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In this paper, a detailed analysis of the current advanced PID control design is given. It consists of dynamic feedforward, setpoint modification and fuzzy logic. The fuzzy logic feedforward can be treated as one kind of nonlinear control. Simulations are performed based on models obtained using real power plant step test data. The performance of each design is accessed based on the area regulation test criterion currently adopted by PJM Interconnection LLC. In general, well-tuned advanced PID control design can give an AR test score of more than 90 with pressure fluctuations less than 3%. This design has been used as a benchmark for comparison studies against other MIMO control designs.

The SVPWM technique plays an important role in the DC-AC transform. The modeling and simulation for SVPWM were proposed in this paper. The sector calculating model and basic vector working time model were set up. The effective vector function of time was set up. The triangle wave symmetry modulation was established too. The simulation results show that the model proposed in this paper is effective and has application value.