Impact of synchronous condenser on the dynamic behavior of LCC-based UHVDC system hierarchically connected to AC system

Ali Aamir; Li Qiao; Chunyi Guo; Atiq Ur Rehman; Zhizhong Yang

doi:10.17775/CSEEJPES.2018.00420

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Impact of synchronous condenser on the dynamic behavior of LCC-based UHVDC system hierarchically connected to AC system

更新时间：2025-12-18

- Impact of synchronous condenser on the dynamic behavior of LCC-based UHVDC system hierarchically connected to AC system
- CSEE Journal of Power and Energy Systems Vol. 5, Issue 2, Pages: 190-198(2019)
- 作者机构：
  
  1. North China Electric Power University,, Beijing, CN,Beijing
  2. Global Energy Interconnection Research Institute Co. Ltd,Beijing,China,102209
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2018.00420
  CLC：
- Published：2019
- 稿件说明：
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Ali Aamir, Li Qiao, Chunyi Guo, et al. Impact of synchronous condenser on the dynamic behavior of LCC-based UHVDC system hierarchically connected to AC system[J]. CSEE Journal of Power and Energy Systems, 2019, 5(2): 190-198.
DOI：

Ali Aamir, Li Qiao, Chunyi Guo, et al. Impact of synchronous condenser on the dynamic behavior of LCC-based UHVDC system hierarchically connected to AC system[J]. CSEE Journal of Power and Energy Systems, 2019, 5(2): 190-198. DOI： 10.17775/CSEEJPES.2018.00420.

摘要

Abstract

Hierarchical connection (HC) is a very attractive mode for ± 800 kV line commutated converter based ultra high voltage direct current (LCC-UHVDC) system connected to different AC voltage levels because of its ability to reduce the scale factor of a converter transformer. Faults in the HC-UHVDC system can cause commutation failure (CF). In this paper

impact of synchronous condenser (SC) to mitigate CF in HC-UHVDC system is analyzed. A ± 800KV HC-UHVDC system along with synchronous condenser is built in PSCAD/EMTDC. Transient performance analysis of HC-UHVDC for single and three phase to ground faults is investigated. Commutation failure immunity index (CFII)

commutation failure probability index (CFPI)

fault recovery time (FRT)

and transient overvoltage (TOV) are used as measures to evaluate the effects of SC at HC-UHVDC system design. The simulation results show that SC can make the HCUHVDC system less susceptible to CF

effectively improve fault recovery performances of the overall system

and reduce transient overvoltage when single or multiple converters are blocked. The results of this research can provide technical assistance in real world HC-UHVDC projects.

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