bus in terms of the stratum is that the fault direction does not point to the 10kV bus or the protection directional element of the non-target line with the 10kV side outgoing line judges that the fault direction points to the non-target line; otherwise, sending an instruction to a circuit breaker of a target line outgoing from the 10kV side.
Further, the 10kV outgoing line backup protection system based on station domain information further includes:
the circuit breaker information feedback module is used for receiving feedback information of a circuit breaker of the target line; if the feedback information meets the following arbitrary conditions, ending the process; otherwise, sending an instruction to a 10kV bus sectional breaker;
the first condition is as follows: the voltage variation of the 10kV bus is larger than a first preset threshold;
and a second condition: the current variation of the low-voltage side of the transformer connected with the 10kV bus is larger than a second preset threshold value;
and (3) carrying out a third condition: the protection direction element of the transformer connected with the 10kV bus does not point to the 10kV bus.
Further, the 10kV outgoing line backup protection system based on station domain information further includes:
the bus fault judgment module is used for receiving action information of a protected directional element of each transformer connected with the 10kV bus; if the protective directional element of one transformer points to the 10kV bus, sending an instruction to a low-voltage side circuit breaker of the transformer and all outgoing line circuit breakers on the 10kV bus connected with the low-voltage side circuit breaker; otherwise, ending the process.
Further, if the feedback information satisfies any of the following conditions, ending the process, including: the fault of the target line occurring at the 10kV side outgoing line has been cut off.
Further, if the action information of the directional element protected by any transformer connected with the 10kV bus in terms of the ground layer is that the fault direction does not point to the 10kV bus, or the protection directional element of the non-target line with the 10kV side outgoing line judges that the fault direction points to the non-target line itself, the process is ended, including: and the target line of the outgoing line at the 10kV side has no fault.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a 10kV outgoing line backup protection method and a system based on station domain information, wherein the method comprises the following steps: monitoring the running state of a protection device of a target line outgoing from a 10kV side by adopting a heartbeat mechanism, wherein when the heartbeat is normal: if the running state of the protection device of the target line is normal, ending the process, and if the running state of the protection device of the target line is abnormal, or when the heartbeat is out of date: detecting motion information of the formation-protective directional element; if the action information of the directional element for protecting any transformer connected with the 10kV bus on the stratum is that the fault direction does not point to the 10kV bus, or the protection directional element of the non-target line with the 10kV side outgoing line judges that the fault direction points to the non-target line, ending the process; otherwise, sending an instruction to a circuit breaker of a target line outgoing from the 10kV side. According to the scheme, by means of the 10kV outgoing line backup protection method based on the station domain information, under the condition that a line on-site protection device generating device fails, the action information of directional elements of on-site transformer protection and other line protection of a transformer substation is collected, and comprehensive analysis, judgment and cooperation are performed, so that the task of removing faults can be completed, and the function of quick backup protection is realized.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required to be used in the embodiments will be briefly described below, and obviously, the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a 10kV outgoing line backup protection method based on station domain information according to an embodiment of the present invention;
fig. 2 is a flowchart of a 10kV outgoing line backup protection method based on station domain information according to another embodiment of the present invention;
fig. 3 is a flowchart of a 10kV outgoing line backup protection method based on station domain information according to still another embodiment of the present invention;
fig. 4 is a device diagram of a 10kV outgoing line backup protection system based on station domain information according to an embodiment of the present invention;
fig. 5 is a device diagram of a 10kV outgoing line backup protection system based on station domain information according to another embodiment of the present invention;
fig. 6 is a device diagram of a 10kV outgoing line backup protection system based on station domain information according to still another embodiment of the present invention;
fig. 7 is a block diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the step numbers used herein are for convenience of description only and are not intended as limitations on the order in which the steps are performed.
It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The terms "comprises" and "comprising" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The term "and/or" refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.
A first aspect.
Referring to fig. 1-3, an embodiment of the present invention provides a 10kV outgoing line backup protection method based on station domain information, including:
s10, monitoring the running state of the protection device of the target line outgoing from the 10kV side by adopting a heartbeat mechanism, and when the heartbeat is normal: if the running state of the protection device of the target line is normal, ending the process, and if the running state of the protection device of the target line is abnormal, or when the heartbeat is out of date: motion information of the formation-protective directional element is detected.
