CN116316541A - Power distribution network fault self-healing method for protecting control device and related device - Google Patents
Power distribution network fault self-healing method for protecting control device and related device Download PDFInfo
- Publication number
- CN116316541A CN116316541A CN202211342578.6A CN202211342578A CN116316541A CN 116316541 A CN116316541 A CN 116316541A CN 202211342578 A CN202211342578 A CN 202211342578A CN 116316541 A CN116316541 A CN 116316541A
- Authority
- CN
- China
- Prior art keywords
- switch
- fault
- power distribution
- distribution network
- self
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000012545 processing Methods 0.000 claims description 44
- 238000002955 isolation Methods 0.000 claims description 43
- 238000004458 analytical method Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 abstract description 7
- 230000006855 networking Effects 0.000 abstract description 4
- 230000004048 modification Effects 0.000 abstract description 3
- 238000012986 modification Methods 0.000 abstract description 3
- 239000013307 optical fiber Substances 0.000 abstract description 3
- 230000007246 mechanism Effects 0.000 description 14
- 238000010586 diagram Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000001934 delay Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 210000000987 immune system Anatomy 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/28—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for meshed systems
-
- 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
- H02J13/00006—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 information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—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 information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
- H02J13/00017—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 information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus using optical fiber
-
- 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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Abstract
The application discloses a distribution network fault self-healing method of a protection control device and a related device, wherein intelligent terminals are deployed at all switches to collect electrical data in real time, so that the electrical data can be transmitted to a distributed protection control device in real time through optical fibers by a communication function. Meanwhile, a rule driving model of the protection control device is formulated, faults of different topological structures can be effectively met in real time, dynamic modification of self-healing setting values and the like can be realized, an open-loop power distribution network and a closed-loop power distribution network can be adaptively adjusted to corresponding fault self-healing methods according to rules, reliability and instantaneity of protection can be improved, and requirements of real-time operation, networking and high performance of the power distribution network are met. Therefore, the technical problems of poor adaptability, high requirement on device resource performance and weak real-time performance of the existing self-healing method are solved.
Description
Technical Field
The application relates to the technical field of electric power, in particular to a power distribution network fault self-healing method for protecting a control device and a related device.
Background
At present, 95% of the factors affecting the electricity consumption condition of users in China are due to faults of the power distribution network, the network structure of the power distribution network is more complex along with the access of mass equipment to the power distribution network, the load types are gradually increased, and the fault protection technology of the power distribution network is severely challenged by the change of the system operation mode. The self-healing technology plays an important role in the protection of the power distribution network, just like an immune system of the power distribution network can improve the reliability of the power distribution network, and has an important role in ensuring the safe and stable operation of the power distribution network.
However, in the existing power distribution network protection control device, the protection fixed value is often set in advance and deterministically only according to a specific topological structure and fault type, so that the power distribution network fault self-healing flexibility is poor, the power distribution network protection control device is difficult to adaptively adjust and modify in real time and dynamically according to the running condition of the power distribution network, and the requirements of real-time running, networking and high performance of the power distribution network are difficult to meet. Meanwhile, in the aspect of the fault self-healing function of the power distribution network of the protection control device, a plurality of self-healing applications with different constant value settings are often constructed in an exhaustion method, and the execution requirements of the self-healing applications with the different constant value settings are met in a very short time in a rotation execution mode, so that the problems of overhigh resource performance requirement and weak real-time performance of the device are caused. In order to meet the ever-increasing level of development and user demands of the power distribution network, the self-healing control technology should also be increased.
Disclosure of Invention
The application provides a power distribution network fault self-healing method for protecting a control device and a related device, which are used for solving the technical problems of poor adaptability, high requirement on device resource performance and weak real-time performance of the existing self-healing method.
