CN114336500B - Fault diagnosis and power restoration method, device and equipment for regional power grid - Google Patents
Fault diagnosis and power restoration method, device and equipment for regional power grid Download PDFInfo
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Abstract
The invention relates to a fault diagnosis and power restoration method, device and equipment for a regional power grid, wherein the method comprises the following steps: PAS of the power system simulates at least one first power device to fail, and a first voltage-loss and power-loss device set is obtained; if the regional power grid has a fault of the second power equipment, acquiring section data before and after an accident time point; analyzing the section data to obtain a third power device with a fault; and matching the third power equipment with the first voltage-losing and power-losing equipment set to obtain a second voltage-losing and power-losing equipment set, and carrying out load transfer and/or power restoration on the power equipment of the second voltage-losing and power-losing equipment set. When the power grid fails, the method reduces the processing time by carrying out quick recovery processing on the power grid according to a simulated failure recovery mode, improves the stability and the power supply reliability of power operation, and fully utilizes the power grid resources to realize uninterrupted power supply switching, thereby ensuring that the power grid continues to keep safe, economical and high-quality operation.
Description
Technical Field
The present invention relates to the field of power technologies of power grids, and in particular, to a method, an apparatus, and a device for fault diagnosis and power restoration of a regional power grid.
Background
In recent years, with the increase of power loads, when the conditions of overload of a line or a main transformer of a power grid, equipment faults and the like occur under the condition of high temperature in summer, a dispatcher usually makes a decision manually, the processing time is long, and a processing means usually can only rely on a centralized control dispatcher to conduct the operation of cutting off the main transformer load, so that the labor consumption is high.
The existing method for monitoring and deciding abnormal conditions of equipment in a power grid, such as equipment overload and equipment failure, lacks effective monitoring and deciding tools, can only manually find related solutions in a manual query mode, generally requires a dispatcher to manually judge to give corresponding operation solutions according to the analysis of matters, and has the disadvantages of long processing time, low efficiency, low emergency response capability and incapability of quickly recovering the power grid.
Disclosure of Invention
The embodiment of the invention provides a fault diagnosis and power restoration method, device and equipment for a regional power grid, which are used for solving the technical problems that after equipment in the existing power grid fails, the fault is manually processed, the processing time is long, the efficiency is low, the emergency response capability is low, and the power grid cannot be quickly restored.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
a fault diagnosis and power restoration method for a regional power grid comprises the following steps:
Laying out a regional power grid topological network in PAS of the power system, simulating that first power equipment of at least one regional power grid fails in PAS of the power system through the regional power grid topological network, and obtaining a first voltage loss and power loss equipment set corresponding to the failed first power equipment;
if the second power equipment in the regional power grid fails, acquiring section data before and after an accident time point corresponding to the failed second power equipment;
analyzing the section data to obtain a third power device with a fault;
and matching the third power equipment with the first voltage-losing and power-losing equipment set to obtain a second voltage-losing and power-losing equipment set, and carrying out load power conversion and/or power restoration on the power equipment of the second voltage-losing and power-losing equipment set.
Preferably, before acquiring section data before and after a point of time corresponding to a failed second power device, the fault diagnosis and power restoration method for the regional power grid includes:
Periodically monitoring a regional power grid through a power system and acquiring the current power equipment state of the monitored regional power grid;
And in the set time, analyzing and judging whether a switch tripping operation and an accident total signal exist or not for the current power equipment state, if so, generating a fault of the second power equipment in the area voltage, and creating an accident time point.
Preferably, the fault diagnosis and power restoration method of the regional power grid includes: and in the set time of 1s, analyzing and judging whether a total signal of switch tripping and accident exists in the current power equipment state, if so, generating a fault of the second power equipment in the area voltage, and creating an accident time point.
Preferably, analyzing the section data to obtain a faulty third power device includes: and if the section data corresponding to the second power equipment before the accident time point is that the voltage output exists in the second power equipment, and the section data corresponding to the second power equipment after the accident time point is that the voltage output does not exist in the second power equipment, the second power equipment breaks down and is marked as third power equipment.
Preferably, load transfer and power restoration of the power devices of the second set of voltage loss and power loss devices includes: and disconnecting the second power equipment connected with the third power equipment, recovering power supply to the power equipment of the second voltage-losing power equipment set, and/or carrying out load transfer on a power-losing load connected with the power equipment in the second voltage-losing power equipment set through a transfer power supply path.
