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Method for determining grade of single-bus trip-out loss of load accident in double-bus connection mode

A technology of wiring mode and judging method, which is applied to AC network circuits, electrical components, circuit devices, etc., can solve problems such as tripping, substation load loss, and load shedding of stability control devices, and achieves clear calculation process, convenient operation, and structural simple effect

Active Publication Date: 2018-03-02
GUIZHOU POWER GRID CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

After a single busbar fault trips in a double-busbar connection substation, it will not only cause the load loss of the substation, but also cause the connected line to trip, resulting in a change in the grid structure, which may cause a voltage loss in the substation and a cut-off of the stabilizing device after the line flow exceeds the limit. load
Therefore, the judgment and analysis of the accident level is relatively complicated.

Method used

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  • Method for determining grade of single-bus trip-out loss of load accident in double-bus connection mode
  • Method for determining grade of single-bus trip-out loss of load accident in double-bus connection mode

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Embodiment Construction

[0030] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the protection scope of the present invention.

[0031] Such as figure 1 As shown, the method for judging the accident level of a single busbar tripping and losing load in the double busbar connection mode of the present invention includes the following steps:

[0032] Step 1: Basic data statistics: The basic data required for statistics includes four aspects of data including the connection relationship of the power grid, the basic parameters of network calculation, the load of each substation, and the action strategy of the stability control device;

[0033] The above-mentioned data sources are as follows: three types of data such as grid connection relationship, network calculation basic parameters, and load of each substation ...

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Abstract

The invention discloses a method for determining the grade of a single-bus trip-out loss of load accident in a double-bus connection mode. The method identifies the voltage loss of a transformer station caused by the trip-out through network analysis, and measures the shedding load of a stability control device caused by the trip-out by power flow analysis, and determines and analyzes the grade ofa loss of load accident in combination of the results in the two previous aspects. The method is clear in calculation process, simple in structure, convenient to operate, and good in practicality, and can provide reference and basis for scheduling operation risk assessment. According to the inventive idea, the present invention also provides a system for determining the grade of a single-bus trip-out loss of load accident in a double-bus connection mode.

Description

Technical field [0001] The present invention relates to the field of power system dispatching operation, and in particular to a method for determining the accident level of a single busbar tripping and loss of load in a double busbar connection mode, which is used to determine the accident level caused by the loss of load after a single busbar tripping in a double busbar connection mode substation. Background technique [0002] Loss load is an important basis for determining the accident level of Order 599. The basic principle is to determine the accident level according to the proportion of the loss load to the total load of the area where the accident occurred. [0003] At present, double busbar wiring is the most common wiring method in my country's substations. Most of the 220kV, 110kV voltage level substations and some 550kV voltage level substations in China use this wiring method. Single-bus fault tripping of substations with double-bus connection mode is a key content in th...

Claims

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Application Information

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IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 赵翔宇安成叶航超姚刚杜江胡吟安甦
Owner GUIZHOU POWER GRID CO LTD
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