CN112421614A - Power distribution station self-healing control system and method based on local communication and topology identification - Google Patents
Power distribution station self-healing control system and method based on local communication and topology identification Download PDFInfo
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- CN112421614A CN112421614A CN202011221955.1A CN202011221955A CN112421614A CN 112421614 A CN112421614 A CN 112421614A CN 202011221955 A CN202011221955 A CN 202011221955A CN 112421614 A CN112421614 A CN 112421614A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00004—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the power network being locally controlled
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/128—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment involving the use of Internet protocol
Abstract
The invention provides a distribution station self-healing control system and a distribution station self-healing control method based on local communication and topology identification, wherein the system comprises a cloud-pipe-edge-end side subsystem, and the cloud-pipe-edge-end side subsystem comprises the following components: the 'end' side subsystem comprises an intelligent circuit breaker and is used for protecting tripping action, collecting faults and uploading information; the 'side subsystem comprises an intelligent fusion terminal and is used for receiving information reported by the' side subsystem, analyzing the position and the nature of a fault point on the basis of identifying a topological structure in a power distribution station area, recovering the power supply of a non-fault area and reporting a self-healing processing result to the 'cloud' side subsystem; the "pipe" side subsystem comprises a local communication network between the "end" side subsystem and the "side subsystem; and the cloud side subsystem collects self-healing processing results reported by the side subsystems of each power distribution station area, and performs cross-station self-healing coordination control. The invention can position the fault point and judge the fault type, realize the fault point isolation and automatically recover the power supply to the non-fault area.
Description
Technical Field
The invention relates to the technical field of power system automation and power internet of things, in particular to a power distribution station self-healing control system and method based on local communication and topology identification.
Background
The low-voltage 400V power distribution area directly supplies power to thousands of households, is wide in points, has a bottleneck in equipment management and information sharing, has no mature and reliable fault self-healing recovery method once a fault occurs in the power distribution area, and can only realize fault point judgment and fault type discrimination by means of manual troubleshooting, so that the time required for troubleshooting and eliminating is long, and the requirements of power supply reliability and pursuit of high-quality life by the masses are difficult to meet.
Fig. 1 shows a conventional distribution substation fault processing flow. After the user has power failure, calling the service center through the 95598 telephone to perform power failure feedback; the service center judges whether the power failure is planned power failure according to a power failure plan prearranged by a power grid company, if so, the service center indicates that the current power failure is not caused by the failure of the distribution substation area, and explains the reason of the power failure to the user; if not, the current power failure is indicated to be possibly caused by the faults of the power distribution station area, the operation and maintenance department is immediately informed, goes to carry out on-site troubleshooting, and power supply is recovered.
The fault processing flow shown in fig. 1 above can find that the existing distribution substation fault processing flow has various disadvantages. The most important disadvantage is that the distribution substation area can only know that the power failure phenomenon occurs, but cannot clearly judge whether the power failure is caused by the internal failure of the distribution substation area, and further cannot realize self-healing recovery functions such as fault point and fault property research and judgment, automatic power recovery in a non-fault area and the like under the condition that the internal failure of the distribution substation area occurs. The above disadvantages are mainly due to: (1) the electric meter acquisition equipment contained in the power distribution station area does not have a fault monitoring function, and can only monitor whether a line is electrified or not and cannot realize the fault detection function even if a plurality of tail end sensing terminals are additionally installed at the current stage; (2) although the circuit breaker equipment contained in the subordinate of the power distribution station area can detect faults and trip, most of the circuit breaker equipment cannot report action information to the upper level; even if action information can be reported to an upper-level system, due to the lack of a power distribution area fault self-healing judgment system, a fault point and a fault type cannot be comprehensively judged, and subsequent automatic recovery control of a non-fault area cannot be realized.
Disclosure of Invention
The invention provides a distribution station self-healing control system and method based on local communication and topology identification, which are used for solving at least one of the technical problems in the prior art.
The invention provides a self-healing control system of a power distribution station area based on local communication and topology identification, which is realized by adopting the following technical scheme.
