A substation suppression bus voltage fluctuation device and voltage fluctuation suppression method

Abstract

The invention discloses a device for suppressing voltage fluctuation of a bus in a transformer substation and a voltage fluctuation suppression method. The bus comprises a 110KV bus and a 10KV bus which are based on two power supplies, wherein the two power supplies are two power supply lines, namely a first main transformer and a second main transformer, in a 220KV transformer substation; a line at each of the upper end and the lower end of the first main transformer is connected in series with a switch, and a line at each of the upper end and the lower end of the second main transformer is connected in series with a switch; the V1 section of the 10KV bus is connected with a first capacitor switch which is equipped with a secondary automatic device capable of being automatically reset; the 10KV bus is connected in series with a voltage taking resistor, and the two ends of the voltage taking resistor are respectively connected with voltage transformers capable of detecting that the I section of the 10KV bus has voltage; the voltage transformers are connected with the secondary automatic device on the first capacitor switch; sets of backup automatic switch equipment which are matched with corresponding switches to realize operation are respectively arranged on the 110KV bus and the 10KV bus.

Description

technical field [0001] The invention relates to a substation suppression bus voltage fluctuation device and a voltage fluctuation suppression method, which belong to the technical field of power grid safety protection. Background technique [0002] In the prior art, 110kV or 35kV substations are powered by dual power sources. If a 110kV or 35kV line is [0003] In the event of a power failure, the 110kV standby automatic switching operation will be activated, and the switch of another 110kV or 35kV line will be closed to maintain the continuous power supply of the substation. The capacitor running on the power supply will trip due to the loss of voltage protection action. After the power transmission is resumed, it will not be automatically switched on, which will affect the 10kV bus voltage and cause it to fluctuate. Contents of the invention [0004] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a bus voltage fluctuat...

AI Technical Summary

Problems solved by technology

[0003] In the event of a power failure, the 110kV standby automatic switching operation will be activated, and the switch of another 110kV or 35kV line will be closed to maintain the continuous power supply of the substation. The capacitor running on the power supply will trip due to the loss of voltage protection action. After the power transmission is resumed, it will not be automatically switched on, which will affect the 10kV bus voltage and cause it to fluctuate.

Images