CN113295968B - Fault positioning method for multi-source information of power distribution network master station - Google Patents
Fault positioning method for multi-source information of power distribution network master station Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- 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
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Abstract
The invention relates to a fault positioning method of multi-source information of a power distribution network main station, which comprises the steps of collecting all signals uploaded by an automatic terminal on a feeder line after a fault; after the delay time T, the automatic terminal on the feeder line does not upload any signal any more, and all the collected signals are sequentially judged according to the first judgment condition, the second judgment condition, the third judgment condition and the fourth judgment condition to obtain a judgment result. According to the method, all signals on the feeder line are collected, and then the collected signals are sequentially judged by adopting the first judgment condition, the second judgment condition, the third judgment condition and the fourth judgment condition to obtain the judgment result, so that automatic fault positioning is realized, the fault positioning identification efficiency is high, and the judgment result is accurate. The fault positioning method for the multi-source information of the power distribution network main station can be suitable for fault positioning of feeders with multiple coexisting automation modes and also suitable for fault positioning of multiple types, and is wide in practicability.
Description
Technical Field
The invention relates to the technical field of automation, in particular to a fault positioning method for multi-source information of a power distribution network master station.
Background
The existing distribution network automatically utilizes a computer, a network and terminal equipment to realize monitoring and remote control of power supply and distribution equipment, so that the distribution network runs in a reliable and controllable state and provides stable power utilization for users. However, due to the influence of factors such as the operating environment, the equipment quality and the power grid fluctuation of the power distribution network, the power distribution network has faults. After the trouble of distribution network takes place, distribution network automation equipment can gather the fault signal, and the fault signal includes switch relay protection signal, switch on-off closing signal, trouble shutting and the remote measuring data of voltage electric current to upload to the automation master station of distribution network, demonstrate to the dispatcher of distribution network, carry out fault location and processing with supplementary dispatcher, carry out the power restoration to the non-trouble section.
With the development of automation technology, the modes of fault location and processing of the power distribution network include a voltage time/voltage current mode, a main station centralized mode, an intelligent distribution mode, a differential protection mode and a fault indicator mode, and if the five modes coexist, the location logic is difficult to realize fault location. And when the distribution network is automatically constructed, different types of automation modes can be adopted for construction in different periods, even multiple automation modes are used on a single line, and the single-type fault location logic cannot be suitable for multiple types of automation modes.
A plurality of automatic terminals are generally deployed on a single power distribution network line, the line can be segmented, and a dispatcher analyzes and judges a fault section according to a fault signal through signals uploaded by different automatic terminals. When a fault occurs, signals uploaded by a plurality of automatic terminals exist, the signals comprise signals of types such as protection, opening and closing, locking and the like, a master station system of the power distribution network can display more signals, a dispatcher of the power distribution network needs to search and screen out available signals in the various signals, and fault location is carried out by matching with a circuit topological diagram of the power distribution network, so that fault processing is carried out. Therefore, a dispatcher manually processes information of various automation modes in a mass of signals, and the problems of overlong fault interval judgment time and inaccurate positioning are caused by the fact that signals are easy to leak or the analysis range is incomplete.
Disclosure of Invention
The embodiment of the invention provides a fault positioning method for multi-source information of a power distribution network master station, which is used for solving the technical problems that a plurality of automatic terminals exist in the existing power distribution network line, the fault positioning processing is manual processing by a dispatcher, and the time for judging a fault interval is long and the accuracy is low.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
a fault positioning method of multi-source information of a power distribution network main station is applied to a feeder line of a power distribution network and provided with a plurality of automatic terminals, and comprises the following steps:
collecting all signals uploaded by an automation terminal on a feeder line after a fault;
after the delay time T, the automatic terminal on the feeder line does not upload signals any more, and all the acquired signals are sequentially judged according to a first judgment condition, a second judgment condition, a third judgment condition and a fourth judgment condition to obtain a judgment result;
the automatic terminal signal acquisition component on the feeder line comprises an outlet switch, at least three section switches and at least three fault indicators, wherein the three section switches are respectively a first section switch, a second section switch and a third section switch, and the three fault indicators are respectively a first fault indicator, a second fault indicator and a third fault indicator; all the collected signals comprise a protection action signal, a topology protection action signal, a switch closing signal, a switch opening signal, an alarm signal and a fault blocking signal of the feeder line; the outlet switch is connected with the first fault indicator, the first fault indicator is connected with the first section switch, the first section switch is connected with the second fault indicator, the second fault indicator is connected with the second section switch, the second section switch is connected with the third fault indicator, and the third fault indicator is connected with the third section switch.
