frequency protection

Several typical problems existing in site test of relay protection are pointed out, such as test with load, channel test of high frequency protection, remote trip function test of optical protection.

针对现场试验中带负荷检查存在的问题、高频保护中通道问题、光纤保护中远跳功能应注意的问题等，指出应特别关注的问题。

Analysis and Treatment of High Frequency Protection Mulfunction Caused by Secondary Intermittent Fault

二次间歇性故障引起高频保护误动事例分析与处理因那次事故而饱受惊吓

Analysis in effects to high frequency protection command transmission time in carrier wave channel

浅析高频保护命令载波通道传输时间的影响

But the connection of wind power makes the districts show a typical character of week feed system which forms a great test for system relay protection especially in high frequency protection of which one line can falsely trip two times.

但风电的接入使得该地区电网呈现出典型的弱馈系统特点，这使得系统继电保护面临很大的考验，尤其作为高频保护，现场曾发生过同一条线路两次误动的现象。

Analysis of Causes for Mishandling of WXB-11 Microcomputer High frequency Protection

WXB-11型微机高频保护误动原因分析

This paper discusses the influence of line distribution capacitance on high frequency protection for directional negative phase-sequence and impedance elements, i. e. phase fault element and earth fault element.

本文将讨论线路分布电容对负序方向高频保护和阻抗元件（相间故障和接地故障元件）的影响。

Analysis of the Operation Current of the Phase Difference High Frequency Protection

对相差高频保护操作电流的分析