Continuous commutation failure suppression strategy in hybrid multi-infeed HVDC transmission system

• Published in: 电力工程技术 Vol. 41; no. 2; pp. 20 - 28
• Main Authors: ZHONG Mingming, XIA Chengjun, LI Shoutao, HUANG Chuyin, LI Chengxiang
• Format: Journal Article
• Language: Chinese
• Published: Editorial Department of Electric Power Engineering Technology 28.03.2022
• Subjects: adaptive current limit; additional reactive power control; continuous commutation failure; coordinated control; dynamic power limiting; hybrid multi-feed high voltage direct current system
• ISSN: 2096-3203
• DOI: 10.12158/j.2096-3203.2022.02.003

For the wide application of high voltage direct current (HVDC) transmission engineering,the continuous commutation failure of line commutated converter HVDC (LCC-HVDC) has a seriously negative impact on the stable operation of the power system. Therefore,in order to mitigate the continuous commutation failure of LCC-HVDC in hybrid multi-feed HVDC system,from the perspective of increasing the LCC-HVDC commutation voltage,a coordinated control strategy for hybrid multi-infeed HVDC systems is proposed in this paper. According to the real-time reactive power shortage of the conventional DC,the reactive power and active power of voltage source converter HVDC (VSC-HVDC) output are dynamically adjusted by this strategy,thereby changing the transient stable operating point of VSC-HVDC. Through the coordinated control of this strategy,the continuous commutation failure of LCC-HVDC is suppressed and the transmission capacity of the active power of the DC transmission system is greatly improved. Finally,a simulation mod