Optimal coordinated control of PSS and STATCOM in a multimachine power system

Abstract

To improve power system stability in this paper, a method for optimal coordinate control of power system stabilizers (PSSs) and static synchronous compensator (STATCOM) is presented. The optimal coordinated control of multiple PSSs and STATCOM is transformed into an optimization problem in which both rotor angle speed deviation between generators and load voltages deviation after fault are involved. The optimal control parameters of PSS and STATCOM controllers are obtained by employing a paired-bacteria optimizer (PBO) based algorithm. The proposed method is tested on the Western System Coordinating Council (WSCC) 3-generator 9-bus power system. To verify the effectiveness of the proposed method, PSSs and STATCOM optimized in coordinated manner are compared with PSSs optimized independently and no damping controllers. The simulation results have shown that the coordinated PSS and STATCOM controllers optimized by PBO perform efficiently in damping low-frequency oscillations and improving the load bus voltage stability.

Artificial Bee Colony Algorithm Based Approach for Power System Oscillation Damping with PSS and STATCOM

“…Due to restriction of local measurements, these controllers based on local signals tend to be difficult to offer satisfactory performance under various system operating conditions. With the rapid advancement in wide area measurement systems technology, fast communication networks and powerful information technology, the widely dispersed signals of power systems can be centralized, processed and distributed even in real time, which makes the wide area signal a good alternative for control input [19].…”