A decision-making method for the operation flexibility enhancement of hybrid cascaded MTDC

Frontiers in Energy Research

Energy Research

Yuanshi Zhang¹  Yuhan Wang¹  Zhou Li² 

[1] School of Electrical Engineering, Southeast University, Nanjing, China;null;

关键词: LCC-HVDC;    VSC-HVDC;    hybrid cascaded HVDC;    MTDC;    decision-making;    normal control;    abnormal control;   

DOI  :  10.3389/fenrg.2023.1251496

 received in 2023-07-01, accepted in 2023-08-28,  发布年份 2023

来源: Frontiers

【 摘 要 】

To enable the integration of large-scale renewable energy, hybrid HVDC technology, which combines the technical advantages of LCC-HVDC and VSC-HVDC, is being gradually deployed in the power grid nowadays. The operation of the Wu-dong-de Hybrid DC Project and the Jian-su Hybrid cascaded MTDC Project has proved its advantages. However, for the simultaneous application of different converter station technologies in the system, the control strategies become complex. Issuing appropriate control instructions to ensure system stability according to operational requirements is an issue that cannot be ignored in decision-making. Even under abnormal conditions, when the topology changes due to various failure scenarios, reasonable decision-making and precise control instruction definitions are required. To achieve flexible planning of the MTDC system, this paper presents a decision-making method for control strategies of a hybrid cascaded MTDC system, which analyzes the control strategy combinations selected for normal and abnormal conditions of the MTDC system. In addition, a control instruction calculating method and decision-making process for precise control in normal and abnormal control conditions is proposed. Simulation results based on a five-terminal hybrid cascaded MTDC in PSCAD/EMTDC have verified the effectiveness of the proposed method.

【 授权许可】

Unknown   
Copyright © 2023 Wang, Li and Zhang.