电机与控制应用
電機與控製應用
전궤여공제응용
ELECTRIC MACHINES & CONTROL APPLICATION
2015年
7期
34-38
,共5页
双馈风力发电机%电流控制%电磁暂态%低电压穿越
雙饋風力髮電機%電流控製%電磁暫態%低電壓穿越
쌍궤풍력발전궤%전류공제%전자잠태%저전압천월
double-fed wind turbine(DFIG)%current control%transient electromagnetic%low voltage ride through(LVRT)
研究了考虑磁链暂态补偿技术的改进低电压穿越( LVRT)控制策略。在对风机进行有功无功控制的同时，通过对转子电流中的暂态感应分量的检测与控制，实现对定子电压跌落引起的定子磁场变化的补偿，改善了双馈电机的漏感对磁链暂态补偿控制效果的影响。建立了1.5 MW双馈感应发电机并网控制结构的MATLAB模型，并对此进行电磁暂态仿真。仿真结果验证了改进后的方法能够有效抑制双馈电机定、转子电流的峰值，提高双馈型风力发电机的LVRT能力。
研究瞭攷慮磁鏈暫態補償技術的改進低電壓穿越( LVRT)控製策略。在對風機進行有功無功控製的同時，通過對轉子電流中的暫態感應分量的檢測與控製，實現對定子電壓跌落引起的定子磁場變化的補償，改善瞭雙饋電機的漏感對磁鏈暫態補償控製效果的影響。建立瞭1.5 MW雙饋感應髮電機併網控製結構的MATLAB模型，併對此進行電磁暫態倣真。倣真結果驗證瞭改進後的方法能夠有效抑製雙饋電機定、轉子電流的峰值，提高雙饋型風力髮電機的LVRT能力。
연구료고필자련잠태보상기술적개진저전압천월( LVRT)공제책략。재대풍궤진행유공무공공제적동시，통과대전자전류중적잠태감응분량적검측여공제，실현대정자전압질락인기적정자자장변화적보상，개선료쌍궤전궤적루감대자련잠태보상공제효과적영향。건립료1.5 MW쌍궤감응발전궤병망공제결구적MATLAB모형，병대차진행전자잠태방진。방진결과험증료개진후적방법능구유효억제쌍궤전궤정、전자전류적봉치，제고쌍궤형풍력발전궤적LVRT능력。
A strategy considering the flux transient compensation techniques was introdued to improve the DFIG’s low voltage ride through performance during the power grid’s voltage drop. By detecting and controling the transient induction component in the wind turbine rotor current, together with the active and reactive power control, achieved compensation to the the stator magnetic variation caused by the startor voltage drop, and improved the effectiveness of leakage inductance to the transient flux compensation. A control prototype of 1. 5 MW DFIG was built in MATLAB. Its electromagnetic transient process and safeness was simulated and discussed. Simulation results verified the effectiveness on restraining the peak current of stator and rotor and enhancing the DFIG’s LVRT capability.
