摘要
风电机组低电压穿越(LVRT)能力的深度对机组造价影响很大,根据实际系统对风电机组进行合理的LVRT能力设计很有必要。对变速风电机组LVRT原理进行了理论分析,对多种实现方案进行了比较。在电力系统仿真分析软件DIgSILENT/PowerFactory中建立双馈变速风电机组及LVRT功能模型。以地区电网为例,详细分析系统故障对风电机组机端电压的影响,依据不同的风电场接入方案计算风电机组LVRT能力的电压限值,对风电机组进行合理的LVRT能力设计。结果表明,风电机组LVRT能力的深度主要由系统接线和风电场接入方案决定。设计风电机组LVRT能力时,机组运行曲线的电压限值应根据具体接入方案进行分析计算。
The request for low voltage ride through （LVRT） characteristic can change the cost of wind turbine generator （WTG）. It is necessary to design the capability of LVRT in reason. The model and the control strategy of DFIG with LVRT are implemented in the power system simulation tool DIgSILENT/Power Factory. The system simulation is implemented in a regional grid. A method is presented to confirm the special requirement of LVRT of wind turbine generators in the project. The voltage at the wind turbine terminal is calculated during the faults in power systems. The voltage limit of LVRT is presented in terms of different integration schemes. The results suggest that the LVRT capability is confirmed by the connection of Power Systems and wind farm integration schemes. The voltage limit of LVRT should be confirmed in terms of special integration scheme.
出处
《电工技术学报》
EI
CSCD
北大核心
2007年第10期173-177,共5页
Transactions of China Electrotechnical Society
关键词
风电机组
低电压穿越
接入方案
Wind turbine generator, low voltage ride through, integration scheme