It should be noted that, if the operating state of the protection device of the target line is abnormal, it indicates that the protection device of the target line outgoing from the 10kV side is failed.
And monitoring the running state of the protection device of the target line outgoing from the 10kV side by adopting a heartbeat mechanism, and if the heartbeat is overtime, indicating that the protection device of the target line outgoing from the 10kV side is possibly invalid.
S20, if the action information of the directional element protected by any transformer connected with the 10kV bus in terms of the stratum is that the fault direction does not point to the 10kV bus, or the protection directional element of the non-target line with the 10kV side outgoing line judges that the fault direction points to the non-target line, ending the process; otherwise, sending an instruction to a circuit breaker of a target line outgoing from the 10kV side.
In a specific embodiment, if the directional element action information of the protection of any transformer whose ground layer is connected to the 10kV bus indicates that the fault direction does not point to the 10kV bus, or the protection directional element of the non-target line with the 10kV side outgoing line determines that the fault direction points to the non-target line itself, the ending process includes: and the target line of the outgoing line at the 10kV side has no fault.
It should be noted that, the circuit breaker that sends the instruction to the target line that is outgoing at the 10kV side specifically is:
after a delay of Δ tiSending an instruction, Δ t, to the circuit breaker of the target lineiAnd the action time of the longest delay backup protection of the target line is obtained.
In a specific embodiment, the method further comprises:
s30, receiving feedback information of the circuit breaker of the target circuit; if the feedback information meets the following arbitrary conditions, ending the process; otherwise, sending an instruction to a sectional breaker of the 10kV bus.
Specifically, the conditions include:
the first condition is as follows: the voltage variation of the 10kV bus is larger than a first preset threshold value.
It should be noted that, the voltage variation of the 10kV bus is greater than a first preset threshold, specifically:
ΔU＝|Ut-Ut′|>ΔUopwherein U istAnd U'tRespectively 10kV bus voltage amplitude, delta U, at the current moment and before sending instructions to the circuit breaker of the target lineopAnd the delta U is a first preset threshold value and is a voltage variation of the 10kV bus.
And a second condition: and the current variation of the low-voltage side of the transformer connected with the 10kV bus is larger than a second preset threshold value.
It should be noted that the current variation on the low-voltage side of the transformer connected to the 10kV bus is greater than a second preset threshold, specifically:
ΔI＝|It-It′|>ΔIopin which ItAnd l'tThe current amplitude, delta I, of the low-voltage side of the transformer at the current moment and before the trip command is sent to the circuit breaker of the target line respectivelyopThe value is a threshold value, and delta I is the current variation of the low-voltage side of a transformer connected with a 10kV bus;
and (3) carrying out a third condition: the protection direction element of the transformer connected with the 10kV bus does not point to the 10kV bus.
It should be noted that since the circuit breaker of the target line may fail or a fault occurs on the 10kV bus, a command is sent to the sectionalizing circuit breaker of the 10kV bus.
In a specific embodiment, if the feedback information satisfies any of the following conditions, the process is terminated, which indicates that the fault of the target line that is outgoing at the 10kV side has been removed.
In a specific embodiment, the method further comprises:
s40, receiving action information of the protected directional element of each transformer connected with the 10kV bus; if the action information of the directional element points to the 10kV bus, sending an instruction to a low-voltage side circuit breaker of a transformer for protecting the directional element and all outgoing line circuit breakers on the 10kV bus connected with the low-voltage side circuit breaker; otherwise, ending the process.
After the segmented circuit breakers are tripped, the action information of the directional elements protected by each transformer connected with the 10kV bus in the station is judged one by one, and if the directional element protected by a certain transformer points to the 10kV bus, which indicates that a fault occurs in the direction of the 10kV bus, an instruction is sent to all outgoing circuit breakers on the low-voltage side of the transformer and the 10kV bus.
According to the method, under the condition that a line on-site protection device generating device fails, the action information of directional elements of the transformer substation on-site layer transformer protection and other line protection is collected, and comprehensive analysis, judgment and matching are performed, so that the task of removing faults can be completed, and the rapid backup protection function is realized.
