SISO Transfer Functions for Stability Analysis of Grid-Connected Voltage-Source Converters

Hongyang Zhang, Xiongfei Wang*, Lennart Harnefors, Hong Gong, Jean Philippe Hasler, Hans Peter Nee


Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

23 Citationer (Scopus)


Converter-grid interaction is of great interest in a weak-grid condition. This paper presents a single-input-single-output (SISO) open-loop transfer function for the stability analysis of grid-connected voltage-source converters. Differing from the conventional input impedance method and the eigenvalue analysis, an alternative multi-input-multi-output closed-loop system is developed in the paper and it eventually yields an SISO open-loop transfer function. This enables the application of a single Nyquist curve for analyzing the overall system stability. The model is validated against time-domain simulations as well as experimental results showing excellent accuracy for predicting the system stability.
TidsskriftIEEE Transactions on Industry Applications
Udgave nummer3
Sider (fra-til)2931-2941
Antal sider11
StatusUdgivet - maj 2019


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