Design of PI parameters based on analytical method for CSC-PMSG-WGS

Focusing on the design of PI parameters for the controller in a permanent magnet synchronous generator wind generation system (PMSG-WGS), some effective achievements have been obtained. However, these methods have some issues such as low accuracy caused by approximate calculation and low generality caused by complex control algorithm. The low accuracy results in low performance, therefore much more efforts will be needed to regulate the designed PI parameters to acquire the optimal performances for the controller of PMSG-WGS with different specifications. To solve this problem, some complex algorithms are introduced into design. This results in low generality that extra efforts will need to adjust specifications in algorithms when design PI parameters for different power scales system. Therefore, a method of comprehensive consideration of reliability and simplicity is necessary. In addition, most of the methods are for the PMSG-WGS based on Voltage Source Converters (VSCs) while a few for systems based on Current Source Converters (CSCs). To design proper PI parameters effectively for the controller of PMSG-WGS based on Current Source Converter (CSC-PMSG-WGS) with different power scales, a general method based on the analytical formulas is proposed in this paper. These formulas are derived from the system stability criterion and used to calculate the PI parameters directly. The feasibility and effectiveness of the proposed method are verified by detail theoretical analysis and simulation results in MATLAB/Simulink.