CN203398773U - Distribution network fault detection and isolation control system - Google Patents

Distribution network fault detection and isolation control system Download PDF

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Publication number
CN203398773U
CN203398773U CN201320409024.3U CN201320409024U CN203398773U CN 203398773 U CN203398773 U CN 203398773U CN 201320409024 U CN201320409024 U CN 201320409024U CN 203398773 U CN203398773 U CN 203398773U
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distribution network
acquisition module
zero
fault
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徐骏
秦卫东
詹植振
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State Grid Corp of China SGCC
Zhuhai XJ Electric Co Ltd
Zhuhai Xujizhi Power System Automation Co Ltd
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State Grid Corp of China SGCC
Zhuhai XJ Electric Co Ltd
Zhuhai Xujizhi Power System Automation Co Ltd
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Abstract

本实用新型公开了一种配网故障检测隔离控制系统,包括分合闸开关、电压检测模块、零序电压采集模块、故障电流采集模块以及控制器。本实用新型于每个配网区段所设置的零序电压采集模块对区段内的零序电压进行检测,当存在超过限值的零序电压时,表明该区段存在单相接地的情况,控制器可以基于此零序电压数据准确地对该区段的分合闸开关进行分闸,从而实现单相接地故障区段的隔离;本实用新型进一步引入故障电流为判据,当配网区段没有检测到故障电流时,可以确定该区段没有发生故障,变电站重合闸时不需要经过合闸延时确认,直接控制开关合闸,以减少非故障区段的停电时间。

Figure 201320409024

The utility model discloses a distribution network fault detection and isolation control system, which comprises an opening and closing switch, a voltage detection module, a zero-sequence voltage acquisition module, a fault current acquisition module and a controller. The utility model is equipped with a zero-sequence voltage acquisition module in each distribution network section to detect the zero-sequence voltage in the section, and when there is a zero-sequence voltage exceeding the limit value, it indicates that there is a single-phase grounding situation in the section , the controller can accurately open and close the switch of the section based on the zero-sequence voltage data, so as to realize the isolation of the single-phase ground fault section; the utility model further introduces the fault current as a criterion, when the distribution network When no fault current is detected in the section, it can be determined that there is no fault in the section. When the substation recloses, it does not need to go through the closing delay confirmation, and directly controls the switch to close, so as to reduce the power outage time of the non-faulty section.

Figure 201320409024

Description

配网故障检测隔离控制系统Distribution Network Fault Detection and Isolation Control System

技术领域 technical field

本实用新型涉及配电网技术,尤其涉及馈线自动化故障隔离技术。 The utility model relates to distribution network technology, in particular to a feeder automation fault isolation technology.

背景技术 Background technique

现有的配网故障检测方法一般都是以电压为故障判据。三相电压中的某相出现异常时判断为配网发生故障,此时变电站跳闸,变电站重合闸后终端逐级经过延时合闸,当变电扎再次跳闸时,可判断该配网区段为故障区段。上述方案对于发生单相接地故障的区段不能实现故障隔离;对于没有发生故障的区段,变电站二次重合闸时需要经过延时合闸,增大非故障区段的停电时间。因此现有技术存在保护盲区和增大非故障区段停电时间的问题。 Existing distribution network fault detection methods generally use voltage as the fault criterion. When a certain phase of the three-phase voltage is abnormal, it is judged that the distribution network is faulty. At this time, the substation trips. After the substation is reclosed, the terminals are closed step by step after a delay. When the substation trips again, the distribution network section can be judged. for the faulty section. The above scheme cannot achieve fault isolation for the section with a single-phase ground fault; for the section without a fault, the secondary reclosing of the substation needs to be closed with a delay to increase the power outage time of the non-faulty section. Therefore, the prior art has the problems of protecting the blind zone and increasing the power failure time of the non-fault zone.

发明内容 Contents of the invention

针对上述问题,本实用新型提供一种能实现单相接地故障隔离功能、有效减少非故障区段停电时间的配网故障检测隔离控制系统。 In view of the above problems, the utility model provides a distribution network fault detection and isolation control system that can realize the single-phase ground fault isolation function and effectively reduce the power failure time of the non-fault section.

