摘要
深入分析了电网电压不平衡跌落下双馈风电机组的基础理论,在此基础上推导出基于动态制动电阻(DBR)双馈风电机组在电网不平衡故障下的数学模型和低电压穿越(LVRT)控制条件,同时得到影响LVRT的关键控制参数的数学表达式。最后,通过实验验证了理论推导的正确性。
The unbalanced grid voltage sag conditions theory of doubly-ted wind power generator is deeply analyzed. On the basis of the theory, the mathematical models of the equivalent circuit of doubly-fed wind power generator sys- tem and the control mode of low voltage ride through （LVRT） of doubly-fed wind power generator based on dynamic brake resistance（DBR） and the function which is the parameters of the important influence on LVRT are presented.Fi- nally, the experimental waveforms verify the correctness of the theoretical analysis.
出处
《电力电子技术》
CSCD
北大核心
2014年第1期15-17,共3页
Power Electronics
关键词
风电机组
动态制动电阻
不平衡故障
低电压穿越
wind power generator
dynamic brake resistance
unbalanced faults
low voltage ride through
