要改造的发电机是进口的，且容量大，运行时三次谐波电压很小。
The large capacity generator reconstructed is imported and its3rd harmonic voltage is low.
发电机的谐波组开路或短路，无三次谐波电压输出，检查绕组接头或拆换绕组。
If no triple overtone voltage, check the winding lug or replace with another winding.
介绍了漫湾电厂发电机3ω定子接地保护原理、调试方法及发电机定子三次谐波电压的测试。
The principle, testing of generator stator ground protection based on the third harmonics, measurement of the third harmonics on generator stator are introduced.
由于三次谐波电压在电机负载时将相应增高，因此无须其他任何复杂电压自动调节器即可达到自激恒压性能。
Since triple overtone voltage will increase accordingly when there is load in the generator, it can activate constant voltage on its own without any other voltage automatic governor.
进而提出了基于多回路-有限元耦合数学模型的同步发电机定子单相接地故障三次谐波电压保护方案校验方法。
Furthermore, a checkout method for the third harmonic voltage based protection scheme of stator ground fault in generators is presented based on the verified MLM-FEM coupled model.
电力系统的谐波是电力系统电压正弦波形产生畸变，电力机车用电会产生0次到50次谐波。
The power system harmonic is the voltage sine wave of power system get distortion; electric locomotive power will have 0 to 50 harmonics.
由于电网中非线性设备的使用日益增多，所产生的高次谐波电流大量注入电力线路中，使得电网电压、电流波形发生畸变。
Since more and more nonlinear equipments have been used in the power supply network, the generated high harmonics current leads to waveform distortion of voltage and current in the supply network.
在研制这种多电平逆变器时，一个关键的问题就是如何来产生开关角度，并以此来生成基波电压且不产生特定的低次谐波。
A key issue in the design of such an inverter is to determine the switching angles so as to produce the fundamental voltage and not to generate specific lower order harmonics.
采用串联电压谐振产生高压起辉，必须采取过流保护措施。 电子镇流器高次谐波的产生及其所带来的危害。
We also should take protective measures for the volt power bright spots that produced by the series voltage resonance and the higher harmonic produced by the Electronic Ballast.
在非线性电阻消谐方式下，正温度系数(PTC)热敏电阻和三次谐波滤波器可以较好地解决零序电压偏高的问题。
Positive temperature coefficient (PTC) thermistor and triple frequency harmonic filter can reduce zero sequence voltage when a nonlinear resistance is used to prevent ferroresonance.
本文提出的角度PWM方法着眼于电机的定子电压空间矢量，使其矢量角均匀变化，减小电压波形中的高次谐波分量。
The presented phase Angle PWM method is centering attention on motor stator voltage space vector and controls the vector Angle to vary linearly and so reduces higher harmonics in voltage wave.
就三个变电所CVT故障或异常导致的二次回路电压出现了谐波、三相不平衡及暂态扰动等现象分别进行了分析。
The phenomenon of CVT faults resulting in secondary side voltage harmonics, voltage unbalance or transient disturbance was analyzed in this paper.
KIWA综合节电装置以其独特结构形式，通过调整三相电流和电压的平衡，消除电网高次谐波。
KIWA synthetic power saver with his unique structure form eliminates higher harmonic of the electrical network by way of the balance in adjusting three-phase current and voltage.
本文将三次谐波注入的PWM控制方案应用到四桥臂三相逆变器中，可以带非对称负载且具有较高的电压利用率。
The PWM control strategy with 3-th harmonic in addition is presented for four-leg three-phase inverter, the inverter can deal with unbalanced load and has a high utilization of dc bus voltage.
但是CVT内部等值电容与电抗串联可能产生次谐波谐振，引起过电压，会使CVT损坏。
The subharmonic vibration, however, caused by the series connection of equivalent capacity inside CVT with the reactor may lead to over-voltage which might damage CVT.
对空载、带载情况下变频器产生的不平衡电压和高次谐波的含量进行了测试与分析。
Reference to research status of MDT and by analyzing the special working environment of the ESP, the multi-signal are carried with motor power line.
提出一种电网电压不对称情况下抑制三相脉宽调制(PWM)电流型变流器(CSC)直流输出电流二次谐波、减少网侧电流低次谐波的控制方法。
This paper presents a new control strategy to eliminate second harmonic of dc output current in the 3-phase unbalanced network voltage PWM current-source converters (CSC).
采用三相整流电压的6次谐波前馈（注入），以减小三相电源的5次谐波电流。
The 5th harmonic current of 3-phase AC power source can be reduced by the 6th harmonic feed forward of 3-phase rectifying voltage.
为了消除单相电压型PWM整流器输出侧二次谐波的影响，经常接入电感、电容组成的二次吸收回路，本文对于二次吸收回路的参数选取和运用效果进行了研究。
In order to eliminate the second-harmonics in the output side of single-phase PWM rectifier, the filter circuit consisting of an inductor and a capacitor is often used.
为了消除单相电压型PWM整流器输出侧二次谐波的影响，经常接入电感、电容组成的二次吸收回路，本文对于二次吸收回路的参数选取和运用效果进行了研究。
In order to eliminate the second-harmonics in the output side of single-phase PWM rectifier, the filter circuit consisting of an inductor and a capacitor is often used.
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