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A Checking Method of Relay Protection Fixed Value

A relay protection and verification technology, applied in the electric power field, can solve problems such as inaccurate relay protection calculation results, influence on the safe and stable operation of the power grid, and influence on the action of protection devices, so as to ensure safe and stable operation, real-time verification, Accurately reflect the effect

Active Publication Date: 2011-12-21
EAST CHINA GRID +1
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Problems solved by technology

When the operation mode of the system changes, the setting parameters of the power grid will change accordingly. At this time, the offline check cannot accurately reflect the characteristics of the power grid, resulting in inaccurate calculation results of the relay protection setting, thus affecting the action of the protection device The situation will also have a certain impact on the safe and stable operation of the entire power grid.

Method used

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  • A Checking Method of Relay Protection Fixed Value
  • A Checking Method of Relay Protection Fixed Value

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Embodiment Construction

[0007] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0008] This method of checking the relay protection fixed value obtains the real-time data of EMS (Energy Manage System, energy management system), maintenance information system, and fault information system, and calculates the position of the protection switch under each simulated fault state according to the real-time operation mode. On this basis, the sensitivity and selectivity of the protection are checked in real time.

[0009] Preferably, after the check is completed, the check result is output, and the fixed value adjustment suggestion is given for the relay protection fixed value that does not meet the predetermined value; and the data exchange of the check result with the EMS system is performed for real-time decision-making by the dispatching operator Provide protection operation information, and give diffe...

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Abstract

The invention provides a method for checking relay protection setting, which can be utilized to realize the real-time monitoring and exact reflection of power grid characters, ensure the correct calculation result of the relay protection setting and the safe and stable running of a whole power grid, and reflect the actual load currents to the check process of the protection setting. In the method, real-time data of an EMS (energy management system), an overhaul information system and a failure information system are acquired, and a real-time running mode is utilized to calculate a current value and branch coefficients at a protection switch in each analog failure state, thus the flexibility and selectivity of the protection is checked in real time.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method for checking the fixed value of relay protection. Background technique [0002] With the rapid development of my country's power system, the requirements for system relay protection are getting higher and higher. The traditional setting calculation is restricted by the operation mode of the power grid system. It can only check the current set operation mode offline. Considering the round inspection in the conventional sense to simulate the current value and current value under various fault points and fault types. branching factor. When the operation mode of the system changes, the setting parameters of the power grid will change accordingly. At this time, the offline check cannot accurately reflect the characteristics of the power grid, resulting in inaccurate calculation results of the relay protection setting, thus affecting the action of the protection devic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26
Inventor 陈建民倪腊琴胡宏韩学军邱智勇刘中平桂强章耀耀刘虎林仇向东孙杰王利强
Owner EAST CHINA GRID
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