Preferably, the fault positioning method for the multi-source information of the power distribution network master station comprises the following steps: judging if all the collected signals meet the first judgment condition to obtain a judgment result;
the first judgment condition comprises a successful reclosing signal and a closing signal of the outlet switch, switching-off signals and fault blocking signals of the two section switches, or a failed reclosing signal and a switching-off signal of the outlet switch, and a switching-off signal and a fault blocking signal of the first section switch.
Preferably, the first section switch is used as the first section switch, and if all the collected signals include a failure signal and a switching signal of the outlet switch, and a switching signal and a fault blocking signal of the first section switch, the fault position is obtained to be between the outlet switch and the first section switch;
if all the collected signals comprise a successful reclosing signal and a switch closing signal of the outlet switch, switch opening signals and fault locking signals of the first section switch and the second section switch, the position where a fault occurs is obtained to be between the first section switch and the second section switch;
and if all the collected signals comprise a successful coincidence signal and a switch closing signal of the outlet switch, switch opening signals and fault locking signals of the second section switch and the third section switch, and a switch closing signal of the first section switch, obtaining that the position with the fault is between the second section switch and the third section switch.
Preferably, the fault positioning method for the multi-source information of the power distribution network master station comprises the following steps: if all the collected signals do not meet the first judgment condition and all the collected signals meet the second judgment condition, obtaining a judgment result;
the second judgment condition includes a switch opening signal and a protection action signal of the outlet switch, and no protection action signal of each section switch, or the switch opening signal and the protection action signal of the outlet switch, and at least one protection action signal of the section switch.
Preferably, the first section switch is used as the first section switch, and if all the acquired signals only contain the switch opening signal and the protection action signal of the exit switch, the position where the fault occurs is obtained between the exit switch and the first section switch;
if all the collected signals only contain a switch opening signal and a protection action signal of the outlet switch and a protection action signal of the first section switch, the position where the fault occurs is obtained to be between the first section switch and the second section switch;
if all the collected signals include the switch opening signal and the protection action signal of the outlet switch and the protection action signals of the first section switch and the second section switch, the position where the fault occurs is between the second section switch and the third section switch.
Preferably, the fault location method for multi-source information of the distribution network main station comprises the following steps: if all the collected signals do not meet the first judgment condition and the second judgment condition and all the collected signals meet the third judgment condition, obtaining a judgment result;
the third judgment condition comprises a switch opening signal and a topology protection action signal of the outlet switch, a switch opening signal and a topology protection action signal of the first section switch, and a topology protection action signal without two other section switches; or the switch opening signal and the topology protection action signal of two adjacent section switches, and the topology protection action signal without the exit switch and the other section switch.
Preferably, the first section switch is used as the first section switch, and if all the collected signals include a switch opening signal and a topology protection action signal of the outlet switch, a switch opening signal and a topology protection action signal of the first section switch, and no topology protection action signal of the second section switch and the third section switch, the fault position is obtained to be between the outlet switch and the first section switch;
if all the collected signals comprise a switching-off signal and a topology protection action signal of the first section switch, a switching-off signal and a topology protection action signal of the second section switch, and a topology protection action signal without the outlet switch and the third section switch, the position where a fault occurs is obtained to be between the first section switch and the second section switch;
if all the collected signals include a switch opening signal and a topology protection action signal of the second section switch, a switch opening signal and a topology protection action signal of the third section switch, and no topology protection action signal of the outlet switch and the first section switch, the position of the fault between the second section switch and the third section switch is obtained.
Preferably, the fault positioning method for multi-source information of the power distribution network master station comprises the following steps: if all the collected signals do not meet the first judgment condition, the second judgment condition and the third judgment condition, and all the collected signals meet the fourth judgment condition, obtaining a judgment result;
the fourth judgment condition comprises a switch opening signal and a protection action signal of the outlet switch, and no signals of the section switch and the fault indicator; or the switch opening signal and the protection action signal of the outlet switch, the alarm signal of the first fault indicator, and the signals of the section switch and the other two fault indicators are not available; or the switch opening signal and the protection action signal of the outlet switch, the alarm signals of the first fault indicator and the second fault indicator, and the signals of the section switch and the third fault indicator are not provided.
