电测与仪表
電測與儀錶
전측여의표
ELECTRICAL MEASUREMENT & INSTRUMENTATION
2013年
3期
20-23
,共4页
风力发电%永磁同步发电机(PMSG)%低电压穿越(LVRT)%不对称跌落
風力髮電%永磁同步髮電機(PMSG)%低電壓穿越(LVRT)%不對稱跌落
풍력발전%영자동보발전궤(PMSG)%저전압천월(LVRT)%불대칭질락
wind power generation%PMSG%LVRT%asymmetrical faults
针对永磁风电系统,为提高其不对称故障下的低电压穿越能力,提出把网侧变流器输出的有功功率信号引入发电机侧来限制发电机的输出功率,降低直流侧过电压的控制策略;在网侧变流器增加负序电压前馈以实现不对称故障下并网电流的三相对称,并根据电网电压的跌落深度迅速发出无功功率,提升网侧电压.基于MATLAB/Simulink搭建了仿真平台,仿真结果表明该控制策略的有效性.
針對永磁風電繫統,為提高其不對稱故障下的低電壓穿越能力,提齣把網側變流器輸齣的有功功率信號引入髮電機側來限製髮電機的輸齣功率,降低直流側過電壓的控製策略;在網側變流器增加負序電壓前饋以實現不對稱故障下併網電流的三相對稱,併根據電網電壓的跌落深度迅速髮齣無功功率,提升網側電壓.基于MATLAB/Simulink搭建瞭倣真平檯,倣真結果錶明該控製策略的有效性.
침대영자풍전계통,위제고기불대칭고장하적저전압천월능력,제출파망측변류기수출적유공공솔신호인입발전궤측래한제발전궤적수출공솔,강저직류측과전압적공제책략;재망측변류기증가부서전압전궤이실현불대칭고장하병망전류적삼상대칭,병근거전망전압적질락심도신속발출무공공솔,제승망측전압.기우MATLAB/Simulink탑건료방진평태,방진결과표명해공제책략적유효성.
The control strategies for generator -side converter and grid -side converter for the permanent magnet direct-driven wind power generation system are analyzed. The active power of grid-side converter is introduced to generator in order to limit the electromagnetic power of the generator and decrease the DC-link over-voltage. The grid-side converter exports reactive power rapidly to increase the grid-side voltage. Simulations are carried out using MATLAB/Simulink 7.10 and the simulation results verify the effectiveness and feasibility of the proposed control strategies.