In a specific embodiment, the invention provides a 10kV outgoing line backup protection method based on station domain information, which includes (steps S1 to S2 do not distinguish between them):
s1: and the station domain protection detects whether the 'device failure' information sent by the line protection device of the 10kV side outgoing line i is received. If the station domain protection receives the "device failure" information of the outgoing line i, the process jumps to S4.
It should be noted that, if the station domain protection receives the "device failure" information of the outgoing line i, it indicates that the line protection device of the outgoing line i fails.
S2: the substation area protection detects the time difference from the 'device normal' information sent at the last moment of the line protection device receiving the 10kV side outgoing line i to the current moment. If the time difference from the 'device normal' information sent at the last moment of the outgoing line i to the current moment is more than t2(t2Greater than t1) And the GOOSE network is normal, go to S4.
It should be noted that, if the time difference from the "device normal" message sent at the time on the output line i to the current time is greater than t2(t2 is greater than t1) and the in-station GOOSE network is normal, it indicates that the line protection device of the output line i may fail and thus the "device normal" message cannot be sent at the timing t 1.
S3: jump to S9.
S4: the station domain protection detects directional element action information of the local layer protection. And jumping to S9 if the fault direction is judged not to point to the 10kV bus by any one of the directional elements protected by the transformer with the ground layer connected with the 10kV bus or the fault direction is judged to point to the line by any one of the line protection directional elements of the 10kV outgoing line except the outgoing line i.
It should be noted that if it is determined that the fault direction does not point to the 10kV bus by any transformer-protected directional element whose ground layer is connected to the 10kV bus, or it is determined that the fault direction points to the line by any 10kV outgoing line-protected directional element other than the outgoing line i, it is determined that the outgoing line i direction is not faulty.
S5: station area protection elapsed time delta tiAnd sending a tripping command to the circuit breaker of the line i.
It should be noted that the station domain protection is delayed by Δ tiSending a trip command, Δ t, to the circuit breaker of line iiAct of longest delay backup protection for outgoing line iTime of day.
S6: the station area protection judges whether (1) the voltage variation of the 10kV bus is larger than a threshold value; (2) the current variation of the low-voltage side of the transformer connected with the 10kV bus is larger than a threshold value; (3) the transformer connected with the 10kV bus protects the directional element from pointing to the 10kV bus. If any of the above three conditions is satisfied, the process proceeds to S9.
The station area protection determines whether (1) the voltage variation of the 10kV bus is greater than a threshold value, and Δ U ═ U |, Ut-Ut′|>ΔUopWherein U istAnd U'tThe 10kV bus voltage amplitude, delta U, before the tripping command is sent to the circuit breaker of the outgoing line i at the current moment respectivelyopIs a threshold value; (2) the current variation of the low-voltage side of the transformer connected with the 10kV bus is larger than a threshold value, and delta I is equal to It-It′|>ΔIopIn which ItAnd l'tThe current amplitude, delta I, of the low-voltage side of the transformer before sending a tripping command to the circuit breaker of the outgoing line I at the current moment respectivelyopIs a threshold value; (3) the transformer connected with the 10kV bus protects the directional element from pointing to the 10kV bus. If any one of the three conditions is met, the fault is generated on the outgoing line i and is cut off, and S9 is skipped to finish the process; otherwise, the circuit breaker indicating the outlet i may malfunction or a fault occurs on the 10kV bus.
S7: and the station area protection sends a tripping command to a sectional breaker of a 10kV bus.
It should be noted that, since the circuit breaker of the outgoing line i may malfunction or a fault occurs on the 10kV bus, the station area protection sends a trip command to the sectionalized circuit breaker of the 10kV bus.
S8: the substation area protection judges the action information of the directional elements protected by each transformer connected with the 10kV bus one by one in the substation, and if the directional element protected by a certain transformer points to the 10kV bus, a jump order is sent to all outgoing line circuit breakers on the low-voltage side of the transformer and the section of the 10kV bus.
