一种5kHz逆变串联型高频激励融冰电源及其控制策略研究  

Research on a 5 kHz series inverter high-frequency excitation de-icing power supply and control strategy

作　　者：何洋 周羽生[1] 彭志勇 刘曼琴 周可 汤赐[1] He Yang;Zhou Yusheng;Peng Zhiyong;Liu Manqin;Zhou Ke;Tang Ci(School of Electrical and Information Engineering,Changsha University of Science&Technology,Changsha 410114,China)

机构地区：[1]长沙理工大学电气与信息工程学院,长沙410114

出　　处：《电测与仪表》2020年第18期97-102,共6页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51307009);贵州电网防冰减灾重点实验室研究项目资助(GZ2015-2-0055)。

摘　　要：输电线路覆冰会危害电力系统安全稳定运行,高频激励融冰作为一种新型的融冰方法,具有可在线融冰的技术发展前景。高频激励电源是该融冰技术的核心装置,文中研究了一种5kHz高频激励融冰电源。通过H桥功率单元模块串联实现大功率的输出,采用载波相移调制技术降低开关频率,增大逆变器的输出电压及功率。提出了一种在双闭环控制的基础上增加一个电压幅值外环的控制方法,有效地改善了系统的动态性能和稳定性,消除了系统静差,得到了良好的输出波形。仿真验证了高频激励电源设计和控制方法的可行性。Ice coating on transmission lines will endanger the safe and stable operation of the power system.High-frequency excitation ice melting is a novel type of de-icing method,which has the prospect of technology development of de-icing online.The high-frequency excitation power supply is the core device of the de-icing technology.In this paper,a 5kHz high-frequency excitation de-icing power supply for ice-covered lines is studied.High-power output is realized by series H-bridge power unit modules,and carrier phase shift modulation technology is adopted to reduce the switching frequency and increase the output voltage and power of the inverter.A control method of adding a voltage amplitude outer loop based on double closed loop control is proposed,which effectively improves the dynamic performance and stability of the system,eliminates the system static difference,and obtains a good output waveform.The simulation verifies the feasibility of high-frequency excitation power supply design and its control method.

关 键 词：融冰 串联型逆变器 高频电源 载波相移 输出控制 

分 类 号：TM614[电气工程—电力系统及自动化]