Distribution station district self-healing control system based on local communication and topology discernment includes "cloud-pipe-limit-end" side subsystem, wherein:
the 'end' side subsystem comprises an intelligent circuit breaker serving as primary and secondary fusion intelligent terminal equipment and is used for protecting action tripping, fault acquisition and information uploading;
the ' side subsystem comprises an intelligent fusion terminal and is used for receiving information reported by the ' end ' side subsystem, analyzing the position and fault property of a fault point on the basis of identifying a topological structure in a power distribution station area, recovering power supply of a non-fault area and reporting a self-healing processing result to the ' cloud ' side subsystem;
the "pipe" side subsystem comprises a local communication network between the "end" side subsystem and the "side subsystem;
the cloud side subsystem comprises a power distribution main station area Internet of things platform and is used for collecting self-healing processing results reported by the side subsystem of each power distribution area and performing cross-area self-healing coordination control.
Preferably, the information sent by the terminal side subsystem comprises at least one of tripping of switch protection action of the intelligent circuit breaker, tripping of three-phase voltage loss of the primary switch and detection of three-phase voltage loss by the non-primary switch.
Preferably, in any of the above schemes, the "side subsystem is further configured to check the collected fault information reported by the" end "side subsystem on the basis of topology identification of the distribution substation, and issue a command to the" end "side subsystem to lock the upstream first-stage circuit breaker at the fault point to switch on after the check is successful.
Preferably, in any of the above schemes, the "side subsystem is further configured to check the collected fault information reported by the" end "side subsystem based on the topology identification of the power distribution grid, and after the check is successful, send a remote control command to the" end "side subsystem, recover power supply of a non-fault area, and report a self-healing processing result to the" cloud "side subsystem.
Preferably, in any of the above schemes, the "side subsystem acquires data of the" end "side subsystem in a time period as a sample, and identifies the internal topological connection relationship of the distribution substation area by adopting a lightweight artificial intelligence algorithm.
Preferably, in any of the above schemes, the local communication network supports that the operation and smooth communication of the equipment can be continuously maintained for no less than 120s by the ' end ' side subsystem and the ' side subsystem under the condition of power failure, and the self-healing function is ensured.
Preferably, in any of the above schemes, the "pipe" side subsystem further comprises a remote communication network between the "edge" side subsystem and the "cloud" side subsystem.
Preferably, in any of the above schemes, the cloud-side subsystem is further used for visually displaying the operating and self-healing working condition states of the managed distribution area.
The second aspect of the invention provides a self-healing control method for a power distribution station area based on local communication and topology identification, which is implemented by adopting the following technical scheme.
A self-healing control method of a power distribution area based on local communication and topology identification is used for the self-healing control system of any scheme, and comprises a cloud-pipe-edge-end side control process, wherein:
the end side control process is used for realizing the tripping of the end side subsystem protection action, the acquisition of faults and the uploading of information;
the 'side control process is used for enabling the' side subsystem to receive information reported by the 'end' side subsystem, analyzing the position and fault property of a fault point on the basis of identifying a topological structure in a power distribution station area, recovering power supply of a non-fault area, and reporting a self-healing processing result to the 'cloud' side subsystem;
the control flow on the ' pipe ' side is used for realizing the function of local communication between the ' end ' side subsystem and the ' side subsystem;
the cloud side control process is used for collecting self-healing processing results reported by side subsystems of each distribution substation area and performing cross-substation self-healing coordination control.
Preferably, the "side control process is further configured to check the collected fault information reported by the" end "side subsystem, and issue a command to the" end "side subsystem to close the upper-level circuit breaker at the fault point after the check is successful.
By adopting the power distribution area self-healing control system and method based on local communication and topology identification, disclosed by the invention, under the condition that a fault occurs in the power distribution area, fault point positioning and fault type judgment can be carried out, fault point isolation is realized, power supply is automatically recovered to a non-fault area, and the self-healing recovery function of the non-fault area of the power distribution area is realized. The fault location judgment of the distribution area can be realized within 60 seconds, and the self-healing recovery of the non-fault area can be realized within 100 seconds.
