阅读说明：本技术 一种基于配电网公专变数据的缺相故障研判方法及系统 (open-phase fault studying and judging method and system based on public and private power distribution network variable data ) 是由 陈宁钊 吕温望 倪亚超 洪文明 尤炜 陈子琛 赖绍元 陈木林 陈鸿毅 李宗云 于 2019-09-17 设计创作，主要内容包括：一种基于配电网公专变数据的缺相故障研判方法及系统,包括如下步骤：(1)解析地区配变数据文件,根据配变的台区号进行匹配解析,实现对配变三相电压数据的监测,其中,配变的属性包括公变和专变；(2)根据不同电压等级配变设置不同缺相的阈值；(3)实时检测属性为公变的且未挂检修、停役、故障、缺陷的配变的三相电压值任意一相的电压突降至设定的阈值以下,且该配变前三个时刻点的电压均大于20KV,则该配变发生缺相情况；(4)按照缺相配变所属馈线信息进行馈线配变信息召测,根据召测返回信息,将相同缺相情况配变找出；(5)根据拓扑供电信息进行判断,找到这些配变的共同缺相开关及缺相区间,在人机界面进行展示并可通过停电信息发布将故障信息同步至GOMS。(A phase-failure fault studying and judging method and system based on public and private power distribution network variable data comprises the following steps: (1) analyzing a regional distribution transformer data file, and performing matching analysis according to the station number of the distribution transformer to realize monitoring of three-phase voltage data of the distribution transformer, wherein the attributes of the distribution transformer comprise a public transformer and a private transformer; (2) setting different open-phase thresholds according to different voltage class distribution transformers; (3) detecting that the voltage of any one phase of the three-phase voltage value of the distribution transformer with the attribute of common transformer and without hanging overhaul, outage, fault and defect is suddenly reduced to be below a set threshold value, and if the voltages of the first three time points of the distribution transformer are all more than 20KV, the distribution transformer is in a phase-failure condition; (4) calling and testing feeder distribution transformation information according to the feeder information to which the phase-loss distribution transformation belongs, and finding out the distribution transformation under the same phase-loss condition according to calling and testing return information; (5) and judging according to the topology power supply information, finding the common phase-lack switches and phase-lack intervals of the distribution transformers, displaying on a human-computer interface, and synchronizing fault information to the GOMS through power failure information release.)

1. a phase-failure fault studying and judging method based on public and private power distribution network variable data is characterized by comprising the following steps: the method comprises the following steps:

(1) Analyzing a regional distribution transformer data file, and performing matching analysis according to the station number of the distribution transformer to realize monitoring of three-phase voltage data of the distribution transformer, wherein the attributes of the distribution transformer comprise a public transformer and a private transformer;

(2) Setting different open-phase thresholds according to different voltage class distribution transformers;

(3) detecting that the voltage of any one phase of the three-phase voltage value of the distribution transformer with the attribute of common transformer and without hanging overhaul, outage, fault and defect is suddenly reduced to be below a set threshold value, and if the voltages of the first three time points of the distribution transformer are all more than 20KV, the distribution transformer is in a phase-failure condition;

(4) calling and testing feeder distribution transformation information according to the feeder information to which the phase-loss distribution transformation belongs, and finding out the distribution transformation under the same phase-loss condition according to calling and testing return information;

(5) And judging according to the topology power supply information, finding the common phase-lacking switches and phase-lacking intervals of the distribution transformer, displaying on a human-computer interface, and synchronizing fault information to the GOMS through power failure information issuing.

2. the method for studying and judging the phase-missing fault based on the public and private transformation data of the power distribution network according to claim 1, wherein the method comprises the following steps: and (3) judging whether the phase-lack result is the phase-lack of the single distribution transformer, and filtering if the phase-lack result is the phase-lack of the single distribution transformer, so that the accuracy of the judgment is improved.

3. The method for studying and judging the phase-missing fault based on the public and private transformation data of the power distribution network according to claim 1, wherein the method comprises the following steps: the step (2) is arranged as follows: the minimum threshold value of the phase loss of the medium-voltage distribution transformer is 20 KV; the maximum phase loss threshold value of the medium-voltage distribution transformer is 180 KV; the minimum threshold value of the phase loss of the high-voltage distribution transformer is 380 KV; the maximum phase loss threshold of the high-voltage distribution transformer is 8000 KV.

4. the method for studying and judging the phase-missing fault based on the public and private transformation data of the power distribution network according to claim 1, wherein the method comprises the following steps: and the step (5) comprises reversely deducing a real fault section which takes the tower as a boundary according to the phase-lacking distribution transformer, reversely deducing from the downstream along a power supply path, taking the first tower containing all the phase-lacking distribution transformers as a lower boundary and taking the first tower containing the live distribution transformer as a fault upper boundary, and accurately studying and judging the phase-lacking fault point.

