Coordination of PSS and STATCOM-POD to Improve Low-Frequency Oscillation Characteristics of Wind-Thermal-Bundled Transmission System Using Improved Salp Swarm Algorithm

An approach is proposed in this paper to coordinate the power system stabilizer and static synchronous compensator with additional power oscillation damping controller (STATCOM-POD) in the wind-thermal-bundled (WTB) transmission system. An improved salp swarm algorithm is proposed. Adaptive weight factor, Levy flight disturbance strategy, non-uniform Gaussian mutation operator and greedy selection strategy are introduced to improve the leader and follower position update formula in the salp swarm algorithm (SSA). This algorithm improves the ability of SSA to avoid falling into the local optimum and can be used to coordinate and optimize controller parameters. Considering the controller's role in controlling the system voltage and damping, an objective function is built to improve the low-frequency oscillation characteristics of the WTB transmission system by comprehensively evaluating the real part and damping ratio of low-frequency oscillation mode and bus voltage. The eigenvalue analysis and time domain simulation are used to verify the effectiveness of the proposed coordination method.