Decentralized stability rules for microgrids | IEEE Conference Publication | IEEE Xplore

Decentralized stability rules for microgrids


Abstract:

Stability certification of microgrids can be challenging due to the lack of information on exact values of system parameters. Moreover, full-scale direct stability analys...Show More

Abstract:

Stability certification of microgrids can be challenging due to the lack of information on exact values of system parameters. Moreover, full-scale direct stability analysis for every system configuration can be economically and technically unjustified. There exist a demand for simple conditions imposed on system components that guarantee the whole system stability under arbitrary interconnections. Most of existing methods are relying on the so-called passivity property which can be difficult to realize by all the system components simultaneously. In the present manuscript we develop an approach for certifying the system stability by separately considering its properties in different regions of frequency domain. We illustrate our method on the case of droop-controlled inverters and show that while these inverters can never be made passive, reasonable stability certificates can be formulated by careful consideration of their input admittance for different frequency regions. We discuss the generalization of the method for different types of microgrid components.
Date of Conference: 10-12 July 2019
Date Added to IEEE Xplore: 29 August 2019
ISBN Information:

ISSN Information:

Conference Location: Philadelphia, PA, USA

I. Introduction

Microgrids are becoming an increasingly popular topic for both academic and industrial society [1]. The advances in power electronics technologies have lead to significant decrease in renewable generation costs which inspired discussions about splitting the existing distribution grids into autonomous systems. Subsequently, there have been a significant progress in development of control architectures for power electronics-interfaced generation allowing for flexible microgrid operation [2], [3]. It was soon realized that control methods that were standard for large scale power systems have rather limited applications in microgirds due to stability constraints [4]. Moreover, modelling approaches (ex. modelling based on time-scale separation) routinely used for conventional power systems appeared to be inadequate for microgrids, which demands for new modeling techniques to be developed [5].

Contact IEEE to Subscribe

References

References is not available for this document.