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Intelligent power-distribution-network whole-line quick-reacting main protection and determination system and method

An intelligent distribution network, fast-acting technology across the board, applied in information technology support systems, emergency protection circuit devices, electrical components, etc., to improve reliability, meet access requirements, and achieve rapid isolation.

Active Publication Date: 2013-10-16
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a system and method for discriminating the full-line fast-moving main protection of an intelligent distribution network to solve the problem that the existing system must ensure that the calculated sampling times of the electrical quantities at each end are consistent

Method used

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  • Intelligent power-distribution-network whole-line quick-reacting main protection and determination system and method
  • Intelligent power-distribution-network whole-line quick-reacting main protection and determination system and method
  • Intelligent power-distribution-network whole-line quick-reacting main protection and determination system and method

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Embodiment Construction

[0034] Such as figure 1 As shown, the full-line fast-moving main protection discrimination system of the smart distribution network includes a distribution network terminal and a distribution network master station, and the distribution network terminal and the distribution network master station are connected through fiber channel communication.

[0035] The distribution network terminal is an intelligent terminal configured at each circuit breaker in the distribution network. The equipment is installed at each circuit breaker in the distribution network. Network and terminal EPON optical communication network connection.

[0036] The distribution network terminal equipment adds a fault start element, a logic discrimination and control module of the comprehensive direction element to the original distribution network terminal (FTU, DTU, TTU). The distribution network terminal includes an acquisition module, a logic discrimination and control module and a communication module;...

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Abstract

The present invention relates to an intelligent power-distribution-network whole-line quick-reacting main protection and determination system and method. The method comprises the steps of: collecting local voltage and current information by a distribution-network terminal; determining whether a failure has happened by a failure start element, and if not, going to the end, and else if the failure has happened, going on to determine whether a comprehensive direction element is operated; uploading operation information of the failure start element, operation information of the comprehensive direction element, and phasor information of voltage and current from the distribution-network terminal to a distribution-network main station through a fiber optical channel; and carrying out accurate failure section positioning by the distribution-network main station according to the information unloaded by the distribution-network terminals in combination with the topological structure of the distribution network. According to the invention, the transmission of the power-distribution-network data is realized by the fiber optical channel, the whole-line quick-reacting main protection function is achieved by using nonsynchronous data collection of an intelligent terminal collection unit, and the control of circuit breakers adjacent to the failure section is performed by remote control commands, so that the reliability of the power supply of the distribution network is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of relay protection automation in electric power engineering, and relates to a system and method for discriminating quick-acting main protection of the whole line of an intelligent distribution network. Background technique [0002] The power system is a system that converts primary energy into electrical energy, which is composed of equipment and technologies such as power generation, power transformation, power transmission, power distribution, and power consumption. my country's distribution network refers to the power grid composed of equipment and lines with a voltage level of 35kV and below. Distribution automation is the use of modern electronic technology, communication technology, computer and network technology to integrate online and offline data, distribution network data and user data, power grid structure and geographic graphics to form a complete automation system. Realize the automation of p...

Claims

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Application Information

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IPC IPC(8): H02H7/26H02J13/00
CPCY04S10/20Y02E60/725Y02E60/00
Inventor 雷振锋杨恢宏桓保军余高旺王若醒唐云龙路进升刘桂莲江新峰王留送孔波利
Owner STATE GRID CORP OF CHINA
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