不同使用类别下隔离开关单极灭弧容量对比研究

Comparative Study on Single Pole Arc Extinguishing Capacity of Isolation Switches Under Different Usage Categories

随着光伏与储能系统技术的不断进步,电压提升至现在主流的1500 V,通常使用多极串联形式以满足电压不断提升的需求,导致现有直流隔离开关产品成本高、体积大且在使用类别中具有一定局限性。因此,针对直流隔离开关产品使用工况展开讨论,分析不同时间常数下预期电流波形的差异,提出一种改进型灭弧室结构,并对隔离开关产品在不同使用类别时灭弧容量差异导致的实验结果进行分析,为开关产品在不断提高的电压系统中提高适用性提供新思路。

With the continuous advancement of photovoltaic and energy storage system technology,the voltage has been raised to the mainstream of 1500 V,and the multi pole series connection is usually used to meet the demand for continuous voltage increase,resulting high cost,large volume,and certain limitations in the use category of existing DC isolation switch products.Therefore,a discussion is conducted on the operating conditions of DC isolation switch products,analyzing the differences in expected current waveforms under different time constants,proposing an improved arc extinguishing chamber structure,and analyzing the experimental results caused by the differences in arc extinguishing capacity of isolation switch products under different usage categories,providing new insights for enhancing the applicability of switch products in voltage systems that are continuously being upgraded.