Compared with the prior power distribution station fault processing technology, the technical scheme of the application has the following beneficial effects:
1. based on a self-healing control mechanism of a 'cloud-pipe-edge-end' distribution station area, the fault processing efficiency is improved.
Based on comprehensive collection and comprehensive analysis of the state of equipment in the distribution transformer area, the topological relation of the low-voltage transformer area is automatically sensed, on the basis of fault information collected by the intelligent circuit breaker, the research and judgment positioning of faults and the self-healing recovery control of a non-fault area are realized through the cooperative calculation of the fusion terminal and the internet of things master station, the traditional fault processing mode adopting manual intervention is changed, and the accuracy and the timeliness of troubleshooting are greatly improved.
2. The low-voltage transformer area fine management is deepened, the fault first-aid repair efficiency is improved, and the power supply reliability is improved.
By effective deployment of self-healing systems such as automatic topology identification, fault positioning, power failure to the home, non-fault area recovery control mechanism and the like, normal construction, maintenance and rush-repair work efficiency of a power grid is improved, fault chances and fault power failure time are reduced, fault hidden dangers are timely discovered and treated, equipment operation reliability is improved, user power failure time is reduced, and fine management level of a power distribution station area is improved.
3. The intelligent circuit breaker device enables the traditional circuit breaker device and improves the intelligent application level.
A self-healing control algorithm is embedded into the breaker equipment, so that the breaker equipment becomes intelligent terminal equipment with primary and secondary integration, and a solid foundation is laid for the deep application development of the power internet of things.
Drawings
Fig. 1 is a schematic diagram of a fault processing flow of a conventional distribution substation.
Fig. 2 is a schematic structural diagram of a power distribution station self-healing control system based on local communication and topology identification according to a preferred embodiment of the present invention.
Fig. 3 is a schematic diagram of a field deployment structure of the self-healing control system of the power distribution station area based on local communication and topology identification according to the embodiment of the invention shown in fig. 2.
Fig. 4 is a schematic diagram of a "cloud-pipe-edge-end" side control flow deployment architecture according to a preferred embodiment of the power distribution station self-healing control method based on local communication and topology identification in the present invention.
Fig. 5 is a schematic diagram of a control flow at the "end" side of the embodiment of fig. 4 of the power distribution station self-healing control method based on local communication and topology identification according to the present invention.
Fig. 6 is a schematic diagram of an "edge" side control process of the power distribution station self-healing control method based on local communication and topology identification according to the embodiment of the invention shown in fig. 4.
Fig. 7 is a schematic diagram of a "cloud" side control process of the power distribution station self-healing control method based on local communication and topology identification according to the embodiment of the invention shown in fig. 4.
Fig. 8 is a schematic diagram of a simulation environment for verifying effectiveness of the power distribution station self-healing control system and method based on local communication and topology identification according to the present invention.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the following examples.
Example 1
As shown in fig. 2 and 3, the power distribution station self-healing control system based on local communication and topology identification includes a "cloud-pipe-edge-end" side subsystem, in which:
the 'end' side subsystem comprises an intelligent circuit breaker serving as primary and secondary fusion intelligent terminal equipment and is used for protecting action tripping, fault acquisition and information uploading;
the ' side subsystem comprises an intelligent fusion terminal and is used for receiving information reported by the ' end ' side subsystem, analyzing the position and fault property of a fault point on the basis of identifying a topological structure in a power distribution station area, recovering power supply of a non-fault area and reporting a self-healing processing result to the ' cloud ' side subsystem;
the "pipe" side subsystem comprises a local communication network between the "end" side subsystem and the "side subsystem;
the cloud side subsystem comprises a power distribution main station area Internet of things platform and is used for collecting self-healing processing results reported by the side subsystem of each power distribution area and performing cross-area self-healing coordination control.
