Multi-quadrant Power Regulation Capability and Short-term Reactive Power Support Control Strategy for CLCC

XIN Yechun; MA Zhiqiang; WANG Tuo; LI Guoqing; HE Yupeng; WANG Yanxu; WANG Weiru; JIANG Shouqi

doi:10.13334/j.0258-8013.pcsee.250607

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Multi-quadrant Power Regulation Capability and Short-term Reactive Power Support Control Strategy for CLCC

更新时间：2026-09-28

- Multi-quadrant Power Regulation Capability and Short-term Reactive Power Support Control Strategy for CLCC
- Vol. 46, Issue 13, Pages: 5358-5370(2026)
- 作者机构：
  
  现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学),吉林市,吉林省,132012
- 作者简介：
- 基金信息：
- DOI：10.13334/j.0258-8013.pcsee.250607
  CLC：
- Published：2026
- 稿件说明：
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XIN Yechun, MA Zhiqiang, WANG Tuo, et al. Multi-quadrant Power Regulation Capability and Short-term Reactive Power Support Control Strategy for CLCC[J]. 2026, 46(13): 5358-5370.
DOI：

XIN Yechun, MA Zhiqiang, WANG Tuo, et al. Multi-quadrant Power Regulation Capability and Short-term Reactive Power Support Control Strategy for CLCC[J]. 2026, 46(13): 5358-5370. DOI： 10.13334/j.0258-8013.pcsee.250607.

摘要

可控换相换流器(controllable line-commutated converter，CLCC)具有强迫换相能力，利用其辅助支路短时间内多次开断大电流，可拓宽触发角调控区间，能够实现对系统短时功率支撑，对提高系统安全性将具有重要作用。首先，分析了不同触发角下CLCC换相特性及器件承受应力，揭示了短时间内调控CLCC触发角使其发出无功的可行性，建立了触发角在多象限运行下的CLCC准稳态方程；其次，基于不同交流故障程度下CLCC功率与触发角、直流电流的灵敏度特性，考虑CLCC辅助支路避雷器残压和CLCC逆变运行条件，确定了CLCC触发角调控区间；最后，提出了基于触发角补偿的CLCC无功功率支撑控制策略，最大化维持CLCC的直流传输功率。在PSCAD/EMTDC中搭建了CLCC电磁暂态仿真模型，验证了CLCC的多象限功率调控能力以及所提无功支撑策略的有效性。与传统控制方法相比，交流故障期间CLCC无功支撑能力明显提高。

Abstract

The controllable line-commutated converter (CLCC) features forced commutation capability. By leveraging its auxiliary branch to repeatedly interrupt large currents within a short time frame

it can broaden the regulation range of the firing angle

enabling short-term power support to the system and playing a vital role in enhancing system security. Firstly

the commutation characteristics of the CLCC and the stress endured by its components under different firing angles are analyzed. The feasibility of regulating the CLCC firing angle in a short period to generate reactive power is revealed

and the quasi-steady-state equations of the CLCC under multi-quadrant firing angle operation are established. Secondly

based on the sensitivity characteristics of CLCC power to firing angle and DC current under varying degrees of AC faults

considering the arrester residual voltage in the CLCC auxiliary branch and the inverter operation conditions of the CLCC

the regulation range of the CLCC firing angle is determined. Finally

this paper proposes a reactive power support control strategy for the CLCC based on firing angle compensation to maximize the CLCC’s DC transmission power maintenance

and develops an electromagnetic transient simulation model of the CLCC in PSCAD/EMTDC to verify the multi-quadrant power regulation capability of the CLCC and the effectiveness of the proposed reactive power support strategy. Compared with traditional control methods

the reactive power support capability of the CLCC during AC faults is significantly improved.

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