Adaptive Staged Overcurrent Protection Using Pre-Fault and Post-Fault Thevenin Parameters

Shimin Xue; Yuexuan Li; Junting Zhang; Xu Zhang; Bin Li

doi:10.17775/CSEEJPES.2022.06440

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Adaptive Staged Overcurrent Protection Using Pre-Fault and Post-Fault Thevenin Parameters

Regular Papers | 更新时间：2026-10-10

- Adaptive Staged Overcurrent Protection Using Pre-Fault and Post-Fault Thevenin Parameters
- CSEE Journal of Power and Energy Systems Vol. 12, Issue 5, Pages: 2318-2327(2026)
- 作者机构：
  
  School of Electrical and Information Engineering, Tianjin University,Tianjin,China
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2022.06440
  CLC：
- Published：01 September 2026
- 稿件说明：
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Shimin Xue, Yuexuan Li, Junting Zhang, et al. Adaptive Staged Overcurrent Protection Using Pre-Fault and Post-Fault Thevenin Parameters[J]. CSEE Journal of Power and Energy Systems, 2026, 12(5): 2318-2327.
DOI：

Shimin Xue, Yuexuan Li, Junting Zhang, et al. Adaptive Staged Overcurrent Protection Using Pre-Fault and Post-Fault Thevenin Parameters[J]. CSEE Journal of Power and Energy Systems, 2026, 12(5): 2318-2327. DOI： 10.17775/CSEEJPES.2022.06440.

摘要

Abstract

This paper presents an adaptive staged overcurrent protection system based on predicted post-fault Thevenin equivalent parameters. The presented protection scheme can be used in a distribution system with more than one Inverter Interfaced Distribution Generators (IIDGs). To implement the protection system

equations of pre-fault and post-fault Thevenin equivalent parameters are obtained and relationship between them is revealed. Then protection's stage I and stage II trip currents are calculated by an easy algorithm based on that relationship. What's more

a sensitivity verification is applied to the Stage II operating current

enabling both Stage I and Stage II to protect the entire line

similar to conventional overcurrent (OC) protection. To verify equations and ensure protection system working normally

a distribution system is built in PSCAD/EMTDC. Simulation and calculation results show that the sensitivity and the selectivity of the protection system satisfy the need of an OC protection.

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