CN112834866A - Method for studying and judging power failure of distribution network - Google Patents

Method for studying and judging power failure of distribution network Download PDF

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Publication number
CN112834866A
CN112834866A CN202011627300.4A CN202011627300A CN112834866A CN 112834866 A CN112834866 A CN 112834866A CN 202011627300 A CN202011627300 A CN 202011627300A CN 112834866 A CN112834866 A CN 112834866A
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fault
distribution network
power
repair
information
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江雨辰
陈晓红
杨孝刚
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Anhui Dongzhe Power Technology Co ltd
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Anhui Dongzhe Power Technology Co ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08Locating faults in cables, transmission lines, or networks
    • G01R31/081Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/086Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors

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  • General Physics & Mathematics (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The invention discloses a method for studying and judging power faults of a distribution network, which comprises the following steps: the method comprises the following steps: analyzing through a general information model to obtain a power grid equipment topology model, and acquiring power supply transformer information of a fault point, wherein the power supply transformer information comprises a transformer name and a transformer unique code; step two: the distribution automation master station system researches and judges different fault points according to the detected distribution network signals; step three: and analyzing the fault according to the topological model, and positioning a trip point and a fault interval during fault. The invention has the beneficial effects that: the method is correct and effective, full type decision, full information monitoring, full online control and full flow control of the power distribution network faults are achieved, processing efficiency and control strength of the power distribution network faults are further improved, functional application of a power distribution automation system is deepened, and safety, high efficiency and standard management levels of power distribution network operation and fault handling are comprehensively improved.