The intelligent circuit breaker is installed in devices such as a power distribution cabinet/cable distribution box/household meter box incoming line side under a power distribution area, so that information perception of the end side is achieved, and the intelligent circuit breaker is used as terminal equipment for primary and secondary fusion of self-healing control of the power distribution area. Distribution station district intelligent circuit breaker has protect function, and conventional protection includes: the intelligent integrated circuit comprises a quick-break current protection device, an overcurrent short-time delay protection device, an overcurrent long-time delay protection device, an electric leakage protection device, an overvoltage protection device, a low-voltage protection device, a three-phase current unbalance protection device, a three-phase voltage unbalance protection device, a phase loss protection device and the like. The information sent by the terminal side subsystem comprises at least one of tripping of switch protection action of the intelligent circuit breaker, tripping of three-phase voltage loss of the primary switch and detection of three-phase voltage loss by the non-primary switch.
The intelligent fusion terminal of the power distribution area is used as an edge computing terminal, receives protection actions and fault information reported by the intelligent circuit breaker, carries out fault study, judgment and check on the basis of identified topology in the power distribution area, analyzes the position and fault property of a fault point, issues a command to close a superior circuit breaker of the fault point after the study, judgment and check are successful, remotely controls the intelligent circuit breaker of a non-fault area to carry out closing actions, recovers power supply of the non-fault area, realizes self-healing of the non-fault area, and reports a self-healing processing result to a cloud side subsystem, thereby realizing the function of local self-healing control of the power distribution area.
The active data information of distribution side output and user side actual use has possessed network topology structure in the space, and intelligent fusion terminal is through gathering the data that intelligent circuit breaker uploaded in a period as the sample, can discern the inside topological relation of connection of distribution station district through built-in lightweight artificial intelligence algorithm. The period and the time length of intelligent circuit breaker data can be set according to actual conditions to intelligence integration terminal collection, and in this embodiment, collection 200 data sampling points can realize the discernment of the inside topological structure of distribution station district. The artificial intelligence algorithm is a mature algorithm and is applied in many fields, and the identification of the topological structure through the lightweight artificial intelligence algorithm based on the collected data is also disclosed by the prior art, so that the detailed description of the specific process of identifying the topological structure in the power distribution station area is not described in detail in the application.
The 'pipe' side subsystem comprises a local communication network between the 'end' side subsystem and the 'side subsystem, and also comprises a remote communication network between the' side subsystem and the 'cloud' side subsystem. The on-site communication network can meet the requirement of real-time communication between the intelligent circuit breaker and the intelligent integrated terminal, ensures the communication service quality, supports the smoothness of equipment operation and communication which can be maintained for no less than 120 seconds under the condition of power failure, and further ensures the realization of the self-healing function. The local communication network can adopt one or more communication technologies such as a 4G/5G wireless private network, NB-LOT, an optical fiber private network, a wired private network, HPLC (high performance liquid chromatography (broadband power line carrier), a micro-power RF wireless network, an HPLC + RF dual mode and the like, and flexible switching of multiple communication modes is supported so as to ensure the communication rate and the reliability of communication under the condition of power failure. In this embodiment, the local area network employs dual mode communication of HPLC + RF. The remote communication network between the intelligent fusion terminal and the platform area Internet of things platform adopts a public network 4G/5G or a private network so as to meet the communication requirement between the intelligent fusion terminal and the platform area Internet of things platform. And an RS485 bus is further arranged between the intelligent circuit breaker on the inlet side of the household meter box and the user meter for communication connection.
The cloud side subsystem is also used for visually displaying the running and self-healing working condition states of the administered power distribution station area.
Example 2
As shown in fig. 4, the distribution substation self-healing control method based on local communication and topology identification is used for the self-healing control system, and includes a "cloud-pipe-edge-end" side control process, where:
the end side control process is used for realizing the tripping of the end side subsystem protection action, the acquisition of faults and the uploading of information;
the 'side control process is used for enabling the' side subsystem to receive information reported by the 'end' side subsystem, recovering power supply of a non-fault area on the basis of identification of a topological structure in a power distribution station area, and reporting a self-healing processing result to the 'cloud' side subsystem; and the system is also used for checking the collected fault information reported by the end side subsystem, and issuing a command to close the upper-level circuit breaker at the fault point to the end side subsystem after the checking is successful.
