CAJ | 학술논문

针对双馈式变速变桨风力发电机并网系统,对其控制技术进行研究,提出了一种基于链系统理论的转子电流控制方法,建立起了变速变桨发电机结构分散化并网控制器模型,它由2个单元模型、2条因果链和2支链间关联的模型构成.在此模型的基础上,根据链系统的预估机制和控制方案,给出了以发电机转子的d轴电流、q轴电流为受控量的关联系统的结构分散化控制算法.仿真结果表明,该新型控制方法与传统的PI控制方法相比,不仅不需要进行常规控制时繁琐的PI参数整定,而且可以使得发电机转子的d轴电流、q轴电流在有限时间内迅速到达参考值,实现快速收敛和较好的跟踪精度.
침대쌍궤식변속변장풍력발전궤병망계통,대기공제기술진행연구,제출료일충기우련계통이론적전자전류공제방법,건립기료변속변장발전궤결구분산화병망공제기모형,타유2개단원모형、2조인과련화2지련간관련적모형구성.재차모형적기출상,근거련계통적예고궤제화공제방안,급출료이발전궤전자적d축전류、q축전류위수공량적관련계통적결구분산화공제산법.방진결과표명,해신형공제방법여전통적PI공제방법상비,불부불수요진행상규공제시번쇄적PI삼수정정,이차가이사득발전궤전자적d축전류、q축전류재유한시간내신속도체삼고치,실현쾌속수렴화교호적근종정도.
In view of doubly-fed variable speed and pitch wind turbine grid-connected system, this paper deals with its control strategies in detail and proposes a rotor current control method based on the chain theory. A controller is built, which consists of two unit models, two causality chains and an association model between two chains. On the basis of this model, according to the prediction mechanism and the control scheme, the decentralized control algorithm is designed for the connection system with the d-axis current and q-axis current as its controlled outputs. The simulation results show that this new control method not only avoids the cumbersome PI parameter tuning, but also can acquire the reference values of the generator d-axis current and the q-axis current in finite time and obtain a faster convergence and better tracking precision compared with the conventional control methods. It has important practical significance and application value.