摘要
永磁直驱风电机组采用传统的矢量控制策略虽然具有算法简单、实施可靠等优点,但也存在动态响应慢、控制链路存在耦合的问题。针对这个问题,提出一种永磁直驱风力发电机组的直接电流矢量最优控制策略。新型控制策略是在永磁直驱风电机组传统dq矢量控制基础上,略微改进了控制结构,结合最优控制理论原理,引入非线性约束,并同时应用到风电变流器机侧和网侧控制中,实现了最大功率点跟踪、无功功率输出控制和电网电压支持等功能。最后,为了验证控制策略的有效性,基于MATLAB/Simulink平台搭建了永磁直驱风电机组仿真模型,并使用了传统矢量控制器和新型控制器进行了仿真对比研究。计算结果表明,使用新型直接电流矢量最优控制时,各方面控制性能明显优于传统矢量控制。
Direct-driven permanent magnet synchronous generator wind power system with traditional vector control strategy has serval advantages, such as simple algorithm, and reliable implementation. However, there are also slow dynamic response and control link coupling problem. Aiming at it, a direct current vector optimal control for direct-driven permanent magnet synchronous generator wind power system was proposed. The new control strategy was based on traditional dq vector control method. In order to achieve the maximum power point tracking and reactive power control and grid voltage support, the traditional vector control structure was slightly modified, and the nonlinear constraint was introduced with the optimal control theory, and then the new controller was applied to both the generator side and grid side of the wind power converter. In order to verify the validity of the proposed method, the simulation model of the wind power system was built with MATLAB/Simulink platform, and the traditional vector controller and the new controller was simulated and compared. The results showed that, using new type of direct current vector optimal control, the control performance was significantly superior to the traditional vector control.
出处
《电机与控制应用》
北大核心
2017年第3期22-29,35,共9页
Electric machines & control application
基金
淮安市重点研发计划(HAG2015018)
淮安市应用研究与科技攻关(农业)计划(HAN2014037)
关键词
风力发电
永磁同步发电机
直接电流矢量控制
最优控制
直流电压控制
wind power
permanent magnet synchronous generator
direct-current vector control
optimal control
DC-link voltage control