Preferably, after obtaining the failed third power device, before performing load transfer on the power devices of the second voltage-loss power-loss device set, the fault diagnosis and power restoration method for the regional power grid includes: n-1 fault scanning is adopted for the regional power grid, and overload power equipment corresponding to the power loss load is obtained; and determining a transfer power supply path corresponding to the power loss load in the regional power grid by avoiding the overload power equipment.
Preferably, after obtaining the failed third electric power device, the fault diagnosis and power restoration method of the regional power grid includes: and acquiring section data corresponding to the third power equipment, recording the section data as fault section data, generating alarm information through the fault section data in a power system, and transmitting the alarm information to a master station of a regional power grid.
Preferably, the fault diagnosis and power restoration method of the regional power grid includes: and storing and classifying the alarm information through a main station of the regional power grid to obtain an alarm definition table.
The invention also provides a fault diagnosis and power restoration device of the regional power grid, which comprises the following components: the system comprises a fault simulation module, a data acquisition module, a data analysis module and a power restoration module;
The fault simulation module is used for laying out a regional power grid topological network in PAS of the power system, simulating that first power equipment of at least one regional power grid fails in the PAS of the power system through the regional power grid topological network, and obtaining a first voltage-loss and power-loss equipment set corresponding to the failed first power equipment;
the data acquisition module is used for acquiring section data before and after an accident time point corresponding to the failed second power equipment if the second power equipment fails in the regional power grid;
the data analysis module is used for analyzing the section data to obtain a third power device with a fault;
And the power restoration module is used for matching the third power equipment with the first voltage-losing and power-losing equipment set to obtain a second voltage-losing and power-losing equipment set, and carrying out load power conversion and/or power restoration on the power equipment of the second voltage-losing and power-losing equipment set.
The invention also provides fault diagnosis and recovery power supply equipment of the regional power grid, which comprises a processor and a memory;
the memory is used for storing program codes and transmitting the program codes to the processor;
And the processor is used for executing the fault diagnosis and power restoration method of the regional power grid according to the instructions in the program codes.
From the above technical solutions, the embodiment of the present invention has the following advantages: the fault diagnosis and power restoration method, device and equipment for the regional power grid comprise the following steps: laying out a regional power grid topological network in PAS of the power system, simulating that first power equipment of at least one regional power grid fails in PAS of the power system through the regional power grid topological network, and obtaining a first voltage loss and power loss equipment set corresponding to the failed first power equipment; if the second power equipment in the regional power grid fails, acquiring section data before and after an accident time point corresponding to the failed second power equipment; analyzing the section data to obtain a third power device with a fault; and matching the third power equipment with the first voltage-losing and power-losing equipment set to obtain a second voltage-losing and power-losing equipment set, and carrying out load transfer and/or power restoration on the power equipment of the second voltage-losing and power-losing equipment set. When the power grid fails, the fault diagnosis and power restoration method for the regional power grid quickly restores the power grid according to the simulated fault restoration mode, so that the accident handling decision time is reduced, the power running stability is improved, the power supply reliability of the power grid is improved, and the emergency handling capacity is improved; the power grid resource is fully utilized to realize uninterrupted power supply to transfer power, so that the power grid continues to keep safe, economical and high-quality operation, the power supply reliability is guaranteed, the customer power consumption satisfaction is improved, and the technical problems that after equipment in the existing power grid fails, the equipment is manually processed, the processing time is long, the efficiency is low, the emergency response capability is low, and the power grid cannot be quickly recovered are solved.
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In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a flowchart of steps of a fault diagnosis and power restoration method for a regional power grid according to an embodiment of the present invention;
fig. 2 is a frame diagram of a fault diagnosis and power restoration device for a regional power grid according to an embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the application provides a fault diagnosis and power restoration method, device and equipment for a regional power grid, which are used for solving the technical problems that after equipment in the existing power grid fails, the fault is manually processed, the processing time is long, the efficiency is low, the emergency response capability is low, and the power grid cannot be quickly restored.
Embodiment one:
fig. 1 is a flowchart of steps of a fault diagnosis and power restoration method for a regional power grid according to an embodiment of the present invention.
