negative sequence

Based on the analysis of main fault types of LV ( Low Voltage) flameproof motor, the negative sequence protection principle is proposed for its asymmetric short circuit fault and open phase fault.

通过分析低压隔爆电动机的主要故障类型，针对不对称性短路故障和断相故障提出了采用负序保护原理进行保护的方案。

A New Air Cooling System by Steam Power Cycle Coupled With the Positive and Negative Sequence Refrigerating Cycle

蒸汽动力循环耦合正、逆制冷循环的电站空冷系统

In order to control the positive sequence, negative sequence and zero sequence components independently, the last two control strategies based on bisynchronous coordinates are introduced.

为了实现对正序、负序和零序分量的独立控制，本文还采用了两种基于双同步旋转坐标变换的控制策略。

Analysis of the reason of pilot zero sequence directional protection mal-function and study of negative sequence directional element on parallel double-circuit lines

平行双回线路纵联零序方向误动原因分析及负序功率方向研究零序电哩向保护装置

Over current protection and negative sequence current protection are adopted to realize remote back-up protection.

为实现远后备保护功能，应配置过电流保护和负序电流保护。

The quantitative relationship between the reactive compensator and load impedance was derived, and its application to improvement of balance among three phases for reducing the negative sequence component in electrical networks for railway electrification was discussed briefly.

本文对三相平衡原理中补偿电抗和补偿电容与负荷阻抗之间的定量关系从电路角度进行了推导，并对其在电气化铁道负序补偿中的应用，做了初步探讨。

It uses the matrix concept to calculate the compensation conductance, utilizes the capacitor and TCR ( thyristor control reactor), then constitute negative sequence idle work compensation system.

它利用矩阵的概念来计算补偿导纳，运用电容器和TCR（晶闸管控制电抗器）并联构成负序无功补偿装置。

The method only uses the positive sequence and negative sequence components of two terminal voltage and current.

该方法利用线路两端电压、电流的正序和负序分量，不需选代计算，并适用于一点故障情况。

However, there will be a negative sequence component when grid voltage drops.

然而在电网电压跌落情况下，会有负序分量的产生。

The design of negative sequence protection is mainly introduced with seriously unbalanced power supply voltage fault, open phase fault and two-phase short circuit fault.

从电源电压严重不平衡故障、断相故障和两相短路故障三方面介绍了负序保护方案设计；

Furthermore, we considered phasor dynamics of values of negative sequence and zero sequence. Analysis of Unbalance Three-phase Circuit and a Practical Circuit for Judging Phase Sequence

对于发电机的负序和零序，采用了等值的电路模型并考虑了其中电压和电流的相量动态。一种相序判定方法分析及其实用电路

Negative sequence currents generated in asymmetric short circuit fault and open phase fault are simulated by experiments and the measured experimental results coincide with the requested values, which proves the correctness of protection scheme.

并通过试验方法模拟了发生不对称性短路故障及断相故障时产生的负序电流，试验所得到的实测值和要求值基本吻合，从而验证了保护方案的正确性。

Active power filter can compensate current components which include distortion and negative sequence current components when it is used in unbalanced three-phase circuit.

电力有源滤波器能动态补偿不对称三相电路的畸变电流、负序电流分量。

In analyzing the regenerative braking conditions of the negative sequence current, adopting the common negative sequence calculation method to the traction transformer negative sequence current general expression for a variety of wiring.

在分析再生制动工况下负序电流问题上，从负序的通用计算方法入手，得出计算适用于多种接线方式的牵引变压器负序电流通用表达式。

Testing Method of Negative Sequence Load-flow Blocked Rotor Second Harmonic Turn-to-Turn Fault Protective Relay

负序功率方向闭锁转子二次谐波匝间保护的调试方法

Based on features of negative sequence components in the three-phase system, an islanding detection method based on the active negative sequence component disturbance ( ANSCD) is proposed.

根据三相系统含有负序分量的特点，采用有源负序扰动法进行三相并网逆变器的孤岛检测。

The Unbalance Output Of Digital Negative Sequence Strainer

数字式负序滤过器的不平衡输出

The analysis and calculation on system frequency changing, oscillating and symmetrical fault offers reference for choosing arithmetic of digital negative sequence unbalance output in relay protection.

分析计算这2种方法在系统频率变化和振荡以及三相故障时的负序不平衡输出，为数字式负序滤过器的算法选择和继电保护中负序不平衡量的定值整定提供依据。

Analysis Performance of Negative Sequence Current Filter Affect by Harmonic Component

谐波对负序滤过器工作状态影响分析