本实用新型为解决其技术问题所采用的技术方案是: The technical scheme that the utility model adopts for solving its technical problem is:

配网故障检测隔离控制系统,包括:设置在每个配网区段用于控制该配网区段分合闸的分合闸开关;设置在每个配网区段中用于检测三相电压大小的电压检测模块;设置在每个配网区段中用于采集零序电压数据的零序电压采集模块;设置在每个配网区段中用于采集故障电流数据的故障电流采集模块;以及,用于控制分合闸开关动作的控制器,电压检测模块、零序电压采集模块、故障电流采集模块的输出端与控制器连接,分合闸开关的控制端与控制器连接。 Distribution network fault detection and isolation control system, including: an opening and closing switch set in each distribution network section to control the opening and closing of the distribution network section; set in each distribution network section to detect three-phase voltage A voltage detection module of different size; a zero-sequence voltage acquisition module for collecting zero-sequence voltage data in each distribution network section; a fault current acquisition module for collecting fault current data in each distribution network section; And, for the controller used to control the action of the opening and closing switch, the output terminals of the voltage detection module, the zero-sequence voltage acquisition module and the fault current acquisition module are connected to the controller, and the control terminal of the opening and closing switch is connected to the controller.

所述零序电压采集模块为具有零序电压检测功能的电压变压器或电子式电压传感器。 The zero-sequence voltage acquisition module is a voltage transformer or an electronic voltage sensor with a zero-sequence voltage detection function.

本实用新型的有益效果是:本实用新型于每个配网区段所设置的零序电压采集模块对区段内的零序电压进行检测,当存在超过限值的零序电压时,表明该区段存在单相接地的情况,控制器可以基于此零序电压数据准确地对该区段的分合闸开关进行分闸,从而实现单相接地故障区段的隔离;本实用新型进一步引入故障电流为判据,当配网区段没有检测到故障电流时,可以确定该区段没有发生故障,变电站重合闸时不需要经过合闸延时确认,直接控制开关合闸,以减少非故障区段的停电时间。  The beneficial effects of the utility model are: the zero-sequence voltage acquisition module installed in each distribution network section of the utility model detects the zero-sequence voltage in the section, and when there is a zero-sequence voltage exceeding the limit value, it indicates that the If there is a single-phase ground fault in the section, the controller can accurately open the on-off switch of the section based on the zero-sequence voltage data, thereby realizing the isolation of the single-phase ground fault section; the utility model further introduces fault The current is the criterion. When no fault current is detected in the distribution network section, it can be determined that there is no fault in the section. When the substation recloses, it does not need to go through the closing delay confirmation, and directly controls the switch to close to reduce the non-faulty area. period of power outage. the

附图说明 Description of drawings

下面结合附图和具体实施方式进行进一步的说明: Further explanation is carried out below in conjunction with accompanying drawing and specific embodiment:

图1为本实用新型的系统组成示意图。 Fig. 1 is a schematic diagram of the system composition of the present utility model.

具体实施方式 Detailed ways

本实用新型的配网故障检测隔离控制系统用于对配网中的不同区段的分合闸情况进行控制,实现故障隔离。 The distribution network fault detection and isolation control system of the utility model is used to control the opening and closing conditions of different sections in the distribution network to realize fault isolation.