As shown in fig. 1, the embodiment of the invention provides a fault diagnosis and power restoration method for a regional power grid, which comprises the following steps:
S1, laying out a regional power grid topological network in PAS of the power system, simulating that first power equipment of at least one regional power grid fails in PAS of the power system through the regional power grid topological network, and obtaining a first voltage-loss and power-loss equipment set corresponding to the failed first power equipment.
It should be noted that, mainly, the topology network of the regional power grid is firstly set in the PAS of the existing power system, after the topology network relationship of the regional power grid is laid out, the PAS of the power system simulates that at least one power device of the regional power grid fails, and then the power device with voltage and electricity loss is obtained from the PAS of the power system. Wherein the power equipment includes: 220kV bus, 220kV main transformer, 110kV bus, 110kV line, 110kV main transformer, 10kV bus, breaker, switch, transformer and other power equipment in 220kV station
In the step S1 of the fault diagnosis and power restoration method for the regional power grid, in the embodiment of the present invention, a fault of a power device may be simulated in a PAS of a power system, a fault of a single power device may be simulated, a fault of a plurality of power devices may also be simulated, the power system determines a set of power devices that are caused by the power device that has failed according to the power device that has failed, and power restoration is performed on the power devices.
The fault diagnosis and power restoration method of the regional power grid can simulate the voltage-losing and power-losing equipment set caused by the faults of the power equipment of various types in advance, and the faulty power equipment and the corresponding voltage-losing and power-losing equipment set are stored in an associated mode. In the actual operation process, if the same fault power equipment is detected in the steps S2 to S4, the power-losing and voltage-losing equipment to be recovered can be rapidly determined, so that the processing time is shortened, the accident processing decision time is shortened, and the efficiency is improved.
S2, if the second power equipment in the regional power grid fails, acquiring section data before and after an accident time point corresponding to the failed second power equipment.
In step S2, it is mainly detected that the power equipment in the regional power grid fails, and the power equipment in the actual regional power grid is recorded as second power equipment, and section data before and after an accident time point corresponding to the failed second power equipment is obtained according to the failure of the second power equipment in the regional power grid.
S3, analyzing the section data to obtain the failed third power equipment.
The section data before and after the power equipment with the fault is obtained in the step S2, and the third power equipment with the fault is determined by analysis. The section data includes electrical parameters such as voltage, current, power, etc. For example, the section data before the power equipment fails is normal (data such as voltage, current, power and the like exist), and the section data after the power equipment fails is abnormal (data such as voltage, current, power and the like do not exist or data such as voltage, current, power and the like exist and cannot drive the power equipment to normally operate).
S4, matching the third power equipment with the first voltage-losing and power-losing equipment set to obtain a second voltage-losing and power-losing equipment set, and carrying out load transfer and/or power restoration on the power equipment of the second voltage-losing and power-losing equipment set.
In the step S4, the third power device that has failed and obtained in the step S3 is compared with the first set of voltage-loss power-loss devices corresponding to the first power device that has failed and obtained in the step S1, whether the first set of voltage-loss power-loss devices has the same power device that has failed as the third power device is compared, and if the third power device that has failed as the third power device is present, all the voltage-loss power-loss devices corresponding to the power device are directly obtained from the first set of voltage-loss power-loss devices as the second set of voltage-loss power-loss devices; and if the power equipment which is the same as the third power equipment fails, acquiring all the power equipment which corresponds to the third power equipment and is subjected to voltage loss and power loss from the regional power grid to form a second voltage loss and power loss equipment set.
In the embodiment of the invention, the fault diagnosis and power restoration method of the regional power grid obtains fault data before and after the fault time point of the fault from the power system by knowing that the second power equipment of the regional power grid has the fault; and then determining the power equipment with faults according to the electrification condition of the power equipment before and after the data fracture of the power system and whether the voltage change exists, matching the power equipment with faults with the simulated power equipment with faults to obtain a corresponding second voltage-loss and power-loss equipment set, and carrying out load switching and/or power restoration on the second voltage-loss and power-loss equipment set, thereby realizing intelligent analysis and diagnosis of power grid faults and restoring power supply.
