不对称度的增加将进一步增大电容电压的脉动和负序电流的大小。
Larger system voltage unbalance degree causes larger capacitor voltage pulsation and negative sequence current.
它也可与负序电流突变量起动元件配合，构成一套变压器主保护。
It can be combined with a set of transformer main protection by combining negative-phase sequence current sudden-change starting element.
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。
A novel principle of negative-sequence current compensation based adaptive zero-sequence over-voltage protection is therefore proposed.
针对电网出现的频率偏差，提出一种谐波负序电流指令的检测方法。
According to the frequency excursion in power systems, this paper proposes a detecting method of harmonic negative current instructions.
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。
Active power filter can compensate current components which include distortion and negative sequence current components when it is used in unbalanced three-phase circuit.
结合负序电流的通用表达式，讨论了在不同负荷条件下的原边电流不平衡度。
The unbalanced degrees of current in primary winding under different load conditions are discussed, which are based on the general expressions of negative phase sequence current.
计算分析结果表明，该方法能够有效抑制由线路参数不对称产生的负序电流和电压。
The results from calculation and simulation show that the proposed method can effectively restrain the negative sequence voltage and current caused by unbalanced parameters of transmission line.
本装置配有过流保护、负序电流保护、零序电路保护、起动时间过长保护、低电压保护。
Over current protection, negative current protection, zero sequence current protection, over time of start protection and low voltage protection is configured in the device.
结果表明，该变压器具有增压、抑制负序电流、增大输出容量和提高容量利用率等优点。
It is showed that this transformer has the advantages of boosting, rejecting the negative sequence current, increasing the output capacity and raising the capacity utilization ratio.
电网中存在谐波、无功、电压闪变及负序电流等问题，严重影响电能质量，危害电力设备。
Harmonics, reactive power, voltage flicker and negative-sequence current of power grids can affect the power quality and harm the power equipment badly.
该控制方法能改善系统电能质量的调节，有效地补偿负荷侧谐波电流、无功功率和负序电流。
This control principle can improve the control of power quality and effectively compensate the harmonic currents at load side, reactive power and negative sequence current.
本文介绍了应用等效损耗法确定QF Q - 50 - 2型汽轮发电机负序电流能力的试验方法和结果。
This paper describes the test methods and the various test results for the determination of the negative sequence current capability of type QFQ-50-2 turbo-generator by equivalent loss method.
电弧炉具有低电压、大电流而且负荷非线性的特点，在其运行过程中产生大量的负序电流，导致电网不稳定。
The characteristics of arc furnace are low voltage, big current and nonlinear load. Much negative sequence current is produced during running. As a result, the power net is unstable.
电力系统中网络结点千百个交织密布，有功潮流、无功潮流、高次谐波、负序电流等以光速在全系统范围传播。
Power system Network Node thousands of mixed clouds, active power, reactive power flow, high harmonics, negative sequence current of the speed of light in the system-wide communication.
针对单纯采用相电流判据的不足之处，本文提出增加零序电流、负序电流及电流变化量判据，以有效地避免保护误动或者拒动。
Zero-sequence current criterion, negative sequence current criterion and phase current variation can be used to improve the performance of breaker failure protection for ACF sub-bank.
为了解决上述问题，本文采用了抑制网侧负序电流分量的控制方案，仿真结果表明采用该方案后输出电流波形满足了正弦化及平衡化的要求。
In this paper, a control system with restraining negative sequence current is adopted simulation results of which demonstrate that output current waveform can meet sinusoidal and balanced demand.
基于高压输电线路的分布参数模型，使用线路两端电压、电流的正序和负序分量，对高压输电线路两点异相故障提出了一种新的测距算法。
Based on the distributed parameter model for transmission line, a new fault location method for short circuit fault of two points on different phases of the power transmission line is presented.
基于对称分量法理论，提出了基于检测正序、负序、零序电流分量的电动机保护方法。
Based on the symmetry component theory, a method of the motor protection is presented by measuring positive, negative and zero sequence current component.
该方法采用高频电压载波注入方式形成高频电流矢量，其负序分量包含了转子空间位置信息。
The method employed high-frequency voltage-signal injection to make motor form a high-frequency current-vector, of which the negative component current contained rotor space-position information.
实验结果表明，该装置可对三相四线制系统中的谐波、负序、零序等电流分量进行补偿。
Experimental results prove the proposed control method can compensate the harmonic, negative sequence and zero sequence current components in the three phase four wire.
第二种控制策略中，输入电流矢量根据输入电压正、负序成分进行动态调制。
In the second one, the input current displacement Angle is dynamically modulated as a function of positive-and negative-sequence components of the input voltages.
介绍了一种利用电动机正、负序等效电流实现电动机热过载保护的方法，给出了保护动作的数学模型、离散算法及其计算机实现方法。
A thermal overload inverse time equation that is quite close to the real thermal locus of motor and its implementation method are proposed based on the thermal characteristic of motor.
介绍了一种利用电动机正、负序等效电流实现电动机热过载保护的方法，给出了保护动作的数学模型、离散算法及其计算机实现方法。
A thermal overload inverse time equation that is quite close to the real thermal locus of motor and its implementation method are proposed based on the thermal characteristic of motor.
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