传统保护存在后备保护动作时间过长和不能区分线路过载与故障等不足。
The traditional protection has some shortcomings: long operation time of backup protection, not distinguishing overload from fault of line and so on.
多普勒负反应性反馈效应能在保护动作延迟的时间内将功率限制在可接受的水平。
The negative Doppler effect will limits the power to an acceptable level during the time delay for protective action.
对它们使用的特点，如动作时间、保护范围和通流能力等进行了分析和比较。
The operating characteristics of these methods such as response time, scope of protection and capability of current are analysed and compared with.
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