高压变频器同步投切功能的研究 

徐卫青，杨志勇，冯骥 
(国电南京自动化股份有限公司，江苏 南京 211100) 
 

摘 要： 介绍了高压变频同步投切系统主回路的基本原理及实现方法，给出了同步切换流程及其保护逻辑，切换时利用软件锁相环技术调整变频器输出电压与电网电压的相位、幅值、频率一致，然后通过可编程控制器及自动开关完成变频与工频间的切换，试验验证了该方法的可行性，具有较高的现场应用价值。
关键词： 高压变频器；锁相环；同步投切；连续性；变频故障
中图分类号：TM464 文献标识码：A 文章编号：1007-3175(2014)01-0016-04

Study of High-Voltage Inverter Synchronous Switching Function 

XU Wei-qing, YANG Zhi-yong, FENG Ji 
（GuoDian Nanjing Automation Co., Ltd, Nanjing 2111 00, China） 
 

Abstract: Introduction was made to the basic principle and realizing method of main circuit of high-voltage inverter synchronous switching system. This paper gave the synchronous switching flow chart and its protective logic. On switching, by using software phase-locked loop technique, inverter output voltage was adjusted, as well as the grid voltage phase, amplitude, frequency in uniformity, then the switching between inverter and power was accomplished by the PLC and automatic switch. The test has verified the feasibility of the method, with higher site application value.
        Key words: high-voltage inverter; phase-locked loop; synchronous switching; continuous; inverter failure

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