| 引用本文: | 于仲安,毕俊强,郭培育,王先敏,陈清.同塔四回输电线路故障选线新方案[J].电力自动化设备,2019,39(11): |
| YU Zhongan,BI Junqiang,GUO Peiyu,WANG Xianmin,CHEN Qing.New fault line selection scheme for four-circuit transmission lines on same tower[J].Electric Power Automation Equipment,2019,39(11): |
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| 摘要: |
| 从参数不对称同塔四回输电线路入手，结合四回线内部存在的线间及相间电磁耦合的特点，分析推导出适合的相模变换矩阵对各回线阻抗进行解耦处理，并且通过仿真对比的方式论证了解耦方法的正确性。基于解耦出的独立模量间的关系，定义4个参数K1— K4，根据这4个参数在不同回路故障时的取值不同，构造新的故障选线判据。大量的PSCAD/EMTDC仿真数据表明，所提出的故障选线方案速度快、简单、可靠，且不受故障距离、过渡电阻以及负荷电流和系统运行方式的影响。 |
| 关键词: 同塔四回线 参数不对称 相模变换 故障选线 仿真 |
| DOI：10.16081/j.epae.201909026 |
| 分类号:TM77 |
| 基金项目:电力传输与功率变换控制教育部重点实验室开放课题资助项目(2015AB03) |
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| New fault line selection scheme for four-circuit transmission lines on same tower |
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YU Zhongan1, BI Junqiang1, GUO Peiyu2, WANG Xianmin1, CHEN Qing2
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1.School of Electrical Engineering Automation, Jiangxi University of Science and Technology, Ganzhou 341000, China;2.Guodian Nanjing Automation Co.,Ltd.,Nanjing 210032, China
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| Abstract: |
| Starting with the four-circuit transmission lines on same tower with parameter asymmetry, combined with the characteristics of interline and interphase electromagnetic coupling in the four-circuit transmission lines, a suitable phase-mode transformation matrix is derived to decouple the impedance of each circuit line. The correctness of the decoupling method is proved by simulation and comparison. Based on the relationship between the decoupled independent modules, four parameters, i. e. K1, K2, K3 and K4 are defined. According to the different values of these four parameters in different circuit faults, a new fault line selection criterion is constructed. A large number of simulative data on PSCAD/EMTDC show that the proposed fault line selection scheme is fast, simple, reliable and unaffected by fault distance, transition resistance, load current and system operation mode. |
| Key words: four-circuit lines on same tower parameter asymmetry phase-mode transformation fault line selection simulation |
