Electrical relays part 13 biased percentage differential relays 电气继电器第13部分带制动的比率差动继电器
Principle of pilot differential relay protection of transmission line with series compensated capacitor 有串补电容输电线纵联差动保护原理
Application of fiber current differential relays in electrical power system of shanxi wanjiazhai yellow river diversion project 光纤电流纵差保护在引黄工程供电系统中的应用
The differential relay compares the currents and picks up when there is a difference in the two , which signifies a fault in the zone of protection 差动继电器对电流进行比较,如果存在不同则表示受保护区域内有故障存在。
A differential relay is a protective device that is fed by current transformers located at two different series points in the electrical system 差动继电器作为保护装置,差动继电器由位于系统中两个不同位置的电流互感器提供反馈信息。
Differential relay a differential relay is a protective device that is fed by current transformers located at two different series points in the electrical system 差动继电器作为保护装置,差动继电器由位于系统中两个不同位置的电流互感器提供反馈信息。
How to discriminate between internal fault and magnetizing inrush current is the difficulty of transformer protection when apply differential relay 变压器主保护选择差动在原理上存在不足,带来的问题就是如何准确鉴别励磁涌流与内部故障,这也是目前变压器保护的难点。
Firstly , the paper introduced the commonly hardware configure of microcomputer relaying and the function of every module of industry controlling computer std90386 . secondly , the paper introduced several types busbarprotection which was commonly installed on electric power system and the characteristic of mv or lv system with low current grounding . based on it , the paper put forwards the theory of percentage - restraint differential relay . after that , in the discussing every problems of the relaying working the paper put the emphasis on the negative effect of the ct saturation and countermeasure 本文首先介绍了微机保护装置的一般硬件配置以及作为装置硬件平台的std90386工控机各组件模板的功能,然后分析了目前电网系统装设的母线保护的各种类型以及中、低压小电流接地电网的特点,在此基础上分析、介绍了作为本保护动作原理的“比率制动式差动保护”原理。