| 引用本文: | 宋璇坤,申洪明,黄少锋,韩柳,肖智宏.特高压分布电容对电流差动保护的影响分析及对策[J].电力自动化设备,2018,(1): |
| SONG Xuankun,SHEN Hongming,HUANG Shaofeng,HAN Liu,XIAO Zhihong.Effect of distributed capacitance on differential current protection and relevant countermeasures[J].Electric Power Automation Equipment,2018,(1): |
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| 摘要: |
| 在全球能源互联网的背景下，特高压输电技术迅速发展。特高压线路的分布电容对电流差动保护会产生不利影响，因此详细分析了分布电容对电流差动保护影响机理，并进一步分析了不同故障形式下动作电流的相角特征，进而提出了基于动作电流相角信息的电流差动保护动作逻辑。仿真结果验证了所提逻辑可以有效避免分布电容对差动保护产生影响。 |
| 关键词: 能源互联网 特高压输电 分布电容 继电保护 电流差动保护 相角 |
| DOI：10.16081/j.issn.1006-6047.2018.01.025 |
| 分类号:TM77 |
| 基金项目: |
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| Effect of distributed capacitance on differential current protection and relevant countermeasures |
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SONG Xuankun1, SHEN Hongming1,2, HUANG Shaofeng2, HAN Liu1, XIAO Zhihong1
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1.State Grid Economic and Technological Research Institute Co.,Ltd.,Beijing 102209, 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: |
| The UHV(Ultra-High Voltage) power transmission technology is rapidly developing under the background of global energy internet. Since the distributed capacitance in the UHV power transmission line has a negative effect on the differential current protection, the effect is analyzed in detail as well as the phase angle information of operating current under different faults, based on which a kind of operating logic based on the phase angle information of operating current is proposed for differential current protection. The simulative results verify that the proposed logic can effectively avoid the effect of distributed capacitance on the differential current protection. |
| Key words: energy internet UHV power transmission distributed capacitance relay protection differential current protection phase angle |
