大功率电力电子联合试验装置高电压回路的电源研究

对于大功率阀的运行试验,目前多采用联合试验装置代替传统的背靠背试验回路.当选用3相全控整流桥做为试验装置电源电路的核心部件后,其数学模型、工作状态虽类似于整流桥,但又不能直接套用.文中给出了联合试验装置高电压回路电源电路的拓扑结构和工作原理;利用含直流的电磁暂态仿真定性分析了两种不同的补能方式;给出了补能电流连续方式下的数学模型;结合工程实际给出了参数的计算结果和关键参数的确定原则.为三相全控桥带时变负载的分析提出了一种实用方法.

THE POWER SOURCE RESEARCH ON THE HIGH VOLTAGE CIRCUIT OF THE SYNTHETIC TEST EQUIPMENT

The STC (Synthetic Test Circuit) is the test circuit for operational tests of high power thyristor valves recommended by CIGRE as an alternative to the back to back test circuit. When adopting the fully controlled 3-phase thyristor rectifier as the key component of the power source, the mathematical model and the working theory of the power source are similar but not the same as the rectifier used in HVDC. The topology and the working principle of the power source are provided, and the qualitative analysis of two different operation modes of the power source are given by using EMTDC, then the mathematical model and a detailed analysis of the continuous recharging mode are proposed. And finally some calculation results under real working conditions and key parameters determination principles were given. A practical analysis method is provided for fully controlled 3-phase rectifier with time-variable loads.