水电与新能源
水電與新能源
수전여신능원
HYDROPOWER AND NEW ENERGY
2015年
3期
72-78
,共7页
双馈感应风力发电机%鼠笼感应风力发电机%静止无功补偿器%暂态性能
雙饋感應風力髮電機%鼠籠感應風力髮電機%靜止無功補償器%暫態性能
쌍궤감응풍력발전궤%서롱감응풍력발전궤%정지무공보상기%잠태성능
double fed induction generator%squirrel cage induction generator%static synchronous compensator%transi-ent performance
分析比较了双馈感应风力发电机( DFIG)与鼠笼感应风力发电机( SCIG)两种机型,利用Simulink对DFIG ,SCIG在电压骤降时暂态运行特性进行仿真。结果表明SCIG在电压骤降时的影响主要是输入输出功率不匹配造成转子转速的剧增,而DFIG是因变化器耐流耐压不高,容易因低电压造成的转子过电流而损坏,在控制策略失效时crowbar装置把双馈风力发电机变为鼠笼风力发电机运行。 DFIG可通过自身变化器提供无功功率可在一定范围内维持电压稳定,运行较比SCIG稳定。介绍静止无功补偿器( STATCOM),通过STATCOM来稳定端口电压,仿真表明静止同步器可以明显提高风力发电机组的暂态性能。
分析比較瞭雙饋感應風力髮電機( DFIG)與鼠籠感應風力髮電機( SCIG)兩種機型,利用Simulink對DFIG ,SCIG在電壓驟降時暫態運行特性進行倣真。結果錶明SCIG在電壓驟降時的影響主要是輸入輸齣功率不匹配造成轉子轉速的劇增,而DFIG是因變化器耐流耐壓不高,容易因低電壓造成的轉子過電流而損壞,在控製策略失效時crowbar裝置把雙饋風力髮電機變為鼠籠風力髮電機運行。 DFIG可通過自身變化器提供無功功率可在一定範圍內維持電壓穩定,運行較比SCIG穩定。介紹靜止無功補償器( STATCOM),通過STATCOM來穩定耑口電壓,倣真錶明靜止同步器可以明顯提高風力髮電機組的暫態性能。
분석비교료쌍궤감응풍력발전궤( DFIG)여서롱감응풍력발전궤( SCIG)량충궤형,이용Simulink대DFIG ,SCIG재전압취강시잠태운행특성진행방진。결과표명SCIG재전압취강시적영향주요시수입수출공솔불필배조성전자전속적극증,이DFIG시인변화기내류내압불고,용역인저전압조성적전자과전류이손배,재공제책략실효시crowbar장치파쌍궤풍력발전궤변위서롱풍력발전궤운행。 DFIG가통과자신변화기제공무공공솔가재일정범위내유지전압은정,운행교비SCIG은정。개소정지무공보상기( STATCOM),통과STATCOM래은정단구전압,방진표명정지동보기가이명현제고풍력발전궤조적잠태성능。
The transient responses of the double fed induction generator ( DFIG) and the squirrel cage induction genera-tor ( SCIG) during a voltage sag are simulated by Simulink toolbox.Results show that the voltage sag will cause a rapid increase of the rotor speed for SCIG because of the incompatibility of the input and output power.While for DFIG, the o-ver current in the rotor induced by the voltage sag could damage the variator.In case of a control policy failure, the DFIG will be turned into a SCIG by the crowbar device.However, the DFIG can provide reactive power by the variator to keep a stable voltage within a certain range, so that a more stable operation can be obtained than the SCIG.In the last, the static synchronous compensator ( STATCOM) is introduced to maintain a stable port voltage, which dramatical-ly improves the transient performance of the wind power generator unit.