After tripping off the segmented circuit breakers, the station protection judges the action information of the directional elements protected by each transformer connected with the 10kV bus in the station one by one, and if the directional element protected by a certain transformer points to the 10kV bus, which indicates that a fault occurs in the direction of the 10kV bus, a tripping order is sent to all outgoing circuit breakers on the low-voltage side of the transformer and the 10kV bus.
S9: and ending the process.
According to the method, proper protection is configured in a station domain protection system of the intelligent substation, action information of directional elements of on-site transformer protection and line protection of the substation is collected, comprehensive analysis, judgment and cooperation are performed, and a station domain backup protection function of rapidly and reliably removing faults under the condition that a line on-site protection device fails is achieved.
A second aspect.
Referring to fig. 4-6, an embodiment of the present invention provides a 10kV outgoing line backup protection system based on station domain information, including:
the running state monitoring module 10 is configured to monitor a running state of a protection device of a target line outgoing from a 10kV side by using a heartbeat mechanism, and when the heartbeat is normal: if the running state of the protection device of the target line is normal, ending the process, and if the running state of the protection device of the target line is abnormal, or when the heartbeat is out of date: motion information of the formation-protective directional element is detected.
It should be noted that, if the operating state of the protection device of the target line is abnormal, it indicates that the protection device of the target line outgoing from the 10kV side is failed.
And monitoring the running state of the protection device of the target line outgoing from the 10kV side by adopting a heartbeat mechanism, and if the heartbeat is overtime, indicating that the protection device of the target line outgoing from the 10kV side is possibly invalid.
The target line fault judgment module 20 is configured to end the process if the directional element action information of any one transformer protection device connected to the ground layer and the 10kV bus indicates that the fault direction does not point to the 10kV bus, or the protection directional element of the non-target line with the 10kV side outgoing line judges that the fault direction points to the non-target line itself; otherwise, sending an instruction to a circuit breaker of a target line outgoing from the 10kV side.
In a specific embodiment, if the directional element action information of the protection of any transformer whose ground layer is connected to the 10kV bus indicates that the fault direction does not point to the 10kV bus, or the protection directional element of the non-target line with the 10kV side outgoing line determines that the fault direction points to the non-target line itself, the ending process includes: and the target line of the outgoing line at the 10kV side has no fault.
It should be noted that, the circuit breaker that sends an instruction to a target line of a 10kV side outgoing line specifically includes:
after a delay of Δ tiSending a command, Δ t, to the circuit breaker of the target lineiAnd the action time of the longest delay backup protection of the target line is obtained.
In a specific embodiment, the method further comprises:
a circuit breaker information feedback module 30, configured to receive feedback information of a circuit breaker of the target line; if the feedback information meets the following arbitrary conditions, ending the process; otherwise, sending an instruction to a sectional breaker of the 10kV bus.
Specifically, the conditions include:
the first condition is as follows: the voltage variation of the 10kV bus is larger than a first preset threshold value.
It should be noted that, the voltage variation of the 10kV bus is greater than a first preset threshold, specifically:
ΔU＝|Ut-Ut′|>ΔUopwherein U istAnd U'tRespectively 10kV bus voltage amplitude, delta U, at the current moment and before sending instructions to the circuit breaker of the target lineopAnd the delta U is a first preset threshold value and is a voltage variation of the 10kV bus.
And a second condition: and the current variation of the low-voltage side of the transformer connected with the 10kV bus is larger than a second preset threshold value.
It should be noted that the variation of the current at the low voltage side of the transformer connected to the 10kV bus is greater than a second preset threshold, specifically:
ΔI＝|It-It′|>ΔIopin which ItAnd l'tThe current amplitude, delta I, of the low-voltage side of the transformer at the current moment and before the trip command is sent to the circuit breaker of the target line respectivelyopThe value is a threshold value, and delta I is the current variation of the low-voltage side of a transformer connected with a 10kV bus;
and (3) carrying out a third condition: the protection direction element of the transformer connected with the 10kV bus does not point to the 10kV bus.
It should be noted that since the circuit breaker of the target line may fail or a fault occurs on the 10kV bus, a command is sent to the sectionalizing circuit breaker of the 10kV bus.
In a specific embodiment, if the feedback information satisfies any of the following conditions, the process is terminated, which indicates that the fault of the target line that is outgoing at the 10kV side has been removed.
