DC-link Voltage Control of Voltage Source Converter by Using PI Controller with Anti-windup

The electric machines of various electric drives and wind power systems are commonly connected to the main grid via a voltage source converter, which is combined by two back-to-back converters at the machine side and grid side with dc-link in the middle. The dc-link voltage is controlled via the grid side converter. The paper introduces the investigation results in the selection of structure and parameters of proportional integral (PI) regulator with anti-windup for the control of DC voltage of voltage source converter. The analysis and development of the control diagram are implemented in the case that the converter is connected to the grid via an LCL filter. Simulation and experiment results provide excellent responses that confirm the performance of the proposed regulator