Layout method of overhaul safety measures for double-bus and double-section power supply system of substation

Abstract

The invention discloses a layout method of overhaul safety measures for a double-bus and double-section power supply system of a substation. The method comprises the following steps: 11) loop closingand inverting the bus bar; 12) switching that low-voltage alternating current pow supply; 13) switching each switch cabinet of that bus bar to be overhauled to a hot standby state; 14) switching eachswitch cabinet to a cold standby state; 15) switching that voltage transformer to a cold standby state; 16) switching that station transformer to a cold standby state; 17) Installing the ground wire;18) disconnecting that direct current power supply screen to remove the direct current control power circuit breaker and the closing power circuit breaker of the bus bar to be overhaul; 19) Disconnecting the low-voltage alternating current screen and go to the low-voltage alternating current circuit breakers of each switch cabinet of the bus bar to be inspected and repaired. The method for arranging maintenance safety measures of the power supply system has the advantages of fast and efficient switching operation, complete arrangement of maintenance safety measures, and can effectively avoid the occurrence of switching misoperation and personal injury accidents, and ensure the safety of equipment maintenance operation.

Description

technical field [0001] The invention relates to the technical field of substation power supply, in particular to a method for arranging maintenance safety measures for a substation double-busbar double-section power supply system. Background technique [0002] figure 1 A schematic diagram of the primary system principle of a substation dual-bus dual-section power supply system in the prior art is provided as an example. as attached figure 1 As shown, the substation double-bus dual-section power supply system has four bus sections I, II, III and IV. When the substation is in normal power supply operation, the 1# main transformer is connected to the I-section busbar and each feeder line through the 3501 circuit breaker, and the 2# The main transformer is connected to section II busbar and each feeder line through 3502 circuit breaker, 3# main transformer is connected to section III busbar and each output line through 3503 circuit breaker, and 4# main transformer is connected...

AI Technical Summary

Problems solved by technology

[0003] The substation needs to carry out electrical cleaning and maintenance on the substation and distribution equipment in spring and autumn every year. Due to the complex system structure of the existing substation dual-busbar dual-segment power supply system, during equipment maintenance, the switching operation volume is large, and the operation safety risk is high. The layout of safety measures is complicated, and there are many places where power transmission is reversed or where power may come in. Misoperation is prone to occur, endangering the safety of maintenance personnel, and even causing personal injury accidents

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