基于d,q坐标系的微电网电压不平衡研究
发布时间:2018-11-23 14:35
【摘要】:由于分布式电源所接负载的不对称,使得分布式电源的电压质量受到严重影响。故在此提出一种电压质量控制策略,对分布式电源输出电压进行不平衡补偿,该方法通过信号延迟法对不平衡信号进行正负序提取;采用加虚拟阻抗的下垂控制器实现分布式电源的功率均分;利用d,q坐标系下的不平衡补偿控制器,实现电压的自动补偿稳定;通过电压电流双环控制,进一步实现控制参数的跟踪和实时修正,从而提升整个控制系统的性能。最后通过仿真实验结果证明了所提控制策略的有效性。
[Abstract]:Because of the asymmetry of the load, the voltage quality of the distributed power supply is seriously affected. In this paper, a voltage quality control strategy is proposed to compensate the unbalanced output voltage of the distributed power supply. The method extracts the unbalanced signal from positive and negative sequence by the method of signal delay. The droop controller with virtual impedance is used to realize the average power distribution of the distributed power supply, and the unbalanced compensation controller in the dq coordinate system is used to realize the automatic compensation and stability of the voltage. Through the double loop control of voltage and current, the tracking and real time correction of control parameters are further realized, thus improving the performance of the whole control system. Finally, the simulation results show the effectiveness of the proposed control strategy.
【作者单位】: 陇东学院电气工程学院;
【基金】:甘肃省高等学校科研项目(2016B-102) 陇东学院青年科技创新项目(XYBY140207)~~
【分类号】:TM727
[Abstract]:Because of the asymmetry of the load, the voltage quality of the distributed power supply is seriously affected. In this paper, a voltage quality control strategy is proposed to compensate the unbalanced output voltage of the distributed power supply. The method extracts the unbalanced signal from positive and negative sequence by the method of signal delay. The droop controller with virtual impedance is used to realize the average power distribution of the distributed power supply, and the unbalanced compensation controller in the dq coordinate system is used to realize the automatic compensation and stability of the voltage. Through the double loop control of voltage and current, the tracking and real time correction of control parameters are further realized, thus improving the performance of the whole control system. Finally, the simulation results show the effectiveness of the proposed control strategy.
【作者单位】: 陇东学院电气工程学院;
【基金】:甘肃省高等学校科研项目(2016B-102) 陇东学院青年科技创新项目(XYBY140207)~~
【分类号】:TM727
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