The invention provides a fault diagnosis and power restoration method for a regional power grid, which comprises the following steps: laying out a regional power grid topological network in PAS of the power system, simulating that first power equipment of at least one regional power grid fails in PAS of the power system through the regional power grid topological network, and obtaining a first voltage loss and power loss equipment set corresponding to the failed first power equipment; if the second power equipment in the regional power grid fails, acquiring section data before and after an accident time point corresponding to the failed second power equipment; analyzing the section data to obtain a third power device with a fault; and matching the third power equipment with the first voltage-losing and power-losing equipment set to obtain a second voltage-losing and power-losing equipment set, and carrying out load transfer and/or power restoration on the power equipment of the second voltage-losing and power-losing equipment set. When the power grid fails, the fault diagnosis and power restoration method for the regional power grid quickly restores the power grid according to the simulated fault restoration mode, so that the accident handling decision time is reduced, the power running stability is improved, the power supply reliability of the power grid is improved, and the emergency handling capacity is improved; the power grid resource is fully utilized to realize uninterrupted power supply to transfer power, so that the power grid continues to keep safe, economical and high-quality operation, the power supply reliability is guaranteed, the customer power consumption satisfaction is improved, and the technical problems that after equipment in the existing power grid fails, the equipment is manually processed, the processing time is long, the efficiency is low, the emergency response capability is low, and the power grid cannot be quickly recovered are solved.
The fault diagnosis and power restoration method for the regional power grid can accurately detect the running state of the current regional power grid, can accurately position the abnormality and accident situation of the regional power grid, reduces the accident handling decision time and improves the stability and reliability of power running.
In one embodiment of the present invention, before acquiring section data before and after a point of time corresponding to a failed second power device, the fault diagnosis and power restoration method for a regional power grid includes:
Periodically monitoring a regional power grid through a power system and acquiring the current power equipment state of the monitored regional power grid;
and in the set time, analyzing and judging whether a total signal of switch tripping and accident exists in the current power equipment state, if so, generating an accident time point when the second power equipment fails in the area voltage.
It should be noted that the total accident signal refers to all cabinet fault signals connected in parallel in the power grid. The current power device state includes the active power, reactive power, bus voltage, switching state, etc. of the power device. In the embodiment, whether the total signal of the switch tripping and the station accident occurs is periodically detected; when the substation simultaneously generates a switch tripping operation signal and an optical character plate action signal of an accident total signal in a preset time, the accident is considered to occur; creating an accident time point and storing section data of the power system before and after the accident time point. The set time may be 1s, or may be set according to the requirement, and is not unique.
In one embodiment of the present invention, analyzing the section data to obtain a failed third power device includes: and if the section data corresponding to the second power equipment before the accident time point is that the voltage output exists in the second power equipment, and the section data corresponding to the second power equipment after the accident time point is that the voltage output does not exist in the second power equipment, the second power equipment breaks down and is marked as third power equipment.
The power equipment that has failed is determined by analyzing the electrification of the power equipment before and after the fracture and whether there is a change in voltage. For example: according to the current state of the regional power grid, including the active power, reactive power, bus voltage, switching state and the like of the power equipment (circuit, main transformer, bus and the like), whether a switch tripping operation and a total station accident signal occur or not are detected periodically, when a certain transformer station simultaneously generates a switch tripping operation and a total accident signal optical character board action signal within 1 second, an accident occurs to the power system, an accident time point is established, section data of the power system before and after the accident time point are stored, and the third power equipment with the fault is determined by analyzing the electrification condition of the second power equipment before and after the section and the change of whether the voltage exists or not.
In one embodiment of the present invention, load transferring and power restoration to the power devices of the second set of voltage loss and power loss devices includes: and disconnecting the second power equipment connected with the third power equipment, recovering power supply to the power equipment of the second voltage-losing power equipment set, and/or carrying out load transfer on a power-losing load connected with the power equipment in the second voltage-losing power equipment set through transferring a power supply path.
The second power equipment communicated with the third power equipment with the fault is disconnected, the third power equipment with the fault is isolated, and the power equipment in the second voltage-losing and power-losing equipment set is recovered; the load transfer is performed by transferring the power supply path for each load that is lost. Specifically, the electric equipment communicated with the third electric equipment is disconnected with the third electric equipment, so that isolation of a fault object is realized; for each power-losing load, carrying out load transfer through a transfer power supply path; and the power equipment in the second voltage-loss power-loss equipment set is recovered to supply power, a transfer power supply path conforming to actual operation is provided according to an actual operation mode, and the recovery power supply is supported to be carried out across voltage levels.
