Study on ultra-low residue voltage of surge protective device based on low pass filter principle
LUO Jiajun1, FENG Haiyang1, LENG Dingding2, CAI Jianbi3
1. Shenzhen DOWIN Lightning Technologies Co., Ltd, Shenzhen, Guangdong 518132;
2. College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang, Guangdong 524088;
3. College of Electronics and Information Engineering, Guangdong Ocean University, Zhanjiang, Guangdong 524088
Lightning is a low frequency impulse wave, and its frequency spectrum is mainly distributed in low frequency band. The relationship between filter parameters and residual voltage is studied from the perspective of frequency domain by analyzing lightning spectrum, LC circuit Multisim simulation and lightning test. The experimental results show that the matched LC low-pass filter circuit in parallel behind the surge protective device (SPD) can filter the low-frequency energy of the remaining current and reduce the steepness of the residual voltage wave. Thus it can obtain extremely low residual voltage and give better protection than the SPD with multiple sets of energy coordination. Testing also proves that various magnetic core inductors will produce different degrees of magnetic saturation phenomenon when discharging lightning current, which can cause the loss of circuit matching and is not suitable for SPD filter circuit.
罗佳俊, 冯海洋, 冷丁丁, 蔡剑碧. 基于低通滤波原理的电涌保护器超低残压研究[J]. 电气技术, 2022, 23(3): 17-22.
LUO Jiajun, FENG Haiyang, LENG Dingding, CAI Jianbi. Study on ultra-low residue voltage of surge protective device based on low pass filter principle. Electrical Engineering, 2022, 23(3): 17-22.
2022, Vol. 23 