Description

Method for studying and judging power failure of distribution network
Technical Field
The invention relates to the technical field of electric power, in particular to a method for studying and judging power faults of a distribution network.
Background
At present, the fault diagnosis method of the power distribution network mainly comprises an optimization method, an artificial neural network method and an expert system method. A typical application of expert systems in power grid fault diagnosis is systems based on production rules. Although the expert system is applied successfully at present, there are still many defects in practical application: the power system is a large and complex system, and it is difficult to obtain a complete knowledge base; under the condition of a large amount of fault information, the expert system can obtain a conclusion after searching a certain rule set in a matched knowledge base during reasoning, so the speed is very low during reasoning; the maintenance of the knowledge base is quite difficult when the power system architecture and protection configuration changes.
Disclosure of Invention
The invention aims to provide a method for studying and judging the power failure of a distribution network, which realizes full type decision, full information monitoring, full online control and full flow control of the power distribution network failure, further improves the processing efficiency and the control strength of the power distribution network failure, deepens the function application of a power distribution automation system, and comprehensively improves the safety, high efficiency and standard management level of the operation and failure disposal of the power distribution network.
The technical scheme of the invention is realized as follows:
a method for studying and judging power faults of a distribution network comprises the following steps:
the method comprises the following steps: analyzing through a general information model to obtain a power grid equipment topology model, and acquiring power supply transformer information of a fault point, wherein the power supply transformer information comprises a transformer name and a transformer unique code;
step two: the distribution automation master station system researches and judges different fault points according to the detected distribution network signals;
step three: analyzing a fault according to the topology model, positioning a trip point and a fault section during the fault, acquiring the current power failure range, and analyzing the real-time power supply topology according to the fault section, wherein the real-time power supply topology comprises information such as power failure equipment name, equipment unique code and the like;
step four: analyzing the universal information topological model, and acquiring a meter of a repair user, a meter of a user in the same group as the repair user, a meter of a user who is in the adjacent group with the repair user, and a meter of a power supply transformer of the repair user;
step five: the distribution automation master station system records the field work content in the fault first-aid repair link, can select specific safety measure information, and intelligently generates a power transmission instruction ticket according to an isolation and power transfer auxiliary decision scheme;
step six: after the whole fault processing is finished, the power distribution automation master station system generates a complete after-the-fact analysis report aiming at the fault.
Further, in the second step, the designed faults include short-circuit faults, earth loss faults, heavy line overload and bus voltage loss.
Further, in the fourth step, the meter of the repair user is charged or the meter of the repair user is not charged, but is charged with the meters of the users in the same group.
Furthermore, in the fourth step, the meters of the repair users and the users in the same group as the repair users are not electrified but are electrified with the meters of the users in the adjacent group of the repair users.
Furthermore, the distribution automation master station system supports log records of the whole fault processing process, supports record addition and deletion, establishes an interaction channel with the GOMS system, and supports fault records to be synchronized to a fault processing module of the GOMS system.
Further, in the sixth step, the post analysis report includes a fault brief report, time consumed for fault processing, and study and evaluation.
The invention has the beneficial effects that: the expert knowledge base is established without spending a large amount of experience; the diagnosis is quick and effective; the method has strong universality and is flexible and various, and when the structure and the protection configuration of the power system are changed, the method can quickly adapt to a new topological structure model of the power grid equipment. In addition, practical application shows that the method is correct and effective, full type decision, full information monitoring, full online control and full flow control of the power distribution network faults are achieved, the processing efficiency and the control strength of the power distribution network faults are further improved, the function application of a power distribution automation system is deepened, and the safety, high efficiency and standard management level of power distribution network operation and fault disposal is comprehensively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a flowchart of a method for determining a power failure of a distribution network.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
According to the embodiment of the invention, a method for studying and judging the power failure of a distribution network is provided.
Referring to fig. 1, a method for studying and judging a power failure of a distribution network according to an embodiment of the present invention includes
The method for studying and judging the power failure of the distribution network comprises the following steps:
the method comprises the following steps: analyzing through a general information model to obtain a power grid equipment topology model, and acquiring power supply transformer information of a fault point, wherein the power supply transformer information comprises a transformer name and a transformer unique code;
step two: the distribution automation master station system researches and judges different fault points according to the detected distribution network signals;
step three: analyzing a fault according to the topology model, positioning a trip point and a fault section during the fault, acquiring the current power failure range, and analyzing the real-time power supply topology according to the fault section, wherein the real-time power supply topology comprises information such as power failure equipment name, equipment unique code and the like;
step four: analyzing the universal information topological model, and acquiring a meter of a repair user, a meter of a user in the same group as the repair user, a meter of a user who is in the adjacent group with the repair user, and a meter of a power supply transformer of the repair user;
step five: the distribution automation master station system records the field work content in the fault first-aid repair link, can select specific safety measure information, and intelligently generates a power transmission instruction ticket according to an isolation and power transfer auxiliary decision scheme;
step six: after the whole fault processing is finished, the power distribution automation master station system generates a complete after-the-fact analysis report aiming at the fault.
Further, in the second step, the designed faults include short-circuit faults, earth loss faults, heavy line overload and bus voltage loss.
Further, in the fourth step, the meter of the repair user is charged or the meter of the repair user is not charged, but is charged with the meters of the users in the same group.
Furthermore, in the fourth step, the meters of the repair users and the users in the same group as the repair users are not electrified but are electrified with the meters of the users in the adjacent group of the repair users.
Furthermore, the distribution automation master station system supports log records of the whole fault processing process, supports record addition and deletion, establishes an interaction channel with the GOMS system, and supports fault records to be synchronized to a fault processing module of the GOMS system.
Further, in the sixth step, the post analysis report includes a fault brief report, time consumed for fault processing, and study and evaluation.
During specific implementation, the fault handling interface guided scene design is realized through dispatcher fault handling logic, the full flow of fault handling is realized, the control strength and level of faults are improved, the fault coverage of the power distribution network is improved, and the sensing capability of the faults is improved. The whole process of fault handling is graphical, and operation graphing of fault information, fault point setting, an isolation power conversion scheme, ground loss test pulling, safety measure execution and the like is achieved. The distribution network scheduling fault handling links are one-by-one corresponding to the process, and the process of handling the faults improves the efficiency of handling the faults. And (3) getting through barriers among systems, realizing the functions of multi-element information fusion, realizing timely fault information release and fault notification through GOMS and SG186 interfaces, and reducing the dispatching work intensity by intelligently assisting the analysis and calculation of a decision scheme.
The invention has the characteristics that: the invention relates to a full studying and judging method for fault handling of a power distribution network, which is characterized in that a set of full studying and judging fault handling closed-loop management flow which transversely covers all fault types of the power distribution network is established in a DMS system, covers common faults of short circuit fault, phase failure fault, bus voltage loss, land loss fault, line heavy overload and the like of the power distribution network, is in contact with fault handling service of the power distribution network, and longitudinally penetrates through the processes of fault sensing, fault analysis, isolation power transfer, fault rush repair, power transmission operation, ending and the like; after the DMS system receives the alarm information of various faults, the DMS system carries out active fault study and judgment perception after analyzing and identifying the effectiveness of the fault signals, and comprehensively analyzes the study and judgment results, thereby being convenient for commanding the operations of site search, isolation, transfer, supply and the like. For a dead-ground fault, the dead-ground point determination can be performed through various trial pull schemes. For phase failure, the phase failure point can be positioned according to the phase by combining the distribution and transformation three-phase voltage measurement of the downstream of the line. For large-area power failure caused by bus voltage loss, the system comprehensively considers a scheme of converting large-area power supply into power supply according to a system operation mode and the controllable condition of a terminal. The DMS system automatically analyzes the real-time topology according to the information of the positioned fault point or the loss point, the phase failure point, the overload point and the trip point, and provides a power failure information release and isolation power conversion plan; the DMS system provides a one-key sequence control function for the fault isolation power conversion plan, and adds a safety locking logic in the aspect of anti-misoperation to realize automatic sequential remote control on a remote control equipment list after the dispatching confirms that the plan is correct; the DMS system provides a function of manually setting fault points for positioning errors and scheme errors in the fault sensing and isolation power conversion processes, and re-releases a fault isolation power conversion scheme based on the current real-time operation mode after the fault points are set; the DMS is communicated with the GOMS information interaction, the DMS system sends the fault power failure information to the GOMS, and the latest power failure range is dynamically synchronized to the GOMS in real time in the fault handling process; the DMS system supports and dispatches the record of relevant fault information and the selection of safety measure equipment in a fault emergency repair ring section, and supports the collection of the record information to a fault recording module; the safety measure support reads the safety measure information in the electronic fault first-aid repair list, and is convenient for safety check of field operation matters in scheduling. The DMS system can generate a scheduling instruction ticket when the emergency maintenance is finished and the power transmission is finished according to the fault isolation power conversion scheme and the safety measure, and realizes the related operation of the scheduling instruction when the power transmission is finished; after the whole fault processing is finished, the system automatically pushes out a structural and multidimensional analysis evaluation report.
Meanwhile, the new method for diagnosing the power failure of the distribution network does not need to spend a large amount of experience to establish an expert knowledge base; the diagnosis is quick and effective; the method has strong universality and is flexible and various, and when the structure and the protection configuration of the power system are changed, the method can be quickly adapted to a new power grid equipment topological structure model.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (6)

