Title :
Unified DC-Link Current Control for Low-Voltage Ride-Through in Current-Source-Converter-Based Wind Energy Conversion Systems
Author :
Dai, Jingya ; Xu, Dewei David ; Bin Wu ; Zargari, Navid R.
Author_Institution :
Dept. of Electr. & Comput. Eng., Ryerson Univ., Toronto, ON, Canada
Abstract :
The increased penetration of wind power into utility grid brings challenges to power converter design in wind energy conversion systems (WECSs). Among all, low-voltage ride-through has been enforced in the field, which is one of the major challenges for WECS. It is necessary to design an integrated controller to protect the converter from overvoltage/overcurrent and to support the grid voltage during faults and recoveries. In this paper, a unified dc-link current control scheme for current-source-converter-based WECS is proposed. The controllers for generator- and grid-side converters are coordinated to provide fault ride-through capability. In normal operations, the proposed control scheme can also smooth the real power flow while keeping the fast dynamic performance of the dc-link current control. Simulation and experimental results are provided to verify the proposed control scheme.
Keywords :
constant current sources; control system synthesis; electric current control; load flow; overvoltage; power convertors; power generation control; power generation faults; power grids; wind power; wind power plants; DC-link current control; WECS; current-source-converter-based wind energy conversion system; generator-side converter; grid voltage; grid-side converter; integrated controller design; low-voltage ride-through; overcurrent; overvoltage; power converter design; real power flow; utility grid; wind power penetration; Current source converter (CSC); low-voltage ride-through; wind energy conversion system (WECS);
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2010.2059377
