CAJ | 학술논문

直驱式风力发电系统%功率控制%双三相永磁同步发电机%矢量空间解耦%无位置传感器矢量控制%模型参考自适应系统%波波夫超稳定理论%转子初始位置直驅式風力髮電繫統%功率控製%雙三相永磁同步髮電機%矢量空間解耦%無位置傳感器矢量控製%模型參攷自適應繫統%波波伕超穩定理論%轉子初始位置
직구식풍력발전계통%공솔공제%쌍삼상영자동보발전궤%시량공간해우%무위치전감기시량공제%모형삼고자괄응계통%파파부초은정이론%전자초시위치
direct-drive wind power generation system%power control%dual-three phase permanent magnet synchronous generator%vector space decomposition%position sensorless vector control%model reference adaptive system%Popov super stability theory%rotor initial positi

为满足低压大功率输出的要求,直驱式风力发电系统采用双三相永磁同步发电机和变流器并联技术相结合的拓扑结构.针对位置传感器故障率高、易受干扰等问题,在风力发电机功率控制的基础上提出一种双三相永磁同步发电机无位置传感器矢量控制算法.根据矢量空间解耦原理建立双三相永磁同步发电机的数学模型.利用模型参考自适应系统估计发电机转速,依据波波夫超稳定理论推导出自适应律,分析发电机参数变化对速度估计的影响.通过对电机定子直流励磁获得转子初始位置.仿真和实验结果表明该算法能实现风力发电机可靠起动,有很好的速度跟踪性能和稳态精确度,使发电机能在额定风速下最大限度获取风能,并能稳定运行于恒速和恒功率区域,且对发电机参数变化不敏感,算法计算量小.
위만족저압대공솔수출적요구,직구식풍력발전계통채용쌍삼상영자동보발전궤화변류기병련기술상결합적탁복결구.침대위치전감기고장솔고、역수간우등문제,재풍력발전궤공솔공제적기출상제출일충쌍삼상영자동보발전궤무위치전감기시량공제산법.근거시량공간해우원리건립쌍삼상영자동보발전궤적수학모형.이용모형삼고자괄응계통고계발전궤전속,의거파파부초은정이론추도출자괄응률,분석발전궤삼수변화대속도고계적영향.통과대전궤정자직류려자획득전자초시위치.방진화실험결과표명해산법능실현풍력발전궤가고기동,유흔호적속도근종성능화은태정학도,사발전궤능재액정풍속하최대한도획취풍능,병능은정운행우항속화항공솔구역,차대발전궤삼수변화불민감,산법계산량소.
To meet the requirement for the low-voltage and high-power output,direct-drive wind power generation system employed the topology which combines the dual-three phase permanent magnet synchronous generator (DTP-PMSG) and parallel converter technique.For the issues of position sensors,such as high failure rate and vulnerability to interference,a position sensorless vector control scheme was proposed on the basis of power control of wind power generators.The mathematic model of DTP-PMSG was built according to vector space decomposition theory.Model reference adaptive system (MRAS) was used to estimate generator speed and the adaptive law was obtained according to Popov super stability theory.Furthermore,the effect of generator parameter deviation on speed estimation was analyzed.Rotor initial position was determined by exciting stator windings with direct current.Simulation and experimental results show that the proposed control scheme is able to reliably realize generator starting.Moreover,it has good performance in speed tracking and high steady accuracy.Thereby,wind power generator can capture maximum wind energy below rated wind speed and run stably in constant speed and constant power regions.In addition,the proposed scheme is simple and robust to the errors of generator parameters.