Application of Distribution Static Compensator (D-STATCOM) to Voltage Sag Mitigation

Abstract

This paper presents a study of a D-STATCOM (Distribution Static Compensator) used for mitigating voltage sag. The basic idea of the voltage sag mitigation, using a D-STATCOM is to dynamically inject a current of desired amplitude, frequency and phase into the grid line. The proposed method extracts the active and reactive parts of the positive-and negative-sequence component for generating reference values of current that need to be injected into the point of connection D-STATCOM in order to compensate the voltage errors. The proposed method offers structural simplicity and less calculation complexity. Simulation results indicate that this method is effective and D-STATCOM has good performance to mitigate the voltage sag.

FACTS Family for Voltage Sag Alleviation: Performance Study and Analysis

“…The insertion of FACTS devices in the power system can help in improving the reliability and increasing the power quality. Different compensation techniques are available, in which the use of FACTS devices is the most effective and economic solution [5]. In this work, the performance study of the FACTS devices for the compensation of voltage imbalance is carried out and the control unit based on the RMS voltage is used to identify the sag disturbances [6].…”