Journal of Power, Energy, and Control

Vol. 2 No. 2 (2025)
Articles

Voltage Surge Estimation in Inverter-Cable High-Impedance Load System

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  • B.E. Wilson,
  • E. Armah,
  • N. Tsikata
B.E. Wilson
University of Energy and Natural Resources, Ghana
E. Armah
Norfolk State University, United States
N. Tsikata
University of Mines and Technology, Ghana

Published 21-09-2025

Keywords

  • Load Systems,
  • Voltage Surge,
  • Transmission Line Theory

Copyright (c) 2025 B.E. Wilson, E. Armah, N. Tsikata (Author)

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

[1]
B. E. Wilson, E. . Armah, and N. Tsikata, “Voltage Surge Estimation in Inverter-Cable High-Impedance Load System”, PEC, vol. 2, no. 2, pp. 81–96, Sep. 2025, doi: 10.62777/pec.v2i2.62.

Abstract

This paper presents a theoretical analysis of inverter–cable–high-impedance load systems using transmission line theory. High-frequency inverters with short voltage rise times can induce severe voltage surges at the load terminal due to impedance mismatch and wave reflections. An analytical expression is derived to estimate the peak terminal voltage as a function of the inverter rise time and cable propagation delay. Simulation results obtained using MATLAB confirm that the peak voltage can surge up to twice the DC link value (300 V for a 150 V DC source) when the inverter rise time is less than three times the cable propagation delay. To mitigate this overvoltage, a dV/dt filter is designed for worst-case rise-time conditions (step input), enhancing surge suppression without requiring redesign across varying switching speeds. The proposed method offers a practical, cost-effective solution for long-cable applications in high-frequency inverter systems.

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