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Spare automatic adaptive switching method for transformer substation based on automatic reclosing information

A technology of reclosing information and standby self-switching, which is applied in the direction of electrical components, circuit devices, emergency power supply arrangements, etc., can solve problems such as influence, failure to consider safety devices, unfavorable power supply reliability, etc., and achieve good economy and engineering , Strong engineering applicability

Inactive Publication Date: 2012-07-11
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the main power supply is lost due to the operation of the security system and the terminal station is far away, the line backup automatic switch is not allowed to operate; but when the main power supply is lost due to other reasons, the line backup automatic switch should be able to operate correctly (Li Yonghao. Lines adapted to the security system The application of backup and automatic switching in 110kV substation [J]. Electrotechnical Technology, 2008, (12))
Similarly, the 10kV segmental standby automatic switching, so the control strategy of switching on and off must also consider the influence of the grid security automatic device
[0003] At present, the 10kV standby automatic switching device does not consider the constraints of the safety and self-connection device, and lacks a perfect self-adaptive switch-on and withdrawal strategy. In order to give full play to the role of the safety and self-switching device, the power grid operation department withdraws part of the 10kV backup and automatic switching from operation, which has caused serious damage to the reliability of power supply. negative effect

Method used

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  • Spare automatic adaptive switching method for transformer substation based on automatic reclosing information
  • Spare automatic adaptive switching method for transformer substation based on automatic reclosing information
  • Spare automatic adaptive switching method for transformer substation based on automatic reclosing information

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Embodiment Construction

[0024] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings and examples, but the implementation and protection of the present invention are not limited thereto.

[0025] figure 1 It is a typical 110kV substation three-female four-section main wiring diagram. During normal operation, incoming line 1, incoming line 2, and incoming line 3 are powered by different 110kV lines, and circuit breakers 1DL, 2DL, 6DL, and 7DL are in the closed position. Circuit breakers 3DL, 8DL are in open position.

[0026] The present invention needs to collect following power grid operation data (both take FBZTA (segmentation standby self-injection) as example):

[0027] 1. Input the analog quantity as shown in Table 1.

[0028] Table 1

[0029] Analog

the symbol

I mother three-phase voltage

u a1 , U b1 , U c1

II mother A three-phase voltage

u a2 , U b2 , U c2

1# ma...

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Abstract

The invention provides a spare automatic adaptive switching method for a transformer substation based on automatic reclosing information. A 110kV spare automatic switching logic matched with a superior safe automatic device is formed by combining a main 110kV transformer substation connection mode of unit connection, comprehensively analyzing various constraint conditions for 10kV spare automatic switching, adopting in-place information and using the reclosing process of a 110kV line and trip of a step-down switch as criteria, so that the switching rate of 10kV spare automatic switching equipment can be improved, and the method plays an important role in improving the power supply reliability of a power grid. Switching of a sectional spare automatic switching adaptive superior safe device is realized by considering the conditions such as the main connection mode, line fault electrical features, transformer faults and the like.

Description

technical field [0001] The invention relates to the technical field of controlling the actions of self-adaptive upper-level safety devices for substation equipment automatic switching, in particular to a substation automatic switching self-adaptive switching and withdrawing method based on reclosing information. Background technique [0002] As a large number of safety automatic devices in the power grid are put into use, in order to ensure the safety and stability of the large power grid, especially in the event of emergency power grid accidents, the load removed by the safety automatic The load controlled by the automatic device must be effectively cut off when needed, and the power supply shall not be switched on without authorization. The load cut off by remote control of the safety and self-control system device must have the locking function of remote control if the equipment self-injection device is to be installed; the load cut off by local control must have the loca...

Claims

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Application Information

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IPC IPC(8): H02J9/06
Inventor 蔡泽祥刘文泽竹之涵苏忠阳
Owner SOUTH CHINA UNIV OF TECH
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