1. A method for studying and judging the power failure of a distribution network is characterized by comprising the following steps:
the method comprises the following steps: analyzing through a general information model to obtain a power grid equipment topology model, and acquiring power supply transformer information of a fault point, wherein the power supply transformer information comprises a transformer name and a transformer unique code;
step two: the distribution automation master station system researches and judges different fault points according to the detected distribution network signals;
step three: analyzing a fault according to the topology model, positioning a trip point and a fault section during the fault, acquiring the current power failure range, and analyzing the real-time power supply topology according to the fault section, wherein the real-time power supply topology comprises information such as power failure equipment name, equipment unique code and the like;
step four: analyzing the universal information topological model, and acquiring a meter of a repair user, a meter of a user in the same group as the repair user, a meter of a user who is in the adjacent group with the repair user, and a meter of a power supply transformer of the repair user;
step five: the distribution automation master station system records the field work content in the fault first-aid repair link, can select specific safety measure information, and intelligently generates a power transmission instruction ticket according to an isolation and power transfer auxiliary decision scheme;
step six: after the whole fault processing is finished, the power distribution automation master station system generates a complete after-the-fact analysis report aiming at the fault.
2. The method for studying and judging the power failure of the distribution network according to claim 1, wherein the designed failures in the second step include short-circuit failures, earth loss failures, heavy line overload and bus voltage loss.
3. The method for studying and judging power failure of distribution network as claimed in claim 1, wherein in the fourth step, the meter of the user for reporting repair is charged or the meter of the user for reporting repair is not charged, but is charged with the meter of the same group of users.
4. The method for studying and judging power failure of a distribution network according to claim 1, wherein the meters of the repair users and the users in the same group as the repair users in the fourth step are not charged but are charged with the meters of the users in the adjacent group as the repair users.
5. The method for studying and judging the power failure of the distribution network according to claim 1, wherein the distribution automation master station system supports log recording of the whole process of the failure processing, supports record addition and deletion, establishes an interaction channel with a GOMS system, and synchronizes the support failure recording to a failure processing module of the GOMS system.
6. The method according to claim 1, wherein in the sixth step, the post-analysis report includes a fault brief report, time consumed for fault processing, and a study evaluation.
CN202011627300.4A 2020-12-31 2020-12-31 Method for studying and judging power failure of distribution network Pending CN112834866A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113011999A (en) * 2021-04-20 2021-06-22 陕西省地方电力(集团)有限公司宝鸡供电分公司 Multi-tree model-based rapid implementation method for power distribution automation power failure research and judgment
CN113608062A (en) * 2021-06-24 2021-11-05 深圳供电局有限公司 Power distribution network fault positioning method and system and fault recovery method and system
CN113625082A (en) * 2021-08-06 2021-11-09 国网宁夏电力有限公司 Power distribution network equipment fault studying and judging method based on machine learning algorithm model
CN113640601A (en) * 2021-07-30 2021-11-12 国网福建省电力有限公司 Power distribution network fault research and judgment post analysis system and method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113011999A (en) * 2021-04-20 2021-06-22 陕西省地方电力(集团)有限公司宝鸡供电分公司 Multi-tree model-based rapid implementation method for power distribution automation power failure research and judgment
CN113608062A (en) * 2021-06-24 2021-11-05 深圳供电局有限公司 Power distribution network fault positioning method and system and fault recovery method and system
CN113608062B (en) * 2021-06-24 2023-03-03 深圳供电局有限公司 Power distribution network fault positioning method and system and fault recovery method and system
CN113640601A (en) * 2021-07-30 2021-11-12 国网福建省电力有限公司 Power distribution network fault research and judgment post analysis system and method
CN113640601B (en) * 2021-07-30 2022-11-08 国网福建省电力有限公司 Power distribution network fault research and judgment post analysis system and method
CN113625082A (en) * 2021-08-06 2021-11-09 国网宁夏电力有限公司 Power distribution network equipment fault studying and judging method based on machine learning algorithm model

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