Preferably, the first fault indicator is used as a first fault indicator, and if all the collected signals include a switch opening signal and a protection action signal of the outlet switch, and there are no alarm signals of the three fault indicators and no opening, closing and fault blocking signals of the three section switches, the fault position is obtained on the feeder line behind the outlet switch;
if all the collected signals comprise a switch opening signal and a protection action signal of the outlet switch, an alarm signal of the first fault indicator, an alarm signal without the second fault indicator and the third fault indicator, and opening, closing and fault locking signals without the three section switches, the position where a fault occurs is obtained on a feeder line behind the first fault indicator;
if all the collected signals include a switch opening signal and a protection action signal of the outlet switch, alarm signals of the first fault indicator and the second fault indicator, alarm signals without the third fault indicator and opening, closing and fault locking signals without the three section switches, the position where a fault occurs on the feeder line behind the second fault indicator is obtained.
Preferably, the fault positioning method for the multi-source information of the power distribution network master station comprises the following steps: if all the collected signals do not meet the first judgment condition, the second judgment condition, the third judgment condition and the fourth judgment condition, the position with the fault cannot be obtained.
According to the technical scheme, the embodiment of the invention has the following advantages: the fault positioning method of the multi-source information of the power distribution network main station comprises the steps of collecting all signals uploaded by an automatic terminal on a feeder line after a fault; after the delay time T, the automatic terminal on the feeder line does not upload any signal any more, and all the collected signals are sequentially judged according to the first judgment condition, the second judgment condition, the third judgment condition and the fourth judgment condition to obtain a judgment result. According to the method, all signals on the feeder line are collected, and then the collected signals are sequentially judged by adopting the first judgment condition, the second judgment condition, the third judgment condition and the fourth judgment condition to obtain the judgment result, so that automatic fault positioning is realized, the fault positioning identification efficiency is high, and the judgment result is accurate. The fault location method of the multi-source information of the power distribution network main station can be suitable for fault location of feeders with multiple coexisting automation modes and multiple types of fault location, is wide in practicability, and solves the technical problems that existing power distribution network lines have multiple automation terminals, fault location processing is manual processing of dispatchers, time for judging fault intervals is long, and accuracy is low.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art 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 for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a flowchart illustrating steps of a method for locating a fault of multi-source information of a distribution network master station according to an embodiment of the present invention.
Fig. 2 is a flowchart of a fault location method for multi-source information of a distribution network master station according to an embodiment of the present invention.
Fig. 3 is a topology structure diagram of a feeder line of a fault location method for multi-source information of a distribution network master station according to an embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the application provides a fault positioning method of multi-source information of a power distribution network main station, which is applied to a feeder line of a power distribution network and is provided with a plurality of automatic terminals and is used for solving the technical problems that the existing power distribution network line has a plurality of automatic terminals, the fault positioning processing is manual processing by a dispatcher, the time for judging a fault interval is long, and the accuracy is low.
The first embodiment is as follows:
fig. 1 is a flowchart illustrating steps of a method for locating a fault of multi-source information of a power distribution network master station according to an embodiment of the present invention, and fig. 2 is a flowchart illustrating a method for locating a fault of multi-source information of a power distribution network master station according to an embodiment of the present invention.
As shown in fig. 1 and fig. 2, an embodiment of the present invention provides a fault location method for multi-source information of a distribution network master station, which is applied to a feeder line of a distribution network and provided with a plurality of automation terminals, and includes the following steps:
and S10, collecting all signals uploaded by the automatic terminal on the feeder line after the fault.
It should be noted that, in the power distribution network, after a fault occurs, each automation terminal on the feeder line uploads its own electrical signal to the master station of the power distribution network to be collected. In this embodiment, the distribution network has more than one feeder line, and the electric signal collected by the main station has more than one feeder line, so that the main station distinguishes the collected electric signal according to different feeder lines, and the collected signal is the signal on the same feeder line. The collected signals comprise a protection action signal, a switch closing signal, a switch opening signal, an alarm signal and a fault blocking signal.
