This paper presents that the protection for the phase to phase fault should be composed of high frequency teleprotection channel and overreached distance relay.

提出只有将高频通道、超范围距离元件配合构成允许式纵联距离保护，才能保护同杆双回线跨线不接地故障。

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This paper analyses the rule of variations measuring impedance of distance relay when phase to phase fault occurs between two lines on double circuit line on the same pole (DLSP).

从理论上分析了同杆并架双回线跨线不接地故障时距离继电器测量阻抗的变化规律。

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Based on phase component model of transmission line, a method to calculate inter-line fault occurred in parallel circuits on same tower is proposed by use of phase component method.

基于输电线路的相分量模型，提出了利用相分量法对同杆并架线路上的跨线故障进行计算的方法。

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