5. A can carry out the distribution automation master station system that lacks looks trouble study and judge, its characterized in that: comprises that

A data analysis module: analyzing a regional distribution transformer data file, and performing matching analysis according to the station number of the distribution transformer to realize monitoring of three-phase voltage data of the distribution transformer, wherein the attributes of the distribution transformer comprise a public transformer and a private transformer;

A threshold setting module: setting different open-phase thresholds according to different voltage class distribution transformers;

a phase-lack judging module: detecting that the voltage of any one phase of the three-phase voltage value of the distribution transformer with the attribute of common transformer and without hanging overhaul, outage, fault and defect is suddenly reduced to be below a set threshold value, and if the voltages of the first three time points of the distribution transformer are all more than 20KV, the distribution transformer is in a phase-failure condition;

Phase-defect review module: calling and testing feeder distribution transformation information according to the feeder information to which the phase-loss distribution transformation belongs, and finding out the distribution transformation under the same phase-loss condition according to calling and testing return information;

A fault positioning module: and judging according to the topology power supply information, finding the common phase-lacking switches and phase-lacking intervals of the distribution transformer, displaying on a human-computer interface, and synchronizing fault information to the GOMS through power failure information issuing.

6. The system of claim 1, wherein the system comprises: the phase-missing judging module can judge whether the phase-missing result is the phase-missing of the single distribution transformer, and if the phase-missing result is the phase-missing of the single distribution transformer, the phase-missing judging module filters the phase-missing result, so that the judging accuracy is improved.

7. the system of claim 1, wherein the system comprises: the fault positioning module can reversely push a real fault section which takes a tower as a boundary according to the distribution transformer of the phase failure, reversely push the real fault section from the downstream along a power supply path, take the tower containing all the phase failure distribution transformers as a lower boundary, take the tower containing the live distribution transformer as a fault upper boundary, and accurately study and judge fault points of the phase failure.

Technical Field

the invention relates to a method for studying and judging a phase-failure fault of a power distribution network.

Background

due to the characteristics of multiple points, long lines and wide area of the distribution network lines, the factors of insufficient climate, geographical environment difference, operation and maintenance management means of the line equipment and the like in different areas, various faults of the distribution network line equipment are easy to occur in the operation process, the operation stability of a power system is influenced, and the damage of power utilization equipment is easy to cause. The 10kV line phase loss accident is one of the most common faults of the power distribution network line, and the damage is that three-phase power users on the fault line cannot work, and fault phase single-phase equipment cannot work, namely, the voltage on the low-voltage side is seriously unbalanced, so that the fault must be eliminated as soon as possible.

At present, the research and judgment of the power distribution network faults at home and abroad are carried out by combining power failure users with topology, and mainly screen power failure and voltage loss users and acquire the power distribution network topology of the power failure and voltage loss users; establishing an analysis distribution set aiming at power failure and voltage loss users, and establishing a total path matrix according to the power distribution network topology; judging the distribution of the analysis distribution set to determine a sub-path matrix searched by the analysis distribution set, and taking the sub-path matrix as a sub-pheromone matrix; carrying out fault search by using an analysis distribution set algorithm, carrying out path search on all elements in the analysis distribution set, and synchronously updating element values of the sub-pheromone matrix; and taking the elements in all the analysis distribution transformation sets as termination conditions, wherein the maximum value of the elements in the sub-pheromone matrix is the power failure fault point. However, since the maximum value of the elements in the sub-pheromone matrix needs to be compatible with all analysis distribution set elements, if there is an analysis distribution set element judgment error, that is, a power failure and voltage loss user screening error, the judged fault point information is also wrong.

the national grid company has issued a technical guideline for researching and judging the failure of distribution network rush-repair command in the form of Q GDW 11626-2016 in 2017-7-31, Chinese patent application CN103901317A discloses a method for researching and judging the failure of distribution network based on multi-system cooperation, Chinese patent application CN108594076A discloses a method for researching and judging the power failure of distribution network, Chinese patent application CN201410158171.7 discloses a method for researching and judging the failure of distribution network and a research and judgment system for the failure of distribution network, and the method and the device in the patents all adopt the power failure alarm information and topology to obtain the maximum intersection point as the failure point, and have certain misjudgment.

Disclosure of Invention

The invention aims to provide a system and a method for researching and judging a phase-lacking fault based on public and special variable data of a power distribution network, which can accurately research and judge a phase-lacking fault point aiming at the defects of the prior art.

