Effective Numerical Simulation of Fault Transient System

TL;DR

This paper introduces a novel numerical method for simulating fault transients in power systems, demonstrating improved stability analysis of synchronous generators after faults.

Contribution

It develops a structure-preserving numerical approach and a switching method, enhancing the simulation accuracy and efficiency over existing predictor-corrector methods.

Findings

The new method accurately models fault transient processes.

It accelerates the reduction of circuit systems.

Numerical results confirm the method's effectiveness and reliability.

Abstract

Power systems, including synchronous generator systems, are typical systems that strive for stable operation. In this article, we numerically study the fault transient process of a synchronous generator system based on the first benchmark model. That is, we make it clear whether an originally stable generator system can restore its stability after a short time of unstable transient process. To achieve this, we construct a structure-preserving method and compare it with the existing and frequently-used predictor-corrector method. We newly establish a reductive form of the circuit system and accelerate the reduction process. Also a switching method between two stages in the fault transient process is given. Numerical results show the effectiveness and reliability of our method.