输电线纵联差动保护的新原理

提出了基于贝瑞隆模型的输电线路纵联保护的新原理,与传统的分相电流差动保护比较,该原理不受电容电流的影响,特别适用于超高压和特高压长线路。从原理上详细分析了它能更准确地区分线路内、外故障的原因。仿真结果表明分析是正确的,原理是可靠的。

NOVEL PRINCIPLE OF PILOT DIFFERENTIAL RELAY PROTECTION OF TRANSMISSION LINES

A novel principle of pilot differential relay protection of especial high voltage and ultra high voltage transmission lines based on a Bergeron model is proposed. As compared with traditional current differential protection, the new principle can endure the distributed capacitive current of the line. So it is especially suitable for the long distance especial high voltage and ultra high voltage transmission lines. The theoretical analysis is presented to show how the new principle is of high sensitivity in discriminating between the internal and the external faults of the line. Simulation results confirm that the analysis is correct and the new principle is reliable.