The purpose of the invention is realized by the following technical scheme:

A phase-failure fault studying and judging method based on public and private power distribution network variable data is characterized by comprising the following steps: the method comprises the following steps:

(1) Analyzing a regional distribution transformer data file, and performing matching analysis according to the station number of the distribution transformer to realize monitoring of three-phase voltage data of the distribution transformer, wherein the attributes of the distribution transformer comprise a public transformer and a private transformer;

(2) Setting different open-phase thresholds according to different voltage class distribution transformers;

(3) Detecting that the voltage of any one phase of the three-phase voltage value of the distribution transformer with the attribute of common transformer and without hanging overhaul, outage, fault and defect is suddenly reduced to be below a set threshold value, and if the voltages of the first three time points of the distribution transformer are all more than 20KV, the distribution transformer is in a phase-failure condition;

(4) Calling and testing feeder distribution transformation information according to the feeder information to which the phase-loss distribution transformation belongs, and finding out the distribution transformation under the same phase-loss condition according to calling and testing return information;

(5) And judging according to the topology power supply information, finding the common phase-lacking switches and phase-lacking intervals of the distribution transformer, displaying on a human-computer interface, and synchronizing fault information to the GOMS through power failure information issuing.

and (3) judging whether the phase-lack result is the phase-lack of the single distribution transformer, and filtering if the phase-lack result is the phase-lack of the single distribution transformer, so that the accuracy of the judgment is improved.

The step (2) is arranged as follows: the minimum threshold value of the phase loss of the medium-voltage distribution transformer is 20 KV; the maximum phase loss threshold value of the medium-voltage distribution transformer is 180 KV; the minimum threshold value of the phase loss of the high-voltage distribution transformer is 380 KV; the maximum phase loss threshold of the high-voltage distribution transformer is 8000 KV.

and the step (5) comprises reversely deducing a real fault section which takes the tower as a boundary according to the phase-lacking distribution transformer, reversely deducing from the downstream along a power supply path, taking the first tower containing all the phase-lacking distribution transformers as a lower boundary and taking the first tower containing the live distribution transformer as a fault upper boundary, and accurately studying and judging the phase-lacking fault point.

a can carry out the distribution automation master station system that lacks looks trouble study and judge, its characterized in that: comprises that

A data analysis module: analyzing a regional distribution transformer data file, and performing matching analysis according to the station number of the distribution transformer to realize monitoring of three-phase voltage data of the distribution transformer, wherein the attributes of the distribution transformer comprise a public transformer and a private transformer;

a threshold setting module: setting different open-phase thresholds according to different voltage class distribution transformers;

a phase-lack judging module: detecting that the voltage of any one phase of the three-phase voltage value of the distribution transformer with the attribute of common transformer and without hanging overhaul, outage, fault and defect is suddenly reduced to be below a set threshold value, and if the voltages of the first three time points of the distribution transformer are all more than 20KV, the distribution transformer is in a phase-failure condition;

phase-defect review module: calling and testing feeder distribution transformation information according to the feeder information to which the phase-loss distribution transformation belongs, and finding out the distribution transformation under the same phase-loss condition according to calling and testing return information;

A fault positioning module: and judging according to the topology power supply information, finding the common phase-lacking switches and phase-lacking intervals of the distribution transformer, displaying on a human-computer interface, and synchronizing fault information to the GOMS through power failure information release, wherein the common phase-lacking switches refer to the partition switches of the tower.

The phase-missing judging module can judge whether the phase-missing result is the phase-missing of the single distribution transformer, and if the phase-missing result is the phase-missing of the single distribution transformer, the phase-missing judging module filters the phase-missing result, so that the judging accuracy is improved.

The fault positioning module can reversely push a real fault section which takes a tower as a boundary according to the distribution transformer of the phase failure, reversely push the real fault section from the downstream along a power supply path, take the tower containing all the phase failure distribution transformers as a lower boundary, take the tower containing the live distribution transformer as a fault upper boundary, and accurately study and judge fault points of the phase failure.

The invention has the following beneficial effects:

According to the method, the telemetering data of the whole network distribution transformer can be monitored in real time, the distribution transformer phase-loss judgment criterion is optimized, the distribution transformer phase-loss threshold is determined by utilizing a big data analysis technology based on historical phase-loss fault distribution transformer voltage data, in addition, the fault boundary is not judged by using a trip point, the real fault interval taking a tower as the boundary is reversely deduced according to the distribution transformer phase-loss, the reverse deduction is carried out along a power supply path from the downstream, the first tower containing all the phase-loss distribution transformers is the lower boundary, the first tower containing the electrified distribution transformer is the upper boundary of the fault, and the fault point of the phase-loss is accurately researched and judged.

When a phase-missing event is received, data recall and test are carried out on the distribution transformer of the whole feeder line, a specific suspicious line-breaking interval is given out according to the recall and test result and the information of the tower to which the distribution transformer belongs by combining judgment, the line-breaking interval is reduced to the maximum extent, and the fault point is quickly positioned.

