DC Current Order Optimization Based Strategy for Recovery Performance Improvement of LCC-HVDC Transmission Systems  

作　　者：Renlong Zhu Xiaoping Zhou Shuchen Luo Lerong Hong Hanhang Yin Yifeng Liu 

机构地区：[1]College of Electrical and Information Engineering,Hunan University,Changsha 410082,China [2]State Grid Hunan Electric Power Company Limited Economical and Technical Research Institute,Changsha 410011,China

出　　处：《Journal of Modern Power Systems and Clean Energy》2023年第3期1020-1026,共7页现代电力系统与清洁能源学报（英文）

基　　金：supported by the National Key Research and Development Program of China(No.2021YFB2400902);the Innovation Young Talents Program of Changsha Science and Technology Bureau(No.kq2107005);the Postgraduate Scientific Research Innovation Project of Hunan Province(No.QL20210101).

摘　　要：For the safe and fast recovery of line commutated converter based high-voltage direct current(LCC-HVDC)transmission systems after faults,a DC current order optimization based strategy is proposed.Considering the constraint of electric and control quantities,the DC current order with the maximum active power transfer is calculated by Thevenin equivalent parameters(TEPs)and quasi-state equations of LCC-HVDC transmission systems.Meanwhile,to mitigate the subsequent commutation failures(SCFs)that may come with the fault recovery process,the maximum DC current order that avoids SCFs is calculated through imaginary commutation process.Finally,the minimum value of the two DC current orders is sent to the control system.Simulation results based on PSCAD/EMTDC show that the proposed strategy mitigates SCFs effectively and exhibits good performance in recovery.

关 键 词：Line commutated converter(LCC) high-voltage direct current(HVDC) DC current order calculation subsequent commutation failure(SCF) RECOVERY 

分 类 号：TM721.1[电气工程—电力系统及自动化]