Stability Analysis of a?Voltage-Source Converter-based Multi-Infeed High-Voltage Direct-Current Transmission System Connected to Offshore Wind Farms

  • 邊 文軒

Student thesis: Master's Thesis

Abstract

This thesis presents the stability-analysis results of a system composed of two offshore wind farms (OWFs) connected to two onshore power grids through a multi-infeed high-voltage direct-current (MI-HVDC) system The OWFs are based on doubly-fed induction generators (DFIGs) and the MI-HVDC system is based on voltage-source converters (VSCs) With the focus laid on the influence of the common tie line in the MI-HVDC system small-signal stability and transient stability are analyzed by utilizing system eigenvalues and time-domain simulations respectively The simulation results show that a VSC-based MI-HVDC system can be more stable than two VSC-based HVDC links which operate independently from each other In addition the stability of the studied VSC-based MI-HVDC link can be significantly influenced by the electrical parameters of the common tie line
Date of Award2017 Aug 9
Original languageEnglish
SupervisorLi Wang (Supervisor)

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