Design of PID Controllers in D-STATCOM Based on Adaptive Genetic Algorithm

Aiming at the low accuracy of PID control in D-STATCOM (Distribution Static Synchronous Compensator), the design of Adaptive genetic algorithm-traditional PID controller of D-STATCOM control is studied when voltage swell and voltage sag occur in power grid. The q-axis actual current and reference current waveform, active power and reactive power waveform in D-STATCOM are compared and analyzed. The peak value of the DC side voltage waveform, grid voltage waveform and grid current waveform are effectively suppressed. The tracking error of q-axis reference current to the actual current waveform of D-STATCOM is reduced to 0.12pu. In the case of voltage swell and dip, the power grid is accurately compensated for reactive power and the voltage is stabilized.