Transient Simulation of Grid-Feeding Converter System for Stability Studies Using Frequency Response Optimized Integrators

TL;DR

This paper introduces a novel transient simulation scheme for grid-feeding converters using frequency response optimized integrators, demonstrating improved efficiency and accuracy in stability studies of power systems.

Contribution

It presents a new simulation approach incorporating frequency response optimized integrators and extends it with standard integrators for enhanced efficiency and ease of development.

Findings

The simulation scheme accurately models grid-feeding converters.

The extended scheme improves computational efficiency significantly.

Adding new devices is simplified with minimal impact on accuracy.

Abstract

A grid-feeding converter system is added to a novel power system transient simulation scheme based on frequency response optimized integrators considering second order derivative. The converter system and its implementation in the simulation scheme are detailed. Case studies verify the accuracy and efficiency of the simulation scheme. Furthermore, this paper proposes and justifies extending the simulation scheme by integrating commonly used numerical integrators considering first order derivative for part of the studied system. The proposed extension has an insignificant impact on the accuracy of the simulation scheme while significantly enhancing its efficiency. It also reduces the development burden in adding new devices.