A Live Overhauling Method for a Voltage Regulating Device of a DC System

Abstract

The invention discloses a live-line overhaul method of a direct-current system voltage regulation device. The method includes the steps of inspecting working conditions of the direct-current system voltage regulation device, switching automatic control to manual control, unlocking a silicon-chain monitoring terminal, conducting a live-line overhaul, and the like. The method has the advantages that through a live-line short circuit of a voltage regulation silicon chain, the live-line overhaul of a direct-current system is achieved, an breakpoint of a protective measuring and control device is not needed, all protective functions are intact, an breakpoint of a circuit-breaker operation loop is not needed, an operation-mechanism opening-closing loop is normal, it is unnecessary to verify other in-station types of information signals, signal conversion information reported by a monitoring background is true and credible, normal power supplying of the direct-current system is ensured, the overhaul of the voltage regulation device can be conducted without a halt, the efficiency of the overhaul is effectively improved, and potential safety hazards caused by the halt during the overhaul are avoided.

Description

technical field [0001] The invention belongs to the field of electrical technology, and in particular relates to a live overhaul method for a DC system voltage regulating device. Background technique [0002] DL / T5044-2004 Power Engineering DC System Design Technical Regulations requires 110kV and above substations to be equipped with a minimum configuration of dual-power and double-charge DC screen systems, and most power grids below 110kV use single-power single-charge and dual-power single-charge DC screen systems for power supply. The DC control bus provides a continuous DC power supply with a small load, while the closing bus provides a large instantaneous power supply. When closing, the current is large, which will cause a short-term drop in the bus voltage. In a frequently operated substation, if silicon Chain voltage regulation type DC power supply system, the silicon chain has been subjected to load changes for a long time, which will cause breakdown of the monomers...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a live maintenance method for a voltage regulating device of a DC system, so as to solve the problems in the prior art that the voltage regulating control device needs to be shut down for maintenance, which affects the power supply work of the DC system, low maintenance efficiency and potential safety hazards