Treatment and Analysis of Frequent Drop of 220 kV Bus Voltage

As an important part of relay protection, substation bus voltage is the focus of daily operation and maintenance inspection, maintenance and transformation. Firstly, the causes, hazards and detection methods of abnormal bus voltage are described. Then, the problem of frequent drop of 220 kV bus voltage is analyzed and processed, and the preventive measures are provided, which provides a reference for the operation and maintenance personnel to quickly and accurately locate and deal with similar defects.