In summary, the present application has the following advantages:

1. By the method, the active study and judgment of the phase-loss fault of the power distribution network line are realized, and the phase-loss fault of the line can be sensed and alarmed in time.

2. And due to the flexible configuration of the phase-lack threshold, the phase-lack faults on the line can be effectively monitored to a great extent.

3. The filtering mechanism of the distribution transformer attribute and the listing information and the condition that the research and judgment result is a single distribution transformer are discriminated, and the condition of missing phase research and judgment false alarm can be greatly reduced.

4. practical application shows that the phase-lack fault studying and judging method provided by the application is correct and effective, ensures the accuracy and reliability of phase-lack studying and judging of the power distribution automation master station system, and greatly improves the workload of dispatching personnel in fault handling.

Detailed Description

a power distribution automation master station system capable of conducting open-phase fault study and judgment comprises a data analysis module, a threshold setting module, an open-phase judgment module, an open-phase rechecking module and a fault positioning module which are in communication connection with each other.

The data analysis module analyzes the regional distribution transformer data file, and performs matching analysis according to the station number of the distribution transformer to realize monitoring of the three-phase voltage data of the distribution transformer, wherein the attributes of the distribution transformer comprise a public transformer and a private transformer; the threshold setting module sets different open-phase thresholds according to different voltage class distribution transformers; the phase-defect judging module detects that the voltage of any phase of the three-phase voltage value of the distribution transformer with public transformer attribute and without hanging overhaul, outage, fault and defect suddenly drops below a set threshold value, and the voltages of the first three time points of the distribution transformer are all more than 20KV, so that the distribution transformer has a phase-defect condition; the phase-defect rechecking module calls the information of the feeder distribution transformer according to the information of the feeder to which the phase-defect distribution transformer belongs, and finds out the distribution transformer with the same phase-defect condition according to the returned information of the calling and testing; and the fault positioning module judges according to the topology power supply information, finds the common phase-lack switches and phase-lack intervals of the distribution transformers, displays the common phase-lack switches and the common phase-lack intervals on a human-computer interface, and synchronizes fault information to the GOMS through power failure information release.

A phase-failure fault studying and judging method based on public and private power distribution network variable data comprises the following steps:

1) Analyzing a whole-area distribution transformer data file transmitted to a distribution automation master station system by a provincial company power utilization acquisition system, wherein the data file is an XML format file, and a data analysis module carries out matching analysis according to the station area number of the distribution transformer so as to realize monitoring of data such as three-phase voltage, current, active power, reactive power and the like of the distribution transformer.

2) the threshold setting module sets different open-phase thresholds according to different voltage class distribution transformers, and is beneficial to setting open-phase limit values according to actual conditions on an operation site, wherein the minimum threshold of the open-phase of the medium-voltage distribution transformer is 20 KV; the maximum phase loss threshold value of the medium-voltage distribution transformer is 180 KV; the minimum threshold value of the phase loss of the high-voltage distribution transformer is 380 KV; the maximum phase loss threshold of the high-voltage distribution transformer is 8000 KV.

3) the phase-failure judging module detects that the voltage of any phase of the three-phase voltage value of the distribution transformer with the attribute of common transformer and without hanging overhaul, outage, fault and defect suddenly drops below a set threshold value, and the voltages of the first three time points of the distribution transformer are all greater than 20KV, the distribution transformer generates a phase-failure condition, further judges whether the phase-failure result is the phase-failure of a single distribution transformer, filters the phase-failure result if the phase-failure result is the phase-failure of the single distribution transformer, improves the accuracy of judgment, and supports start-stop configuration for the function of judging whether the phase-failure of the single distribution transformer.

4) And the phase-defect rechecking module calls the information of the feeder distribution transformer according to the information of the feeder to which the phase-defect distribution transformer belongs and the like, and finds out the distribution transformer with the same phase-defect condition according to the returned information of the calling.

5) The fault positioning module judges according to the topology information power supply information to find common phase-lacking switches and phase-lacking intervals of the distribution transformers, and specifically comprises the following steps: according to the real fault interval with the tower as the boundary, the phase-lack distribution transformation is reversely deduced, the reverse deduction is carried out from the downstream along the power supply path, the first tower containing all the phase-lack distribution transformation is the lower boundary, and the first tower containing the live distribution transformation is the upper boundary of the fault, if: the rear area of the front lotus line 138 pole, the front area of the front xing line 8 pole, the rear area of the small Guangshan 12 pole and the front area of the small Guangshan 30 pole have phase loss and influence 18 distribution changes. And displaying on a human-computer interface and synchronizing fault information to the GOMS through power failure information release.

The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents and modifications within the scope of the description.