The control flow on the ' pipe ' side is used for realizing the function of local communication between the ' end ' side subsystem and the ' side subsystem;
the cloud side control process is used for collecting self-healing processing results reported by side subsystems of each distribution substation area and performing cross-substation self-healing coordination control.
For the identification, name and description of the parameters that may be used in this embodiment, see table 1.
TABLE 1
(1) End side control flow
The intelligent circuit breaker in the distribution station district has the protect function, and conventional protection includes: the method comprises the following steps of quick current interruption protection, overcurrent short time delay protection, overcurrent long time delay protection, leakage protection, overvoltage protection, low voltage protection, three-phase current unbalance protection, three-phase voltage unbalance protection, open-phase protection and the like. The specific flow of the "end" side control is shown in fig. 5.
Initial parameter setting is carried out on each circuit breaker in the power distribution area, and specific parameter identification, parameter names, initial setting values and initial setting value meanings which need to be set are shown in a table 2. Protecting other initial default parameters of the circuit breaker, and setting the parameters through a program;
TABLE 2
After the initial parameter setting of each circuit breaker is completed, in the power supply process of a power distribution station area, each circuit breaker circularly detects voltage and current to see whether a fault occurs, and meanwhile, circularly detects three-phase voltage to judge whether 3-phase voltage loss occurs;
when the intelligent circuit breaker confirms that a fault occurs in the process of detecting voltage and current, setting a parameter KgGzSgZ _ YX of the intelligent circuit breaker to be 1, simultaneously executing tripping of switch protection actions by the intelligent circuit breaker, and reporting action information and fault information of the intelligent circuit breaker to an intelligent fusion terminal through an in-situ communication network;
when the intelligent circuit breaker confirms that a three-phase voltage-loss fault occurs in the process of detecting three-phase voltage, setting a parameter KgDySgZ _ YX of the intelligent circuit breaker to be 1, simultaneously judging whether the intelligent circuit breaker is a primary switch, if the intelligent circuit breaker is the primary switch, executing a voltage-loss tripping action, and reporting action information and fault information of the intelligent circuit breaker to an intelligent fusion terminal through a local communication network; if the intelligent circuit breaker is not the first-level switch, the fault information detected by the intelligent circuit breaker is directly reported to the intelligent fusion terminal through a local communication network.
(2) Side control flow
The intelligent fusion terminal of the power distribution area is an edge computing terminal, receives protection actions and fault information reported by the intelligent circuit breaker, conducts fault study and judgment on the basis of identifying the topology of the power distribution area, analyzes the position and the fault property of a fault point, issues a protection locking command to the circuit breaker at the upper end of the fault point, remotely restores the actions of the circuit breaker in a non-fault area, reports the action information to a cloud master station, and achieves the function of self-healing control on the spot of the power distribution area. The specific flow of the "edge" side control flow is shown in fig. 6.
Firstly, parameter setting is carried out, and the specific parameter identification, parameter name, initial setting value and initial setting value meaning which need to be set are shown in table 3.
TABLE 3
And calling and testing all intelligent circuit breakers FA configuration parameters in the power distribution station area, and if the configuration parameters are tested correctly, checking whether parameters KgGzSgZ _ YX of the intelligent circuit breakers are 1 or KgDySgZ _ YX is 1 in the power distribution station area, and if so, collecting KgGzSgZ _ YX and KgDySgZ _ YX parameter values of all the intelligent circuit breakers in the power distribution station area within a set time T _ Tmax. When the set time T _ Tmax is reached or the collection of the KgGzSgZ _ YX and KgDySgZ _ YX parameter values of all intelligent breakers in the power distribution area is completed within the time T _ Tmax, judging whether the condition A is met: collecting all switch fault reporting information of the transformer area, and checking whether a transformer area topological structure sent by a cloud side subsystem is correct, wherein is TtuFaInvalid _ YX 0? The side subsystem can verify the correctness of the topological structure in the transformer area sent by the cloud side subsystem through an algorithm.