In the embodiment of the invention, the case that the feeder of the power distribution network comprises components such as an outlet switch, at least three section switches and at least three fault indicators is taken as a description, a plurality of automatic terminals are arranged on the feeder for collecting electric signals of the components, and a plurality of main signals are uploaded by each automatic terminal, so that the main station receives the signals of multi-source information. The three section switches are respectively a first section switch, a second section switch and a third section switch, and the three fault indicators are respectively a first fault indicator, a second fault indicator and a third fault indicator.
And S20, after the time delay T, the automatic terminal on the feeder line does not upload any signal any more, and all the collected signals are sequentially judged according to the first judgment condition, the second judgment condition, the third judgment condition and the fourth judgment condition to obtain a judgment result.
It should be noted that the delay time T may be set according to the actual demand of the power distribution network, and is not limited in this embodiment. In step S20, the delay time T is used to determine and analyze the signal, mainly to ensure that all signals on the feeder line are collected after the fault is sent, so as to provide accurate data for the analysis and determination of the fault location position.
In the embodiment of the invention, all the acquired signals are sequentially judged according to the first judgment condition, the second judgment condition, the third judgment condition and the fourth judgment condition, and the obtained judgment result has two conditions, namely, the position of the fault of the feeder line is obtained, and the position of the fault of the feeder line cannot be obtained.
In the embodiment of the invention, whether all signals on the acquisition feeder line meet a first judgment condition is judged, and if the signals meet the first judgment condition, a judgment result is directly output; if not, judging whether all the collected signals meet a second judgment condition, and if so, directly outputting a judgment result; if not, judging whether all the acquired signals meet a third judgment condition or not, and if so, directly outputting a judgment result; if not, judging whether all the collected signals meet a fourth judgment condition or not, and if so, directly outputting a judgment result; if the fault location is not met, the output judgment result is that the fault location cannot be located, namely, the location of the fault location in the feeder line is unknown.
The invention provides a fault positioning method of multi-source information of a power distribution network main station, which comprises the steps of collecting all signals uploaded by an automatic terminal on a feeder line after a fault; after the delay time T, the automatic terminal on the feeder line does not upload any signal any more, and all the collected signals are sequentially judged according to the first judgment condition, the second judgment condition, the third judgment condition and the fourth judgment condition to obtain a judgment result. According to the method, all signals on the feeder line are collected, and then the collected signals are sequentially judged by adopting the first judgment condition, the second judgment condition, the third judgment condition and the fourth judgment condition to obtain the judgment result, so that automatic fault positioning is realized, the fault positioning identification efficiency is high, and the judgment result is accurate. The fault location method of the multi-source information of the power distribution network main station can be suitable for fault location of feeders with multiple coexisting automation modes and multiple types of fault location, is wide in practicability, and solves the technical problems that existing power distribution network lines have multiple automation terminals, fault location processing is manual processing of dispatchers, time for judging fault intervals is long, and accuracy is low.
The method for locating the fault of the multi-source information of the power distribution network master station can locate the fault by using the existing power distribution network automatic terminal signal at the automatic master station side of the power distribution network without adding new equipment on site; and fault location can be realized by different multi-signals, and comprehensive fault location is realized. According to the fault positioning method of the multi-source information of the power distribution network master station, no matter which mode information (multi-source information) is received by the master station, fault positioning can be achieved.
Fig. 3 is a topology structure diagram of a feeder line of a fault location method for multi-source information of a distribution network master station according to an embodiment of the present invention.
As shown in fig. 3, in an embodiment of the invention, the components of the automated terminal acquisition signal on the feeder line include an outlet switch F1, a first section switch S1, a second section switch S2, a third section switch S3, a first fault indicator G1, a second fault indicator G2, and a third fault indicator G3. Lines ab, bc, cd are line segments separated by a segmented switch, respectively. Outlet switch F1 is connected to first fault indicator G1, first fault indicator G1 is connected to first section switch S1, first section switch S1 is connected to second fault indicator G2, second fault indicator G2 is connected to second section switch S2, second section switch S2 is connected to third fault indicator G3, and third fault indicator G3 is connected to third section switch S3.