In view of this, a first aspect of the present application provides a power distribution network fault self-healing method for protecting a control device, the method including:
s1, acquiring electrical data and state quantity of each switch of a power distribution network, and operating characteristics and topological structure characteristics of the power distribution network;
s2, executing the step S3 when the operation characteristic is open loop and the topological structure characteristic is unchanged, and executing the step S3 after modifying the fixed value when the operation characteristic is open loop and the topological structure characteristic is changed;
s3, dividing the power distribution network into a plurality of power distribution areas, determining the power distribution area where the fault occurs according to the fault current information of the switch, and obtaining first fault positioning information, wherein the power distribution areas are as follows: a distribution line segment surrounded by adjacent switches; determining a switch to be disconnected according to the first fault positioning information, the fault current information and the switch refusing signal, and completing the isolation processing of the open-loop power distribution network; after isolation, controlling the switch to be closed or kept in an open state according to the electrified condition of the switch and the first fault positioning information, and completing the self-healing treatment of the open-loop power distribution network;
s4, executing the step S5 when the operation characteristic is closed loop and the topological structure characteristic is unchanged, and executing the step S5 after modifying the fixed value when the operation characteristic is closed loop and the topological structure characteristic is changed;
s5, determining a power distribution area where the fault occurs according to the fault power direction of the switch, and obtaining second fault positioning information; determining a switch to be disconnected according to the second fault positioning information, the fault current information and the switch refusing signal, and completing the isolation processing of the closed-loop power distribution network; and if the fault-free area which cannot recover the power supply exists after isolation, the external power supply is used for supplying the power to the fault-free area, so that the self-healing processing of the closed-loop power distribution network is completed.
Optionally, the power distribution network is divided into a plurality of power distribution areas, and the power distribution areas where the faults occur are determined according to the fault current information of the switch, so as to obtain first fault positioning information, where the power distribution areas are: the distribution network line segment enclosed by the adjacent switches specifically comprises:
defining a distribution network line section surrounded by adjacent switches as a distribution area, and enabling the distribution area associated with the switches to be called an associated area of the switches;
and dividing the power distribution network into a plurality of power distribution areas, and analyzing the power distribution areas where faults occur according to fault current information reported by each switch to obtain first fault positioning information.
Optionally, determining the switch to be disconnected according to the first fault location information, the fault current information and the switch refusing signal, and completing the isolation processing of the open-loop power distribution network, including:
when fault current flows through a first switch, and a power distribution area associated with the first switch has a fault area, the first switch is controlled to be disconnected, wherein the first switch is a sectionalized switch or a contact switch;
when the adjacent switch of the first switch sends out a switch refusing signal, the first switch is controlled to be disconnected;
when the collected fault current information belongs to a second switch or an adjacent switch of the second switch, judging whether the adjacent switch of the second switch and an associated power distribution area have faults or not after delaying for a preset time, and if so, controlling the second switch to be disconnected, wherein the second switch is a non-contact switch.
Optionally, after the isolation, according to the electrification condition of the switch and the first fault positioning information, the switch is controlled to be closed or kept in an open state, so as to complete the self-healing process of the open-loop power distribution network, and the method specifically comprises the following steps:
when one side of the third switch is out of voltage and no fault occurs in the power distribution area associated with the third switch, after a preset delay, the third switch is controlled to be closed, and the third switch is a contact switch;
when one side of the third switch is out of voltage and a fault occurs in a power distribution area associated with the third switch, controlling the third switch to be kept in an off state;
when the third switch receives a switch refusing signal sent by a switch adjacent to the third switch, the third switch is controlled to be kept in an off state;
and when the two sides of the third switch are electrified and the power distribution network has only one interconnection switch, controlling the third switch to be kept in an off state.
Optionally, determining the power distribution area where the fault occurs according to the fault power direction of the switch to obtain the second fault location information specifically includes:
and when the one-phase current of the fourth switch exceeds the fault current of the setting value, the fourth switch sends a signal reflecting the fault power direction to the adjacent switch, and fault location is carried out according to the fault power direction to obtain second fault location information.
Optionally, determining the switch to be disconnected according to the second fault location information, the fault current information and the switch refusing signal, and completing the closed-loop power distribution network isolation processing, which specifically includes:
when fault current flows through the fourth switch and a power distribution area associated with the fourth switch has a fault area, the fourth switch is controlled to be disconnected, wherein the fourth switch is a sectionalized switch or a contact switch;
and when the adjacent switch of the fourth switch sends out a switch refusing signal, controlling the fourth switch to be turned off, and completing automatic isolation of the closed-loop power distribution network.
Optionally, if there is a fault-free area where power cannot be restored after the isolation, power is supplied to the fault-free area through an external power supply to complete self-healing processing of the closed-loop power distribution network, which specifically includes:
after the fault area is isolated, if a fault-free area incapable of recovering power supply exists, dividing the fault-free area into a plurality of micro-networks, and supplying power to each micro-network by accessing a small-capacity power supply.
