A Hybrid HVDC Topology Suitable for Large-Scale Pure Clean Energy Power Base Transmission

doi:10.11930/j.issn.1004-9649.202205044

Abstract

Abstract: In order to meet the transmission needs of large-scale pure new energy power bases, after topology comparison, this paper used a hybrid cascaded topology consisting of a line commutated converter (LCC) and a modular multilevel converter (MMC) in the sending end and a hybrid high voltage direct current (HVDC) scheme featuring a diode-MMC (D-MMC) topology in the receiving end. Specifically, the rectifier station MMC provides the alternating current (AC) voltage support at the sending end and cooperates with the LCC as a sending power to balance transfer stations. Then the basic control and fault ride-through strategy of the system is designed so that the system can stably send out new energy power and has both economy and fault ride-through capability. Finally, a ±800 kV/5000 MW bipolar direct current (DC) transmission simulation model is built in PSCAD/EMTDC to verify the effectiveness of the proposed control and fault ride-through strategy, and the results indicate that the selected topology is suitable for transmission scenarios of large-scale pure new energy power bases.

Key words: line commutated converter, modular multilevel converter, high power diode valve, hybrid HVDC, clean energy power base transmission

XU Wenzhe, ZHANG Zheren, XU Zheng. A Hybrid HVDC Topology Suitable for Large-Scale Pure Clean Energy Power Base Transmission[J]. Electric Power, 2023, 56(4): 17-27.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202205044

https://www.electricpower.com.cn/EN/Y2023/V56/I4/17

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