以同名相跨线接地故障为例，分析同杆并架带弱馈线路的特征及其对继电保护的影响；
The paper analyzes the character of the fault between two same lines on double-circuit transmission line and the influence on line 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。
This paper presents that the protection for the phase to phase fault should be composed of high frequency teleprotection channel and overreached distance relay.
文中以跨线并接地的横向故障和接地故障线的一侧断路器断开后的复杂故障为例阐明了该算法的原理。
With an example of two lines short and grounding fault, and one side of breaker of grounding fault line being cut off, the paper illustrates the principle of this calculation method.
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