Performance Analysis and Improvement of Synchronous Firing Control for HVDC Transmission System with AC Faults

WU Qiumei; YU Zhenxiao; FU Chuang; WEN Zhaoxin; ZHENG Ruina; WANG Juanjuan

doi:10.7500/AEPS20220321015

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Performance Analysis and Improvement of Synchronous Firing Control for HVDC Transmission System with AC Faults

Application Research | 更新时间：2025-06-16

- Performance Analysis and Improvement of Synchronous Firing Control for HVDC Transmission System with AC Faults
- Automation of Electric Power Systems Vol. 47, Issue 1, Pages: 183-191(2023)
- 作者机构：
  
  1. 华南理工大学电力学院,广东省广州市 510641
  2. 直流输电技术国家重点实验室(中国南方电网科学研究院有限责任公司),广东省广州市 510663
  3. 云南电力调度控制中心,云南省昆明市 650011
- 作者简介：
- 基金信息：
  
  Abstract:
  In order to solve the bipolar commissioning problem of high voltage direct current (HVDC) transmission projects while the construction of conventional earth electrodes are not completed, the unconventional earth electrode operation schemes, including in-station deep electrodes and out-station simple electrodes, are introduced. Then the electrical performance of electrodes, human safety, electrode heating, DC bias of transformers and diverting potential are studied. The main conclusions are as follows: in-station deep electrode schemes are technically feasible, but isolating measures should be taken to avoid high induced DC potential of earthing grid endangering the safety of equipment and human, for out-station simple electrode schemes, the step voltage and electrode temperature rise requirements are difficult to meet in monopole operation mode. So unbalanced current control measures should be introduced to ensure the safety of equipment and human near electrodes.
  Foundation:This work is supported by National Natural Science Foundation of China(51777079);Guangdong Provincial Natural Science Foundation of China(2020A1515011541);Joint Funds for Smart Grid from State Grid Corporation of China(U1766213)
- DOI：10.7500/AEPS20220321015
  CLC：
- Received：21 March 2022，
  
  Revised：2022-04-22，
  
  Published Online：20 October 2022，
  
  Published：10 January 2023
- 稿件说明：
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吴秋媚,余震霄,傅闯等.交流故障下高压直流输电系统同步触发控制性能分析及改进[J].电力系统自动化,2023,47(1):183-191.

WU Qiumei,YU Zhenxiao,FU Chuang,et al.Performance Analysis and Improvement of Synchronous Firing Control for HVDC Transmission System with AC Faults[J].Automation of Electric Power Systems,2023,47(1):183-191.
吴秋媚,余震霄,傅闯等.交流故障下高压直流输电系统同步触发控制性能分析及改进[J].电力系统自动化,2023,47(1):183-191. DOI： 10.7500/AEPS20220321015.

WU Qiumei,YU Zhenxiao,FU Chuang,et al.Performance Analysis and Improvement of Synchronous Firing Control for HVDC Transmission System with AC Faults[J].Automation of Electric Power Systems,2023,47(1):183-191. DOI： 10.7500/AEPS20220321015.

摘要

高压直流控制系统通过同步触发控制实现对换流器的控制作用。文中分别从同步和触发2个环节对2种具有代表意义的同步触发控制原理进行详细介绍，其中一种的特色是在同步环节采用环前滤波器进行谐波滤除和不平衡处理，触发环节为等间隔触发，以SIEMENS同步触发控制为代表；另外一种的特色是在触发环节含有辅助触发控制和触发角限制，同步环节无环前滤波器，以ABB同步触发控制为代表。然后，对2种同步触发控制在交流故障下的性能进行分析和对比，并将2种同步触发控制的特点进行结合，提出了改进型同步触发控制，建立了其小信号模型。最后，进行了阶跃响应仿真对比和交流故障测试，仿真测试结果验证了改进系统抑制后续换相失败的能力更强，同时验证了改进方向的正确性。

Abstract

The control function of the high voltage direct current (HVDC) control system to the converter is realized by synchronous firing control. This paper describes two representative synchronous firing control principles in detail from the two links of synchronizing and firing. One of them has the characteristics that harmonic filtering and unbalance processing are carried out by the prefilter in the synchronizing link

and the firing link is equal-interval firing

which is represented by the SIEMENS synchronous firing control. The other has the feature that the firing link contains auxiliary firing control and firing angle limitation

and the synchronous link has no prefilter

which is represented by the ABB synchronous firing control. Then the performances of two types of synchronous firing control are analyzed and compared under AC faults. The characteristics of two types of synchronous firing control are combined

and an improved synchronous firing control is proposed. Then its small-signal model is established. Finally

the step response simulation comparison and AC fault test are carried out. The simulation and test results verify that the improved system has a stronger ability to suppress subsequent commutation failures

and the improvement direction is corrective.

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references

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