A second aspect of the present application provides a power distribution network fault self-healing system for protecting a control device, the system comprising:
the acquisition unit is used for acquiring the electrical data and state quantity of each switch of the power distribution network, and the operation characteristics and the topological structure characteristics of the power distribution network;
the first analysis unit is used for triggering the first processing unit when the operation characteristic is open-loop and the topological structure characteristic is unchanged, and triggering the first processing unit after modifying the fixed value when the operation characteristic is open-loop and the topological structure characteristic is changed;
the first processing unit is used for dividing the power distribution network into a plurality of power distribution areas, determining the power distribution area where the fault occurs according to the fault current information of the switch, and obtaining first fault positioning information, wherein the power distribution areas are as follows: a distribution line segment surrounded by adjacent switches; determining a switch to be disconnected according to the first fault positioning information, the fault current information and the switch refusing signal, and completing the isolation processing of the open-loop power distribution network; after isolation, controlling the switch to be closed or kept in an open state according to the electrified condition of the switch and the first fault positioning information, and completing the self-healing treatment of the open-loop power distribution network;
the second analysis unit is used for triggering the second processing unit when the operation characteristic is closed loop and the topological structure characteristic is unchanged, and triggering the second processing unit after modifying the fixed value when the operation characteristic is closed loop and the topological structure characteristic is changed;
the second processing unit is used for determining a power distribution area where the fault occurs according to the fault power direction of the switch to obtain second fault positioning information; determining a switch to be disconnected according to the second fault positioning information, the fault current information and the switch refusing signal, and completing the isolation processing of the closed-loop power distribution network; if there is no fault area which can not restore the power supply after isolation.
A third aspect of the present application provides a power distribution network fault self-healing apparatus for protecting a control device, the apparatus including 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 steps of the power distribution network fault self-healing method for protecting the control device according to the first aspect according to the instructions in the program code.
A fourth aspect of the present application provides a computer readable storage medium for storing program code for executing the power distribution network fault self-healing method of the protection control device according to the first aspect.
From the above technical scheme, the application has the following advantages:
compared with the prior art, the intelligent terminal is deployed at each switch of the line, so that the intelligent terminal is not influenced by a network topology structure and a system operation mode, the operation information of the line at the local end can be acquired in real time, the information is stored in a database, and the information is transmitted to the distributed protection control device in real time through an optical fiber by a communication function; the formulated regular driving model of the power distribution network protection control device can efficiently meet faults of different topological structures in real time, dynamically modify self-healing setting values and the like, enable an open-loop power distribution network and a closed-loop power distribution network to be adaptively adjusted to corresponding fault self-healing methods according to rules, improve the reliability and instantaneity of protection, and meet the requirements of real-time operation, networking and high performance of the power distribution network. Therefore, the technical problems of poor adaptability, high requirement on device resource performance and weak real-time performance of the existing self-healing method are solved.
Drawings
Fig. 1 is a schematic flow chart of an embodiment of a power distribution network fault self-healing method for protecting a control device provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a power distribution network fault self-healing system provided in an embodiment of the present application;
fig. 3 is a schematic diagram of a rule driving model of a protection control device for a power distribution network according to an embodiment of the present application;
FIG. 4 is a schematic diagram of an exemplary open loop power distribution network provided in an embodiment of the present application;
fig. 5 is a schematic diagram of a fault location mechanism of an open loop power distribution network provided in an embodiment of the present application;
FIG. 6 is a schematic diagram of an exemplary closed-loop power distribution network provided in an embodiment of the present application;
fig. 7 is a schematic structural diagram of an embodiment of a power distribution network fault self-healing system for protecting a control device according to an embodiment of the present application.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will clearly and completely describe the technical solution in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
As shown in fig. 2, fig. 2 is a structure of a power distribution network fault self-healing system in the present application; in the power distribution network, intelligent terminals are deployed on switches of lines on two sides of the power distribution network, integrated sampling is carried out on electric data such as voltage and current and on-off state quantity, the electric data and the on-off state quantity are uploaded to a distributed protection control device through an optical fiber communication network, the protection control device is responsible for a line area, sampling data of a plurality of nodes are collected, networking protection decision is carried out, protection control decision instructions are sent to each intelligent terminal, and the intelligent terminal carries out direct tripping control on each switch.
The intelligent terminal is internally provided with a data acquisition function, is not influenced by a network topological structure and a system operation mode, can acquire operation information of a local line in real time, stores the information in a database, and transmits the information to the distributed protection control device in real time through a communication function.
The distributed protection control device collects and stores real-time data information transmitted by the intelligent terminal, the protection application module can read data to the data platform according to the performed application, and the application module can self-define and deploy related applications to realize strong coupling of the data and the applications. Meanwhile, the regular driving model of the power distribution network protection control device in the device can be used for effectively meeting faults of different topological structures in real time, dynamically modifying self-healing setting values can be achieved, and different self-healing methods are adopted, so that the reliability and the instantaneity of protection are improved. The communication function transmits the control result to the terminal equipment in real time, and controls the corresponding switch in real time.