In one embodiment of the present invention, after obtaining a third power device with a fault, before performing load transfer on a power device of a second set of voltage-loss and power-loss devices, the fault diagnosis and power restoration method for the regional power grid includes: n-1 fault scanning is adopted for the regional power grid, and overload power equipment corresponding to the power loss load is obtained; a transition power supply path corresponding to the loss of power load is determined in the regional power grid by avoiding overload power devices.
It should be noted that, aiming at the current running condition of the regional power grid, N-1 scanning faults are performed in real time, then N-1 on-line analysis is performed to obtain overload power equipment corresponding to the power loss load and the corresponding overload capacity, and data is provided for the designated transfer power supply path, so that the load is redistributed, and the power grid is ensured to be transferred to another safe and stable running section. If the transfer power supply path cannot be determined in the power system, the load cut-off can be sequentially carried out on the power loss load according to the load cut-off electricity limiting sequence table given by a user, so that the overload condition of the power equipment is eliminated.
In one embodiment of the present invention, after obtaining the third power device that has failed, the method for diagnosing and recovering power from the fault of the regional power grid includes: and acquiring section data corresponding to the third power equipment, recording the section data as fault section data, generating alarm information through the fault section data in the power system, and transmitting the alarm information to a master station of the regional power grid. The fault diagnosis and power restoration method of the regional power grid comprises the following steps: and storing and classifying the alarm information through a main station of the regional power grid to obtain an alarm definition table.
The alarm information includes alarm level, alarm time, full path name of the power equipment, alarm content, etc. The alert level includes accident, anomaly, out of limit, shift, notification level, etc. And classifying the alarm information according to the five direct-pass alarm signal grades, establishing a direct-pass alarm definition table and storing the alarm information into a database of the power system. Specifically, for example: the standardized processing of the alarm signal of the transformer substation is completed by a station monitoring host of the transformer substation, and the alarm signal is directly transmitted to a front-end server of a ground dispatching master station through a power dispatching data network in a text format by a remote industrial personal computer of a power system. The five direct-current warning signal levels comprise an accident signal, an abnormal signal, an out-of-limit signal, a deflection signal and a notification signal. The contents of which are respectively:
The accident signals refer to power grid faults, power equipment fault signals and the like, and include other signals such as tripping of a switch, tripping of non-manual operation, tripping and closing of an action outlet of a protection device, signals of action of a self-installation device, and remote operation interruption affecting the safe operation of a total station.
The abnormal signal refers to various alarm signals reflecting the faults or abnormal conditions of the primary power equipment and the secondary power equipment, and influences the remote control operation of the power equipment, thereby directly threatening the safety of the power grid and the operation of the power equipment. The abnormal signals comprise various power equipment abnormal signals, action signals of protection and automatic devices, AVC locking signals, device communication interrupt signals and the like.
The out-of-limit signal refers to information that exceeds the upper and lower alarm limits to reflect an important telemetry amount. Important telemetry amounts include electrical amounts of active power, reactive power, current, voltage, etc. of the electrical equipment.
The deflection signal refers to information for changing the normal state (opening and closing) of the switch equipment.
The notification signal refers to general information for reflecting the operation condition and state monitoring of the power equipment of the power grid. The information of the power equipment mainly comprises an isolating switch, a grounding disconnecting link position signal, a main transformer running gear and associated signals (such as a remote/local measuring and controlling device) when the power equipment normally operates.
In the embodiment of the invention, the alarm content refers to the specific content of the alarm, and is described by adopting a character string, and the length of the character string is not more than 128 characters.
In the embodiment of the invention, the ground dispatching master station deploys a direct-transmission warning signal processing service program, completes the classification processing of five direct-transmission warning signal levels such as accidents, abnormality, out-of-limit, deflection and notification, establishes a direct-transmission warning definition table and stores warning information into a database of a power line system. For example: the substation end uploads the alarm information to the ground dispatching master station end through a DL476 protocol, and the ground dispatching master station end captures, transmits, classifies and analyzes the alarm of the substation through acquisition of the alarm information and is responsible for pushing the direct-transmission alarm information to the middle dispatching master station end through a safety III area so as to realize an intelligent alarm application system with full coverage of province, ground and stations.
Embodiment two:
fig. 2 is a frame diagram of a fault diagnosis and power restoration device for a regional power grid according to an embodiment of the present invention.
