| 1. | Nonlinear loads cause abnormal conductor heating and voltage distortion
非线性负载能导致反常的导体发热和电压畸变。 |
| 2. | A simulation shows that this method is of high precision and can eliminate the effect of power voltage distortion
仿真实验表明，小波变换谐波检测可以有效地排除电压失真的影响，具有较高的检测精度。 |
| 3. | State feedback pole assignment technique is used to gain fast tracking of the output voltage , and a repetitive control is designed to reduce voltage distortion under nonlinear loads
系统利用状态反馈极点配置获得了电压跟踪控制的快速性，利用重复控制较好地抑制了非线性负载工况下的电压畸变。 |
| 4. | Repetitive control is used to reduce voltage distortion under abrupt load variation or nonlinear loads and attain good quality of the voltage waveform ; current loop is designed to quicken the dynamic response and strengthen the ability of the inverter control
重复控制可以抑制逆变电源在负载变化严重(空载加到满载)或者非线性负载条件下的输出电压畸变，保证输出波形的质量；电流环用以改善输出波形的动态响应特性，提高逆变控制的能力。 |
| 5. | It is determinant to correctly assess harmonic emission levels from different customers for monitoring and inhibiting the harmonic pollution . and to determine whether harmonic currents can cause significant voltage distortions , it is necessary to know the network harmonic impedances
为了监测与治理谐波污染就必须正确估计各个电网用户在公共连接点产生的谐波水平，而要判定谐波电流是否引起了严重的电压畸变，有必要知道电网的谐波阻抗。 |
| 6. | This paper addresses the buildup of an electric power supply and distribution system as well as equipment configuration of a frequency variable speed regulation system in ku - shan oil pipeline and describes the phenomena of voltage offset , voltage flicker , voltage distortion and frequency offset
摘要介绍了库鄯输油管道供配电系统的组成及变频调速系统的设备配置，对电网波动造成的电压偏移、电压闪变、电压畸变、频率偏移等现象进行了阐述。 |
| 7. | In accord with the state standard about harmonic . the harmonic permission value of tangqian line is calculated . some measurement data are shown and analyzed , and some main conclusion is drawed that the 7th harmonic voltages of tangqian line is near to the permission value , total harmonic voltage distortion ratio has oversteped the permission value . the 3th harmonic , the 5th harmonic , the 7th harmonic and the 9th harmonic current from tangqian line all overstep the permission , the largest 5th harmonic current ratio in tangsc reaches 44 % , the 7th harmonic and the 9th harmonic current in tang7c and tangsc is large maybe because the harmonic current is magnified . this paper studies the model of each element in tang yin substation
根据有关公用电网谐波的国家标准，计算出汤牵线注入汤阴变电站的谐波电流允许值，从实测数据可以得出一些重要结论：汤牵线7次谐波电压含有率的最大值接近国标中的限值，汤牵线的谐波电压总畸变率的最大值已超标；汤牵线注入电网的3 、 5 、 7 、 9次谐波电流都超标；汤6c电容器的5次谐波电流含有率较高，最高达到44 ；汤7c和汤8c电容摘要器的7次和9次谐波电流含有率偏高，原因可能是发生了谐波电流放大现象。 |