S1, S2 are transformer substation outgoing line switches, switch A, B, C, E, F, G is a sectional switch, switch D is a contact switch, each switch is provided with an intelligent terminal, information transmission is carried out through the intelligent terminal, each switch and a protection control device, and the switch is opened and closed by receiving a protection control instruction of the intelligent terminal.
Referring to fig. 1, a power distribution network fault self-healing method for protecting a control device provided in an embodiment of the present application includes:
the intelligent terminal is used for integrally sampling the electrical data such as voltage and current and the switching state quantity, and the electrical data is used as the calculation requirement of the steps 103 and 105.
The invention establishes a rule driving model of the power distribution network protection control device, and realizes the self-healing of the power distribution network faults according to the operation characteristics and the topological structure characteristics of the power distribution network and the rule paths, and is particularly shown in figure 3.
Mainly consider the protection control device open-loop power distribution network fault self-healing method and the closed-loop power distribution network fault self-healing method based on rule driving, and the following 4 rule paths are divided into in fig. 3:
rule path 1: when the operation mode of the power distribution network is identified as open-loop operation and the topology structure is not changed, setting values and setting delays in a self-healing mechanism followed later are not changed, the self-adaptive selection is carried out on open-loop fault self-healing according to the inherent setting values, the open-loop self-healing mechanism is adopted for execution, and the fault self-healing is completed.
Rule path 2: when the operation mode of the power distribution network is identified as open-loop operation, if the topological structure changes, the setting value and the setting delay in a self-healing mechanism followed later change, the self-healing of the open-loop fault is carried out by adaptively selecting the dynamic modification setting value, and the self-healing of the fault is completed by adopting the open-loop self-healing mechanism.
Rule path 3: when the operation mode of the power distribution network is identified to be closed-loop operation and the topology structure is not changed, setting values and setting delays in a self-healing mechanism followed later are not changed, the self-adaptive selection is carried out on open-loop fault self-healing according to the inherent setting values, the closed-loop self-healing mechanism is adopted for execution, and the fault self-healing is completed.
Rule path 4: when the operation mode of the power distribution network is identified to be closed-loop operation and the topology structure is changed, the setting value and the setting delay in a self-healing mechanism followed later are changed, the setting value is selected dynamically and modified in a self-adaptive mode to perform open-loop fault self-healing, and the closed-loop self-healing mechanism is adopted to perform the fault self-healing.
See in particular the two paths of steps 102-103 and the two paths of steps 104-105.
it should be noted that, when the protection control device identifies that the line is in an open loop running state according to a rule, the device executes a fault self-healing method of the open loop power distribution network, where the self-healing control includes: and the three links of fault positioning, automatic fault isolation and power restoration of sound areas of the open-loop power distribution network are realized. A typical open loop distribution network is shown in fig. 4.
Switch adjacency means that there is no other switch in the path between switch D and switch E on one line in the distribution network; the distribution area being defined by a group of adjacent switches, e.g. switch A, switch B, switch C
. Similarly, the distribution network can be divided into 8 distribution areas:
. The distribution area associated with a switch is referred to as the associated area of the switch.
Wherein:
1. the fault location of the open loop distribution network is described as follows:
in open loop distribution networks, distribution areas
For example, the fault location mechanism employed by the present invention is shown in fig. 5.
2. The open loop distribution network isolation is described as follows:
taking a sectionalizer A and a tie switch D as examples, a mechanism for fault isolation of the distribution network in open-loop operation is as follows:
1) A switch and distribution area
If no faults occur in the two distribution areas, the intelligent terminal does not send a protection control signal to trip the switch A to isolate the fault area when the fault current flows through the switch A; the intelligent terminal will send out a control signal to trip switch a only when an internal fault occurs in one of the distribution areas associated with switch a.
2) When the switch A receives the switch refusing information sent by the switch S1 and the switch B adjacent to the switch A, the protection control device makes a control decision to the intelligent terminal to immediately break the switch A to isolate a fault area.
3) The intelligent terminal processing steps of the non-contact switch A (including a 10kv incoming line, an outgoing line switch and a feeder coloring sectional switch of a transformer substation and an switching station) are as follows: if fault current information possibly coming from the switch or other adjacent switches is collected, continuously collecting information of the adjacent switches within a short delay (different along with the change of a topological structure) after the protection is started, judging whether a power distribution area associated with the switch S1 has faults or not according to the collected information, if so, tripping the switch, and if not, keeping the switch in an original state.
