摘要
以220kV光伏变电站为例,利用ATP Draw软件建立雷电波侵入变电站数学模型,计算和模拟雷击过电压,并讨论不同雷击点以及站内避雷器对过电压的影响。结果表明,近区雷击导致的过电压水平较远区雷击时要更为严重,且在站内安装两组避雷器组,可将站内设备的雷电过电压限制在较低的水平,没有超过雷电冲击绝缘水平或保证耐压值,绝缘水平的配合裕度均大于15%。
Taking 220kV photovoltaic substation as example, this paper used ATP Draw software to establish lightning impulse invading substation math model, calculating and simulating lightning impulse over-voltage and discussed different lightning impulse points and arrestors inside station impacts on over-voltage. Results show that the over-voltage level caused by nearer area lightning impulse is more serious than far area lightning impulse, and two groups of arrestors are installed in substation. Lightning impulse over-voltage level of equipment in the station can be restricted at a lower level, without exceeding lightning impulse insulation level or assuring withstanding voltage value, so that fitting margins of insulation level are all more than 15 percent.
出处
《电工电气》
2011年第4期29-31,共3页
Electrotechnics Electric
关键词
光伏电站
雷击过电压
太阳能电池板
绝缘裕度
photovoltaic plant
lightning impulse over-voltage
solar cells
insulation margin
