Design And Implementation Of Power System Stabilizer Based On FPGA

With the rapid development of China's power grid scale,and in the environment of greatly improving the capacity of new energy generation,the stability of power system has become a prominent problem of power system control.Power system low-frequency oscillation is a typical disturbance to power system stability.Among many countermeasures to suppress low-frequency oscillation in primary and secondary systems,power system stabilizer(PSS)is the most commonly used and one of the better control strategies.In recent years,many advanced algorithms have been introduced into PSS design.Among them,predictive control(MPC)has been widely used in PSS design because of its outstanding advantages such as on-line rolling optimization,feedback correction and model prediction.Because the particle swarm optimization(PSO)does not need the analytical form in the optimization,so this thesis applies PSO and predictive control to the rolling optimization of predictive control.The particle swarm optimization algorithm based on w,c linkage control improves the global search ability and avoids the premature of particle swarm.In this thesis,several typical w,c linkage control strategies are simulated and analyzed,and a PSO-APPC algorithm is proposed by combining a relatively excellent strategy with nonlinear predictive control.At present,the literature about the performance of PSO-MPC control algorithm is rare.In this thesis,the relationship between parameters and performance of PSO-APPC algorithm is studied and discussed in depth.In addition,the PSO-APPC algorithm is compared with the other two algorithms(PSO-NPC,PSO-SPC),and the simulation results show that the performance of this algorithm is better than the other two algorithms.In this thesis,the PSO-APPC algorithm proposed in this thesis is applied to the design of PSS based on the model of single machine infinite bus system.The PSS based on this algorithm is simulated in the case of single-phase short circuit to ground and 10% sudden increase of mechanical power in the power system,and the PSS based on this algorithm is compared with the other two PSS after the system is disturbed the effectiveness of PSS in this thesis proves that the control effect of PSS in this thesis is better than the other two.Finally,the algorithm PSO-APPC proposed in this thesis is implemented by FPGA technology to form a control chip,which can be used as the core control chip of power system stabilizer,which solves the contradiction between the requirement of quick response of power system and the large amount of computation of advanced control algorithm.The software simulation under Quartus II environment and the hardware board level verification of FPGA development board have verified its effectiveness and feasibility.