将具备自愈能力的金属化膜电容器应用于电力系统中,能够减少事故的发生,提高安全可靠性.在此基础上,需要克服的困难主要是自愈失败导致的元件彻底击穿和自愈过程的金属层蒸发造成的电容量损失.这两者与金属化膜的自愈特性有着极大的关联.相对于直流电压条件下运行的脉冲电容器,交流电压条件下运行的电力电容器具备较高的运行温度,因此有必要对金属化膜在不同温度下的自愈特性进行研究.搭建自愈特性测试平台,在金属化膜上施加不同的温度,使用电测法测量电压、电流波形,以此得出自愈电压、自愈电流、自愈持续时间和自愈能量.结果表明:温度的升高会使自愈电流、自愈持续时间和自愈能量减小.%Application of metallized film capacitor with self-healing capacity to power system can reduce ac-cidents and improve safety and reliability. On this basis,the main difficulties needing to overcome is the complete breakdown due to self-healing failure and capacitance loss caused by metal layer evaporation in the self-healing process. Both of them are more related to the self-healing properties of metallized film. Pow-er capacitor operating under AC voltage condition,compared to the pulse capacitor operating under DC voltage,possesses higher operation temperature. Therefore,it is necessary to study the self-healing charac-teristics of metallized film at different temperatures. Self-healing properties test platform is established,dif-ferent temperatures are applied on the metallized film,the voltage and current waveform are measured by electrometric methods so to obtain self-healing voltage,self-healing current,self-healing duration and self-healing energy. It is shown by the result that rise of temperature can make self-healing current,self-healing duration time and self-healing energy decrease.
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