Field-line coupling characteristics of relay protection device under strong electromagnetic pulse

Yao Dingding; Zhang Weidong; Jin Long; Zhou Zexin; Zhou Guanglong

doi:10.11884/HPLPB202537.250014

Volume 37 Issue 7

Jul. 2025

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Yao Dingding, Zhang Weidong, Jin Long, et al. Field-line coupling characteristics of relay protection device under strong electromagnetic pulse[J]. High Power Laser and Particle Beams, 2025, 37: 075003. doi: 10.11884/HPLPB202537.250014

Citation:

Yao Dingding, Zhang Weidong, Jin Long, et al. Field-line coupling characteristics of relay protection device under strong electromagnetic pulse[J]. High Power Laser and Particle Beams, 2025, 37: 075003. doi: 10.11884/HPLPB202537.250014

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Field-line coupling characteristics of relay protection device under strong electromagnetic pulse

doi: 10.11884/HPLPB202537.250014

1.
State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
2.
National Key Laboratory of Power Grid Safety, China Electric Power Research Institute, Beijing 100192, China

Received Date: 2025-01-15
Accepted Date: 2025-06-03
Rev Recd Date: 2025-06-03

Available Online: 2025-06-14

Publish Date: 2025-07-09

Abstract

Abstract

Strong electromagnetic pulse can induce nanosecond rising edge pulse conduction disturbance on the cable in the form of field-transmission line coupling, which poses a great threat to the equipment at the end of the cable. For a certain type of relay protection device, the immunity performance is tested first, and then the high-altitude electromagnetic pulse irradiation test under the field-line coupling path is carried out to obtain the coupling characteristics of the device port. The device malfunctions when the common mode current coupled to the signal port reaches 32.45 A and above. At the same time, the pulse current injection test is carried out. When the pulse current injected into the signal port reaches 36.92 A or more, the device malfunctions, further confirming the critical interference threshold of the device port. Through the establishment of the field-line coupling model of the secondary cable in the substation and the signal cable in the protective panel cabinet, the coupling quantity of high-altitude electromagnetic pulse in different scenarios is calculated, and the key points of field-line coupling protection are proposed. The research results can provide reference for the evaluation of anti-interference ability and protection technology of relay protection devices in strong electromagnetic pulse environments.
- strong electromagnetic pulse,
- relay protection,
- field-line coupling,
- threshold characteristics,
- current injection method

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References(20)

References

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