介绍了全固态调制器采用IGBT 管等固态器件进行串并联组合应用的典型工作模式,分析了固态调制器传统开关组件的检测和保护技术,提出基于开关管阻抗特性的调制组件检测方法,阐述了设计思想及工作原理,给出了工程实现方案和检测方法原理框图,并分析比较了传统的在线检测方法和基于开关管阻抗特性的调制组件检测方法,基于PLC 编程软件平台,根据采样电压的数值及其变化量,实现精确判定IGBT 管损坏数量和百分比的计算。工程应用验证了检测结果的准确可靠。

Typical working mode of all solid鄄state modulator that uses solid鄄state devices such as IGBT tubes to combine series and parallel applications is introduced. Traditional detection and protection functionalities of the solid-state modulator switch modules are analyzed. Detection methods of modulating module based on the impedance characteristic of the switch tube are proposed and its design philosophy and operating principles are discussed. Diagram of this detection method as well as its implementation scheme are also given out. The traditional on-line detection method and the detection method of modulating modules based on the impedance characteristic of the switch tube are compared. By using the sampled voltage value and its variation, the goal of determining the number of broken IGBT tubes and calculating the percentages precisely based on PLC program platform is achieved. The detection result has been verified to be precise and reliable by the engineering application.