浅谈继电保护选择的应用指导毕业外文翻译.doc

　　浅谈继电保护选择的应用指导毕业外文翻译 浅谈继电保护选择的应用指导毕业外文翻译导读：NrangetoprovidethepleteIntegratedProtection,SupervisionandRemoteControlofElectricalPosthereforeprovidefullSCADAfunctionforElectricalPoents,Alarms,DataLoggingan 英文翻译(译文) 英 文 名 称Application guide for the choice of protective 中 文 名 称 继电保护选择的应用指导 学 生 姓 名 学 号 系、年级专业 电气工程系、10电气工程及其自动化 指 导 教 师 职 称 2014年 1 月 20 日 Application guide for the choice of protective relays 1. INTRODUCTION Protective Relays are the brain of the electrical apparatus. In this respect, their choice is a critical step in the The selection of protective devices is based on: ? The safety of personnel and equipment (sensitivity of detection and response time). ? The quality and continuity of the electrical supply (fault determination, special directional protection, automatic transfer and fast clearing times to improve/ensure system stability). The optimization of the po’s reliability and safety dictates the use of independent stand-alone relays located close to the poe cases, improvements in the overall protection performance are possible by transmitting the relay status to a remote location (knoportant to ensure that these additional functions do not jeopardise the inherent integrity In recent years, technological progress has led to the use of microprocessors in protective relay manufacture. This has led to: ? A significant increase in the amount of information that is processed by the relays. ? Easy calculation of electrical quantities such as harmonics. ? Secure and reliable exchange of digital information ote locations. ? Continuous monitoring of protection relay integrity by self-supervision and auto-diagnostics. CEE have developed the PRO range of digital protection relays, the above advantages entation units, AMS local PLCs and PMG. It is therefore possible, by selecting the appropriate bination of units, to define a plete circuit breaker local management system including Protection, Automat