500kV隔离开关热稳特性试验与分析

Test and Analysis of the Thermal Stability of 500k V Disconnector

热稳特性是隔离开关重要的性能之一,为了确定设备在稳态及暂态负荷情况下的热稳特性,本文在实验室内采用大电流试验装置,对500 k V隔离开关不同负荷情况进行试验,探索设备温度变化与时间的关系,对试验结果进行了深入的分析。试验及分析结果表明,稳态负荷电流情况下,电流与时间满足经验关系;暂态负荷电流情况下,设备温升与过负荷时间满足经典经验关系。

Thermal stability is one major performance parameter of disconnector. In order to determine the thermal stability under steady and transient load,a large-current test device is used to test a 500 k V disconnector under different load conditions in this paper. The relationship between device temperature changes and applied time is explored. The test and analysis results show that the current and time meet the empirical relationship under steady load current condition,and that temperature increase and load time meet the empirical relationship under transient load current condition.