动态电压恢复器中的无电流内环控制策略

发布时间：2018-05-03 13:33

本文选题：动态电压恢复器 + 电流内环　；参考：《电力系统自动化》2014年18期

【摘要】：动态电压恢复器(DVR)是解决电压质量问题的有效手段。DVR的控制中常采用电流内环来调节被控对象,增加阻尼。但电流内环不但需要引入额外传感器,还会增加系统设计和调试的复杂程度。文中提出一种无电流内环的控制方法,应用陷波滤波器来设置阻尼,并采用前馈来提高响应速度;在电压环路中应用重复控制器,可使系统具有较高的稳态精度和良好的谐波抑制能力。该方法设计简单,易于实现,且能减少硬件成本。仿真以及在2.2kW装置上的实验结果均验证了该控制方法的有效性和实用性。
[Abstract]:Dynamic Voltage Restorer (DVR) is an effective method to solve the voltage quality problem. In the control of DVR, the current inner loop is often used to adjust the controlled object and increase the damping. But the current inner loop not only need to introduce extra sensors, but also increase the complexity of system design and debugging. In this paper, a current free inner loop control method is proposed. The notch filter is used to set damping and feedforward is used to improve the response speed, and the repetitive controller is applied in the voltage loop. It can make the system have high steady-state accuracy and good harmonic suppression ability. This method is simple, easy to implement and can reduce the cost of hardware. The effectiveness and practicability of the control method are verified by simulation and experimental results on 2.2kW.
【作者单位】：国网江苏省电力公司;国网常州供电公司;江苏安方电力科技有限公司;
【基金】：国家电网公司科技项目“电能质量高级分析关键技术研究与应用”~~
【分类号】：TM761

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