电压互感器二次回路,secondary circuit of potential transformer
1)secondary circuit of potential transformer电压互感器二次回路
1.In a certain power plant,after an automatic air switch insecondary circuit of potential transformer of 6kV auxiliary working bus section of No.论述了某电厂#7机组6 kV厂用工作段电压互感器二次回路自动空气开关跳闸后,由分散控制系统(DCS)逻辑判断为厂用段失压跳开厂用6 kV电源开关,在工作段失压切换过程中,瞬间失电使运行中的给煤机跳闸,导致主燃料切断保护(MFT)动作,最终造成了机组与系统解列的故障。
英文短句/例句
1.Automatic compensation equipment for PT secondary voltage drop电压互感器二次回路压降的自动补偿装置
2.Causes analysis and improvement measures for excessive error of voltage drop in secondary circuit of voltage transformer电压互感器二次回路压降超差原因分析和改造措施
3.Research on selection of secondary parameter of current transformer and voltage transformer电流互感器、电压互感器二次参数选择问题研究
4.The Secondary Circuit Voltage Drop Mechanism of Voltage Transformers and Improved Schemes;电压互感器二次线路压降的产生机理及治理措施
5.Cause Analysis on Higher Secondary Voltage of Capacitor Voltage Transformer电容式电压互感器二次电压偏高的原因分析
6.Hazards of Open Secondary Circuit of Current Transformer and Corresponding Countermeasures电流互感器二次侧开路的危害及对策
7.Analysis of Overload Current in a Current Transformer and Secondary Terminal Voltage电流互感器过载电流及二次端子电压分析
8.Study of Dynamic Compensaing Equipment of the Secondary Voltage Drop of Voltage Transformer;电压互感器二次压降动态补偿装置的研究
9.Development of Dynamic Compensator of PT Load电压互感器二次负荷动态补偿器的研制
10.Research on the Travelling-wave Fault Location System Based on Secondary Signal of TV;基于电压互感器二次信号的行波定位系统研制
11.Research for the Neutral Point Protection Measures of Voltage Transformer’s Secondary Windings电压互感器二次绕组中性点保护措施研究
12.The Analysis and Disposal of 500 kV Capacitor Voltage Transformers Secondary Voltage Abnormality Condition500kV电容式电压互感器二次电压异常状况的分析与处理
13.Secondary Side Connection and Its Correctness Test of Main Transformer Current Circuit主变压器电流回路TA二次接线及其正确性测试
14.The Secondary Circuit Voltage Analysis and Test Method for the Fault of Losing of CVT in Service运行中的电容式电压互感器二次失压故障分析和试验方法
15.The Influences and Analyses about PT Secondary Voltage Drop Caused by Energy Meter"s Neutral Point Virtual Connection电能表中性点虚接对电压互感器二次压降的影响分析
16.The typical design and application of secondary circuit for high voltage breaker in 110～500kV substation in SGCC国家电网公司110～500kV变电站高压断路器二次回路典型设计及应用
17.Influence of Incorrect Connections for Voltage Transformer on Metering Devices and Preventative Measures电压互感器二次接线错误对计量装置的影响及防范措施
18.Voltage transformersGB1207-1997电压互感器
相关短句/例句
secondary windings of PT电压互感器二次绕组
3)secondary voltage loop二次电压回路
1.PTsecondary voltage loop weakness tache and improvement measurePT二次电压回路薄弱环节及改进措施
4)secondary voltage loss电压二次回路失压
1.By analyzing the reasons ofsecondary voltage loss when energizing a new power transformer, the principle error in the voltage switchover circuit is found out and remedy measure is proposed.介绍了一起扩建工程在500kV新变压器充电时220kV侧电压二次回路失压的事故。
5)secondary voltage circuit fault二次电压回路故障
1.The paper analyzes the effects and influences on relay protection due to fault of PT secondary voltage circuit and summarizes thier causes and harms,and puts forward the strategy of managing PTsecondary voltage circuit fault to improve the security of electric power net.PT二次电压回路对变电站二次系统的正常运行起着重要作用,PT二次电压回路故障会引起继电保护装置的误动作或拒动。
6)Secondary voltage drop of the potential transformerPT二次回路电压降
延伸阅读
电力系统电压互感器谐振过电压电力系统电压互感器谐振过电压resonance overvoltage due to potential transformer in electric power system南定理，可将三相对地电容等效连接在电撅变压器和互感器的两个中性点之间，由此着出，谐振属于零序性质。无论是电源合闸至空载母线所引起的电压互感器的涌流现象，还是线路中发生对地闪络和熄弧后C。中残余电荷经电压互感器放电所引起的磁饱和现象，都会在一定的C0值下激发起谐振过电压，它表现为电力系统中性点发生位移，并全部反映至开口三角形绕组，引起虚幻的接地故障信号。这是配电网中造成故障最多的一种内部过电压. 图1中性点不接地系统中三相电压 互感器接线图和等效谐振回路(a)三相电压互感导接线图;(b)等效谐振回路由于谐振的零序性质，导线的相间电容、余弦电容器和传愉的三相有功负荷均对谐振不起作用。随着C。的增加(即导线增长)，将依次发生高频、工频和分频谐振。在很短的空母线合闸时，C0很小，会产生3倍以上的高频谐振过电压。较大的c0则会出现工频谐振过电压，此时一相对地电压很低，其它两相的对地电压接近于线电压，故工频谐振和单相接地现象往往难以区别。当母线上的出线较长时，C。很大将会发生分频谐振，其频率略低于电源颇率的一半，电压表的指针会发生低频摆动，谐振电压分t和开口三角形电压接近于相电压，由于此时谐振频率和相应的励磁感抗减半，互感器趋于深度磁饱和，励磁电流急剧增大，高达额定值的数十倍以至百倍以上，从而造成互感器的发热、喷油以至爆炸。在高频和分频谐振时，三相对地电压同时升高。可以通过两种途径来抑制上述谐振现象.其一是采取阻尼吸能措施，即在开口三角形绕组两端临时并接一个低值电阻(在6一10kV小电网中，可用200~50ow的白炽灯泡)或将互感器高压中性点经大电阻接地。其二是破坏谐振条件，即人为地增大对地电容使之超过某一临界值，或将开口三角形绕组临时短接，或将互感器高压中性点临时不接地，或将电网改为通过消弧线圈接地。d旧nl一x一tongd旧nyo hugonq一x旧zhen guod{anyo电力系统电压互感公谐振过电压(resonanceovervoltage due to potential transformer inelectrie power system)电磁式电压互感器由于铁芯磁饱和引起的铁磁谐振过电压。在中性点不接地和直接接地电力系统中均有可能发生.中性点不接地系统中电压互感器的谐振过电压图1中电源变压器的中性点不接地，电压互感器的中性点直接接地，其励磁电感La、L。和Lc分别与导线和母线的对地电容C。相并联而形成谐振回路。
