Impacts of SVG Location and Capacity on Voltage Recovery Characteristics in Hunan Network

Abstract

The dynamic voltage stability, which often occurs in the load center, is a key factor that restricts the economic operation of power systems and threatens the development and safe operation of power systems. Comparing to the power electronic devices, traditional reactive power compensations such as synchronous condenser, low-voltage capacitor and reactance have less technical and economic advantages and hard to support systems rapid development. Therefore, it is of great significance to study the application of new dynamic reactive power compensation technology, namely static var generator (SVG), in practical power systems. Developing distributed SVGs for grid dynamic voltage support is of great technical and economic value. Therefore, this paper takes Hunan network as an example to investigate the effect of SVGs location and capacity on transient voltage recovery characteristics. Time-domain simulation results are carried out from the PSASP. From the simulation cases, it is shown that the case with distributed SVGs has a better effect on the voltage recovery than the centralized SVG. However, the simulation results also show that different SVG capacity, location and the load level will lead to different optimal configuration of distributed SVG. A further research is needed in the following future.