| 引用本文: | 李 欢,傅 闯,辛清明,代书龙,赵晓斌.高压直流输电系统直流谐波阻抗的解析计算及谐振分析研究[J].电力系统保护与控制,2022,50(19):67-79.[点击复制] |
| LI Huan,FU Chuang,XIN Qingming,DAI Shulong,ZHAO Xiaobin.Analytical calculation of DC harmonic impedance and DC resonanceanalysis of an HVDC transmission system[J].Power System Protection and Control,2022,50(19):67-79[点击复制] |
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| 摘要: |
| 研究了常规高压直流输电系统直流回路谐波谐振问题。采用解析计算的方法，对典型高压直流输电系统的直流回路谐波阻抗进行数学建模。基于状态空间模型得到了直流谐波阻抗的解析表达式，形成了直流回路阻抗频谱，并通过PSCAD软件对所提模型进行了验证。分析了系统各环节参数与直流谐波阻抗的耦合关系。提出了采用调整控制参数实现直流回路谐振宽频抑制的方法，并通过电磁暂态仿真对所提方法进行了验证。结果表明，所提方法可有效提升高压直流系统的直流谐振抑制能力和安全稳定运行水平。 |
| 关键词: 高压直流 直流谐波阻抗 解析计算 谐振分析 |
| DOI：DOI:?10.19783/j.cnki.pspc.211629 |
| 投稿时间：2021-12-01修订日期：2022-06-07 |
| 基金项目:国家自然科学基金项目资助(51777079)；南方电网科技项目资助(ZBKJXM20190056) |
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| Analytical calculation of DC harmonic impedance and DC resonanceanalysis of an HVDC transmission system |
| LI Huan,FU Chuang,XIN Qingming,DAI Shulong,ZHAO Xiaobin |
| (State Key Laboratory of HVDC, CSG Electrical Power Research Institute, Guangzhou 510663, China) |
| Abstract: |
| In this paper, the DC loop harmonic resonance of a conventional HVDC system is studied. An analytic calculation method is used to establish the mathematical model of the DC loop harmonic impedance of an LCC HVDC system. Based on the state-space model, an analytical expression of the DC harmonic impedance is derived. The DC loop impedance spectrum is then formed and verified by PSCAD simulation. The coupling relationship between the HVDC parameters and the DC harmonic impedance is analyzed. Finally, a method to suppress broadband resonance of the DC loop by adjusting control parameters is proposed and verified by electromagnetic transient simulation. The results show that the proposed method can effectively suppress the DC resonance of the HVDC system and ensure the secure and stable operation of the system.
This work is supported by the National Natural Science Foundation of China (No. 51777079). |
| Key words: high voltage direct current direct current harmonic impedance analytical calculation resonance analysis |
