使用与维护 第31卷2013年第1期(总第163期) 发变组保护及并网整定计算 陈晓云罗志敏 (唐钢设备机动部唐山063016) [摘要]介绍了发电机和变压器分别装设单独的纵联差动保护,以提高系统的可靠性及保护的灵敏度,详 述了发电机和变压器的主保护和后备保护的整定计算以及并网整定计算,确保了工程顺利投运和良好稳定的运 行状况. [关键词]发变组保护整定计算主保护后备保护双电源 Generator-transformer Unit Protection and Grid-connected Setting Calculation CHEN Xiao-yun LUO Zhi-min (Equipment and Mechanical-Power Department of Tangshan Iron Steel Co. Ltd. Tangshan 063016) 【Abstract】The generator and the transformer are equipped with a longitudinal differential protection separately to improve the system reliability and protection sensitivity.Describe in detail the setting calculation of grid-connected and the main and backup protection for the generator and the transformer to ensure that they are put into operation smoothly and kept in a stable operation. 【Key words】Generator-transformer unit protection setting calculation main protection backup protection dual power supply 发电机-变压器组(简称发变组)中当发电机升压变在35kV分别并网于1号和2号110kV变电 与变压器之间没有安装断路器时,发电机与变压站.采用发电机-变压器组单元接线,发电机与变 器将保持为成组单元运行.不论是发电机的短路压器之间没有安装断路器.以1号40MW发电机 故障、主变压器的短路故障还是厂用高压变压器 来介绍发变组的继电保护整定计算.系统单线图 的短路故障都必须停机处理.在这种接线情况 如图1所示,系统参数如下: 下,作为保护配置和事故跳闸出口应把它们视作 (1)发变组35kV母线最大最小等值阻抗为 一个扩大的元件进行保护设计. X=2.3217 Xm=3.0329;基准电流I准=19.6...
关键词:单电源;辐射状电网;保护整定 中图分类号:TM774文献标识码:A文章编号:1672-9706(2011)增刊-0040-06 SingleSupplyRadial Grid35kVSubstationProtectionSetting CalculationMethod LIU Yang (Mengcheng power supply pany,Mengcheng 233500,China) Abstract;Relay protection is related to the power grid safety and reliable operation,while the protection setting calculation is one of the most crucial links.According to the basic situation and the existing prob- lems of 35kV substation relay protection setting value calculation of county class power supply pany, the single supply radial grid 35kV substation relay protection setting calculation method of county class power supply pany is introduced, in order to provide some references for other peers. Key words:single supply; radial power network; protection setting 0引言 县级供电公司单电源辅射状电网由于结构较为简单,且35kV变电所主变容量普遍不大,故其线路 保护主要采用电流速断和定时限过电流两段过流保护。
内蒙古电力技术 6 INNER MONGOLIA ELECTRIC POWER 2015年第33卷第3期 doi:10.3969/j.issn.1008-6218.2015.03.021 内蒙古电网继电保护一体化整定计算系统的开发与应用 乔宇峰,戴成龙,毛启欣,单广忠 (内蒙古电力(集团)有限责任公司调度控制中心,呼和浩特010020) 摘要:内蒙古电网原继电保护整定计算系统功能简单,没有统一的数据平台,使得中调、 地调形成信息“孤岛”,而且整定计算基础数据以及定值单管理不规范.针对内蒙古电网的实 际情况,开发了继电保护一体化整定计算系统.该系统在中调服务器上部暑数据库服务器, 构建统一的数据平台,保证了数据的一致性,其功能模块包括图形建模、故障计算、整定计算、 信息管理等.实际应用中,该系统实现了中调、地调的一体化联合计算功能,有效提高了继电 保护整定计算的工作效率和计算精度,也为提升继电保护定值管理水平提供了有效手段. 关键词:内蒙古电网;继电保护一体化整定计算系统;图形建模;网络分区算法;工程整定 文献标志码:B 中图分类号:TM727;TM769 文章编号:1008-6218(2015)03-0006-04 Development and Application of Relaying Integrated Setting Calculation System in Inner Mongolia Power Grid QIAO Yufeng DAI Chenglong MAO Qixin SHAN Guangzhong (Inner Mongolia Power(Group)Co. Ltd.Power Dispatch and Control Center Hohhot 010020 China) Abstract:The function of former relay setting software was simple in Inner Mongolia power network.It was an information island without a data platform between central and region dispatching department.Meanwhile the management was not standard in basic data and setting book of relay setting process.This paper developed the Integrated relay setting system based on the reality of Inner Mongolia power system.The database was located in the central dispatching department which made the system a integrated data platform. Modeling fault calculation setting and management consists of the main five parts of this system.In practical application central and region dispatching department bined relay setting calculation was realized.I...
