并联电抗器在交流耐压试验中的补偿计算  

Compensation Calculation of Shunt Reactor in AC Withstand Voltage Test

作　　者：吴洪伟 WU Hongwei(Chongqing Datang International Wulong Hydropower Development Co.,Ltd.,Chongqing 408506,China)

机构地区：[1]重庆大唐国际武隆水电开发有限公司,重庆408506

出　　处：《电工技术》2022年第3期114-116,121,共4页Electric Engineering

摘　　要：中小容量被试品进行交流耐压时采用变频串联谐振装置有时反而不便,如需吊车货车运输,耗费时间,显著增加试验成本,而采用轻型的试验变压器又难以满足要求。为此,采用并联电抗器加试验变压器进行合理的简化计算,进而推导出一套所需电抗器的电感计算公式及确定试验变压器高压侧电压与其试验电压、被试品电容、并联电感、短路阻抗的函数关系。在银盘水电站对8.7/10 kV橡塑绝缘电缆成功进行试验,证明了该公式的正确性,且该公式可推广到更高电压等级的交流耐压试验。For the AC withstand voltage of small and medium-capacity test products,the use of variable frequency series resonant devices is sometimes inconvenient.For example,cranes and trucks are required for transportation,which consumes time and significantly increases test costs.It is difficult to meet the requirements with light test transformers.Therefore,the shunt reactor and test transformer are used for reasonable simplified calculation,and then a set of inductance calculation formula of the required reactor is deduced,and the functional relationship between the high-voltage side voltage of the test transformer and its test voltage,tested object capacitance,shunt inductance and short-circuit impedance is determined.The successful test of 8.7/10 kV rubber plastic insulated cable in Yinpan Hydropower Station proves the correctness of the formula,and the formula can be extended to AC withstand voltage test of higher voltage level.

关 键 词：试验变压器 并联电抗器 电容 交流耐压试验 

分 类 号：TM472[电气工程—电器]