MODELLING AND CONTROL OF STATCOM TO ENSURE STABLE POWER SYSTEM OPERATION

In this paper, two control methods namely adaptive voltage control method and d-q axis control method are proposed to ensure proper operation of static synchronous compensator (STATCOM) to provide an efficient and effective means of controlling power system stability. In the aforementioned control methods PI controller has been used to regulate the constant DC-link voltage in the DC link capacitor as well reactive power, grid voltage and current. The simulations are conducted in MATLAB/SIMULINK platform. The performance of the STATCOM are investigated both for normal state and disturbances (line fault) of the power system network. The obtained results ensure that the STATCOM with the mentioned controller has performed well to maintain power system stability by controlling both bus voltages and reactive power in the power system network.