电网机械终端防跌落抖动的滑膜控制方法研究  

Research on Sliding Film Control Method for Anti-Drop Jitter of Power Grid Mechanical Terminals

作　　者：付佳佳 刘彩霞 胡毅 FU Jiajia;LIU Caixia;HU Yi(Wuhu Power Supply Company,State Grid Anhui Electric Power Co.,Ltd.,Wuhu 241000,China)

机构地区：[1]国网安徽省电力有限公司芜湖供电公司,安徽芜湖241000

出　　处：《自动化仪表》2024年第8期27-31,共5页Process Automation Instrumentation

基　　金：国网安徽省电力有限公司芜湖供电公司科学技术基金资助项目(SGAHWHOOYWJS2200665)。

摘　　要：由于自动兼容式电网的结构复杂,机械终端轨迹到达滑动模态面后难以严格沿着滑动模态面向平衡点滑动,导致电压和功率突变跌落而产生抖动。对此,提出自动兼容式电网机械终端防跌落抖动的滑膜控制方法。构建机械终端数学模型,分析产生跌落抖动问题的原因。提出基于扩张观测器的滑膜控制方法,设计扩张观测器,以获取机械终端系统内部扰动信息。将观测结果用作电流前馈补偿,以优化抗干扰性。结合滑膜控制方法设计滑膜控制器,通过该控制器实现自动兼容式电网机械终端滑膜控制。试验结果表明,该方法的电流功率突变动态波动情况平稳,电网电压跌落85%后恢复至正常电压的速度较快。该方法缓解了跌落抖动程度,有效提高了动态响应波动稳定性,并促进了配电网的发展。Due to the complex structure of auto-compatible power grids,it is difficult for the mechanical terminal trajectory to slide strictly along the sliding mode surface toward the equilibrium point after arriving at the sliding mode surface,which leads to sudden voltage and power drops and generates jitter.In this regard,a sliding film control method for anti-drop jitter of power grid mechanical termials is proposed of the auto-compatible.A mathematical model of the mechanical terminal is constructed to analyze the causes of the drop jitter problem.The sliding film control method based on expansion observer is proposed,and the expansion observer is designed to obtain the internal disturbance information of the mechanical terminal system.The observation results are used as the current feed-forward compensation to optimize the disturbance immunity.Combined with the sliding film control method,a sliding film controller is designed,auto-compatible power grid mechanical terminal sliding film control is realized through the controller.The experimental results show that the method has a smooth dynamic fluctuation of current power mutation and a fast recovery to normal voltage after an 85%drop in grid voltage.The method mitigates the degree of drop jitter,effectively improves the dynamic response fluctuation stability,and promotes the development of the power distribution network.

关 键 词：自动兼容式电网 机械终端系统 滑膜控制 扩张观测器 全局滑动模态 

分 类 号：TH-17[机械工程]