| 1. | Pure sine wave output . current harmonic content is small
输出纯正弦波，电流谐波含量小。 |
| 2. | Harmonic content of an a . c . power supply
交流电源的谐波含量 |
| 3. | The paper analyzes the wave figures before installing device and after it
分析装置安装前后的电压电流波形图、谐波含量及瞬流情况。 |
| 4. | Using the method of firing angle prediction , steady sinusoidal output voltage with low harmonic level can be generated
通过开关角预置方法，叠加出谐波含量低的稳压正弦波输出。 |
| 5. | At present , low power factor , abundant harmonics and negative sequence are the three main characters of electrical railway traction load
功率因数低、谐波含量大和不对称性是现代电力牵引负荷的三大技术特点。 |
| 6. | This device has some kinds of safeguard , such as protecting from super high voltage of the electric wire and ultra low voltage of the electric wire
该系统在实时监测数据的基础上，对低压网进行无功补偿，并且具有超压、缺相及谐波含量超标的保护功能。 |
| 7. | This paper also points out the influence of harmonics to the compensation system , and the protect measurement in the condition of high harmonics on the power net
在本文中，还介绍了电网谐波对补偿装置的影响，以及装置在电网谐波含量超标时采取的保护措施。 |
| 8. | The series h - bridge multilevel converter has the advantages of high output voltage , high power , lower harmonic content in line and motor sides and high input power factor
串联h桥多电平变频器具有输出电压高、功率大，输入侧和输出侧谐波含量小，输入功率因数高等特点。 |
| 9. | Active pfc techniques have been researched systematically and used widely in the recent twenty years because of high power factor ( pf ) and low total harmonic distortion ( thd )
有源pfc技术具有功率因数高和总谐波含量小等优点,在过去的二十年里,得到了长足的发展和广泛应用。 |
| 10. | In order to improve the electric power supply quality , a measure device is needed to analyse the distrubtion of the harmonic pollution in the power supply system
因此有必要对电网中的谐波含量及非线性用电设备可能产生的谐波畸变进行检测，掌握谐波的产生和分布情况，以便采取措施抑制谐波危害，提高供电质量。 |
