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Relay protection entire network optimal constant value automatic adjusting and coordinating method

An automatic setting and relay protection technology, applied in the field of electric power, can solve the problems of not being able to know the coordination status intuitively and quickly, long working cycle, and low working efficiency, so as to reduce the probability of missetting accidents, shorten the setting time, and improve work efficiency. Effects on efficiency and quality of work

Active Publication Date: 2010-10-20
北京中恒博瑞数字电力科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the wiring mode, operation mode, and electrical component data of the power grid change, it is impossible to know the coordination status of the original fixed value intuitively and quickly
It is necessary for the setting personnel to recalculate the setting value, and determine whether to modify the original setting value according to the new setting value and the original setting value. This setting method has low work efficiency and a relatively long working cycle, and is prone to mis-setting, malfunction of protection devices, etc. accidents, and it is not easy to find the optimal setting solution that minimizes the need to modify the setting of the entire power system

Method used

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  • Relay protection entire network optimal constant value automatic adjusting and coordinating method
  • Relay protection entire network optimal constant value automatic adjusting and coordinating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In this example, the specific implementation process using a computer includes the following contents in sequence:

[0020] 1. First of all, according to the local power grid structure, equipment parameters, operation mode and setting principles, use the computer to calculate the new setting range of all protections.

[0021] Aiming at the difficulties encountered in the automatic unlocking problem in the setting calculation and protection coordination of the large-scale ring network at present, this system combines the actual experience in the setting calculation, from the perspective of reducing load shedding, and uses the following three principles as the automatic setting of the ring network in one ring. The principle of unlocking that the same section of protection cooperates with each other to form an endless loop: A. The opposite side switch of the main power plant; B. The opposite side branch switch of the high-voltage substation; C. The opposite side switch of t...

Embodiment 2

[0029] The difference from Example 1 is that the modification of the setting scheme in step 4 of this example is done manually, that is, after the completion of step 3, the check result is displayed, manual intervention is added, and the setting principles and / or settings of some branches are reset. Or enter the fifth step after setting the coefficient.

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Abstract

The invention relates to a relay protection entire network optimal constant value automatic adjusting and coordinating method. The method takes electric network structure, equipment parameters and operational mode as initial conditions, all the protected new constant value intervals are calculated according the relay protection adjusting rule; automatic check is carried out on the calculated new constant value according to the adjusting rule and the original constant value; the checked new constant value is stored into a database; and meanwhile adjusting scheme is modified and new constant value calculation is returned, then automatic check is carried out on the calculated new constant value, and the checked new constant value is stored into the database, thus a plurality of times of circulations are carried out and multiple adjusting schemes are stored in an automatic checking database; then intelligent comparison algorithm is adopted, and the optimal constant value solution is selected from the multiple adjusting schemes; and all the adjusting constant values required to be modified are determined according to the solution. The invention utilizes a computer to carry out automatic check, adjusting and comparison, picks out the optimal constant value solution, can greatly improve work efficiency and job content, shortens adjusting time and reduces probability of error adjusting accident.

Description

technical field [0001] The invention belongs to the technical field of electric power, and in particular relates to a method for automatically setting and cooperating with an optimal setting value in the whole network for relay protection of a power grid. Background technique [0002] The relay protection device is an integral part of the power system and guarantees the safe operation of the power system. It is very important to rationally configure and use the relay protection device correctly. When calculating the setting value of the relay protection of the power grid, there are many factors that need to be considered, among which the wiring mode and operation mode of the power grid have the greatest influence on the setting value calculation. With the development of the power grid, the scale of the power grid is getting larger and larger, and the wiring mode and operation mode are becoming more and more complicated. Among them, large rings and small rings are nested wit...

Claims

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Application Information

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IPC IPC(8): H02H7/28
Inventor 仇向东王新花张军葛爱茹张海顺
Owner 北京中恒博瑞数字电力科技有限公司
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