© The Institution of Engineering and Technology
A test circuit for modular multilevel converter (MMC)-based voltage-sourced converter valves in high-voltage direct current (HVDC) system is dealt with. The proposed scheme has an ability to provide a submodule current having DC component as well as AC component to represent real operating condition of HVDC transmission system. There is no need of extra power supply to provide the DC current component because the scheme has inherent circulating DC current between rectifier and inverter valves. Therefore, only one small power rated DC power supply is necessary. Experiments are carried out to show the validity of the proposed test circuit.
References
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4. Xu, T., Davidson, C.C.: ‘Operational tests for the MMC-based VSC valves’. PCIM Europe 2014, Int. Exhibition and Conf. for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, Nuremberg, Germany, May 2014, pp. 485–492.
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1. : ‘Voltage sourced converter (VSC) valves for high-voltage direct current (HVDC) power transmission – electrical testing’ (IEC, Switzerland, 1.0 edn.).
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2. CIGRE Working Group B4.48: ‘Components testing of VSC system for HVDC applications’ (CIGRE, France, 2011).
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3. Xu, T., Donoghue, M.W., Davidson, C.C.: ‘IGBT overcurrent turn-off tests for the MMC-based VSC valves’. 15th European Conf., Power Electronics and Applications (EPE), Lille, France, September 2013, pp. 1–10, .
http://iet.metastore.ingenta.com/content/journals/10.1049/el.2016.3111
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Test circuit for MMC-based VSC valves in HVDC power station