| 引用本文: | 丁媛媛,刘天琪,周胜军,乔光尧,李兴源,王文慧.双回并行直流输电谐波不稳定判据研究及改进[J].电力自动化设备,2017,37(1): |
| DING Yuanyuan,LIU Tianqi,ZHOU Shengjun,QIAO Guangyao,LI Xingyuan,WANG Wenhui.Study and improvement of harmonic instability criterion for parallel double-circuit HVDC transmission lines[J].Electric Power Automation Equipment,2017,37(1): |
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| 摘要: |
| 现代电网往往是大规模的交直流混联系统，当直流系统与弱交流系统连接时，可能引发谐波不稳定等一系列问题。在现有双回并行直流输电线路谐波不稳定判据的基础上，引入了直流偏磁系数和双回直流线路的阻抗矢量差异，提出新的判断双回直流系统谐波不稳定的工程判据。在不同网络参数下，将所提判据与现有判据的判断结果进行对比分析，结果证明了所提判据的正确性。 |
| 关键词: 高压直流输电 谐波不稳定 工程判据 双回并行 开关函数 |
| DOI：10.16081/j.issn.1006-6047.2017.01.025 |
| 分类号: |
| 基金项目:国家电网公司科技项目(SGRIDL7114006) 发明专利：一种双回并行高压直流输电系统谐波不稳定的判定方法(2014103157989) |
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| Study and improvement of harmonic instability criterion for parallel double-circuit HVDC transmission lines |
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DING Yuanyuan1, LIU Tianqi1, ZHOU Shengjun2, QIAO Guangyao2, LI Xingyuan1, WANG Wenhui1
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1.School of Electrical Engineering and Information, Sichuan University, Chengdu 610065, China;2.State Grid Smart Grid Research Institute, Beijing 102211, China
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| Abstract: |
| Since modern power grid is usually a large-scale AC / DC hybrid system, a series of problems such as harmonic stability may occur when DC system is connected to a weak AC system. An improved engineering criterion based on the existing harmonic instability criterion for the parallel double-circuit HVDC transmission lines is proposed, to which the DC magnetic bias of converter transformer and the impedance vector difference between two DC circuits are introduced. The comparison of judgment among the proposed and existing criterions verifies the correctness and practicability of the proposed criterion. |
| Key words: HVDC power transmission harmonic instability engineering criterion parallel double-circuit lines switching function |
