【摘要】 特高压直流试验线段担负着开展环境影响研究、为特高压直流输电提供技术支撑等重要任务。作为特高压直流试验线段主电源的1 200 kV/500 mA双极直流发生器的稳定运行对试验基地各项研究的正常开展至关重要。结合发生器的初步设计,采用电磁暂态分析程序ATP-EMTP对该发生器在短路放电情况下以及充电过程中的暂态过程进行仿真计算。分析表明,发生器在充电过程中主电容器上出现的最高过电压为1.35倍。负载放电或发生输出短路时,硅堆上的暂态峰值电流可达正常运行时的9.3倍。输出保护电阻应按承受全电压下50 A短路电流设计。这些结论为该发生器的研制和运行提供了依据。更多还原

【Abstract】 UHVDC test line is applied to research of environmental influence and to technical support to the construction of UHVDC transmission systems.Stable operation of the 1 200 kV/500 mA bipolar UHVDC voltage generator,which is the main power source of the experimental line in a test base,is very important for all the researches.This paper adopts the electromagnetic transient analysis software ATP-EMTP to simulate the transient characteristics of the generator in short-curcuit discharge and charging processes.Simulation results show that the maximum overvoltage on the main capacitors is 1.35 times of the normal one during the charging process,and the maximun transient peak current on the high voltage silicon stack may reach 9.3 times of the normal one under the EUT flashover or output short-circuit status.The output protecting resistor should be designed for operating under full-voltage with 50 A short-cucuit current.This study may benefit design and construction of the bipolar UHVDC generator.更多还原