Abstract

The application of renewable energy has a significant impact on the stability of power systems. This article jointly uses static synchronous compensator (STATCOM), additional power oscillation damping (POD) controller and power system stabilizers (PSSs) to improve the stability of power systems in transmission network. An enhanced intelligent optimization algorithm is utilized to optimize the controller parameters. The proposed algorithm introduces the idea of combined genetic algorithm (GA) and particle swarm algorithm (PSO) to overcome the local convergence problem of the PSO. The voltage control and damping control of STATCOM are comprehensively considered in the objective function to suppress low-frequency power oscillation (LFO) while ensuring the effectiveness of voltage control. Numerical results from the IEEE 4 machine 2 area system and the IEEE 16-machine five-areas system demonstrate the effectiveness of the proposed method and the superiority on restraining the LFO of the wind-PV-thermal-bundled (WPTB) system.

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