Contributing significant Short Circuit Current with Modular Multilevel Matrix Converters in Flywheel Energy Storage Systems

authored by

Jonas Kienast, Steffen Bernet, Gino Sturm, Andreas Hoffmann, Xi Zhu, Bernd Ponick

Abstract

The increasing share of renewable energy sources causes a reduction of inertia provided by conventional synchronous generators to the grid. To enable a stable operation in converter dominated grids a replacement of the inertial response of synchronous generators is required. This paper describes a flywheel energy storage system for 270 MV A, which provides synthetic inertia and reactive power for voltage stabilization for large grid areas. The flywheel is operated by an induction generator and a Modular Multilevel Matrix Converter (M3C). The authors show that by using the M3C a significant short circuit power of up to 2.5 times the rated power can be delivered, without oversizing the current rating of the converter. This study is conducted analytically and is validated by a simulation of the high power system as well as with an experiment on a small-scale test bench.

Organisation(s)

Institute of Drive Systems and Power Electronics

External Organisation(s)

Technische Universität Dresden

Type

Conference contribution

Pages

509-514

No. of pages

6

Publication date

19.06.2024

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Energy Engineering and Power Technology, Electrical and Electronic Engineering, Mechanical Engineering, Control and Optimization

Sustainable Development Goals

SDG 7 - Affordable and Clean Energy

Electronic version(s)

https://doi.org/10.1109/SPEEDAM61530.2024.10609204 (Access: Closed)