Impedance Analysis of Virtual Synchronous Generator-Based Vector Controlled Converters for Weak AC Grid Integration

Arash Asrari, Mehran Mustafa, Meisam Ansari, Javad Khazaei

Research output: Contribution to journalArticle

Abstract

Voltage source converter (VSC) based high-voltage direct current (HVDC) system is an emerging technology in high-power applications. Previous research has shown that VSCs, with commonly used vector current control (VCC) technique, cannot transmit more than 0.4 p.u. of active power when connected to a very weak ac grid. This paper presents a virtual synchronous generator (VSG) control strategy integrated with VCC to allow stable power transfer for very weak ac grid integration. Impedance analysis is used to analyze the designed controller in various scenarios. In addition, sensitivity analysis is performed to study the effect of virtual inertia gains on system stability. Time-domain simulation results using MATLAB/Simscape Power System toolbox show the effectiveness of the developed controller in very weak ac grid integration of VSC-HVDC systems.

Original languageEnglish (US)
Article number8610241
Pages (from-to)1481-1490
Number of pages10
JournalIEEE Transactions on Sustainable Energy
Volume10
Issue number3
DOIs
StatePublished - Jul 1 2019

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Synchronous generators
Electric current control
Electric potential
Integrated control
Controllers
System stability
MATLAB
Sensitivity analysis

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment

Cite this

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abstract = "Voltage source converter (VSC) based high-voltage direct current (HVDC) system is an emerging technology in high-power applications. Previous research has shown that VSCs, with commonly used vector current control (VCC) technique, cannot transmit more than 0.4 p.u. of active power when connected to a very weak ac grid. This paper presents a virtual synchronous generator (VSG) control strategy integrated with VCC to allow stable power transfer for very weak ac grid integration. Impedance analysis is used to analyze the designed controller in various scenarios. In addition, sensitivity analysis is performed to study the effect of virtual inertia gains on system stability. Time-domain simulation results using MATLAB/Simscape Power System toolbox show the effectiveness of the developed controller in very weak ac grid integration of VSC-HVDC systems.",
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Impedance Analysis of Virtual Synchronous Generator-Based Vector Controlled Converters for Weak AC Grid Integration. / Asrari, Arash; Mustafa, Mehran; Ansari, Meisam; Khazaei, Javad.

In: IEEE Transactions on Sustainable Energy, Vol. 10, No. 3, 8610241, 01.07.2019, p. 1481-1490.

Research output: Contribution to journalArticle

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