As shown in fig. 2, an embodiment of the present invention further provides a fault diagnosis and power restoration device for a regional power grid, including: the system comprises a fault simulation module 10, a data acquisition module 20, a data analysis module 30 and a power restoration module 40;
The fault simulation module 10 is configured to layout a regional power grid topology network in a PAS of the power system, simulate, by the regional power grid topology network, that a first power device of at least one regional power grid fails in the PAS of the power system, and obtain a first set of voltage-loss and power-loss devices corresponding to the failed first power device;
The data acquisition module 20 is configured to acquire section data before and after an accident time point corresponding to the failed second power device if the second power device fails in the regional power grid;
the data analysis module 30 is configured to analyze the section data to obtain a third power device that fails;
and the power restoration module 40 is configured to match the third power device with the first set of voltage-loss and power-loss devices, obtain a second set of voltage-loss and power-loss devices, and perform load switching and/or power restoration on the power devices of the second set of voltage-loss and power-loss devices.
It should be noted that, the module in the second device corresponds to a step in the method in the first embodiment, and the content of the steps in the fault diagnosis and power restoration method for the regional power grid in the first embodiment is described in detail in the first embodiment, and the content of the module in the second embodiment is not described in detail in the second embodiment.
Embodiment III:
The embodiment of the invention provides fault diagnosis and power restoration equipment for a regional power grid, which comprises a processor and a memory;
a memory for storing program code and transmitting the program code to the processor;
and the processor is used for executing the fault diagnosis and power restoration method of the regional power grid according to the instructions in the program codes.
It should be noted that the processor is configured to execute the steps in the above-described embodiment of the fault diagnosis and power restoration method for a regional power grid according to the instructions in the program code. Or the processor, when executing the computer program, performs the functions of the modules/units in the system/device embodiments described above.
For example, a computer program may be split into one or more modules/units, which are stored in a memory and executed by a processor to perform the present application. One or more of the modules/units may be a series of computer program instruction segments capable of performing specific functions for describing the execution of the computer program in the terminal device.
The terminal device may be a computing device such as a desktop computer, a notebook computer, a palm computer, a cloud server, etc. The terminal device may include, but is not limited to, a processor, a memory. It will be appreciated by those skilled in the art that the terminal device is not limited and may include more or less components than those illustrated, or may be combined with certain components, or different components, e.g., the terminal device may also include input and output devices, network access devices, buses, etc.
The Processor may be a central processing unit (Central Processing Unit, CPU), other general purpose Processor, digital signal Processor (DIGITAL SIGNAL Processor, DSP), application SPECIFIC INTEGRATED Circuit (ASIC), off-the-shelf Programmable gate array (Field-Programmable GATE ARRAY, FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory may be an internal storage unit of the terminal device, such as a hard disk or a memory of the terminal device. The memory may also be an external storage device of the terminal device, such as a plug-in hard disk provided on the terminal device, a smart memory card (SMART MEDIA CARD, SMC), a Secure Digital (SD) card, a flash memory card (FLASH CARD), or the like. Further, the memory may also include both an internal storage unit of the terminal device and an external storage device. The memory is used for storing computer programs and other programs and data required by the terminal device. The memory may also be used to temporarily store data that has been output or is to be output.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The fault diagnosis and power restoration method for the regional power grid is characterized by comprising the following steps of:
Laying out a regional power grid topological network in PAS of the power system, simulating that first power equipment of at least one regional power grid fails in PAS of the power system through the regional power grid topological network, and obtaining a first voltage loss and power loss equipment set corresponding to the failed first power equipment;
if the second power equipment in the regional power grid fails, acquiring section data before and after an accident time point corresponding to the failed second power equipment;
analyzing the section data to obtain a third power device with a fault;
Matching the third power equipment with the first voltage-losing and power-losing equipment set to obtain a second voltage-losing and power-losing equipment set, and carrying out load power conversion and/or power restoration on the power equipment of the second voltage-losing and power-losing equipment set;
before acquiring section data before and after a moment corresponding to a failed second power device, the fault diagnosis and power restoration method for the regional power grid comprises the following steps:
Periodically monitoring a regional power grid through a power system and acquiring the current power equipment state of the monitored regional power grid;
In the set time, analyzing and judging whether a switch tripping and accident total signal exists in the current power equipment state, if yes, a second power equipment is in fault in the area voltage, and creating an accident time point;
Analyzing the section data to obtain a third power device with a fault, wherein the third power device comprises: and if the section data corresponding to the second power equipment before the accident time point is that the voltage output exists in the second power equipment, and the section data corresponding to the second power equipment after the accident time point is that the voltage output does not exist in the second power equipment, the second power equipment breaks down and is marked as third power equipment.