In a specific embodiment, the method further comprises:
the bus fault judgment module 40 is used for receiving action information of a protected directional element of each transformer connected with the 10kV bus; if the protective directional element of one transformer points to the 10kV bus, sending an instruction to a low-voltage side circuit breaker of the transformer and all outgoing line circuit breakers on the 10kV bus connected with the low-voltage side circuit breaker; otherwise, ending the process.
After the segmented circuit breakers are tripped, the action information of the directional elements protected by each transformer connected with the 10kV bus in the station is judged one by one, and if the directional element protected by a certain transformer points to the 10kV bus, which indicates that a fault occurs in the direction of the 10kV bus, an instruction is sent to all outgoing circuit breakers on the low-voltage side of the transformer and the 10kV bus.
According to the system, under the condition that the line on-site protection device generating device fails, the action information of directional elements of the transformer protection of the on-site layer of the transformer substation and other line protection is acquired, and the comprehensive analysis, judgment and matching are performed, so that the task of removing faults can be completed, and the quick backup protection function is realized.
In a third aspect.
The present invention provides an electronic device, including:
a processor, a memory, and a bus;
the bus is used for connecting the processor and the memory;
the memory is used for storing operation instructions;
the processor is configured to call the operation instruction, and the executable instruction enables the processor to execute an operation corresponding to the 10kV outgoing line backup protection method based on the station domain information, as shown in the first aspect of the present application.
In an alternative embodiment, an electronic device is provided, as shown in fig. 7, the electronic device 5000 shown in fig. 7 includes: a processor 5001 and a memory 5003. The processor 5001 and the memory 5003 are coupled, such as via a bus 5002. Optionally, the electronic device 5000 may also include a transceiver 5004. It should be noted that the transceiver 5004 is not limited to one in practical application, and the structure of the electronic device 5000 is not limited to the embodiment of the present application.
The processor 5001 may be a CPU, general purpose processor, DSP, ASIC, FPGA or other programmable logic device, transistor logic device, hardware component, or any combination thereof. Which may implement or execute the various illustrative logical blocks, modules, and circuits described in connection with the disclosure herein. The processor 5001 may also be a combination of processors implementing computing functionality, e.g., a combination comprising one or more microprocessors, a combination of DSPs and microprocessors, or the like.
The memory 5003 may be, but is not limited to, a ROM or other type of static storage device that can store static information and instructions, a RAM or other type of dynamic storage device that can store information and instructions, an EEPROM, a CD-ROM or other optical disk storage, optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
The memory 5003 is used for storing application program codes for executing the present solution, and the execution is controlled by the processor 5001. The processor 5001 is configured to execute application program code stored in the memory 5003 to implement the teachings of any of the foregoing method embodiments.
Among them, electronic devices include but are not limited to: mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and the like, and fixed terminals such as digital TVs, desktop computers, and the like.
A fourth aspect.
The invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements a 10kV outgoing line backup protection method based on station domain information as shown in the first aspect of the present application.
Yet another embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, which, when run on a computer, enables the computer to perform the corresponding content of the foregoing method embodiments.
Claims (6)
1. A10 kV outgoing line backup protection method based on station domain information is characterized by comprising the following steps:
monitoring the running state of a protection device of a target line outgoing from a 10kV side by adopting a heartbeat mechanism, wherein when the heartbeat is normal: if the running state of the protection device of the target line is normal, ending the process, and if the running state of the protection device of the target line is abnormal, or when the heartbeat is out of date: detecting motion information of the formation-protecting directional element;
if the action information of any transformer protection direction element connected with the 10kV bus on the stratum is that the fault direction does not point to the 10kV bus, or the protection direction element of the non-target line with the 10kV side outgoing line judges that the fault direction points to the non-target line, the process is ended; otherwise, sending an instruction to a circuit breaker of a target line outgoing from the 10kV side;
after the instruction is sent to the circuit breaker of the target line outgoing from the 10kV side, the method further comprises the following steps:
receiving feedback information of a circuit breaker of the target line; if the feedback information meets the following arbitrary conditions, ending the process; otherwise, sending an instruction to a 10kV bus sectional breaker;
the first condition is as follows: the voltage variation of the 10kV bus is larger than a first preset threshold;
and (2) carrying out a second condition: the current variation of the low-voltage side of the transformer connected with the 10kV bus is larger than a second preset threshold value;
and (3) performing a third condition: a transformer protection direction element connected with the 10kV bus does not point to the 10kV bus;
sending an instruction to a sectional breaker of a 10kV bus, and receiving action information of each transformer protection direction element connected with the 10kV bus;
if one transformer protection direction element points to the 10kV bus, sending an instruction to a low-voltage side circuit breaker of the transformer and all outgoing line circuit breakers on the 10kV bus connected with the low-voltage side circuit breaker; otherwise, ending the process.