如图1所示,控制系统包括设置在每个配网网区段用于控制该配网区段分合闸的分合闸开关1、设置在每个配网区段中用于检测三相电压大小的电压检测模块2、设置在每个配网区段中用于采集零序电压数据的零序电压采集模块3、设置在每个配网区段中用于采集故障电流数据的故障电流采集模块4以及,用于控制分合闸开关动作的控制器5。电压检测模块2、零序电压采集模块3、故障电流采集模块4的输出端与控制器5连接,分合闸开关1的控制端与控制器5连接。上述电压检测模块2、零序电压采集模块3、故障电流采集模块4以及分合闸开关1一般设置于单个配电终端内,以整体结构的方式存在。该配电终端可以通过不同的通讯方式与控制器5实现数据的交互。本实用新型中的零序电压采集模块3优选采用具有零序电压检测功能的电压变压器SPS或电子式电压传感器EVT实现。 As shown in Figure 1, the control system includes an opening and closing switch 1 arranged in each distribution network section for controlling the opening and closing of the distribution network section, and an opening and closing switch 1 arranged in each distribution network section for detecting three-phase Voltage detection module for voltage size 2. Zero-sequence voltage acquisition module for collecting zero-sequence voltage data in each distribution network section 3. Fault current for collecting fault current data in each distribution network section The acquisition module 4 and the controller 5 for controlling the action of the opening and closing switches. The output ends of the voltage detection module 2 , the zero-sequence voltage acquisition module 3 , and the fault current acquisition module 4 are connected to the controller 5 , and the control end of the opening and closing switch 1 is connected to the controller 5 . The above-mentioned voltage detection module 2 , zero-sequence voltage acquisition module 3 , fault current acquisition module 4 and opening and closing switch 1 are generally arranged in a single power distribution terminal and exist as an integral structure. The power distribution terminal can realize data interaction with the controller 5 through different communication methods. The zero-sequence voltage acquisition module 3 in the utility model is preferably implemented by a voltage transformer SPS or an electronic voltage sensor EVT with a zero-sequence voltage detection function.

本实用新型的工作原理如下:配网区段中的分合闸开关处于合闸状态时,零序电压采集模块检测到大于预设值大小的零序电压后,控制器控制该配网区段的分合闸开关分闸,实现该配网区段的隔离;配网区段中的分合闸开关处于合闸状态时,故障电流采集模块没有检测到故障电流,配网二次重合闸时对于该配网区段的分合闸开关不需要经过延时确认,直接控制其分合闸开关合闸,以减少非故障区段的停电时间。 The working principle of the utility model is as follows: when the opening and closing switch in the distribution network section is in the closing state, after the zero-sequence voltage acquisition module detects a zero-sequence voltage greater than the preset value, the controller controls the distribution network section The opening and closing switch of the distribution network is opened to realize the isolation of the distribution network section; when the opening and closing switch in the distribution network section is in the closing state, the fault current acquisition module does not detect the fault current, and when the distribution network is reclosed for the second time The opening and closing switch of the distribution network section does not need to be confirmed by delay, and the opening and closing switch of the distribution network section is directly controlled to close, so as to reduce the power failure time of the non-fault section.

本实用新型的实施方式并不受上述实施例的限制,只要其以基本相同的手段达到本实用新型的技术效果,都应属于本实用新型的保护范围。 The implementation of the utility model is not limited by the above-mentioned examples, as long as it achieves the technical effect of the utility model by basically the same means, it should belong to the protection scope of the utility model.

Claims (2)

1. Distribution Network Failure detects isolation control system, it is characterized in that comprising:
Be arranged on each distribution section for controlling the on-off switch of this distribution section divide-shut brake;
Be arranged in each distribution section the voltage detection module for detection of three-phase voltage size;
Be arranged in each distribution section for gathering the residual voltage acquisition module of residual voltage data;
Be arranged in each distribution section for gathering the fault current acquisition module of fault current data; And,
For controlling the controller of on-off switch action, the output of voltage detection module, residual voltage acquisition module, fault current acquisition module is connected with controller, and the control end of on-off switch is connected with controller.
2. Distribution Network Failure according to claim 1 detects isolation control system, it is characterized in that described residual voltage acquisition module is voltage transformer or the electronic voltage transducer with zero sequence voltage detection function.
CN201320409024.3U 2013-07-10 2013-07-10 Distribution network fault detection and isolation control system Expired - Fee Related CN203398773U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108628215A (en) * 2018-05-19 2018-10-09 安徽国电京润电力科技有限公司 A kind of Distribution Network Failure detection isolation automatic control system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108628215A (en) * 2018-05-19 2018-10-09 安徽国电京润电力科技有限公司 A kind of Distribution Network Failure detection isolation automatic control system

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