It should be noted that the acquired signals include a switch opening signal, a switch closing signal, a coincidence success signal, a coincidence failure signal, and a protection action signal of the outlet switch F1, switch opening signals, switch closing signals, fault blocking signals, topology protection signals, and protection action signals of the first section switch S1, the second section switch S2, and the third section switch S3, and alarm signals of the first fault indicator G1, the second fault indicator G2, and the third fault indicator G3.
As shown in fig. 2 and fig. 3, in an embodiment of the present invention, the method for locating a fault of multi-source information of a distribution network master station includes: if all the collected signals meet the first judgment condition, judging to obtain a judgment result; the first judgment condition comprises a coincidence success signal and a switch closing signal of the outlet switch, a switch opening signal and a fault blocking signal of the two section switches, or a coincidence failure signal and a switch opening signal of the outlet switch, and a switch opening signal and a fault blocking signal of the first section switch. The first section switch is used as a first section switch, if all the collected signals include a reclosing failure signal and a switching opening signal of the outlet switch F1, a switching opening signal and a fault blocking signal of the first section switch S1, and opening signals of the second section switch S2 and the third section switch S3, the position where a fault occurs is obtained between the outlet switch F1 and the first section switch S1, namely, the section where the fault occurs is a line ab section on the feeder line.
In the embodiment of the present invention, if all the acquired signals include a success signal and a closing signal of the outlet switch F1, a switching signal and a fault blocking signal of the first section switch S1 and the second section switch S2, and a switching signal and a fault blocking signal of the third section switch S3, it is obtained that a fault position is between the first section switch S1 and the second section switch S2, that is, a fault section is a line bc section on the feeder line.
In the embodiment of the present invention, if all the collected signals include a successful switching signal and a switching closing signal of the outlet switch F1, switching opening signals and failure locking signals of the second section switch S2 and the third section switch S3, and a switching closing signal of the first section switch S1, it is obtained that the position where the failure occurs is between the second section switch S2 and the third section switch S3, that is, the section where the failure occurs is the line cd section on the feeder line.
It should be noted that the first determination condition is mainly used for determining that the feeder line in the voltage-time type/voltage-current mode has a fault. As shown in table 1 below, when the feeder line fails, the outlet switch F1 of the feeder line trips due to a fault, and a protection action signal and a switch opening signal are uploaded. And the section switches S1, S2 and S3 on the feeder are subjected to voltage loss and brake separation. If the exit switch F1 is subjected to reclosing operation, the section switches S1, S2 and S3 on the feeder line are switched on after a certain time delay after single side is electrified, and the section switches are switched on one by one along the topology of the feeder line from the power supply direction-finding load side; the section switches S1, S2 and S3 on the feeder line are sequentially switched on, when a fault section is switched on, the feeder line outlet switch F1 is tripped again in a voltage time mode, the fault upstream and downstream section switches are switched off and are powered off, and a locking signal is uploaded; for the voltage current mode, the fault upstream section switch is accelerated to trip, the upstream section switch and the downstream section switch upload a blocking signal, the downstream section switch keeps opening, and the feeder outlet switch F1 does not need to trip.
Table 1 shows the contents of the first judgment condition
As shown in fig. 2 and fig. 3, in an embodiment of the present invention, the method for locating a fault of multi-source information of a distribution network master station includes: if all the collected signals do not meet the first judgment condition and all the collected signals meet the second judgment condition, obtaining a judgment result;
the second judgment condition comprises a switch opening signal and a protection action signal of the outlet switch, a protection action signal without each section switch, or the switch opening signal and the protection action signal of the outlet switch, and a protection action signal of at least one section switch.
In the embodiment of the invention, the first section switch is used as the first section switch, and if all the collected signals only contain the switch opening signal and the protection action signal of the outlet switch, the position with the fault is obtained between the outlet switch and the first section switch; if all the collected signals only comprise a switch opening signal and a protection action signal of the outlet switch and a protection action signal of the first section switch, the position where the fault occurs is between the first section switch and the second section switch; if all the collected signals comprise a switch opening signal and a protection action signal of the outlet switch and protection action signals of the first section switch and the second section switch, the position where the fault occurs is between the second section switch and the third section switch.
It should be noted that the second determination condition is mainly used for determining that the feeder line in the master station centralized mode has a fault. As shown in table 2 below, when the feeder line fails, the outlet switch F1 of the feeder line trips due to the failure, and uploads a protection action signal and a switch opening signal. And a section switch through which fault current on the feeder line flows uploads a protection action signal to the main station. The outlet switch F1 of the feeder line searches the topology along the load side, and the fault is positioned at the last subsection switch rear section which uploads the protective action signal on the topology.