2. The 10kV outgoing line backup protection method based on station domain information of claim 1, wherein ending the process if the feedback information satisfies any of the following conditions, comprises: the fault of the target line which occurs at the outgoing line of the 10kV side has been cut off.
3. The 10kV outgoing line backup protection method based on station domain information, according to claim 1, wherein if the action information of any one transformer protection direction element connected with the ground layer and the 10kV bus is that the fault direction does not point to the 10kV bus, or the protection direction element of a non-target line with an outgoing line on the 10kV side judges that the fault direction points to the non-target line, the process is ended, which comprises: and the target line of the outgoing line at the 10kV side has no fault.
4. The utility model provides a 10kV backup protection system that is qualified for next round of competitions based on station territory information which characterized in that includes:
the running state monitoring module is used for monitoring the running state of the protection device of the target line outgoing from the 10kV side by adopting a heartbeat mechanism, and when the heartbeat is normal: if the running state of the protection device of the target line is normal, ending the process, and if the running state of the protection device of the target line is abnormal, or when the heartbeat is out of date: detecting motion information of the formation-protecting directional element;
the target line fault judgment module is used for ending the process if the action information of any transformer protection direction element connected with the 10kV bus in terms of the stratum is that the fault direction does not point to the 10kV bus or a protection direction element of a non-target line with a 10kV side outgoing line judges that the fault direction points to the non-target line; otherwise, sending an instruction to a circuit breaker of a target line outgoing from the 10kV side;
the circuit breaker information feedback module is used for receiving feedback information of a circuit breaker of the target line; if the feedback information meets the following arbitrary conditions, ending the process; otherwise, sending an instruction to a 10kV bus sectional breaker;
the first condition is as follows: the voltage variation of the 10kV bus is larger than a first preset threshold;
and a second condition: the current variation of the low-voltage side of the transformer connected with the 10kV bus is larger than a second preset threshold value;
and (3) carrying out a third condition: a transformer protection direction element connected with the 10kV bus does not point to the 10kV bus;
the bus fault judgment module is used for sending an instruction to a 10kV bus sectional breaker and then receiving action information of each transformer protection direction element connected with the 10kV bus;
if one transformer protection direction element points to the 10kV bus, sending an instruction to a low-voltage side circuit breaker of the transformer and all outgoing line circuit breakers on the connected 10kV bus; otherwise, ending the process.
5. The 10kV outgoing line backup protection system based on station domain information of claim 4, wherein ending the process if the feedback information satisfies any of the following conditions comprises: the fault of the target line which occurs at the outgoing line of the 10kV side has been cut off.
