74 煤矿机电 2011年第5期 煤矿井下127V照明线路保护整定的计算方法 王惠东 (淮南矿业集团公司潘一矿,安徽淮南232082) 摘要:针对煤矿井下127V照明线路易着火、碳化自燃等现象,对其照明线路综合保护器二次 侧保险管的选择、线路电缆截面及保护距离等高度重视.阐述127V照明线路保护整定计算方法, 并提出超过电缆最长保护距离的解决措施. 关键词:保险管;电缆截面;保护距离;整定计算 中图分类号:TD623 文献标识码:B 文章编号:1001-0874(2011)05-0074-02 Research on Coal Mine 127 V Illuminating Line Protection Setting Calculation WANG Hui-dong (Panyi Mine Huainan Mining Group Co. Ltd. Huainan 232082 China) Abstract:In view of the phenomena such as easy to catch fire and carbonized spontaneous bustion of 127 V illuminating line at underground coal mine the majority mine pits to the 127 V illuminating line synthesis protector two sides protective tube's choice the line electric cable section and the protection distance are being taken seriously.The protection installation putational methods of 127 V illuminating line are introduced and the solution measures of over electrical longest protection distance are proposed. Keywords:protective tube;electric cable section;protection distance;setting calculation 式中:Ig——照明灯负荷电流,A; 0引言 Pxm—装灯最多的一相的装灯容量W; 淮南矿业(集团)公司下属煤矿都是高瓦斯矿 U一—额定电压,U=133V; 井,瓦斯爆炸、突出等灾害发生的可能性都比较高, c0s中=0.6. 其中井下127V照明线路由于电压低,经常发生着 127V照明电缆长时允许工作电流见表1. 火、碳化自燃等问题,严重威胁井下生产的安全.对...
htto:/.cqvip. 经验与探讨 湖南电力 第28卷/2008年第3期 湘潭电厂新机组失磁保护整定计算方案 陈剑 (湖南省电力公司试验研究院,湖南长沙410007) 摘要:结合发电机失磁时状态特征及微机保护的组态特点,建立了失磁保护2段时限 的保护动作逻辑.根据逻辑框图需要的动作判据单元,分别对机端或系统电压判据、励磁 低电压判据、静稳阻抗圆1判据、静稳阻抗圆2判据进行了整定计算分析并得到实际整定 过程和结果. 关键词:发电机失磁保护;励磁电压;系统电压;动作逻辑;整定计算 中图分类号:TM772文献标识码:A文章编号:1008-0198(2008)03-0044-04 Setting calculation scheme for loss of excitation protection of new unit in Xiangtan power plant CHEN Jian Hunan Electric Power Test Research Institute Changsha 410007 China) Abstract:Based on state characteristics of generator losing excitation and AREVA microputer protection configuration feature protection operation logic of excitation losing protection in two stage time limits was established.According to operation criterion unit required by logic chart generator terminal or system voltage criterion excitation low voltage criterion No.1 static stability circle criterion and No.2 static stability circle criterion were setting caleulated and the practical setting process and result were obtained. Key words:generator losing excitation protection;excitation voltage;system voltage;operation logic;setting calculation 1引言 本身只提供相对独立的判据模块,需要整定人员对 判据模块进行逻辑组态,才能形成一个完整的保护 发电机失磁会导致发电机电势降低和静稳破 整定...
机电工程技术2014年第43卷第09期 电力电工 DOI: 10. 3969 / j. issn. 1009-9492. 2014. 09. 016 海岛电网多重环网运行继电保护整定计算方案分析 林峰,张兰英',吕庭钦',相里碧玉2 (1.国网福州供电公司,福建福州350009;2.国网南平供电公司,福建南平353000) 摘要:电网环网或电磁环网运行能提高电网供电可靠性及经济性,但同时使得继电保护整定计算复杂化.结合平潭海岛多重环 网运行特性,提出了一套继电保护整定计算方案.分析了该电网继电保护整定计算遇到的运行方式选择、整定原则、整定顾 序、保护配合死循环、保护或开关拒动和重合闸等问题与解决措施.该方案的实施提高了线路保护适应电网多变运行方式的能 力,减小了现场修改定值或保护切区的工作量.海岛电网的安全稳定运行表明该整定方案的合理性与可行性. 关键词:电磁环网:环网运行;继电保护;整定计算;重合闸 中图分类号:TM277文献标识码:A文章编号:1009-9492(2014)09-0059-05 AnalysisofRelayProtectionSettingCalculationSchemefortheIsland PowerGridMulti-LoopOperation LIN Feng' ZHANG Lan-ying' LV Ting-qin' XIANG LI Bi-yu² (1.State Grid Fuzhou Electric Power Supply Company Fuzhou350009 China; 2.State Grid Nanping Electric Power Supply Company,Nanping353000 China) Abstract: Grid closedloop unning or eletromagnetic loop network operation can improve power supply reliability and ecnomy while it makes relay protection setting calulation licated at the same timeAccrding tothePingtan island gri multiloop peration put forward ascheme of relay protection setting calculation The problems and meaures of the power grid are analyzed such as peratin mode seletion setting principl,setting orderprtetioncoordinatonndlessloop,protection orwitchfaure recosing. The scheme can mrove the ability of line protetion to adap tvarius operationmdereduces the worklod ofmodifyingxed vale r switching fixed valeareaSfe nd stabe operatin fthePintan isnd power id shows the ratnalityand feasiilty f seting sch Key words: electromagnetic looped network; closedloop running: relay protection; setting calculation; reclosing 0引言 或现场切区的工作量大.为了让线路保护定值能 地区3kV~110kV电网宜采用环网布置、开 适用于电网多变的运行方式,本文结合福建平潭 环运行的方式".但由于电网建设过渡期间造成的 海岛电网多重环网运行的实际情况,分析了该电 网架结构不够坚强或由于恶劣的自然环境影响, 网继电保护整定计算遇到的运行方式选择,整定 电网的供电可靠性低,在保证电网安全稳定运行 原则,整定顺序,保护配合死循环,保护或开关 的前提下,常将地区电网环网或电磁环网运行. 拒动,重合闸等问题与解决措施.海岛电网的安 电网环网或电磁环网运行能提高电网供电可靠性 全稳定运行表明本文所提保护整定方案的合理性 及经济性,但同时带来继电保护整定计算复杂 与可行性. 化、功率转移造成线路过载、短路电流变化、无 1电网概况 功环流等问题. 福建平潭海岛电网多重环网运行示意图,如 多重环网运行的电网,常因设备检修或故障 图1所示.该电网结构较薄弱,仅由一...