Table 2 shows the contents of the second judgment condition
As shown in fig. 2 and fig. 3, in an embodiment of the present invention, the method for locating a fault of multi-source information of a distribution network master station includes: if all the collected signals do not meet the first judgment condition and the second judgment condition and all the collected signals meet the third judgment condition, obtaining a judgment result;
the third judgment condition comprises a switch opening signal and a topology protection action signal of the outlet switch, a switch opening signal and a topology protection action signal of the first section switch, and a topology protection action signal without two other section switches; or the switch opening signal and the topology protection action signal of two adjacent section switches, and the topology protection action signal of the non-exit switch and the other section switch.
In the embodiment of the invention, the first section switch is used as the first section switch, and if all the collected signals comprise a switch opening signal and a topology protection action signal of the outlet switch, a switch opening signal and a topology protection action signal of the first section switch, and no topology protection action signal of the second section switch and the third section switch, the position where the fault occurs is between the outlet switch and the first section switch; if all the collected signals comprise a switch opening signal and a topology protection action signal of the first section switch, a switch opening signal and a topology protection action signal of the second section switch, and a topology protection action signal of the non-outlet switch and the third section switch, the position where the fault occurs is between the first section switch and the second section switch; if all the collected signals comprise a switch opening signal and a topology protection action signal of the second section switch, a switch opening signal and a topology protection action signal of the third section switch, and a topology protection action signal of the non-outlet switch and the first section switch, the position of the fault between the second section switch and the third section switch is obtained.
It should be noted that the third determination condition is mainly used for determining that the feeder line in the intelligent distribution type mode has a fault. As shown in table 3 below, when a feeder line fails, the fault upper and lower section switches trip due to a fault, and a topology protection action signal and a switch opening signal of a topology protection type are uploaded. And the section switch through which the fault current on the feeder line flows uploads a topology protection action signal to the main station. And searching the load side edge topology by an outlet switch F1 of the feeder line, and positioning the fault at the last subsection switch rear section uploading the topology protection action signal on the topology.
Table 3 shows the contents of the third judgment condition
As shown in fig. 2 and fig. 3, in an embodiment of the present invention, the method for locating a fault of multi-source information of a distribution network master station includes: if all the collected signals do not meet the first judgment condition, the second judgment condition and the third judgment condition, and all the collected signals meet the fourth judgment condition, obtaining a judgment result;
the fourth judgment condition comprises a switch opening signal and a protection action signal of the outlet switch, and signals of a section switch and a fault indicator are not available; or the switch opening signal and the protection action signal of the outlet switch, the alarm signal of the first fault indicator, and the signals of the non-section switch and the other two fault indicators; or the switch opening signal and the protection action signal of the outlet switch, the alarm signals of the first fault indicator and the second fault indicator, and the signals of the non-section switch and the third fault indicator.
In the embodiment of the invention, the first fault indicator is used as the first fault indicator, if all the collected signals comprise switch opening signals and protection action signals of the outlet switch and no alarm signals of three fault indicators and opening, closing and fault locking signals of three section switches, the position where a fault occurs is obtained on a feeder line behind the outlet switch; if all the collected signals comprise a switch opening signal and a protection action signal of an outlet switch, an alarm signal of a first fault indicator, an alarm signal without a second fault indicator and a third fault indicator, and opening, closing and fault locking signals without three section switches, the position where a fault occurs is obtained on a feeder line behind the first fault indicator; if all the collected signals comprise switch opening signals and protection action signals of the outlet switch, alarm signals of the first fault indicator and the second fault indicator, alarm signals without a third fault indicator and opening, closing and fault locking signals without three section switches, the situation that the position with the fault is on the feeder line behind the second fault indicator is obtained.
The fourth determination condition is mainly used for determining that a feeder line of a failure indicator type mode has a failure. As shown in table 4 below, when the feeder line fails, the outlet switch F1 of the feeder line trips due to the failure, and uploads a protection action signal and a switch opening signal. And (4) uploading alarm signals from the topological fault indicators along the feeder line until no signal is uploaded from the fault indicator at the downstream of the fault, and positioning the fault at the rear section of the last fault indicator which uploads the alarm signals.
