后续回击下限压型浪涌保护器的伏安特性及其级联配合

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Abstract Cascaded surge protective devices (SPDs) are chosen to protect sensitive equipment against surge current in electrical and electronic system in the threat of overvoltage caused by lighting.The two-stage cascaded voltage-limiting SPD is a common form and its main voltage-limiting element is the metal oxide varistor (MOV).Subsequent lightning return stroke occurred in natural lightning flashes not only rises very steeply,but also will affect the V-I characteristics of the MOV and the energy coordination of the two stages.Experiments were carried out in this paper to test the V-I characteristics of the MOV under subsequent lightning return stroke.Based on the characteristic changes of the MOV residual voltage,theoretical analysis was carried out on the SPD coordination under subsequent lightning return stroke.The further simulation considered the influences of the SPD coordination under subsequent lightning return stroke,and the experiments were carried out to verify the simulation results.The simulation and experimental results show that the residual voltages of the MOV under subsequent lightning return stroke increase about 6.8%～36.8% compared with which under 8/20 μs impulse current.The subsequent lightning return stroke makes the cascaded SPDs reach better coordination,but also may cause the malfunction of SPD2 and lose protection capacity accordingly.Meanwhile,the SPD combinations,the distance between cascaded SPDs and the type of load also affect the coordination of SPDs under subsequent lightning return stroke.

Key words： Subsequent lightning return stroke surge protective device (SPD) metal oxide varistor (MOV) V-I characteristics cascaded coordination

Received: 28 July 2015 Published: 19 January 2017

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TN862

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	He Yuwei
	Qu Qianwei
	Liu Yakun
	Jiang Anfeng
	Fu Zhengcai

Cite this article:

He Yuwei,Qu Qianwei,Liu Yakun等. The V-I Characteristics of Voltage-Limiting Type SPD and Its Cascaded Coordination under Subsequent Lightning Return Stroke[J]. Transactions of China Electrotechnical Society, 2017, 32(1): 197-205.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I1/197

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