电气控制 罗风立:电缆线路电流速断保护原理及整定计算 中图分类号:TQ172.6 文献标志码:B 文章编号:1007-0389(2017)03-58-04【D0I】10.13697j.cnki.32-1449/tu.2017.03.024 电缆线路电流速断保护原理及整定计算 罗风立(中信重工工程技术有限责任公司河南洛阳471039) 摘要:本文就工厂企业中常见的6kV及10kV电缆线路保护误动原因进行分析,以电流速断保护理论为依据,阐述了保护误 动的原因,并结合实例说明保护定值计算中应注意的问题,对电气设计及运行人员在实际的保护配置和整定计算中具有借鉴 意义. 关键词:线路保护;瞬时电流速断;限时电流速断;容量;供电;配电网络 Principle and setting calculation of current quick breaking protection for cable line Luo Fengli(CITIC Heavy Engineering Technology Co. Ltd.Luoyang 471039 China) Abstract:In this paper the protection maloperation of mon 6 kV and 10 kV cable line protection malfunction is analysed and ac- cording to current quick break protection theory the reason of misoperation is expounded.And bined with examples the problems that we should pay attention to in calculation of protetion setting value are explained which can be used as a reference for the electrical design and operation personnel in the actual protection configuration and setting calculation. Key words:line protection;instantaneous current quick break;limited current quick break;capacity;power supply:distribution network 0前言 2线路保护原理 6kV及10kV电缆线路是现代工厂企业主要的 2.1微机型线路保护装置中的保护配置 电能输送方式,其特点是输送距离短,回路数多,线 目前,在各电力设备上,微机型保护装...
第38卷第13期 电力系统保护与控制 Vol.38 No.13 2010年7月1日 Power System Protection and Control Jul.1 2010 电动机磁平衡式差动保护的整定计算 李斌,范瑞卿,贺家李 (天津大学电力系统仿真控制教育部重点实验室,天津300072) 摘要:传统纵联差动受电流互感器饱和特性的影响,实际应用中可能出现误动的情况.在与传统纵联差动保护相比较的基础 上,分析研究了电动机磁平衡式差动保护的工作原理及性能特征.通过对电动机正常运行、起动、以及区内外故障的分析, 给出了磁平衡式差动保护的整定原则.研究表明磁平街式差动保护能够大大提高电动机保护的灵敏性和可靠性. 关键词:电动机;纵联差动保护;磁平衡式差动保护;电流互感器;中性点不接地系统 Setting calculation of magnetic balanced differential protection of motor LI Bin FAN Rui-qing HE Jia-li (Key Laboratory of Power System Simulation and Control of Ministry of Education Tianjin University Tianjin 300072 China) Abstract:Affected by saturation characteristics of current transformer traditional differential protection may mis-operate sometimes. Based on the analysis of traditional differential protection this paper introduces a novel magnetic balanced differential protection. According to the investigation of normal operation start and external or internal fault for motor the paper researches the performance of magnetic balanced differential protection.Furthermore the setting principle is proposed.Theoretical research and industrial application show that magnetic balanced differential protection can improve sensitivity and relia...
研究与开发 PESEARCH AND DEVELOPMENT 铁路 计算机应用 第21卷第9期 RALWAY COMPUTER APPLICATION Vol.21 No.9 文章编号:1005-8451(2012)09-0018-03 牵引供电系统继电保护整定 计算软件的开发 李良威,邓云川,林宗良 (中铁二院工程集团有限责任公司电化院,成都610031) 摘要:本文研究并开发出一套牵引供电系统继电保护整定计算软件.在不同系统运行方 式、不同牵引变压器接线形式、不同牵引网供电方式和不同保护配置方案算法的基础上,结合 各铁路局对继电保护的运营要求以及各设备厂商的设备装置算法的区别,使用VC与面向对 象编程技术,缩短了系统开发周期,提高了工程分析计算的效率.软件的开发为牵引供电系统 的设计提供了技术支持. 关键词:牵引供电;VC;继电保护;整定计算 中图分类号:U223 文献标识码:A Development of setting calculation software for relay protection of Traction Power Supply System LI Liang-wei DENG Yun-chuan LIN Zong-liang Electrification Design Institute China Railway Eryuan Engineering Group Co.LTP. Chengdu 610031 China) Abstract:In this paper it was introduced the setting calculation software of the relay protection which was based on the analysis of the running mode for diverse system traction transformer connection form the feeding mode of overhead contact line system and protection configuration scheme at the same time it was also integrated the railway administration's requirements to the relay protection as well as the difference of device algorithm among different equipment manufacturers.Through using the VCprogram language and the object-oriented programmin...
