| 引用本文: | 陈亚,李梦诗.基于瞬时能量比的输电线路故障选相方案[J].电力系统保护与控制,2016,44(1):56-64. |
| CHEN Ya,LI Mengshi.A faulted phase selection scheme for transmission lines based on instantaneous energy ratio[J].Power System Protection and Control,2016,44(1):56-64 |
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| 摘要: |
| 提出了一种新的电力系统输电线路的故障选相方案。该方案首先构造了电流、电压信号的一种虚拟的瞬时能量；然后利用电流与电压的瞬时能量的比值构成瞬时能量比，作为故障选相的指标；最后将这些指标值与相应的阈值作比较完成故障选相。在PSCAD/EMTDC搭建了一个典型的双端供电的电力系统模型对所提出的方案进行仿真验证。仿真结果表明，所提出的故障选相方案能够在不同的故障电阻、故障位置和故障初始角等故障情况下正确地完成故障选相，并且具有响应速度快、抗高斯白噪声、抗高过渡电阻等优点。 |
| 关键词: 故障选相 瞬时能量比 PSCAD/EMTDC 高斯白噪声 抗高阻 |
| DOI：10.7667/j.issn.1674-3415.2016.01.008 |
| 分类号: |
| 基金项目:国家自然科学基金(青年基金，51307062) ; 广东省自然科学基金(博士启动基金，S2013040016964) |
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| A faulted phase selection scheme for transmission lines based on instantaneous energy ratio |
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CHEN Ya, LI Mengshi
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School of Electric Power, South China University of Technology, Guangzhou 510640, China
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| Abstract: |
| This paper proposes a new faulted phase selection scheme for transmission lines in power systems. The proposed scheme originally develops a virtual instantaneous energy for the current and voltage signals; then utilizes the ratio of the instantaneous energy of current to that of the voltage as an index for phase selection; finally compares the indexes with their corresponding thresholds to select the faulted phases. A typical double source-supplied power system is established in PSCAD/EMTDC to verify the proposed scheme. The simulation results have demonstrated that the proposed method can select the faulted phases correctly under different fault conditions such as different fault resistances, fault locations and fault inception angles. Moreover, it has a considerable fast respond speed to a fault, is immune to white Gaussian noise and tolerant of high fault resistances. |
| Key words: faulted phase selection instantaneous energy ratio PSCAD/EMTDC white Gaussian noise tolerant of high resistances |