3. After isolation, the self-healing of the open loop distribution network is described as follows:
1) And if one side of the interconnecting switch D fails, the non-interconnecting switch automatically realizes fault area isolation according to the mechanism of the sections 2 and 2), so that one side of the interconnecting switch is powered off.
2) For a distribution network operated in an open loop, the mechanism for automatically recovering power in a sound area is as follows:
(1) if one side of the tie switch D is out of voltage and the distribution area associated with the tie switch
If no fault occurs in the internal part, after a preset delay T (changing along with the change of the topological structure), the interconnecting switch is automatically switched on, and the power supply is restored in the sound area at the fault side.
(2) If one side of tie switch D is out of voltage and a fault occurs in the distribution area associated with the tie switch, the tie switch maintains the off state.
(3) If the tie switch D receives the switch refusing information sent by the adjacent switch, the tie switch maintains the switching-off state.
(4) If both sides of one tie switch D are electrified, the tie switch maintains the opening state.
(5) If there are multiple tie switches, their priorities can be set by adjusting the delay T, providing different restoration approaches.
It should be noted that, when the protection control device identifies that the line is in a closed-loop running state according to a rule, the device will execute a fault self-healing method of the closed-loop power distribution network, where the self-healing control includes: and the three links of fault positioning, automatic fault isolation and power restoration in sound areas of the closed-loop power distribution network are realized. A typical closed loop power distribution network is described below as shown in fig. 6.
Wherein:
1. the fault location of the closed-loop distribution network is described as follows:
in a closed-loop power distribution network, if an intelligent terminal collects that one phase of a switch D flows through fault current exceeding a setting value, the intelligent terminal sends information reflecting the fault power direction to the intelligent terminals of a switch B and a switch E adjacent to the intelligent terminal and a protection control device. If the reported fault power directions all point to the area
Inside, the fault occurs inside the area; if the reported fault power direction points to the outside of the area or all endpoints are not reported, the power distribution area has no fault.
2. The closed loop power distribution network fault isolation is described as follows:
taking switch A as an example, a mechanism for fault isolation of a power distribution network in closed-loop operation is as follows:
1) A switch and distribution area
If no faults occur in the two distribution areas, the intelligent terminal does not send a protection control signal to trip the switch A to isolate the fault area when the fault current flows through the switch A; only when an internal fault occurs in one of the distribution areas associated with switch a will the intelligent terminal send a control signal to trip switch a to isolate the faulty area.
2) When the switch A receives the switch refusing information sent by the switch S1 and the switch B adjacent to the switch A, the protection control device makes a control decision to the intelligent terminal to immediately break the switch A to isolate a fault area.
3. After isolation, the self-healing of the closed-loop power distribution network is described as follows:
1) If the capacity of each power supply in the power distribution network is large enough to supply power to all loads on a closed loop circuit, after the fault occurs and the fault area is isolated, the normal power supply of the sound area is automatically recovered without taking other control measures.
2) If the small-capacity power supply is cut off and isolated from the fault area and processed, and then a sound area incapable of recovering power supply exists, the protection control device is required to divide the rest sound area without power supply into a plurality of proper micro-networks according to the load of the actual situation carried by each section of feeder line, and then the corresponding small-capacity power supply is connected to supply power to the micro-networks. In this process, a partial load is sometimes thrown away to meet the capacity limit of the small-capacity power supply.
The foregoing is a power distribution network fault self-healing method of a protection control device provided in an embodiment of the present application, and the following is a power distribution network fault self-healing system of a protection control device provided in an embodiment of the present application.
Referring to fig. 7, in an embodiment of the present application, a power distribution network fault self-healing system for protecting a control device is provided, including:
an obtaining unit 201, configured to obtain electrical data and state quantities of each switch of the power distribution network, and operation characteristics and topology characteristics of the power distribution network;
the first analysis unit 202 is configured to trigger the first processing unit when the operation feature is open loop and the topology feature is unchanged, and to trigger the first processing unit after modifying the fixed value when the operation feature is open loop and the topology feature is changed;
the first processing unit 203 is configured to divide the power distribution network into a plurality of power distribution areas, determine a power distribution area where a fault occurs according to fault current information of the switch, and obtain first fault location information, where the power distribution area is: a distribution line segment surrounded by adjacent switches; determining a switch to be disconnected according to the first fault positioning information, the fault current information and the switch refusing signal, and completing the isolation processing of the open-loop power distribution network; after isolation, the switch is controlled to be closed or kept in an open state according to the electrified condition of the switch and the first fault positioning information, so that the self-healing processing of the open-loop power distribution network is completed;
the second analysis unit 204 is configured to trigger the second processing unit when the operation feature is closed loop and the topology feature is unchanged, and to trigger the second processing unit after modifying the fixed value when the operation feature is closed loop and the topology feature is changed;
a second processing unit 205, configured to determine a power distribution area where a fault occurs according to a fault power direction of the switch, to obtain second fault location information; determining a switch to be disconnected according to the second fault positioning information, the fault current information and the switch refusing signal, and completing the isolation processing of the closed-loop power distribution network; if there is no fault area which can not restore the power supply after isolation.