6. The 10kV outgoing line backup protection system based on station domain information, according to the action information of any one transformer protection direction element connected with the 10kV bus, if the fault direction does not point to the 10kV bus or the protection direction element of the non-target line with the outgoing line at the 10kV side judges that the fault direction points to the non-target line, the process is ended, and the method comprises the following steps: and the target line of the outgoing line at the 10kV side has no fault.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110595150.1A CN113241735B (en) | 2021-05-28 | 2021-05-28 | 10kV outgoing line backup protection method and system based on station domain information |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110595150.1A CN113241735B (en) | 2021-05-28 | 2021-05-28 | 10kV outgoing line backup protection method and system based on station domain information |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113241735A CN113241735A (en) | 2021-08-10 |
| CN113241735B true CN113241735B (en) | 2022-06-17 |
Family
ID=77135669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110595150.1A Active CN113241735B (en) | 2021-05-28 | 2021-05-28 | 10kV outgoing line backup protection method and system based on station domain information |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113241735B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103779841A (en) * | 2014-01-14 | 2014-05-07 | 国家电网公司 | Substation area backup protection method based on combination of direction comparison and current differential |
| CN105262064A (en) * | 2015-10-29 | 2016-01-20 | 浙江大学 | Substation area backup protection method used for simplifying transformer in-place backup protection |
| CN108493905A (en) * | 2018-02-28 | 2018-09-04 | 国网山东省电力公司电力科学研究院 | A kind of intelligent substation station domain back-up protection method |
| CN108777476A (en) * | 2018-06-26 | 2018-11-09 | 浙江大学 | A kind of locality protection method of the access of distributed generation resource containing inverter type power distribution network |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849032B (en) * | 2017-04-11 | 2019-12-20 | 许继集团有限公司 | Station domain expansion differential protection method and system for coping with information loss |
| CN107015123B (en) * | 2017-06-06 | 2019-09-27 | 云南电网有限责任公司 | A kind of accurate determination method of transmission line malfunction based on recorder data |
-
2021
- 2021-05-28 CN CN202110595150.1A patent/CN113241735B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103779841A (en) * | 2014-01-14 | 2014-05-07 | 国家电网公司 | Substation area backup protection method based on combination of direction comparison and current differential |
| CN105262064A (en) * | 2015-10-29 | 2016-01-20 | 浙江大学 | Substation area backup protection method used for simplifying transformer in-place backup protection |
| CN108493905A (en) * | 2018-02-28 | 2018-09-04 | 国网山东省电力公司电力科学研究院 | A kind of intelligent substation station domain back-up protection method |
| CN108777476A (en) * | 2018-06-26 | 2018-11-09 | 浙江大学 | A kind of locality protection method of the access of distributed generation resource containing inverter type power distribution network |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113241735A (en) | 2021-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20120140365A1 (en) | Dual-comparator restricted earth fault protection | |
| Jena et al. | A new decentralized approach to wide-area back-up protection of transmission lines | |
| Das et al. | Prediction and control of transient stability using system integrity protection schemes | |
| CN110739661A (en) | overcurrent protection device and board card | |
| CN105655996A (en) | Component fault tripping distinguishing method and component fault tripping distinguishing device for stable control | |
| CN101860004B (en) | Power disconnect system and method | |
| CN113241735B (en) | 10kV outgoing line backup protection method and system based on station domain information | |
| Goh et al. | DSP based fuzzy and conventional overcurrent relay controller comparisons | |
| Zin et al. | Effect of 132kV cross-country fault on distance protection system | |
| Kamyab et al. | Development of a hybrid method to assess grid-related LOOP scenarios for an NPP | |
| Rahman et al. | Cyber vulnerabilities on agent-based smart grid protection system | |
| CN114157018B (en) | Distributed feeder automation recovery method based on line load rate and peer-to-peer communication | |
| CN110112745A (en) | Electric network information physical system means of defence, device, equipment and storage medium | |
| CN112928739A (en) | Line protection starting method and system suitable for impact load | |
| CN111781466A (en) | Fault positioning system and method for arc suppression coil grounding power grid | |
| Henville et al. | Dynamic simulations challenge protection performance | |
| CN113067314B (en) | Substation area protection method and device for coping with voltage loss of direct-current power supply for substation | |
| Lee et al. | Development of auto-reclosing algorithm using multi agent system | |
| CN105866572B (en) | Automatic generation system for series compensation protection action and working method thereof | |
| CN110970878B (en) | Method for improving band-limited time current quick-break precision based on mean filtering | |
| Wang et al. | An auto‐reclosing scheme for DC circuit breaker in VSC‐HVDC transmission system | |
| KOKSAL et al. | A reliability-transient stability analysis of power systems for protection system conditions | |
| Iwaki et al. | System integrity protection scheme based on on-line transient stability calculation using protection relay device hardware | |
| Guha et al. | Real-Time Supervised Load Shedding Reconfiguration to Avoid Transient Cascading Failures | |
| CN108988302B (en) | Bus tie circuit processing method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |