Static Reactive Power Compensation Unit Protection

Abstract

The Static VAR Compensator provides reactive power and voltage support to the transmission system by switching local SVC capacitors and controlled reactor. The SVCs are needed the most during network disturbances. At these occasions they may make the difference between a network collapse and successful continued operation, The basic task of the SVC fault clearance system is to detect a specified class of power system faults and abnormalities and to disconnect the associated item of plant from the rest of the power system, The fault clearance system shall perform with high reliability, speed, selectivity and sensitivity. This thesis will focus on the control based over/under-current and thermal overload protection for the SVC and also on the relay-based protection included in the SVC installation will also be discussed. The simulation will focus on applying different types of faults which may accrue in LOCALMARKET SVC substation and how they can be detected and cleared by the protection system of the SVC. The analysis is carried out using MATLAB SIMULINK software.