protection n. 1.保护,保卫,防御,掩护,包庇,照顾 (from; against)。 2.保护者,防护物 (against); 〔美俚〕(歹徒向人索取的)保护费。 3.护照,通行证;〔美国〕(国籍)护照;通行证。 4. 【经济学】保护贸易制,保护政策。 protection against cold 防寒用具。 protection against moths [lightning] 除虫,避(雷)。 protection at halts 驻军警戒。 protection on move 行军警戒。 under the protection of 在…保护下,受…保护,托…照顾。
computer protection system of power transmission line based on can field bus 总线的电力线路微机保护系统
Talking about the computer protection and integrated auto-system in transformer substation 浅谈变电所的微机保护和综合自动化系统
Actualize monitor-control and protect all sorts of parameters in the mini-computer protection system 实现了对微机保护中各种参数的监控、保护。
Can bus is the one of the prospectest field bus, at present, it is generally accepted in the world, the distributed mini-computer protection system is the development direction from now can总线是目前国际上公认的最有前途的现场总线之一,分布式微机保护系统是微机保护今后的发展方向。
The feature of electric computer protection, remote controlling and communications technology are analyzed, and special requests of long tunnel and the emphases of remote controlling technology are also analyzed 分析了在供配电领域微机保护、远程控制中各种不同控制算法和通信技术的采用和特点。并且分析了特长隧道的特殊要求和远程监控的技术重点。
Firstly, the reliability ofmicro computer protection is analyzed and calculated according to theory . at thesame time, the reliability of backup protection device for transformer with self-examis estimated by constructing state-module 文章在微机保护可靠性方面进行了较为深入的理论分析与计算,构造了状态空间模型,为带自检的变压器后备保护装置的可靠性作出了估算。
Today with the exploitation of the new tecknologies such as dsp, gps etc . and with the application of the advanced theories such as autoadjustment, wavelet transform etc . the digital computer protection is developing very quickly . in this paper, i presented a new scheme of using dsp to project protection hardware 湖南人学心力系统及几0动化专业几八级血1卜学位论义在微机保护方兴未艾的今大,随着dsp、gps等新技术的开发和自适应、小波变换等理论的应用,微机保护已经取得日新月异的进展。
Based on the dsp56807 chip of motorolacompany, this paper proposes a designing scheme of backup protection device fortransformer, which includes measuring, protection and communication etc . the reliability of micro computer protection, protection algorithm of microcomputer and designing of device are studied in this paper 文章以motorola公司的dsp56807芯片为核心,提出了集测量、保护、控制、通信等功能于一体的变压器后备保护装置设计方案。论文主要研究了微机保护的可靠性、微机保护算法以及变压器后备保护装置的设计。
At the same time, we have discovered some bug in cooperate between the two type protection, analyzed different result in different condition as config with different logic protection, show that the incorrect relay act result from these bug only appear when line is in incompletely phase operation and occur fault, furthermore the mass computer protection have comprehensive incompletely phase logic, so this condition can not seriously threaten the power system 同时,也发现了两种保护装置在配合上存在一些缺陷,分析了这种逻辑上的不配合在不同情况下所造成的不同后果,并且指出由于这些缺陷所造成的保护装置不正确动作的情况仅在线路非全相运行时又故障的情况下才可能出现,而且现有的成套微机保护的都具有较为完善的非全相逻辑,在保护装置正常投运的情况下,还不致对系统安全构成重大隐患。
For current misoperation cause of microcomputer relay protection, the paper introduces the technology of scattered arrangement protection to improve anti-inteferance ability, the usage of computer digital communication technology to enhance fault diagnostic function of micro computer protection device and outside circuit and decrease bad contact of contactor and terminal which may cause ralay misoperation, establishment of electrical protection remote management network to realize maintenance under condition 针对目前微机保护不正确动作的原因,提出了采用保护分散布置技术,提高抗干扰能力;应用计算机数字通信技术,增强微机保护装置及外联回路的故障诊断功能及减少接点和端子接触不良引起的保护不正确动作因素;建立电网保护管理远程网络,实现“状态维修”。