Method for retrofitting substation DC power supply system without power outage

Abstract

The invention discloses a method for retrofitting a substation DC power supply system without power outage, comprising the steps of: S100, connecting a temporary DC power supply system; S200, stoppingthe operation of the existing DC power supply system in the substation; and S300, connecting a new DC power supply system and removing the temporary DC power supply system. When the substation DC power supply system is retrofitted, a temporary power supply is connected to supply power and to realize retrofitting without power outage when the operation of primary and secondary equipment is not affected. The temporary DC power supply system is used as the temporary power supply, and a DC battery pack and a silicon rectifying device operate in parallel so as to eliminate the harmonics of the silicon rectification to improve the output voltage stability of the DC system. The method does not change a system power supply mode and achieves orderly and controllable safe management.

Description

technical field [0001] The invention relates to the field of power transmission, in particular to a method for retrofitting a DC power supply system of a substation without power failure. Background technique [0002] With the rapid development of electric power in our country and the rapid update of equipment, the DC power system equipment of existing business line substations and power distribution stations has reached the age of renewal and transformation, and the DC power supply systems of substations and power distribution stations are guaranteed relay protection devices. , The stable power supply of the mechanism box. [0003] At present, the transformation of the DC power supply system in the substation and distribution station: the protection system of the substation and distribution station is taken out of operation, and the power supply of the whole station is cut off; the power supply mode of the power system will be changed by using this method, and the power sup...

AI Technical Summary

Problems solved by technology

[0003] At present, the transformation of the DC power supply system in the substation and distribution station: the protection system of the substation and distribution station is taken out of operation, and the power supply of the whole station is cut off; the power supply mode of the power system will be changed by using this method, and the power supply within the power supply range of the station will be changed. The impact on electrical equipment is very large; the procedures related to power outages are complicated and the cycle time is long

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