第42卷第7期 电力系统保护与控制 Vol.42 No.7 2014年4月1日 Power System Protection and Control Apr.1 2014 发电机失步保护整定计算所用的等值联系电抗Xcon研究 —与现行《大型发电机变压器继电保护整定计算导则》商榷 张项安,姚晴林,陈海龙 (许继电气股份有限公司,河南许昌461000) 摘要:现行《大型发电机变压器继电保护整定计算导则》有关发电机失步保护整定计算中发电机机端与无限大系统间的等值 联系电抗Xn的计算公式欠妥,值得商榨.对此问题进行深入分析,得出发电机失步保护整定计算中所用的X正确的计算 方法.并在同一系统振荡工况下依照该计算方法所得的Xo值与依照《导则》的计算方法所得的X.值进行对比分析,分析 结果表明:《导则》的整定计算方法极可能导致失步保护拒动,而所提整定计算方法能确保失步保护可靠动作. 关键词:失步保护;发电机失步保护;联系电抗;系统电抗 Research on equivalent contact reactance Xcon setting calculation for generator out-of-step protection -discuss with Guide of Calculating Settings of Relay Protection for Large Generator and Transformer ZHANG Xiang-an YAO Qing-lin CHEN Hai-long (XJ Electric Co. Ltd Xuchang 461000 China) Abstract:The calculation formula of equivalent reactance Xoon between generator and infinite system for generator out-of-step protection in the current "Guide of Calculating Settings of Relay Protection for Large Generator and Transformer"is improper it is questionable.This paper has researched this problem deeply and obtained the correct method of the Xoon setting calculation for generator out-of-step protection and pared the Xcon values calculated by the proposed calculation method an...
第40卷第5期 电力系统保护与控制 Vol.40 No.5 2012年3月1日 Power System Protection and Control Mar.1 2012 发电厂继电保护整定计算系统的智能化研究 赵冬梅,张旭,刘燕华,张虹,安永桥 (华北电力大学电气与电子工程学院,北京102206) 摘要:对发电厂继电保护整定计算系统的智能化进行了研究,提出了面向操作的智能化设计思路.以人工操作最小为原则, 采用图形文件识别实现了全自动图形建模,通过“数据一公式一保护装置模板一实例”多层知识结构构建了智能整定计算模块, 使用模式匹配方法完成了整定结果与外部定值单无格式约束的直接对应.基于多层知识结构构建了较为完备的知识库,开发 了一套兼具智能性与通用性的发电厂继电保护整定计算智能系统.系统已在某火力发电厂得以应用,效果良好 关键词:整定计算;智能化;图形文件识别;多层知识结构;模式匹配 Research on intellectualization of power plant relay protection setting calculation system ZHAO Dong-mei ZHANG Xu LIU Yan-hua ZHANG Hong.AN Yong-qiao (School of Electrical and Electronic Engineering North China Electric Power University Beijing 102206 China) Abstract:This paper studies the intellectualization of the power plant relay protection setting calculation system and puts forward the ideas of operation-oriented intelligent design.On the principle of the least manual operation adopting graphic file identification technology it has achieved full-automatic graphics modeling through a multi-layer knowledge structure of“data-formula-relay protection device template-example" constructed the intelligent setting calculation module.And using pattern matching method it has finished direct co...
中图分类号:TM621文献标志码:B文章编号:1671-9913(2011)05-0038-03 OverCurrentSettingCalculationforIning andBusTieBreaker inLVMutual StandbyAuxiliaryPowerSystemofPowerPlants PAN Lu,QIN Peng,FU Chu-qiao (Central Southern China Electric PowerDesign Institute,Wuhan 430071, China) Abstract:Combining with the two operation modes of LV mutual standby connection auxiliary power system in fossil fuel power plants,the over current setting caleulationfor ining and bus tie breaker is analyzed in this paper. Key words:LVauxiliary power system;mutual standby connection;over current; setting calculation. 1概述电动机起动电流之和(A);Io为最大一台电 关于断路器过电流脱扣器整定电流的计算动机的起动电流(A):1为除最大一台电 公式,在《火力发电厂厂用电设计技术规定》动机外,其他电动机计算工作电流之 (DL/T5153-2002)附录Q中有详细介绍。
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。