Table 4 shows the contents of the third judgment condition
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed 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 can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A fault positioning method of multi-source information of a power distribution network main station is applied to a feeder line of a power distribution network and provided with a plurality of automatic terminals, and is characterized by comprising the following steps:
collecting all signals uploaded by an automation terminal on a feeder line after a fault;
after the delay time T, the automatic terminal on the feeder line does not upload signals any more, and all the acquired signals are sequentially judged according to a first judgment condition, a second judgment condition, a third judgment condition and a fourth judgment condition to obtain a judgment result;
the automatic terminal signal acquisition component on the feeder line comprises an outlet switch, at least three section switches and at least three fault indicators, wherein the three section switches are respectively a first section switch, a second section switch and a third section switch, and the three fault indicators are respectively a first fault indicator, a second fault indicator and a third fault indicator; all the collected signals comprise a protection action signal, a topology protection action signal, a switch closing signal, a switch opening signal, an alarm signal and a fault blocking signal of the feeder line; the outlet switch is connected with the first fault indicator, the first fault indicator is connected with the first section switch, the first section switch is connected with the second fault indicator, the second fault indicator is connected with the second section switch, the second section switch is connected with the third fault indicator, and the third fault indicator is connected with the third section switch;
the first judgment condition comprises a successful reclosing signal and a closing signal of the outlet switch, switching-off signals and fault blocking signals of the two section switches, or a failed reclosing signal and a switching-off signal of the outlet switch, and a switching-off signal and a fault blocking signal of the first section switch;
the second judgment condition comprises a switch opening signal and a protection action signal of the outlet switch, a protection action signal without each section switch, or a switch opening signal and a protection action signal of the outlet switch, and a protection action signal of at least one section switch;
the third judgment condition comprises a switch opening signal and a topology protection action signal of the outlet switch, a switch opening signal and a topology protection action signal of the first section switch, and a topology protection action signal without two other section switches; or the switch opening signal and the topology protection action signal of two adjacent section switches, and the topology protection action signal without the exit switch and the other section switch;
the fourth judgment condition comprises a switch opening signal and a protection action signal of the outlet switch, and no signals of the section switch and the fault indicator; or the switch opening signal and the protection action signal of the outlet switch, the alarm signal of the first fault indicator, and the signals of the section switch and the other two fault indicators are not available; or the switch opening signal and the protection action signal of the outlet switch, the alarm signals of the first fault indicator and the second fault indicator, and the signals of the section switch and the third fault indicator are not provided.
2. The method for locating the fault of the multi-source information of the power distribution network master station according to claim 1, comprising the following steps of: and judging if all the acquired signals meet the first judgment condition to obtain a judgment result.
3. The method for locating the fault of the multi-source information of the power distribution network master station according to claim 2, wherein a first section switch is used as a first section switch, and if all collected signals comprise a reclosing failure signal and a switching opening signal of the exit switch, and a switching opening signal and a fault blocking signal of the first section switch, a fault position is obtained to be located between the exit switch and the first section switch;
if all the collected signals comprise a successful reclosing signal and a switch closing signal of the outlet switch, switch opening signals and fault locking signals of the first section switch and the second section switch, the position where a fault occurs is obtained to be between the first section switch and the second section switch;
and if all the collected signals comprise a successful coincidence signal and a switch closing signal of the outlet switch, switch opening signals and fault locking signals of the second section switch and the third section switch, and a switch closing signal of the first section switch, obtaining that the position with the fault is between the second section switch and the third section switch.
4. The method for locating the fault of the multi-source information of the power distribution network master station according to claim 1, comprising the following steps of: and if all the collected signals do not meet the first judgment condition and all the collected signals meet the second judgment condition, obtaining a judgment result.
5. The method for locating the fault of the multi-source information of the power distribution network main station according to claim 4, wherein a first section switch is used as a first section switch, and if all collected signals only contain a switch opening signal and a protection action signal of the exit switch, the fault position is obtained to be between the exit switch and the first section switch;
if all the collected signals only contain a switch opening signal and a protection action signal of the outlet switch and a protection action signal of the first section switch, the position where the fault occurs is obtained to be between the first section switch and the second section switch;
if all the collected signals include the switch opening signal and the protection action signal of the outlet switch and the protection action signals of the first section switch and the second section switch, the position where the fault occurs is between the second section switch and the third section switch.
