| 引用本文: | 王婷,刘渊,李凤婷,等.光伏T接高压配电网电流差动保护研究[J].电力系统保护与控制,2015,43(13):60-65. |
| WANG Ting,LIU Yuan,LI Fengting,et al.Research on the current differential protection where PV access to the high voltage distribution network with T-type[J].Power System Protection and Control,2015,43(13):60-65 |
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| 摘要: |
| 分析了光伏电站故障电流的特性，研究了两个目前常用电流差动保护判据应用在光伏T接线路上存在的问题。研究结果表明，传统T接线路差动保护判据不能同时满足内部故障的灵敏性和外部故障的可靠性。结合光伏电源故障电流特点，提出了适合于光伏T接线路电流差动保护的综合判据。对改进后的判据进行了大量的仿真试验，仿真结果表明，该判据能满足区内故障时的灵敏性和区外故障时的可靠性，并且具有很强的抗过渡电阻的能力。 |
| 关键词: 光伏 T接线路 电流差动保护 综合判据 |
| DOI：10.7667/j.issn.1674-3415.2015.13.009 |
| 分类号: |
| 基金项目:国家自然科学基金项目(51267019，51367017）;国家电网科技项目(52272713039Y) |
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| Research on the current differential protection where PV access to the high voltage distribution network with T-type |
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WANG Ting1, LIU Yuan1,2, LI Fengting1, JIA Yanzheng3, HE Shien4, LI Yuqiang1
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1.Engineering Research Center of Education Ministry for Renewable Energy Power Generation and Grid Technology,
Xinjiang University, Urumqi 830047, China;2.State Grid Changji Power Supply Company, Changji 831100, China;3.State Grid Hami Power Supply Company, Hami 839000, China;4.Wind Power Technology Center,
Gansu Electric Power Corporation, Lanzhou 730050, China
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| Abstract: |
| The characteristic of fault current of photovoltaic power is analyzed. Research on the problems that two traditional criterions of current differential protection used in photovoltaic T-type line has done and results show that traditional criterions cannot simultaneously meet the sensitivity and reliability. Combining with the characteristic of fault current of photovoltaic power, a synthesis criterion of current differential protection suitable for photovoltaic T-type line is proposed. A lot of simulation has done and simulation results show that the synthesis criterion can not only satisfy the sensitivity and reliability but also has a strong resistance to the fault resistance. |
| Key words: photovoltaic power T-type line current differential protection synthesis criterion |
