zero-sequence

For an ungrounded neutral low voltage power system in mine, its insulance ( r), capacitance ( C) and leakage resistance ( R) to the ground are three important parameters in determining the zero sequence voltage.

对于中性点不接地的矿井低压电网，其对地绝缘电阻r，电容C和漏电电阻R，是决定零序电压的3个重要参数。

Key words: low current earth electrical network, transient earth fault, zero-sequence energy, energy variation.

关键词: 小电流接地电网, 间歇性电弧接地故障, 零序能量, 能量变化.

Basic Analysis on U_0 and I_0 Polarity Relation of Zero Sequence Direction Power Components

浅析零序功率方向元件U0和I0极性关系

Aiming at CDMA communication system, spreading sequence has perfect correlation properties only within the bound of synchronized error, Low/ Zero correlation zone ( LCZ/ ZCZ) was proposed.

针对准同步CDMA通信系统，只要求扩频序列在同步误差范围内（一个或几个码片周期）具有和接近理想相关特性，提出了低/零相关区。

It can also used for zero-sequence current measurement and single phase ground protection.

也可用于电缆线路 零序电流 测量和单相接地保护.

A novel principle of negative-sequence current compensation based adaptive zero-sequence over-voltage protection is therefore proposed.

该文提出一种新的基于负序电流补偿的自适应 零序 过电压保护原理.

Design of Zero-sequence Current Transformer with High Performance

高性能零序电流互感器的设计

In order to greatly enhance the zero-sequence current active component during the single-phase ground fault, the short-time switch and the resistance paralleled with the petersen coil were controlled when there is a permanent single-phase ground fault in the system.

该方法当系统发生永久性单相接地故障时通过控制开关短时投切与消弧线圈并联的电阻，从而大大增强单相接地故障时的零序电流有功分量。

Influence of zero-sequence mutual inductance to pilot protection in parallel lines

相邻线路零序互感对线路零序纵联方向保护的影响

Analysis of Earth Fault Compensation Factor in Digital Distance Realy and its Application for Testing In this paper, some special problems of ground-fault distance protection for zero-sequence mutual inductance lines are pro-posed.

本文主要分析讨论接地距离保护在有零序互感线路上应用的一些特殊问题，尤其对零序补偿系数的不同情况进行了分析。

Also interference with telephone circuit is reduced because of the absence of zero-sequence currents .

由于无 零序电流,对电话线路干扰的影响也降低.

Both the zero-sequence lumped parameters and the distributed parameters of the transmission line sare needed for electrical engineering.

工程不但需要互感线路的零序集总参数，还需要分布参数。

The voltage regulation characteristic of autotransformer, external compensation of zero sequence current for three Y au.

论证自耦变压器的电压调整性能 、 三Y型 自耦变压器的零序电流外补偿、自耦变压器继电保护整定的特殊问题.

Zero-sequence Current and New Method of Fault Line Location in Distribution Network

配电线路的零序电流和故障选线新方法

This paper carried on the detailed analysis of many algorithm including three-step current protection algorithm 、 inverse time zero sequence current protection algorithm and voltage protection algorithm, and gave the DSP programming flow chart.

并对包括三段式电流保护、反时限零序电流保护、电压保护等算法详细分析，给出了在实现DSP编程中流程图。

CPLD is used to compare zero-sequence active component power with the given power to determine whether drive current leakage measurement circuit, and to fulfill voice alert and the serial communication with computer.

CPLD实现对零序有功功率与给定功率进行比较以决定漏电保护电路的是否启动，并实现语音报警和与上位机串行通讯的功能。

The Optimization of Sequence Pairs with Low/ Zero Correlation Zone Using Genetic Algorithms

应用遗传算法优化低/零相关区序列偶

Study on Zero-Sequence Over-Current Protection Configuration and Setting Calculation for 330 kV Autotransformer of Northwest Power Network

西北电网330kV自耦变压器零序过流保护的配置及整定计算

Practical calculation program of zero-sequence and distance protections for HV power network line

高压电网线路零序和距离保护计算实用程序

In a low-resistance grounding system, when the multi-loop line occurs grounding fault inphase, It will cause large changes of the zero-sequence current distribution characteristics, which will cause zero-sequence protection refused to action.

在小电阻接地系统中，当多回线同相发生接地故障时，将引起零序电流的分布特征发生较大变化，从而引起零序保护的拒误动。

Hotline Measuring of Zero-sequence Parameter in Transmission Line

输电线路零序互感参数带电测量

In the meanwhile it is pointed out that the quantity change of the parallel line and zero-sequence impedance must be retested.

同时还指出平行线路条数变化，零序阻抗均需重新测试。

Study on the Secondary Coil Series-parallel connection of Multi-cables Zero-sequence Current Mutual Inductor

多根电缆零序电流互感器二次线圈串并联的研究

Research on Application of Low/ Zero Correlation Zone Sequence Pairs in Spread Spectrum Communication System

低/零相关区序列偶应用于扩频通信系统的研究

The equations of zero-sequence coupling transmission lines are derived from telegraph equations.

运用电报方程推导出 零序 耦合传输线的输线方程.

These reactive devices can't suppress the zero-sequence and negative-sequence current resulted from the unbalanced load.

而且不能补偿不平衡负载导致的 零序 、负序和中线电流.

Judging the CT secondary circuit of zero-sequence differential current for autotransformer

自耦变压器零差保护二次接线正确性判断

Feasibility analysis on zero-sequence current differential principle applied in busbar protection

零序电流差动应用在母线保护的可行性分析

Construction Method of Zero-sequence Current in Distribution Networks with Two Phase' Current Transformers

两相电流互感器配电网零序电流构造方法

Ability Analysis of Zero-Sequence Reactance Relay Against Transient Resistance

零序电抗继电器抗过渡电阻能力分析