Preventive measure of ferro-resonance for isolated neutral system;
防止中性点不接地系统铁磁谐振的措施
A resonance eliminating method for isolated neutral system;
中性点不接地系统的一种消谐方法
The abnormal voltage of 35kV isolated neutral system is analyzed after the phase I(phase II) of its busbar TV high-voltage fuse is fused,and then the causes are found out,which not only can help the operator determine the similar faults accurately in time,but can help to prevent the undetected faults damaging the potential transformer.
通过对一起35 kV中性点不接地系统母线电压互感器高压熔断器一相(二相)熔断后电压异常的实例现象分析,找出其原因,有利于发生类似故障时运行人员能够准确及时的判断处理,防止长期未发现故障使电压互感器损坏。
This method has successfully solved the difficulity of the single-phase-to-ground fault location for the neutral point ungrounded system owing to the fact that there is no fault current circuit.
该方法成功解决了中性点不接地系统单相接地故障时,由于没有故障电流回路而造成测距困难的问题。
The features of 10kV neutral point ungrounded system and the harm of the capacitance current are analyzed,and the calculation method of capacitance current is introduced.
分析了10kV中性点不接地系统的特点,以及系统对地电容电流超标的危害,给出了电容电流的计算方法,对传统消弧线圈接地系统在运行中存在的问题进行了简要分析,重点阐述了自动跟踪消弧圈成套装置的工作原理和性能特点,以及有关技术参数的选择和配置。
Analysis of single-phase earthing protection in neutral non-grounding system;
中性点不接地系统单相接地保护的分析
Focused on the low protection sensitivity of zero sequence current in neutral unearthed systems,a selection scheme which is adopting zero sequence diffential current as a starting criterion,the line of maximum capatative zero sequence current as a earthing line is proposed.
针对中性点不接地系统的零序电流保护灵敏度较低的缺点,提出了采用零序差动电流起动,取容性零序电流最大的线路作为接地线路的选线方案,该方案可提高中性点不接地系统接地选线的灵敏度,具有一定的实用性。
Neutral non-grounded systems are widely used in power distribution network in china,and the single phase-to-earth fault happens most frequently in this network.
在我6~35kV 配电网中,广泛采用中性点不接地系统,而此系统发生最多的时单相接地故障。
Analysis of unbalance voltage in non-ground neutral system for distributing network;
配电网中性点不接地系统中的电压不平衡现象分析
The discussion of line-to-neutral voltage regularity and judgment of grounded phase when isolated neutral system is nonmetal grounded
中性点不接地系统单相接地时接地相的判断
Phenomenon Analysis on Voltage Unbalance of Neutral Ungrounding System
中性点不接地系统电压不平衡的几种现象分析
The Research of the Device with Overvoltage of Resonance of the System in Ungrounded Neutral Point;
中性点不接地系统谐振过电压消除装置的研究
Detection of Ferroresonance in Neutral Non-Grounding System Based on Decomposition Characteristic of Wavelet Packet;
基于小波包分频特性的中性点不接地系统铁磁谐振检测
Study on On-Line Fault Location for Distribution Networks Based on Wide Area Phase Measurement
基于广域相量测量的中性点不接地系统在线故障定位研究
With normal balanced operation the neutrals of an ungrounded or isolated system are held at ground potential because of the presence of the system capacitance to earth.
正常对称运行时,中性点不接地或绝缘系统的中性点由于系统对地电容的存在而保持地电位。
Discuss on Earthing Protection Scheme in Neutral Grounded with Low-resistance Distributed System
中性点经小电阻接地系统接地保护方案探讨
Introduction to neutral grounding and resistance grounding in distribution system
配电系统中性点接地方式及电阻接地方式
neutral grounding of power system
电力系统中性点接地方式
AC three phase four wire system with neutral earthed
中性点接地的交流三相四线系统
resistance-grounded neutral system
中心点电阻接地系统
The Simulation in Research on Ferroresonance in Grounded Neutral Point;
中性点直接接地系统铁磁谐振的数学仿真
Ferromagnetic Resonance Over-voltage in Neutral-point Indirect Earthing System
中性点非直接接地系统铁磁谐振的产生及措施
The Studies of the Power Energy Metering Method on the Neutral Point Grounded Effectively;
中性点有效接地系统电能计量方法研究
Analysis of transient characteristics of fault generated traveling waves in non-effective grounding system;
中性点非有效接地系统故障行波暂态特征分析
IGBT Based Control System of Neutral-Point Grounding Impedance for Distribution Networks
基于IGBT的配电网中性点接地阻抗控制系统
Discussion on Grounding Way of Iron and Steel Plant's Distribution System Neutral Point Through Low Resistance
浅谈钢铁企业配电系统中性点小电阻接地方式
Increase the Neutral Point of Extinction by the Medium Voltage Distribution Network Alignment Function
浅谈提高中性点经消弧线圈接地系统选线功能
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