Further, in this embodiment of the present application, there is also provided a power distribution network fault self-healing device for protecting a control device, where the device includes 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 power distribution network fault self-healing method for protecting the control device according to the method embodiment according to the instruction in the program code.
Further, in the embodiment of the application, a computer readable storage medium is further provided, and the computer readable storage medium is used for storing program codes, and the program codes are used for executing the power distribution network fault self-healing method for protecting the control device.
It will be clear to those skilled in the art that, for convenience and brevity of description, the specific working procedures of the above-described system and unit may refer to the corresponding procedures in the foregoing method embodiments, which are not repeated here.
The terms "first," "second," "third," "fourth," and the like in the description of the present application and in the above-described figures, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be capable of operation in sequences other than those illustrated or described herein, for example. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that in this application, "at least one" means one or more, and "a plurality" means two or more. "and/or" for describing the association relationship of the association object, the representation may have three relationships, for example, "a and/or B" may represent: only a, only B and both a and B are present, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods may be implemented in other ways. 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 each embodiment of the present application 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 application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions to cause 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 methods described in the embodiments of the present application. And the aforementioned storage medium includes: u disk, mobile hard disk, read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.
The above embodiments are merely for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should 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 corresponding technical solutions.
Claims (10)
1. The utility model provides a protection control device's distribution network trouble self-healing method which characterized in that includes:
s1, acquiring electrical data and state quantity of each switch of a power distribution network, and operating characteristics and topological structure characteristics of the power distribution network;
s2, executing the step S3 when the operation characteristic is open loop and the topological structure characteristic is unchanged, and executing the step S3 after modifying the fixed value when the operation characteristic is open loop and the topological structure characteristic is changed;
s3, dividing the power distribution network into a plurality of power distribution areas, determining the power distribution area where the fault occurs according to the fault current information of the switch, and obtaining first fault positioning information, wherein the power distribution areas are as follows: a distribution line segment surrounded by adjacent switches; determining a switch to be disconnected according to the first fault positioning information, the fault current information and the switch refusing signal, and completing the isolation processing of the open-loop power distribution network; after isolation, controlling the switch to be closed or kept in an open state according to the electrified condition of the switch and the first fault positioning information, and completing the self-healing treatment of the open-loop power distribution network;
s4, executing the step S5 when the operation characteristic is closed loop and the topological structure characteristic is unchanged, and executing the step S5 after modifying the fixed value when the operation characteristic is closed loop and the topological structure characteristic is changed;
s5, determining a power distribution area where the fault occurs according to the fault power direction of the switch, and obtaining second fault positioning information; determining a switch to be disconnected according to the second fault positioning information, the fault current information and the switch refusing signal, and completing the isolation processing of the closed-loop power distribution network; and if the fault-free area which cannot recover the power supply exists after isolation, the external power supply is used for supplying the power to the fault-free area, so that the self-healing processing of the closed-loop power distribution network is completed.
2. The method for self-healing a power distribution network fault of a protection control device according to claim 1, wherein the power distribution network is divided into a plurality of power distribution areas, the power distribution area where the fault occurs is determined according to the fault current information of the switch, and first fault location information is obtained, and the power distribution areas are: the distribution network line segment enclosed by the adjacent switches specifically comprises:
defining a distribution network line section surrounded by adjacent switches as a distribution area, and enabling the distribution area associated with the switches to be called an associated area of the switches;
and dividing the power distribution network into a plurality of power distribution areas, and analyzing the power distribution areas where faults occur according to fault current information reported by each switch to obtain first fault positioning information.
