Reactive Power Compensation Control Based on Thyristor Based STATCOM

The thyristor based static synchronous compensator(STATCOM) can absorb continuously adjustable reactive power and is not affected by power system voltage.The authors analyze the mathematical model of thyristor based STATCOM at first;then a pseudo-linear system is constructed by inverse system method and combining with the theory of sliding mode variable structure control the direct reactive power compensation to power load by thyristor based STATCOM is implemented;finally,the computer simulation of the developed control system is performed.Simulation results show that the developed control method possesses better steady-state behavior and dynamic performance and strong adaptive capacity to reactive power variation of load.