6. The method for locating the fault of the multi-source information of the power distribution network master station according to claim 1, comprising the following steps of: and if all the collected signals do not meet the first judgment condition and the second judgment condition and all the collected signals meet the third judgment condition, obtaining a judgment result.
7. The method for locating the fault of the multi-source information of the power distribution network master station according to claim 6, wherein a first section switch is used as a first section switch, and if all collected signals include a switch opening signal and a topology protection action signal of the exit switch, a switch opening signal and a topology protection action signal of the first section switch, and no topology protection action signal of the second section switch and the third section switch, a fault position is obtained between the exit switch and the first section switch;
if all the collected signals comprise a switching-off signal and a topology protection action signal of the first section switch, a switching-off signal and a topology protection action signal of the second section switch, and a topology protection action signal without the outlet switch and the third section switch, the position where a fault occurs is obtained to be between the first section switch and the second section switch;
if all the collected signals include a switch opening signal and a topology protection action signal of the second section switch, a switch opening signal and a topology protection action signal of the third section switch, and no topology protection action signal of the outlet switch and the first section switch, the position of the fault between the second section switch and the third section switch is obtained.
8. The method for locating the fault of the multi-source information of the power distribution network master station according to claim 1, comprising the following steps of: and if all the collected signals do not meet the first judgment condition, the second judgment condition and the third judgment condition and all the collected signals meet the fourth judgment condition, obtaining a judgment result.
9. The method for locating the multi-source information fault of the power distribution network master station as claimed in claim 8, wherein a first fault indicator is used as a first fault indicator, and if all collected signals include a switch opening signal and a protection action signal of the outlet switch, and there are no alarm signals of the three fault indicators and no opening, closing and fault locking signals of the three section switches, then the position where the fault occurs is on a feeder line behind the outlet switch;
if all the collected signals comprise a switch opening signal and a protection action signal of the outlet switch, an alarm signal of the first fault indicator, an alarm signal without the second fault indicator and the third fault indicator, and opening, closing and fault locking signals without the three section switches, the position where a fault occurs is obtained on a feeder line behind the first fault indicator;
if all the collected signals include a switch opening signal and a protection action signal of the outlet switch, alarm signals of the first fault indicator and the second fault indicator, alarm signals without the third fault indicator and opening, closing and fault locking signals without the three section switches, the position where a fault occurs on the feeder line behind the second fault indicator is obtained.
10. The method for locating the fault of the multi-source information of the power distribution network master station according to claim 1, comprising the following steps of: if all the collected signals do not meet the first judgment condition, the second judgment condition, the third judgment condition and the fourth judgment condition, the position with the fault cannot be obtained.
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| CN102916409A (en) * | 2012-11-13 | 2013-02-06 | 山东电力集团公司济南供电公司 | Voltage-time type feeder automation running method based on parameter adjustment |
| CN104090208B (en) * | 2014-06-30 | 2016-08-17 | 国家电网公司 | Voltage-type distribution network failure method of disposal |
| CN105186471A (en) * | 2015-09-26 | 2015-12-23 | 国网山东省电力公司济南供电公司 | Power distribution network line fault detection device and method |
| CN105548801B (en) * | 2015-12-02 | 2018-12-07 | 南京四方亿能电力自动化有限公司 | Fault Locating Method suitable for power distribution network operation with closed ring |
| CN205544604U (en) * | 2016-03-30 | 2016-08-31 | 南京大全自动化科技有限公司 | Mode adaptive feeder automation device |
| CN109347093B (en) * | 2018-10-18 | 2022-07-22 | 南京南瑞继保电气有限公司 | Power distribution network self-healing control method combining master station with local control |
| CN109283438B (en) * | 2018-11-14 | 2021-03-30 | 长园深瑞继保自动化有限公司 | Fault positioning method for railway telecontrol main station through line |
| CN110417123A (en) * | 2019-07-26 | 2019-11-05 | 珠海市中力电力设备有限公司 | One kind being used for intelligent distributed distribution automation terminal |
| CN112510657A (en) * | 2020-11-11 | 2021-03-16 | 广西电网有限责任公司电力科学研究院 | Feeder automation line fault processing method and system with distributed power supply access |
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