Progress in High-Altitude Electromagnetic Pulse (HEMP) Standardization

Hoad, Richard; Radasky, William A.

doi:10.1109/temc.2012.2234753

Cited by 38 publications

(21 citation statements)

References 5 publications

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“…We describe here the MIL-STD E1 HEMP electromagnetic pulse waveform we employ in this paper. A double exponential characterization of the waveform is [22,23] E (t) = KE 0 e −αt − e −βt u (t) ,…”

Section: Appendix a Electromagnetic Pulse Waveform And Spectrum Usedmentioning

confidence: 99%

“…Here we also make a connection between the time-domain results and the frequency-domain results via the dominant frequency of the excitation waveform. The military standard (MIL-STD) E1 HEMP waveform [22], summarized in Appendix A, is used for excitation, and the inverse transform is taken to obtain the current and the voltage on the wire as a function of time. The transmission line approximation [10,11] under plane wave excitation is summarized in Appendix B for finite and infinite single lines and forms the basis for the approach presented in the manuscript.…”

Section: Introductionmentioning

confidence: 99%

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Decay Length Estimation of Single-, Two-, and Three-Wire Systems Above Ground Under Hemp Excitation

Campione¹,

Warne²,

Halligan³

et al. 2019

PIER B

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We analytically model single-, two-, and three-wires above ground to determine the decay lengths of common and differential modes induced by an E1 high-altitude electromagnetic pulse (HEMP) excitation. Decay length information is pivotal to determine whether any two nodes in the power grid may be treated as uncoupled. We employ a frequency-domain method based on transmission line theory named ATLOG-Analytic Transmission Line Over Ground to model infinitely long and finite single wires, as well as solve the eigenvalue problem of a single-, two-, and three-wire system. Our calculations show that a single, semi-infinite power line can be approximated by a 10 km section of line and that the second electrical reflection for all line lengths longer than the decay length are below half the rated operating voltage. Furthermore, our results show that the differential mode propagates longer distances than the common mode in two-and three-wire systems, and this should be taken into account when performing damage assessment from HEMP excitation. This analysis is a significant step toward simplifying the modeling of practical continental grid lengths, yet maintaining accuracy, a result of enormous impact.

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Section: Appendix a Electromagnetic Pulse Waveform And Spectrum Usedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Decay Length Estimation of Single-, Two-, and Three-Wire Systems Above Ground Under Hemp Excitation

Campione¹,

Warne²,

Halligan³

et al. 2019

PIER B

View full text Add to dashboard Cite

show abstract

“…High-altitude electro-magnetic pulse (HEMP) is the electromagnetic (EM) pulse that is observed due to nuclear explosions at an altitude of 30 km and above [1,2]. The IEC 61000-2-9 standard [1] established by the International Electronical Commission (IEC) categorizes the radiant environments of HEMP according to the creation of time.…”

Section: Introductionmentioning

confidence: 99%

Design of a Small NEMP Simulator for the Immunity Test of Core Electronic Components in HEMP Environments

et al. 2020

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“…전체에 원치 않는 동작이나 치명적인 고장, 파괴 등을 불 러올 수 있기에 군사 시설뿐만 아니라, 주요 민간시설에 도 방호 대책 수립이 필요하다 [1] . 이를 위해 HEMP 복사 및 전도 환경에 대한 전자 시스템의 방호 성능 평가 기준 과 방법을 MIL-STD-188-125-1 [2] 및 MIL-STD-188-125-2 [3] 에서 제안하고 있으며, EMP 방호 장치의 방호 성능을 차 폐 효과(shielding effectiveness, SE) 성능, 펄스 전류 주입 (pulsed current injection, PCI 시험), 위협 수준 조사(threat level illumination, TLI), 연속파 침잠(continuous wave immersion)의 항목에 대해 제시하고 있다 [4] .…”

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Analysis of HEMP Coupling Signal for a Coaxial Cable Considering Various Cable Parameters

Jo¹,

Noh²,

Kim³

et al. 2020

J. Korean Inst. Electromagn. Eng. Sci.

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In this study, we analyze the coupled signal for various cable parameters when a high-altitude electromagnetic pulse(HEMP) is incident on a cable connected to an EMP protection shelter. The structural conditions or operating environments vary depending on the purpose of use, such as to supply power or transmit communication signals to the internal devices of the shelter. Using the cable equivalent model and simulations, we interpret the coupled signal that is induced in the cable according to the presence or absence of a shielding layer, number and thickness of inner core wires, braiding conditions of the shielding layer, cable length, height from the ground plane, and whether the input terminal is grounded. We compare and analyze the induced current according to the cable parameters based on an RG58 coaxial cable.

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Progress in High-Altitude Electromagnetic Pulse (HEMP) Standardization

Cited by 38 publications

References 5 publications

Decay Length Estimation of Single-, Two-, and Three-Wire Systems Above Ground Under Hemp Excitation

Decay Length Estimation of Single-, Two-, and Three-Wire Systems Above Ground Under Hemp Excitation

Design of a Small NEMP Simulator for the Immunity Test of Core Electronic Components in HEMP Environments

Analysis of HEMP Coupling Signal for a Coaxial Cable Considering Various Cable Parameters

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