And under the condition that the condition A is not met, setting the value of TtuFaInvalid _ YX to be 1, locking the self-healing control of the power distribution station area, compiling a self-healing judgment and operation process information table, switching action and fault information, and reporting to the platform of the Internet of things of the power distribution main station area.
And under the condition that the condition A is met, judging whether the parameter KgGzSgZ _ YX of at least one intelligent circuit breaker in the power distribution station area takes the value of 1. If yes, indicating that a fault point exists in the distribution station area, judging the position of the fault point, setting the parameter KgCloseValid _ YX of the first-stage circuit breaker at the upstream of the fault point as 1, and closing and locking the first-stage circuit breaker at the upstream of the fault point by YK; YK sets a parameter KgFaultValid _ YX of an upstream first-stage circuit breaker of a fault point to be 1, and sets a flag bit of the fault point; and deriving a self-healing control operation information table. Then according to the self-healing control operation information table, non-fault area recovery power supply is carried out, namely, for other tripped intelligent circuit breakers except the upstream first-level circuit breaker of the fault point: closing according to the sequence operation, setting the parameter KgFaultValid _ YX to be 0, and restoring the parameter to the initial state, namely setting the parameter KgFaultInvalid _ YX to be 0, KgGzSgZ _ YX to be 0, and KgDySgZ _ YX to be 0. And then compiling a self-healing study and judgment and operation process information table, switching action and fault information and reporting to the power distribution main station platform area Internet of things platform. The intelligent integration terminal judges the position of a fault point by combining the fault information reported by the intelligent circuit breaker and the topological structure in the station area, specifically, when a point on a certain line has a fault, all the intelligent circuit breakers on the fault line can report the fault information, and the intelligent circuit breakers on other normal lines cannot report the fault information.
And under the condition that the condition A is met, judging whether the parameter KgGzSgZ _ YX of at least one intelligent circuit breaker in the power distribution station area takes the value of 1. If not, the power distribution station area has no fault, and the voltage loss is caused by the power loss of the upper stage. Then monitoring the electrified state of the pile head on the first-stage circuit breaker in the power distribution station area, if the pile head on the first-stage circuit breaker is electrified, resetting the voltage loss marks of other circuit breakers by YK, then compiling a self-healing study and judgment, an operation process information table, switching action and fault information, and reporting to an Internet of things platform of the power distribution main station area; if the pile head on the first-stage circuit breaker is not charged, the whole distribution station area is power-off, the voltage-loss mark of the first-stage circuit breaker is reserved, YK sets the parameter KgCloseValid _ YX of the first-stage circuit breaker to be 1, after the circuit breaker is powered on again, the voltage-loss mark and the closing locking mark are reset by the main station, the self-healing research and judgment, the operation process information table and the switch action and fault information are compiled, and the platform of the internet of things of the distribution main station area is reported.
The side control process can be realized by embedding and fusing an intelligent breaker management APP and a self-healing control APP in an intelligent fusion terminal.
(3) Cloud side control process
And the platform of the Internet of things of the distribution main station area deploys software for realizing a cloud side control flow, and is used for collecting self-healing control information reported by the intelligent fusion terminal, displaying the operation condition and the self-healing state on the main station side, and realizing the coordination self-healing function of the distribution main station area. The specific flow of the cloud side control flow is shown in fig. 7.
Firstly, the value of a power distribution main station FA function marking bit SysFaInvalid _ YC is read and set to be 1, which indicates that the main station has FA complete functions and is only realized in the main station, and the fusion terminal only has an information uploading function.
The platform of the Internet of things of the distribution area receives current, electric quantity, active power and voltage information in the distribution area reported by each intelligent fusion terminal of the distribution area every day, calculates a network topology structure in each distribution area according to the received information, and periodically issues the calculated network topology structure to the corresponding intelligent fusion terminal in the distribution area every day.
