Reactive Power Coordination During Emergency DC Power Support

Abstract

AbstractEmergency DC power support can enhance the stability of a power system when one DC link is blocked. The lack of reactive power will cause the supporting DC link to be unable to reach its own set point, thus reducing the effect of emergency DC power support. Three methods were proposed to provide reactive power in this chapter. They are switching the filter of the blocked dc link step by step, installing SVC, and improving additional excitation control of the generators that are near the rectifier station. The result shows that the above three methods can increase the emergency DC power. The reserved filters can only affect the dc links which are near the blocked dc link and may cause overvoltage to the converter station of the blocked dc link; SVC and excitation control can reduce the number of the tripped generators. However, the excitation control shows better performance and also the overvoltage of the generators can be controlled within a reasonable range.KeywordsReactive PowerRectal ConditionsConverter StationOvervoltageUHVDC TransmissionThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.