Low-Voltage Ride-Through Operation of Permanent Magnet Synchronous Generator with Active and Reactive Power Injection

Abstract

This paper presents the design and implementation of a grid-connected permanent magnet synchronous generator wind power system with low-voltage ride-through. A control system regulates the constant dc-link voltage and provides the maximum power transfer to the grid by controlling unity power factor. The active power is regulated to reduce the current excess, and the reactive power is injected into the grid to avoid the inverter damage under grid faults. A dc-link voltage controller maintains a constant dc voltage during faults. The proposed control system is experimentally validated for the normal and faulty conditions on a grid-connected wind power system. Experimental results demonstrate the effectiveness and robustness of the proposed system regarding voltage and power control.