第42卷第10期 电力系统保护与控制 Vol.42 No.10 2014年5月16日 Power System Protection and Control May16 2014 煤矿井下高压电网过流保护整定计算方法的改进研究 马星河1,李林蔚,李自强2,韩鹏举3 (1.河南理工大学电气工程与自动化学院,河南焦作454150;2.许继电气股份有限公司,河南许昌461000; 3.中国平煤神马集团安全监察局,河南平顶山467000) 摘要:为了提高煤矿过流保护的可靠性,针对各级变电所6kV出线开关,给出了一种改进的过流保护整定计算方法.分析 了传统方法的不足,并详细介绍了新方法的整定计算过程.新方法中用线路载流量对定时过流与过负荷保护进行了整定,并 介绍了瞬时速断保护是否设置的判定方法.以定时过流保护为例,介绍了灵敏度不合要求时的处理方法.最后以河南大有能 源某煤矿局部供电系统为例进行了计算论证,并进行了分析.结果表明,新方法是有效和实用的,能够保证过流保护装置可 靠动作,从而提高过流保护的可靠性. 关键词:过流保护;改进的;整定计算;新方法;载流量;灵敏度;有效 Improvement and research on the setting calculation method of overcurrent protection of the underground high-voltage distribution network of coal mine MA Xing-he' LI Lin-wei' LI Zi-qiang? HAN Peng-ju (1.Dept of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo 454150 China;2.XJ Electric Co. Ltd Xuchang 461000 China;3.Safety Supervision Bureau of China Pingmei Shenma Group Pingdingshan 467000 China) Abstract:In order to improve the reliability of overcurrent protection of coal mine for 6 kV outlet switch of substation of all levels this paper gives an improved setting calculation method of overcurrent protection.It analyses the shortings of traditional method and introduces...
62 煤矿机电 2015年第4期 周晓东,丰胜成,郭志强,杨晋伟.煤矿井下高低压开关整定值计算与分析[].煤矿机电,2015(4):62-65. doi:10.16545/j.cnki.cmet.2015.04.018 煤矿井下高低压开关整定值计算与分析 周晓东,丰胜成,郭志强,杨晋伟 (潞安集团李村煤矿,山西长治046600) 摘要:煤矿供电为一类负荷,供电的可靠稳定对煤矿安全至关重要.目前国家对煤矿开关整定 计算没有统一标准,各个煤矿整定都不尽相同,而按电力系统整定方式整定对煤矿供电又并不适 用.对此根据多年的经验,对井下高低压开关整定值进行了分析计算,所得出的整定值在李村煤矿 应用后满足了矿井的供电要求. 关键词:电流保护;电压保护;漏电保护;非电量保护 中图分类号:TM773 文献标识码:B文章编号:1001-0874(2015)04-0062-04 Calculation and Analysis of High/Low Voltage Switch Setting Value at Underground Mine Zhou Xiaodong Feng Shengcheng Guo Zhigiang Yang Jinwei Licun Mine Lu'an Group Lu'an 046600 China) Abstract:The power supply in coal mine is the first class load.The reliability and stable of the power supply plays an important role for coal mine safety.There is no national standard for the calculation of mine switch setting and the setting calculation is different in each coal mine.However the setting method in power system are not suitable for the coal mine power supply.According to the experience in many years calculates and analyzes the setting value of high/low voltage switch at underground mine then gets the setting value.Applies the value in Licun mine it proves that the method can satisfy the power supply requirements. Keywords:current protection;voltage protection;leakage protection;non-electrical protection 整定值设置不当的情况,导致有时保护出现误动和 0引言 拒动情况,影响到矿井的安全生产.本文从实际应 煤矿井下供电主要由高压隔爆开关、低压馈电 用出发,分析了如何正确计算开关整定值,以供研究 开关、电磁启动器、电缆等组成,由于煤矿环境恶劣, 探讨. 井下开关经常发生短路、过负荷、漏电等故障,因此 1电流保护 《煤矿安全规程》中规定井下开关应装设有短路、过 负荷、漏电保护等,这些保护对矿井安全供电起...
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...