Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Active low-voltage power distribution network fault positioning optimization method based on hierarchical model

A low-voltage distribution network and fault location technology, which is applied in the direction of fault location, fault detection according to conductor type, and electrical measurement, can solve the problems of low fault location efficiency and many equivalent source-containing areas, so as to improve the operation management level, Optimize the hierarchical model and avoid the effect of interference

Inactive Publication Date: 2020-05-08
STATE GRID ZHEJIANG ELECTRIC POWER CO LTD QUZHOU POWER SUPPLY CO +1
View PDF6 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly solves the original technical problems of many equivalent source-containing areas and low fault location efficiency, and provides a layered model-based fault location optimization method for active low-voltage distribution networks. By optimizing the weight coefficients of key nodes, it provides The stability and accuracy of the positioning algorithm. At the same time, according to the access situation of distributed power sources in the actual low-voltage distribution network, the fault information reporting threshold is designed to reduce the number of distributed power sources in the model, optimize the layered model, and improve positioning efficiency and Accuracy, improve the operation and management level of the power supply department

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Active low-voltage power distribution network fault positioning optimization method based on hierarchical model
  • Active low-voltage power distribution network fault positioning optimization method based on hierarchical model
  • Active low-voltage power distribution network fault positioning optimization method based on hierarchical model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0034] Embodiment: A layered model-based fault location optimization method for an active low-voltage distribution network in this embodiment includes the following steps:

[0035] (1) Make the distribution network equivalent in layers. According to the topological structure of the distribution network, all the sections of the feeder are reserved, the branches of each feeder are equivalent to a section, and the reporting threshold of the fault current information is set to be greater than 12%I.

[0036] The basis for the elimination of distributed power is related to the access location and capacity of distributed power. When distributed power is connected to the bus side, the low-voltage distribution network can be equivalent to a single-ended radial power supply network, and distributed power is connected upstream. The main power supply supplies power to the low-voltage distribution network at the same time, which can be regarded as a traditional single power supply radiatio...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an active low-voltage power distribution network fault positioning optimization method based on a hierarchical model. The active low-voltage power distribution network fault positioning optimization method comprises the following steps of: performing hierarchical equivalence on a power distribution network; setting a plurality of monitoring nodes and reporting monitoring information; encoding a fault state of a fault current information monitoring section reported by means of the monitoring nodes; constructing a monitoring node switching function of the power distribution network by utilizing a monitoring node switching state information matrix and a section state information matrix; introducing a decision-making variable Di of information distortion to form a faulthypothesis vector; and introducing a section state Si and a distortion factor into the design of the decision-making variable to design a target function. According to the active low-voltage power distribution network fault positioning optimization method, a weight coefficient of a key node is optimized, stability and precision of a positioning algorithm are provided, a fault information reporting threshold value is designed according to access conditions of distributed power supplies of an actual low-voltage power distribution network, the number of the distributed power supplies in the model is reduced, the hierarchical model is optimized, positioning efficiency and precision are improved, and the operation management level of a power supply department is improved.

Description

technical field [0001] The invention relates to the field of power grid fault processing, in particular to a layered model-based fault location optimization method for an active low-voltage power distribution network. Background technique [0002] With the rapid development of new energy technologies, a large number of small-capacity distributed photovoltaics are connected to the low-voltage distribution network, which also brings interference to the fault location of the low-voltage distribution network. In the fault location research of active low-voltage distribution network, due to the complex conditions such as short lines of low-voltage distribution network, many branches, many nodes, small capacity and large number of distributed power sources, the direction of fault current is different, and the traditional fault The location method is difficult to accurately locate the fault section, and the calculation process is too complicated due to the large number of nodes. C...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/086G01R31/088
Inventor 徐凤乾吴臻苏毅方巫水萍郑志祥冯洋乐健徐雷文吕慧珍梁路方坚胡谦
Owner STATE GRID ZHEJIANG ELECTRIC POWER CO LTD QUZHOU POWER SUPPLY CO
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products