电气技术
電氣技術
전기기술
ELECTRICAL ENGINEERING
2012年
12期
1-1,2-4
,共4页
双馈风电系统%低电压穿越%网侧变流器%STATCOM
雙饋風電繫統%低電壓穿越%網側變流器%STATCOM
쌍궤풍전계통%저전압천월%망측변류기%STATCOM
wind power system based on DFIG%low voltage ride through%grid-side converter%STATCOM
电网要求风电场/风电机组具有低电压穿越能力,其中包括风电场在电网故障期间应该提供无功支持,但是双馈风机转子侧变流器（RSC）为了实现自我保护会触发Crowbar而被旁路,失去对风机的功率控制。针对这个问题,建立了风机网侧变流器（GSC）的数学模型,分析了STATCOM的基本原理;提出一种无功支持策略,即电网电压跌落期间STATCOM与风机网侧变流器共同向电网提供无功功率,支持电网电压恢复。基于Matlab/Simulink平台进行仿真验证,结果表明,该无功支持策略能有效支持电网电压恢复,提高双馈风电系统的低电压穿越能力。
電網要求風電場/風電機組具有低電壓穿越能力,其中包括風電場在電網故障期間應該提供無功支持,但是雙饋風機轉子側變流器（RSC）為瞭實現自我保護會觸髮Crowbar而被徬路,失去對風機的功率控製。針對這箇問題,建立瞭風機網側變流器（GSC）的數學模型,分析瞭STATCOM的基本原理;提齣一種無功支持策略,即電網電壓跌落期間STATCOM與風機網側變流器共同嚮電網提供無功功率,支持電網電壓恢複。基于Matlab/Simulink平檯進行倣真驗證,結果錶明,該無功支持策略能有效支持電網電壓恢複,提高雙饋風電繫統的低電壓穿越能力。
전망요구풍전장/풍전궤조구유저전압천월능력,기중포괄풍전장재전망고장기간응해제공무공지지,단시쌍궤풍궤전자측변류기（RSC）위료실현자아보호회촉발Crowbar이피방로,실거대풍궤적공솔공제。침대저개문제,건립료풍궤망측변류기（GSC）적수학모형,분석료STATCOM적기본원리;제출일충무공지지책략,즉전망전압질락기간STATCOM여풍궤망측변류기공동향전망제공무공공솔,지지전망전압회복。기우Matlab/Simulink평태진행방진험증,결과표명,해무공지지책략능유효지지전망전압회복,제고쌍궤풍전계통적저전압천월능력。
Grid requires that wind farm or wind turbine should have low voltage ride-through capability, which includes that wind farm should provide reactive power support during grid fault. However, in order to achieve self-protection of the rotor-side converter of DFIG, Crowbar will be triggered, which leads to lose the ability to control power. For this issue, a mathematical model of grid-side converter (GSC) is established and the basic principle of STATCOM is analyzed, then a reactive power support strategy is proposed in this paper. The power support strategy means that both STATCOM and the grid-side converter provide reactive support to the grid during grid voltage dips and support grid voltage recovery. Simulation analysis is achieved in the Matlab/Simulink. Simulation results show that the reactive support strategy can effectively support grid voltage recovery and improve the low voltage ride through capability of wind power system based on DFIG.
