Realization Method of Sectional Backup and Automatic Switching Adapting to Changes of Operation Mode of 10kV Busbar

Abstract

The present invention proposes a method for implementing subsection backup automatic switching adapting to changes in the operation mode of 10kV busbars, and solves the problem that the existing subsection backup automatic switching does not meet the requirements of single busbar, single section two-section busbar and one of the busbars is the main busbar in the mode of double branch incoming line. The problem that any branch of the variable variable low can realize the function of segmental standby self-switching, including: S1. Collect the bus connection mode to determine the main transformer in operation; S2. Collect relevant electrical and switching parameters; S3. Judgment of the segment Whether the charging of the standby automatic switching is completed, if so, execute S4; otherwise, do not process; S4. Determine whether the segmented standby automatic switching action condition is met, if so, after the start-up delay setting time, jump off the voltage-loss bus corresponding to the main transformer and become low switch, execute S5, otherwise, the segmental standby automatic switching does not act; S5. Determine whether the main transformer low switch corresponding to the voltage-loss bus is in the position within the delay setting time, if so, the segmental switch closing delay is set After the value time, the section switch is closed, and the action is successful; otherwise, the section backup self-injection power is turned on, and the section backup auto-injection action fails.

Description

technical field [0001] The invention relates to the technical field of self-adaptive switching of 10kV bus segmental standby automatic switching, and more specifically relates to a method for realizing segmental standby automatic switching adapting to changes in the operation mode of 10kV busbars. Background technique [0002] The backup power automatic switch-on device (hereinafter referred to as the standby automatic switch-on device) is the key equipment to improve the reliability of power supply in the power system. The normal operating voltage of the busbar ensures reliable power supply for users. [0003] As a substation 10kV bus that collects, distributes and directly transmits electric energy to the power supply load, it is generally used such as figure 1 The typical design of the wiring mode of "single busbar, double section and four section busbar" is shown. The existing 10kV subsection backup automatic switch-on device has the function of four section busbars bei...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that when the wiring mode of the 10kV bus is changed to a single bus, single section, two sections of bus, and one section of the bus is double-branch incoming line wiring, the existing 10kV section backup auto-input technology cannot meet the requirements of the double-branch main transformer. The branch operation can realize the function of segmental standby automatic switchover, and the existing segmental standby automatic switchover technology has the defect of complex control logic. The present invention proposes a segmented backup automatic switchover realization method that adapts to the change of 10kV bus operation mode. Overcome the above defects and ensure the power supply reliability of the 10kV distribution network

Images