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中文摘要：
在光伏水泵非并网光伏发电机优化控制的研究中,由于光伏水泵系统运行受外界环境影响较大,负载电机在低能量轻载励磁损耗较大,带来系统效率较低的问题。在分析水泵系统工作状态基础上,提出了一种采用矢量控制的弱磁控制投入轻载状态控制的方法。对相关的优化控制方法进行了初步的证明,并利用Matlab/Simulink工具建立光伏水泵系统异步电机部分的仿真模型,对优化前后的电机运行特性进行了仿真,验证节能方法的有效性。对电流、转矩以及转速仿真的结果表明,良好的磁通控制能够在轻载情况维持转速不变情况下对有限的太阳能电能进行高效的应用,并且系统有关转矩稳定性能也得到良好提升,为水泵系统稳定节能运行提供了优化的途径。
英文摘要：
This paper mainly discussed the model of photovoltaic pump system. As the efficiency of the system depends much on the environment,a further more research about its motor should be discussed,especially for the case of photovoltaic pumps working at light load state. Based on the analysis of vector control method of induction motor,a new flux weaken controlling method was given in place of the original constant flux control. In this paper,related excitation current optimization principle was proved,and the simulation verification based on Matlab / Simulink toolkit was given. Simulation results show that the new method can take a high efficient use of limited solar energy and related system performance has also been improved. With this method,technical support can be provided for the efficient operation of photovoltaic pumping systems.
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