Measurement framework for analysis of dynamic behavior of single-phase power electronic devices

Abstract

This paper studies the impact factors on the dynamic behavior of single-phase power electronic devices in low-voltage grids. White-box models are able to reflect the dynamic behavior, but require a detailed knowledge of the device. Black-box models can be easily parametrized by measurements, but are limited to small signal studies in frequency domain. No studies exist on black-box approaches reflecting the dynamic behavior of power electronic devices. A systematic, measurement based identification method considering the dynamic behavior is required to develop such dynamic black-box models. The aim of this paper is, to provide an overview of the impact factors on the dynamic behavior of power electronic devices as basis for the development of respective measurement procedures. An identification approach and its possible implementation for a laboratory test stand is proposed. Quantifying the impact factors with respect to the dynamic system response in terms of linear and non-linear characteristic provides the opportunity to develop a set of new dynamic models that can be used to improve e.g. stability studies for low voltage networks with a large penetration of modern power electronic devices in the future. First results are presented exemplarily for photovoltaic inverters.