3. The power distribution network fault self-healing method of the protection control device according to claim 2, wherein the determining the switch to be disconnected according to the first fault location information, the fault current information and the switch refusal signal, and completing the open loop power distribution network isolation processing specifically comprises:
when fault current flows through a first switch, and a power distribution area associated with the first switch has a fault area, the first switch is controlled to be disconnected, wherein the first switch is a sectionalized switch or a contact switch;
when the adjacent switch of the first switch sends out a switch refusing signal, the first switch is controlled to be disconnected;
when the collected fault current information belongs to a second switch or an adjacent switch of the second switch, judging whether the adjacent switch of the second switch and an associated power distribution area have faults or not after delaying for a preset time, and if so, controlling the second switch to be disconnected, wherein the second switch is a non-contact switch.
4. The power distribution network fault self-healing method of the protection control device according to claim 3, wherein after the isolation, the switch is controlled to be closed or kept in an open state according to the electrification condition of the switch and the first fault positioning information, and the power distribution network fault self-healing processing of the open loop is completed specifically comprises:
when one side of the third switch is out of voltage and no fault occurs in the power distribution area associated with the third switch, after a preset delay, the third switch is controlled to be closed, and the third switch is a contact switch;
when one side of the third switch is out of voltage and a fault occurs in a power distribution area associated with the third switch, controlling the third switch to be kept in an off state;
when the third switch receives a switch refusing signal sent by a switch adjacent to the third switch, the third switch is controlled to be kept in an off state;
and when the two sides of the third switch are electrified and the power distribution network has only one interconnection switch, controlling the third switch to be kept in an off state.
5. The method for self-healing a power distribution network fault of a protection control device according to claim 1, wherein determining a fault occurrence power distribution area according to a fault power direction of a switch, to obtain second fault location information, specifically includes:
and when the one-phase current of the fourth switch exceeds the fault current of the setting value, the fourth switch sends a signal reflecting the fault power direction to the adjacent switch, and fault location is carried out according to the fault power direction to obtain second fault location information.
6. The method for self-healing a power distribution network fault of a protection control device according to claim 5, wherein the determining the switch to be disconnected according to the second fault location information, the fault current information and the switch refusal signal, and completing the closed-loop power distribution network isolation processing specifically comprises:
when fault current flows through the fourth switch and a power distribution area associated with the fourth switch has a fault area, the fourth switch is controlled to be disconnected, wherein the fourth switch is a sectionalized switch or a contact switch;
and when the adjacent switch of the fourth switch sends out a switch refusing signal, controlling the fourth switch to be turned off, and completing automatic isolation of the closed-loop power distribution network.
7. The power distribution network fault self-healing method of the protection control device according to claim 6, wherein if a fault-free area incapable of recovering power supply exists after isolation, power is supplied to the fault-free area through an external power supply, and closed loop power distribution network self-healing processing is completed, and the method specifically comprises:
after the fault area is isolated, if a fault-free area incapable of recovering power supply exists, dividing the fault-free area into a plurality of micro-networks, and supplying power to each micro-network by accessing a small-capacity power supply.
8. The utility model provides a protection controlling means's distribution network trouble self-healing system which characterized in that includes:
the acquisition unit is used for acquiring the electrical data and state quantity of each switch of the power distribution network, and the operation characteristics and the topological structure characteristics of the power distribution network;
the first analysis unit is used for triggering the first processing unit when the operation characteristic is open-loop and the topological structure characteristic is unchanged, and triggering the first processing unit after modifying the fixed value when the operation characteristic is open-loop and the topological structure characteristic is changed;
the first processing unit is used for dividing the power distribution network into a plurality of power distribution areas, determining the power distribution area where the fault occurs according to the fault current information of the switch, and obtaining first fault positioning information, wherein the power distribution areas are as follows: a distribution line segment surrounded by adjacent switches; determining a switch to be disconnected according to the first fault positioning information, the fault current information and the switch refusing signal, and completing the isolation processing of the open-loop power distribution network; after isolation, controlling the switch to be closed or kept in an open state according to the electrified condition of the switch and the first fault positioning information, and completing the self-healing treatment of the open-loop power distribution network;
the second analysis unit is used for triggering the second processing unit when the operation characteristic is closed loop and the topological structure characteristic is unchanged, and triggering the second processing unit after modifying the fixed value when the operation characteristic is closed loop and the topological structure characteristic is changed;
the second processing unit is used for determining a power distribution area where the fault occurs according to the fault power direction of the switch to obtain second fault positioning information; determining a switch to be disconnected according to the second fault positioning information, the fault current information and the switch refusing signal, and completing the isolation processing of the closed-loop power distribution network; if there is no fault area which can not restore the power supply after isolation.
9. A power distribution network fault self-healing device for protecting a control device, the device 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 power distribution network fault self-healing method of the protection control device according to any one of claims 1 to 7 according to the instructions in the program code.
