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The On-site Verification of Key Technologies for Kunbei-Liuzhou-Longmen Hybrid Multi-terminal Ultra HVdc Project

CSEE Journal of Power and Energy Systems 2022年第5期8卷 1281-1289页

作者： Hong Rao Changyue Zou Shukai Xu Xipeng Cai Yan Li Xiaobin Zhao Yuebin Zhou Yu Yang Wei Wei Jun Chen Tianliu Wei Research Institute China Southern Power GridHuangpu DistrictGuangzhou 510080China China Southern Power Grid Huangpu DistrictGuangzhou 510080China

Hybrid high voltage direct current transmission(Hybrid HVdc)is a new type of HVdc technology developed in recent *** combines the characteristics of large-capacity and low cost of the line commutated converters(LCC)and non-commutation failure and dynamic reactive power support of voltage sourced converters(VSCs)in one HVdc *** has technical advantages in the fields of unidirectional power transmission and in the application of improving the stability of multi-infeed HVdcs,giving it broad application *** Kunbei-Liuzhou-Longmen(KBL)project is the first hybrid ultra HVdc *** was put into service on Dec.27th,*** paper introduces the KBL project,analyzes the operation characteristics of hybrid HVdc system,and provides on-site verification of KBL project,including operation of LCC-VSC hybrid system,ultra-high voltage VSC technology using the series of two valve groups,the dc fault ride-though of hybrid VSC without using dc breaker,the connection and disconnection of a third station,and etc.

关键词： dc overhead lines hybrid HVdc LCC-HVdc VSC-HVdc VSC topology on-site commissioning

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Design Aspects of Hybrid HVdc System

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CSEE Journal of Power and Energy Systems 2021年第3期7卷 644-653页

作者： Hong Rao Yuebin Zhou Changyue Zou Shukai Xu Yan Li Liu Yang Weihuang Huang Electric Power Research Institute of China Southern Power Grid Guangzhou 510663China

Hybrid high voltage direct current transmission(Hybrid HVdc)is a new type of HVdc technology developed in recent *** combines the characteristics of large-capacity and low cost of the line commutated converters(LCC)and non-commutation failure and dynamic reactive power support of the voltage sourced converters(VSCs)in one HVdc *** has technical advantages in the fields of unidirectional power transmission and in the application of improving the stability of multi-infeed HVdcs,giving it broad application *** paper defines the basic form of hybrid HVdc first and discusses the characteristics and challenges of different hybrid ***,it analyzes the matching characteristics between LCC and VSC in the station-station hybrid HVdc,studies the key technologies,such as VSC topologies and control strategies for clearing the dc overhead line faults,and introduces the key technologies for analyzing and suppressing the high-frequency resonances between VSC and the power *** this paper,using the Wudongde UHV multi-terminal HVdc as an example,the proposed key technologies are analyzed and verified.

关键词： dc overhead lines high frequency resonance hybrid HVdc LCC VSC

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