离网型同步风力发电机单位功率因数新型控制策略  

New Control Strategy for Unit Power Factor Stand-alone Synchronous Wind Turbine

作　　者：张思清 罗振鹏[1] 石多峰 王淑玉 张志艳 ZHANG Siqing;LUO Zhenpeng;SHI Duofeng;WANG Shuyu;ZHANG Zhiyan(School of Electric Power,Inner Mongolia University of Technology,Hohhot 010080,Nei Monggol,China)

机构地区：[1]内蒙古工业大学电力学院,内蒙古自治区呼和浩特010080

出　　处：《电气传动》2022年第3期3-9,16,共8页Electric Drive

基　　金：国家自然科学基金资助项目(61763037);内蒙古自治区高等学校科学技术研究项目(NJZY19077);内蒙古工业大学科学研究项目(ZD201718)。

摘　　要：针对离网型直驱永磁风电系统机侧变换器无功容量过大问题,提出了一种永磁同步风力发电机单位功率因数新型控制策略。该控制策略首先是将同步旋转坐标系基于永磁同步电机转子磁场定向,其次求解出无功为零时的d轴电流i_(sd),通过分析i_(sd)和永磁同步电机的空间矢量,设计出永磁同步电机矢量控制下的一种新型的i_(sd)直接给定方案。为了减小谐波电流、降低电机损耗,引入了比例积分谐振(PI-RES)电流内环控制,并给出了其参数设计。最后,为了适应离网控制需求,设计了PI电压外环控制,并给出了其参数设计。仿真结果显示:运用PI-RES控制后电机输出电流谐波得到了明显改善,并且相比于传统控制方式,新型控制虽然控制结构简单,但响应速度更快并且无功波动更小,验证了设计控制策略的可行性以及参数设计的正确性。Aiming at the problem of excessive reactive power capacity of stand-alone direct-drive permanent magnet wind power system generator-side converter,a new control strategy for unit power factor of permanent magnet synchronous wind turbine was proposed.In this control strategy,firstly,the synchronous rotating coordinate system was based on the rotor field orientation of the motor.Secondly,the d-axis current i_(sd) was solved when the reactive power was zero.By analyzing the i_(sd) and the space vector of the permanent magnet synchronous motor,a new type of i_(sd) direct setting scheme under the vector control of permanent magnet synchronous motor was designed.At the same time,in order to reduce the harmonic current and the motor loss,the proportional integral resonance(PI-RES)current inner loop control was introduced and its parameter design was given.Finally,in order to meet the stand-alone control requirements,PI voltage outer loop control was designed and its parameter design was given.The simulation results show that the harmonics of the motor output current have been significantly improved using the PI-RES control.Compared with the traditional control method,the new control has a simple control structure,but has a faster response and less reactive power fluctuations,which verifies the feasibility of the design for the control strategy and the correctness of the parameter design.

关 键 词：离网型风力发电 单位功率因数控制 矢量控制 比例积分谐振(PI-RES)控制 

分 类 号：TM351[电气工程—电机]