2. The fault diagnosis and restoration power supply method for a regional power grid according to claim 1, wherein the fault diagnosis and restoration power supply method for a regional power grid comprises: and in the set time of 1s, analyzing and judging whether a total signal of switch tripping and accident exists in the current power equipment state, if so, generating a fault of the second power equipment in the area voltage, and creating an accident time point.
3. The fault diagnosis and power restoration method for a regional power grid according to claim 1, wherein performing load transfer and power restoration on the power devices of the second set of voltage loss and power loss devices comprises: and disconnecting the second power equipment connected with the third power equipment, recovering power supply to the power equipment of the second voltage-losing power equipment set, and/or carrying out load transfer on a power-losing load connected with the power equipment in the second voltage-losing power equipment set through a transfer power supply path.
4. The method for diagnosing and recovering power from a power grid fault according to claim 3, wherein after obtaining the third power device having a fault, before performing load transfer on the power devices of the second set of voltage loss and power loss devices, the method for diagnosing and recovering power from a power grid fault comprises: n-1 fault scanning is adopted for the regional power grid, and overload power equipment corresponding to the power loss load is obtained; and determining a transfer power supply path corresponding to the power loss load in the regional power grid by avoiding the overload power equipment.
5. The fault diagnosis and restoration power supply method for a regional power grid according to claim 1, wherein after obtaining the failed third power device, the fault diagnosis and restoration power supply method for a regional power grid comprises: and acquiring section data corresponding to the third power equipment, recording the section data as fault section data, generating alarm information through the fault section data in a power system, and transmitting the alarm information to a master station of a regional power grid.
6. The fault diagnosis and restoration power supply method for a regional power grid according to claim 5, comprising: and storing and classifying the alarm information through a main station of the regional power grid to obtain an alarm definition table.
7. The fault diagnosis and power restoration device for the regional power grid is characterized by comprising a fault simulation module, a data acquisition module, a data analysis module and a power restoration module;
The fault simulation module is used for laying out a regional power grid topological network in PAS of the power system, simulating that first power equipment of at least one regional power grid fails in the PAS of the power system through the regional power grid topological network, and obtaining a first voltage-loss and power-loss equipment set corresponding to the failed first power equipment;
the data acquisition module is used for acquiring section data before and after an accident time point corresponding to the failed second power equipment if the second power equipment fails in the regional power grid;
the data analysis module is used for analyzing the section data to obtain a third power device with a fault;
The power restoration module is used for matching the third power equipment with the first voltage-losing and power-losing equipment set to obtain a second voltage-losing and power-losing equipment set, and carrying out load power conversion and/or power restoration on the power equipment of the second voltage-losing and power-losing equipment set;
Before acquiring section data before and after a moment corresponding to a failed second power device, the fault diagnosis and power restoration device for the regional power grid comprises: periodically monitoring a regional power grid through a power system and acquiring the current power equipment state of the monitored regional power grid; in the set time, analyzing and judging whether a switch tripping and accident total signal exists in the current power equipment state, if yes, a second power equipment is in fault in the area voltage, and creating an accident time point;
The data analysis module is further used for outputting voltage for the second power equipment according to the section data corresponding to the second power equipment before the accident time point, and the section data corresponding to the second power equipment after the accident time point is that the voltage output does not exist for the second power equipment, so that the second power equipment fails and is recorded as third power equipment.
8. The fault diagnosis and power restoration equipment for the regional power grid is characterized by comprising a processor and a memory;
the memory is used for storing program codes and transmitting the program codes to the processor;
The processor is configured to execute the fault diagnosis and power restoration method of the regional power grid according to the instructions in the program code.
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| CN103227450A (en) * | 2013-04-26 | 2013-07-31 | 国家电网公司 | On-line failure recovery method and system |
| WO2017166735A1 (en) * | 2016-03-31 | 2017-10-05 | 国电南瑞科技股份有限公司 | Power-grid self-healing system and self-healing logic thereof in 110kv chain power-supply mode |
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