Impedance Modelling and Parametric Sensitivity of a VSC-HVDC System: New Insights on Resonances and Interactions

Adedotun J. Agbemuko, José Luis Domínguez-García, Eduardo Prieto-Araujo and Oriol Gomis-Bellmunt
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Adedotun J. Agbemuko: Electrical Power Systems Area, Catalonia Institute for Energy Research, 08930 Barcelona, Spain
José Luis Domínguez-García: Electrical Power Systems Area, Catalonia Institute for Energy Research, 08930 Barcelona, Spain
Eduardo Prieto-Araujo: CITCEA-UPC, Department of Electrical Engineering, Polytechnic University of Catalonia (UPC), 08028 Barcelona, Spain
Oriol Gomis-Bellmunt: CITCEA-UPC, Department of Electrical Engineering, Polytechnic University of Catalonia (UPC), 08028 Barcelona, Spain

Energies, 2018, vol. 11, issue 4, 1-24

Abstract: Pervasiveness of power converters in the electric power system is expected in the future. Such large penetration will change the current power system dynamics leading to uncertain, unexpected, and potentially critical responses. This paper investigates the stability and resonance of a VSC-HVDC (Voltage Source Converter High Voltage Direct Current) link within an AC grid, whilst providing insights into resonances having a role on the grid. This is studied through the impedance-based modelling of the entire system (AC and DC grids), including controls of converters. Additionally, the impact of the different parameters of the hybrid AC-DC power system such as control systems and grid components on the system dynamics and stability is investigated. From this study, the impact of the system components and the controls of the converter on overall resonance response and stability is shown, including potential undesired sub-synchronous and harmonic resonances due to AC-DC system interactions. The analytical impedance-based models developed and obtained is validated through time-domain simulations, the physical model of the whole system is built in Simscape ™ Power Systems ™ and control systems in MATLAB/Simulink ® (R2017b). This has demonstrated the validity of the model to deal with and detect such dynamics.

Keywords: harmonic stability; HVDC; impedance model; resonance; sensitivity; stability; VSC (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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