摘要
本文针对直驱永磁风力发电系统,提出在直流侧增加多硫化钠-溴液流电池(PSB)储能装置,从而提高风电机组的低电压穿越能力;改进了储能装置结构,研究了采用双向DC/DC变换器的控制策略;对具有储能电池的风力发电系统建立了仿真模型,分析了系统在电压跌落时的动态响应过程和运行特性。仿真结果表明,在直流侧加PSB储能装置,能够平衡电网需求功率,平抑系统发电机输出功率波动,从而提高直驱风电系统并网运行性能和低电压穿越能力,并提高动态响应速度。
To enhance the performance of direct-drive permanent magnet wind power system, low voltage ride through （LVRT） capability of a new type of sodium polysulfide-bromide redox flow battery（PSB） energy storage system （ESS） is added at the DC-side of the converter. The PMSG convertor controller systems were presented. Correspondingly, the ESS and the control strategy of bi-dircctional converter is improved. The simulation model is established, and the dynamic response process and operation characteristics are analyzed. The simulation results show that PBS ESS can balance the demand for power grid when the wind rapidly changes and smooth the fluctuation of generator output power, so that the performances of grid connected operation and LVRT are effectively improved and the dynamic respond speed of system is fast.
出处
《大电机技术》
北大核心
2012年第6期9-13,共5页
Large Electric Machine and Hydraulic Turbine
基金
天津市自然科学基金重点项目(08JCZDJC18600
09JCZDJC23900)
天津市高等学校科技发展基金项目(2006ZD32)
关键词
直驱风电系统
永磁同步发电机
变换器
低电压穿越
多硫化钠
溴液流电池
direct-driven wind power system
permanent magnet synchronous generator
convertor
low voltage ride-through （LVRT）
sodium polysulfide-bromine redox flow battery （PSB）