第34卷第3期 四川电力技术 Vol.34 No.3 2011年6月 Sichuan Electric Power Technology Jun. 2011 关于低压电网用电设备继电保护整定计算的探索 宋其,宋汉蓉,尹秦 (德阳电业局,四川德阳618000) 摘要:在10kV及以下系统中,继电保护配合时限级差较少,供电级数多,按照常规的继电保护整定原则编制一套合 理的保护整定方案,满足保护“四性”的要求有很大难度.而10kV系统的供电可靠性影响千家万户用电客户,影响 电力系统的优质服务和经济效益.所以正确、灵活运用保护整定计算原则,保证10kV及以下系统安全、稳定、可靠运 行非常重要,针对1kV线路、电弧炉变压器、电动机、电容器等供电设备的保护配置和整定计算,提出解决办法. 关键词:低压电网;保护;整定计算 Abstract:In 10 kV system and below the time-limit grade of relay protection matched is insufficient but the grade of power supply is vast.It is hard to draw up a rational protection program and satisfy the protection requirements of“four features'"ac- cording to the normal setting principle of relay protection.The power supply reliability of 10 kV system will affect millions of customers and affect the quality of service and the economic benefits.So it is very important to use the principle in a right and flexible way to ensure the safe stable and reliable operation of 10 kV system and below.Aiming at the protection alloca- tions and setting calculations of supply apparatus such as 10 kV lines are furnace transformers electric motors and capaci- tors the measures are put forward to settle the above mentioned problems. Key words:l...
第二十卷增刊安徽电气工程职业技术学院学报2015年5月 Vol. 20,Supplement JOURNAL OF ANHUI ELECTRICAL ENGINEERING PROFESSIONAL TECHNIQUE COLLEGE May 2015
一种大规模电网继电保护整定计算新思路
王同文,田宏强 (国网安徽省电力公司调控中心,安徽合肥230022) 摘要:提出一种适用于大规模电网继电保护整定计算新思路,旨在提高计算效率。
关键词:大规模电网;继电保护;整定计算;分区技术 中图分类号:TM771文献标识码:A文章编号:1672-9706(2015)增刊-0001-05
NewMethodforLarge ScalePower Grid RelayProtection Setting Calculation WANGTong-wen,TIANHong-qiang (Dispatch & Control Center,State Grid Anhui Electric Power Corporation,Hefei 230022,China) Abstract:In order to improve the efficiency,a new partitioning algorithm for large scale power grid relay protection setting calculation is proposed in the paper. Under the restriction of the objective area number and the least boundary branch, the method provides the optimal partitioning results based on the power system figure. Both the within detailed power grid model and area boundary information are gained by u- sing breadth-first algorithm, and then the several subset models are obtained. Finally the relay protection setting calculation is analyzed in the smaller power system figure. The technology overes both the cal- culation efficiency and the multi-dimension matrix problem for large power system setting calculation, and also offers the backup protection coordination relation between boundary branches and the exact branch coefficient. The application results on Anhui area power grid show its validity. Therefore as a partitioning method for large power grid setting calculation, it has high engineering value. Key words:large scale power grid;relay protection; setting calculation; partitioning technology
0引言 在继电保护整定计算过程中,通常只建立本区域电网的详细模型,相邻区域采用等值模型简化处 性。
技术与应用 一次6kV厂用电系统 接地的故障分析及整定计算 余芳王文志 (深圳广前电力有限公司,广东深圳518051) 摘要通过一次6kV高压厂用系统发生单相接地故障时启备变和高厂变分支零序过流保护均 拒动的实际案例,提出启备变高厂变分支零序过流保护在整定计算时,不仅需要按照相关规程和 标准规定的方法进行整定计算,面且要结合现场实际情况和一次接线方式进行深入研究.针对忽 略容性电流、考虑停机状态时的容性电流和开机状态时的容性电流3种运行方式,用Multisim软件 仿真计算出故障电流,并与实际故障电流比对,总结出故障电流的分布特征,提出了3种定值整定 方法,分析了各方法的优缺点,选择出最佳方案,确保了保护动作的正确性,达到了优化保护定 值,提高保护动作可靠性的目的. 关键词:厂用电;零序保护;接地故障;故障分析;整定计算;仿真 Fault Analysis and Setting Calculation on the 6kV Ground Fault Yu Fang Wang Wenzhi (Shenzhen Guangqian Electric Power Co. Ltd.Shenzhen Guangdong 518051) Abstract Through the practical case of branch zero sequence over-current protection of start up/standby transformer and HV station transformer refuse operation when 6 kV ground fault happening this article points out that the setting calculation not only needs to ply with the relative regulations and standardized methods but also should bine with the status quo and the primary connecting mode.It puts forward three different situations to calculate fault current using Multisim software.In parison with actual figures it summarizes distribution characteristics of fault current chooses the best proposal which ensures the correctness of protection optimizes the pro...
