Enhanced Control and Operation of Doubly-Fed Induction Generator Based Wind Farm during Network Unbalance
Lead Research Organisation:
Queen's University of Belfast
Department Name: Sch of Electronics, Elec Eng & Comp Sci
Abstract
This proposal intends to study the system control and the operation of wind farms based on Doubly-Fed Induction Generators (DFIG), connected to either a transmission system or embedded within a distribution system, when the network voltage is unbalanced. The unbalanced voltage can either be a large transient unbalance caused by asymmetric AC faults or a small steady-state unbalance. The project will first develop a mathematical model which includes a DFIG and two back-to-back connected converters under unbalanced supply. The impact of unbalanced network voltage on the operation of the DFIG and the associated converters will be examined. This project will further explore strategies that can be employed by the DFIG under unbalanced network voltage for providing enhanced operation such as improving the system operation and recovery during and after asymmetric fault, maintaining a balanced stator current, minimising DFIG electric torque pulsation or making a contribution to the rebalancing of the network voltage. Methods for controlling DFIG systems during network voltage unbalance, by providing precise control of the stator/rotor current and if required, the asymmetric active and reactive power outputs, will then be investigated. Experimental tests will be carried out to validate the proposed control strategy.
People |
ORCID iD |
Lie Xu (Principal Investigator) |
Publications

Hu J
(2009)
Improved Control of DFIG Systems During Network Unbalance Using PI-R Current Regulators
in IEEE Transactions on Industrial Electronics

Lie Xu
(2008)
Coordinated Control of DFIG's Rotor and Grid Side Converters During Network Unbalance
in IEEE Transactions on Power Electronics

Wang Y
(2009)
Compensation of network voltage unbalance using doubly fed induction generator-based wind farms
in IET Renewable Power Generation

Xu L
(2007)
Dynamic Modeling and Control of DFIG-Based Wind Turbines Under Unbalanced Network Conditions
in IEEE Transactions on Power Systems

Xu L
(2008)
Enhanced Control and Operation of DFIG-Based Wind Farms During Network Unbalance
in IEEE Transactions on Energy Conversion
Related Projects
Project Reference | Relationship | Related To | Start | End | Award Value |
---|---|---|---|---|---|
EP/D029775/1 | 31/03/2006 | 30/08/2007 | £127,081 | ||
EP/D029775/2 | Transfer | EP/D029775/1 | 31/08/2007 | 29/09/2008 | £0 |