| 引用本文: | 翟文辉,田晓煜,亢朋朋,陈帅,孔嘉靖,贾科.基于光伏故障暂态出力控制及容量计算的自适应重合闸方法[J].电力自动化设备,2025,45(9):96-102. |
| ZHAI Wenhui,TIAN Xiaoyu,KANG Pengpeng,CHEN Shuai,KONG Jiajing,JIA Ke.Adaptive reclosing method based on PV fault transient output control and capacity calculation[J].Electric Power Automation Equipment,2025,45(9):96-102. |
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| 摘要: |
| 保护跳闸后，其他线路的光伏电源可能带故障持续运行，给故障点馈流并导致瞬时性故障无法熄弧，引发重合闸失败。为此，提出一种基于光伏故障暂态出力控制及容量计算的自适应重合闸方法。分析了故障电弧特性并提出电弧电阻线性化的等效方法，在此基础上明确了光伏电源容量对电弧特性的影响，进而计算了光伏暂态出力下电弧满足自熄的边界条件，通过控制光伏故障期间的暂态出力避免瞬时性故障无法熄弧导致重合闸失败的问题。仿真验证表明所提方法对于不同位置、过渡电阻的瞬时性故障都能有效防止其电弧无法自熄，提高新能源发电系统供电可靠性。 |
| 关键词: 自适应重合闸 分布式光伏 光伏暂态出力 新能源孤岛系统 |
| DOI：10.16081/j.epae.202505004 |
| 分类号: |
| 基金项目:国家电网有限公司科技项目(SGXJ0000TKJS2310434)；国家重点研发计划项目(2022YFB4202302) |
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| Adaptive reclosing method based on PV fault transient output control and capacity calculation |
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ZHAI Wenhui1, TIAN Xiaoyu1, KANG Pengpeng1, CHEN Shuai2, KONG Jiajing2, JIA Ke2
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1.State Grid Xinjiang Electric Power Company, Urumqi 830018, China;2.State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
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| Abstract: |
| After the protection trip, the photovoltaic(PV) power sources on other lines may continue to operate with faults, feeding current to the fault point and causing transient faults that cannot extinguish the arc, leading to a failure of the reclosing operation. Therefore, an adaptive reclosing method based on PV fault transient output control and capacity calculation is proposed. The characteristics of fault arc are analyzed and an equivalent method for linearizing arc resistance is proposed. Based on this, the influence of distributed PV capacity on arc characteristics is clarified, and the self-extinguish boundary conditions of arc under the PV transient power output are calculated. By controlling the transient output during PV faults, the problem of reclosing failure caused by transient failure can be avoided. Simulation verification shows that the proposed method can effectively prevent the arc from self-extinguish failing automatically for transient faults of different positions and transition resistances, and improve the power supply reliability of new energy system. |
| Key words: adaptive reclosing distributed PV PV transient output new energy island system |