10. A computer readable storage medium for storing program code for performing the power distribution network fault self-healing method of the protection control device according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211342578.6A CN116316541A (en) | 2022-10-31 | 2022-10-31 | Power distribution network fault self-healing method for protecting control device and related device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211342578.6A CN116316541A (en) | 2022-10-31 | 2022-10-31 | Power distribution network fault self-healing method for protecting control device and related device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116316541A true CN116316541A (en) | 2023-06-23 |
Family
ID=86801942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211342578.6A Pending CN116316541A (en) | 2022-10-31 | 2022-10-31 | Power distribution network fault self-healing method for protecting control device and related device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116316541A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245072A (en) * | 2018-09-17 | 2019-01-18 | 南京国电南自电网自动化有限公司 | Adaptive type feeder automation fault handling method on the spot based on region serial number |
| CN111786364A (en) * | 2020-06-02 | 2020-10-16 | 国电南瑞科技股份有限公司 | Distributed complex power distribution network fault rapid self-healing control method and system |
| CN112134263A (en) * | 2020-08-20 | 2020-12-25 | 南京因泰莱电器股份有限公司 | Distribution network self-healing method based on peer-to-peer information interaction |
-
2022
- 2022-10-31 CN CN202211342578.6A patent/CN116316541A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245072A (en) * | 2018-09-17 | 2019-01-18 | 南京国电南自电网自动化有限公司 | Adaptive type feeder automation fault handling method on the spot based on region serial number |
| CN111786364A (en) * | 2020-06-02 | 2020-10-16 | 国电南瑞科技股份有限公司 | Distributed complex power distribution network fault rapid self-healing control method and system |
| CN112134263A (en) * | 2020-08-20 | 2020-12-25 | 南京因泰莱电器股份有限公司 | Distribution network self-healing method based on peer-to-peer information interaction |
Non-Patent Citations (1)
| Title |
|---|
| 刘健 等: "一种快速自愈的分布智能馈线自动化系统", 《电力系统自动化》, pages 62 - 66 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Lim et al. | Service restoration methodology for multiple fault case in distribution systems | |
| EP2308149B1 (en) | Feeder automation system and method for operating the same | |
| US6347027B1 (en) | Method and apparatus for automated reconfiguration of an electric power distribution system with enhanced protection | |
| CN110994786B (en) | Single intelligent distributed power distribution terminal control method based on peer-to-peer communication | |
| CN111682508A (en) | Differential protection and rapid self-healing method suitable for regional power distribution network | |
| CN109245072B (en) | Self-adaptive in-situ feeder automation fault processing method based on regional sequence number | |
| CA2361382C (en) | Method and apparatus for automated reconfiguration of an electric power distribution system with enhanced protection | |
| CA3226863A1 (en) | Restoration management | |
| CN106208351B (en) | Region spare power automatic switching system connection cuts the method and system of small power supply | |
| Wan et al. | Multi‐agent application of substation protection coordination with distributed generators | |
| Zhu et al. | Multiagents-based wide area protection with best-effort adaptive strategy | |
| EP2555141A1 (en) | A method, a system, a server, a control element, a computer program and a computer program product for operating a power grid having decentralized control elements | |
| Lo et al. | A multi-agent based service restoration in distribution network with distributed generations | |
| CN116316541A (en) | Power distribution network fault self-healing method for protecting control device and related device | |
| CN112736872B (en) | Power distribution network protection control strategy optimization method based on real-time analysis of operation mode | |
| Coury et al. | Improving the protection of EHV teed feeders using local agents | |
| Fan et al. | Feeder automation within the scope of substation automation | |
| Alves et al. | Advanced Decentralized Protection, Control and Monitoring Strategies for Distribution Automation | |
| CN114221308B (en) | Fault isolation method and device based on distributed intelligent automation terminal | |
| CN105207182B (en) | A kind of method and system of power distribution network locality protection | |
| TW202029612A (en) | Method for controlling renewable energy and distribution automation integrated system wherein the distribution automation system can transmit the faulty feeder switch switching information to the renewable energy management system for performing the grid-connected impact analysis based on the load change information | |
| Pham et al. | Decentralized distribution automation system-scalability and deployment challenges | |
| CN114094554B (en) | Method and related device for preventing error isolation by master station in-situ cooperative self-healing | |
| AU2004269785A1 (en) | Fault detection and location in power distribution networks | |
| EP3937344A1 (en) | Method for operating intelligent electronic device and an intelligent electronic device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20230623 |