Switch fault information and platform district self-healing that platform thing networking platform monitoring each distribution station reported to the police were studied and judged, operation process information table, look over whether have the self-healing to take place in each distribution station, to having the distribution station that the self-healing takes place, check this distribution station and whether satisfy: the whole transformer area only has KgDySgZ _ YX equal to 1, KgGzSgZ _ YX equal to 0, a primary switch KgDySgZ _ YX equal to 1 of the transformer area is in a brake-off state, and a communication switch of the transformer area is in existence. And if the self-healing FA operation result and the whole process are not met, displaying the self-healing FA operation result and the whole process on the platform interface of the platform area Internet of things. If the self-healing FA operation result and the whole process are displayed on the platform interface of the platform area Internet of things.
Example 3
In order to verify the effectiveness of the technical scheme of the invention, an analog simulation environment is established, wherein the analog simulation system is composed of a primary circuit simulation system and a secondary device, and the specific simulation environment is shown in fig. 8. The primary circuit simulation system mainly comprises four parts: the intelligent circuit breaker comprises an analog power supply part, an intelligent circuit breaker part, a fault analog unit and an analog load. In order to simulate more actual lines, the primary line simulation system is designed into double power supply points, the double power supply points are mutually standby through the interconnection switch, and the primary line simulation system is unfolded according to three levels of a distribution side, a line side branch box and a user side meter box. The secondary part design simulates the operation of an actual low-voltage distribution network automation system, and is designed according to the principle of layered distribution, namely: the system comprises a main station layer, a fusion terminal layer and a breaker device, and a complete system structure is formed through a communication network. The communication mode of the convergence terminal and the master station layer supports a wired network and a wireless public network (4G/5G); the communication mode of the fusion terminal and the intelligent circuit breaker supports HPLC or micropower wireless; the intelligent circuit breaker and master station layer communication mode supports a wireless public network (4G/5G).
The control flows of each side in the embodiment 2 are deployed at the corresponding part of the simulation system, and then a fault simulation experiment is performed.
Through simulation experiment verification, the technical scheme of the invention can realize fault point positioning and fault type judgment under the condition that a fault occurs in the power distribution area, realize fault point isolation, automatically recover power supply to a non-fault area and realize a self-healing recovery function of the non-fault area of the power distribution area.
Compared with the prior power distribution station fault processing technology, the technical scheme of the application has the following beneficial effects:
1. based on a self-healing control mechanism of a 'cloud-pipe-edge-end' distribution station area, the fault processing efficiency is improved.
Based on comprehensive collection and comprehensive analysis of the state of equipment in the distribution transformer area, the topological relation of the low-voltage transformer area is automatically sensed, on the basis of fault information collected by the intelligent circuit breaker, the research and judgment positioning of faults and the self-healing recovery control of a non-fault area are realized through the cooperative calculation of the fusion terminal and the internet of things master station, the traditional fault processing mode adopting manual intervention is changed, and the accuracy and the timeliness of troubleshooting are greatly improved.
2. The low-voltage transformer area fine management is deepened, the fault first-aid repair efficiency is improved, and the power supply reliability is improved.
By effective deployment of self-healing systems such as automatic topology identification, fault positioning, power failure to the home, non-fault area recovery control mechanism and the like, normal construction, maintenance and rush-repair work efficiency of a power grid is improved, fault chances and fault power failure time are reduced, fault hidden dangers are timely discovered and treated, equipment operation reliability is improved, user power failure time is reduced, and fine management level of a power distribution station area is improved.
3. The intelligent circuit breaker device enables the traditional circuit breaker device and improves the intelligent application level.
A self-healing control algorithm is embedded into the breaker equipment, so that the breaker equipment becomes intelligent terminal equipment with primary and secondary integration, and a solid foundation is laid for the deep application development of the power internet of things.
It should be noted that the above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the foregoing embodiments illustrate the invention in detail, those skilled in the art will appreciate that: it is possible to modify the technical solutions described in the foregoing embodiments or to substitute some or all of the technical features thereof, without departing from the scope of the technical solutions of the present invention.
