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同杆双回线同序负序方向保护方案中弱馈拒动缺陷的改进

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针对同序负序方向保护中的起动问题,分析了同序负序弱馈现象产生的原因,以及传统的同序负序纵联方向保护方案存在的缺陷,提出了一种利用反序负序分量的改进方案。采用实例进行仿真,结果表明采用反序负序分量可以有效地减小系统阻抗的影响,耐过渡电阻能力强,确保保护装置准确起动,适合应用在带弱馈系统的同杆双回输电线。
Improvement on Same Directional Negative Sequence Directional Protection to Avoid Miss Operation Due to Weak-infeed for Double-circuit Transmission Line
For starting problem of same directional negative sequence directional protection, the paper analyzes the cause of same directional negative sequence weak-infeed phenomenon and the defect of traditional protection, and proposes a novel starting criterion based on inverse directional negative sequence component. The simulation results show that the principle can weaken the influence of system resistance and not be affected by fault resistance to start, and it has strong adaptive ability for weak-infeed system of double-circuit transmission line.

parallel transmission lines on the same towerstartinglongitudinal directional protectioninverse directional negative circuitsystem resistance

司泰龙、郭其一、田羽

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同济大学电信学院电气工程系,上海201804

上海电力设计院有限公司,上海200025

同杆双回线 起动 纵联方向保护 反序负序电流 系统阻抗

2012

能源技术
上海市能源研究所 上海市工程热物理学会

能源技术

影响因子:0.301
ISSN:1005-7439
年,卷(期):2012.33(4)
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