理论分析与仿真验证都证明新原理不受长线路分布电容电流的影响，具有很高的灵敏性和可靠性。
Theoretical analysis and simulation prove that the proposed protection principle will not be affected by distributed capacity current of transmission line and has higher sensitivity and reliability.
发电机带长线路甩负荷时，因容性电流对发电机产生助磁作用从而使发电机发生自励磁和过电压。
Self-excitation and over-voltage caused by generator load rejection with long lines occurs because of the capacitive current has a function to help the magnetic excitation of the generator.
特高压长线路可能在线路中间接入并联电抗器，从而有效补偿线路电容电流，抑制空载线路过电压。提出了在特高压长线路中间带并联电抗器时的线路分相电流差动保护原理。
Shunt reactor could be installed in the middle segment of the UHV transmission line, in order to compensate capacitive current of transmission line and limit over-voltage of line without load.
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