Claims (10)
1. Distribution station district self-healing control system based on local communication and topology discernment, its characterized in that: comprising a cloud-pipe-edge-end side subsystem, wherein:
the 'end' side subsystem comprises an intelligent circuit breaker serving as primary and secondary fusion intelligent terminal equipment and is used for protecting action tripping, fault acquisition and information uploading;
the ' side subsystem comprises an intelligent fusion terminal and is used for receiving information reported by the ' end ' side subsystem, analyzing the position and fault property of a fault point on the basis of identifying a topological structure in a power distribution station area, recovering power supply of a non-fault area and reporting a self-healing processing result to the ' cloud ' side subsystem;
the "pipe" side subsystem comprises a local communication network between the "end" side subsystem and the "side subsystem;
the cloud side subsystem comprises a power distribution main station area Internet of things platform and is used for collecting self-healing processing results reported by the side subsystem of each power distribution area and performing cross-area self-healing coordination control.
2. The power distribution grid self-healing control system based on in-situ communication and topology identification of claim 1, wherein: the information sent by the terminal side subsystem comprises at least one of tripping of switch protection action of the intelligent circuit breaker, tripping of three-phase voltage loss of the primary switch and detection of three-phase voltage loss by the non-primary switch.
3. The power distribution grid self-healing control system based on in-situ communication and topology identification of claim 2, wherein: the side subsystem is also used for checking the collected fault information reported by the end subsystem on the basis of topology identification of the distribution area, and issuing a command to close the upstream first-stage circuit breaker of the locking fault point to the end subsystem after the checking is successful.
4. The power distribution grid self-healing control system based on in-situ communication and topology identification of claim 1, wherein: the side subsystem is also used for checking the collected fault information reported by the end subsystem on the basis of the topology identification of the distribution substation, sending a remote control command to the end subsystem after the checking is successful, recovering the power supply of a non-fault area, and reporting a self-healing processing result to the cloud side subsystem.
5. The power distribution grid self-healing control system based on in-situ communication and topology identification of claim 1, wherein: the side subsystem acquires data of the end subsystem in a time period as a sample, and identifies the internal topological connection relation of the distribution station area by adopting a lightweight artificial intelligence algorithm.
6. The power distribution grid self-healing control system based on in-situ communication and topology identification of claim 1, wherein: the local communication network supports that the operation and smooth communication of the equipment can be continuously maintained for no less than 120s by the ' end ' side subsystem and the ' side subsystem under the condition of power failure, and the self-healing function is guaranteed.
7. The power distribution grid self-healing control system based on in-situ communication and topology identification of claim 1, wherein: the "pipe" side subsystem also includes a telecommunications network between the "edge" side subsystem and the "cloud" side subsystem.
8. The power distribution grid self-healing control system based on in-situ communication and topology identification of claim 1, wherein: the cloud side subsystem is also used for visually displaying the running and self-healing working condition states of the affiliated station area.
9. A self-healing control method for a power distribution area based on local communication and topology identification is characterized by comprising the following steps: a self-healing control system for use according to any one of claims 1 to 8, comprising a "cloud-pipe-edge-end" side control flow, wherein:
the end side control process is used for realizing the tripping of the end side subsystem protection action, the acquisition of faults and the uploading of information;
the 'side control process is used for enabling the' side subsystem to receive information reported by the 'end' side subsystem, analyzing the position and fault property of a fault point on the basis of identifying a topological structure in a power distribution station area, recovering power supply of a non-fault area, and reporting a self-healing processing result to the 'cloud' side subsystem;
the control flow on the ' pipe ' side is used for realizing the function of local communication between the ' end ' side subsystem and the ' side subsystem;
the cloud side control process is used for collecting self-healing processing results reported by side subsystems of each distribution substation area and performing cross-substation self-healing coordination control.
10. The power distribution grid self-healing control method based on in-situ communication and topology identification as claimed in claim 9, wherein: the side control process is also used for checking the collected fault information reported by the end side subsystem, and issuing a command to close the upper-level circuit breaker at the fault point to the end side subsystem after the checking is successful.
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