第43卷第9期 电力系统保护与控制 Vo1.43No.9 2015年5月1日 Power System Protection and Control May1 2015 750kV变压器保护配置及整定计算探讨 张健康1,粟小华1,夏芸2 (1.国家电网西北电力调控分中心,陕西西安710048;2.北京中恒博瑞数字电力科技有限公司北京100096) 摘要:750kV电网作为西北地区主网架目前正处于快速发展期.结合750kV变压器特点,分析了差动保护与各 侧后各保护的配置原则及应注意的问题.考虑到750kV变压器差动保护配置较为完备,明确变压器区内故障主要 依靠差动保护切除,而后备保护主要用于反应本侧母线及线路出口故障.协调区外出口附近故障的灵敏性、快速 性与选择性的矛盾是变压器后备保护整定计算的关键.在此基础上,提出了750kV变压器保护的整定方案,并就 阻抗保护适用性、差动保护完善、后备保护简化及变压器保护自动整定等问题进行了探讨.本方案已在西北750kV 变压器保护中获得应用. 关键词:750kV变压器;差动保护;后备保护;阻抗保护;整定计算 Discussion on protection configuration and setting calculation for 750 kV transformer ZHANG Jiankang' SU Xiaohua' XIA Yun2 (1.Northwest Electric Power Dispatching and Control Sub-center of State Grid Xi'an 710048 China; 2.Join Bright Digital Power Technology Co. Ltd. Beijing 100096 China) Abstract:750 kV grid as the main grid of Northwest China is now in rapid development period.On the basis of the characteristics of 750 kV transformer the protection configuration and its related problems are analyzed.Considering that the differential protectionl of 750 kV transformer is quite perfect the internal fault is mainly dependent on the differential protection to remove and the backup protection is primarily responsib...
机电工程技术2013年第42卷第07期 电力电网 D0I:10.3969/j.issn.1009-9492.2013.07.022 35kV环网运行线路继电保护整定计算方案分析 邓文祥,相里碧玉,万顺明,林辉 (南平电业局,福建南平353000) 摘要:分析了有环网运行的福建南山变35kV电网的结构、设备状况,概括了整定计算的运行方式、主要原则.在对本电网整 定过程中遇到的“整定顺序、边界限额、时间级差、相继动作、电流Ⅱ段时间、电流Ⅲ段值”等问题,分析了存在的原因,提 出有效的应对措施和解决方法.论证了该片电网继电保护整定方案的合理性和可行性. 关键词:继电保护;环网运行;整定计算;方案 中图分类号:TM77 文献标识码:A文章编号:1009-9492(2013)07-0077-03 Analysis of Relay Protection Coordination Solutions for 35kV Closed-Loop Running Power System Network DENG Wen-xiang XIANG LI Bi-yu WAN Shun-ming LIN Hui (Nanping Electric Power Bureau Nanping353000 China) Abstract:The construction state of equipment operation and setting principle of the 35kV Closed-loop Running power system were introduced.The cause and solutions of such as the sequence of coordination setting limit differential time limit sequential tripping time ofⅡstages current and current setting ofⅢstages were analysed.Through effeetive analyse and explain the solutions of relay protection of the 35kV Closed-loop Running power system was rational and practicable. Key words:relay protection:closed-loop running;coordination and putation;solutions 0引言 1南山片区35kV电网示意图 我国山区电网还在大量采用35kV电压等级 示意图如图1所示. 送电,35kV电网为中性点不接地系统,线路保护 2设备状况 主要配置为电...