资htrp://.oqvip. 第28卷/2008年第2期 湖南电力 经验与探讨 母线保护及其整定计算若千问题探讨 曾次玲1,曾勤2,谢培元1,李丽莎2 (1.湖南省电力公司调度通信局,湖南长沙410007;2.湖南省电力公司娄底电业局,湖南娄底417000) 摘要:比较了WMH-800 WMZ-41 RCS-915 BP-2B CSC-150 SGB750等 几种湖南电网在运的微机母线保护装置的原理和解决TA饱和等问题方面的不同方法, 详细分析了不同型号母线保护在整定计算方面的异同点和需要注意的细节问题. 关键词:继电保护;母线差动;整定计算 中图分类号:TM773文献标识码:A文章编号:1008-0198(2008)02-0041-05 Discussion on bus protection and its setting calculation ZENG Ci-ling' ZENG Qin? XIE Pei-yuan' LI Li-sha (1.Hunan Electric Power Company Dispatches and Communication Bureau Changsha 410007 China; 2.Loudi Electric Power Bureau Loudi 417000 China) Abstract:The principles adopted by several microputer based bus protection equipment in Hunan power grid and.their ways to settle TA saturation were pared.Same and different points and detail concems that should be pay attention in differ ent type bus setting calculation were thoroughly analyzed. Key words:relay protection;bus differential protection;setting calculation 1引言 2母线保护的基本原理介绍 目前,湖南220kV及以上电网继电保护装置2.1母线差动保护原理 中线路保护基本实现了微机化、双重化配置,元件 母线差动保护的动作原理是建立在基尔霍夫电 保护也正在向全面微机化过渡.湖南省母线保护主流定律的基础之上的.把母线视为一个节点,在正 要来自南瑞、南自、许继和四方四大厂家.截止常运行和外部故障时流入母线电流之和为,而内 2007年6月,南瑞的RCS系列(母差、失灵、充部短路时为总短路电流.这是理想的情况,实际 电)40套左右,南自的WMZ...
80 《电气开买》(2013.No.4) 文章编号:1004-289X(2013)04-0080-04 咸宁地区110kV微机主变保护整定 计算原则的优化实践 凌艳,刘杰 (湖北电网咸宁供电公司,湖北咸宁437100) 摘要:从咸宁电网实际情况出发,提出了110kV微机主变保护整定计算的简化原则和优化方案.为继电保护 工作者在整定计算环节中通过分析规程并结合保护特性研究简化计算方法提供了策略性的建议,对确保电网运 行安全可靠、减少误整定、提高工作效率具有实际意义. 关键词:变压器保护;110kV;整定计算;简化与优化 中图分类号:TM41 文献标识码:B Optimization and Predigesting of the Setting Calculation Principle of 110kV Microputer Protection in Xianning Area LING Yan LIU Jie (Hubei Power Grid Xianning Power Supply Co Xianning 437100 China) Abstract:According to the real conditions of Xianning Power Grid the calculation principles and the methods of solving some special problem in relay protection setting are introduced.Analyze and advance the optimization and predigesting of the setting calculation principle of 110kV microputer protection.It would be a strategic advice for the relay protection operators to predigest the calculation method passing through analysis of the regulations and the study of protection char- acteristic in the setting calculation teach.It takes practical meaning on insure power network operation on the safe side. reduce mistake calculation and boost work efficiency. Key words:protection of transformer 110kV setting cal...
关键词:整定计算;缓冲网;运行方式;带权电力网络;保护配合 Automatic generation of buffer subsystemfor setting calculation in large power system WANG Xiao-bo', WEN Jing-hua², LI Chong-zhan, LUO Mei-ling, SONG Wei, GONG Ren-min? (1. School of Electrical and Electronic Engineering, North China Electric Power University, Baoding 071003, China; 2. Ningxia Electric Power Dispatching and Control Centre, Yinchuan 750001, China; 3. Beijing Join Bright Digital Power Technology Limited Company, Beijing 100096, China) Abstract: It is time consuming to use the entire network to conduct setting calculation for local area. The way to narrow down the grid size for setting calculation bees an important subject.Based on the plex network theory, the weighted power network model is formed. The buffer subsystem for setting calculation consists of the coordination region and constraint region. After determining the scope of seting calculation, we include the adjacent branches of boundaries and its end nodes in the coordination region according to remote backup protection.Furthermore, the shortest electrical path is used to determine the minimum ring network of boundaries and coordination branches. Meanwhile the substation scope is determined by the self-impedance variation rate of boundary nodes. The constraint region consists of the smallest ring structures and substation scope. Under these, the depth first search and backtracking technique are applied to form the buffer subsystem automatically. Key words: seting calculation; buffer subsystem; operation mode; weight...