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提出一种用于超高压和特高压输电线路上的分相方向元件。通过比较故障分量补偿电压和故障前电压的相位,从而判断是否正方向故障。该分相方向元件具有极强的方向性,能反应系统全相、非全相和振荡状态下的各种对称和不对称故障,具有很高的承受过渡电阻的能力。通过各种情况下大量仿真试验证明了此原理的优越性。
A phase separation directional element for EHV and UHV transmission lines is proposed. By comparing the components of the fault compensation voltage and phase voltage before failure to determine whether the positive fault. The split-phase element has strong directivity and can reflect all kinds of symmetrical and asymmetrical faults in all phase, non-phase and oscillation states, and has a high ability to withstand the transition resistance. Through a large number of simulation experiments under various conditions to prove the superiority of this principle.