Work

Research on Measures to Limit Short-Circuit Current by Changing the Structure of the Power Grid

Year: 2025

Type: article

Abstract: This paper addresses the increasingly severe issue of excessive short-circuit currents brought about by the rapid development of large power grids. The working principles of structural changes in the grid as a means of limiting currents are studied, and an impedance matrix is constructed using the additional branch method to analyze the control effects of these limiting measures on short-circuit currents. To explore how to control the level of short-circuit currents in large power grids, this paper provides a detailed analysis of the working principles, advantages, and disadvantages of eight grid structural change measures, including electromagnetic ring network breaking, bus splitting, line interruption, and line coupling. The applicable conditions for each short-circuit-current-limiting measure are established, and specific engineering simulation cases are used to verify their effectiveness in limiting short-circuit currents. The results indicate that this research plays a significant role in controlling short-circuit currents in power systems, maintaining the safe and stable operation of power systems, and improving the structure of power system networks.

Source: Energies

DOI: 10.3390/en18082098

Authors: Shuqin Sun, Guanghao Zhou, Yunting Song, Xiaojun Tang, Yuguang Zhou, Zhenghai Yuan

Institutions: Jilin University, China Electric Power Research Institute

Language: English

Topic: Power System Optimization and Stability

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: gold

Estimated APC paid: $3,137