At present, China application generators have two categories: non-salient pole machine and a salient pole machine. Turbo-salient pole machine is used, what is the harmonic control, salient pole machine used for hydro. For harmonic components, the hidden pole machines than Salient machine, but with investment in technological progress, SCR, IGBT electronic excitation device, so the harmonic components of the generator has increased. When the terminal voltage is higher than the more than 10% of rated voltage, the magnetic saturation of the motor, will significantly increase the voltage of the third harmonic. Also in the transformer power supply side voltage exceeds the rated voltage more than 10%, the third harmonic will also significantly increase the secondary voltage. Since the grid voltage offset ± 7% or less, power generation, substation equipment generates harmonic components are relatively small, less than the national assessment standards and more harmonic control measures, and therefore power, not the impact of the grid voltage substation equipment waveform aspects of quality of the principal contradiction. Cause harmonic AC rectifier generates a DC electrical equipment is due to voltage rectifier equipment with a valve when the valve is less than the voltage and current is zero. Such electrical equipment in order to provide a smooth DC power rectifier equipment added in the energy storage element (filter capacitor and filter inductor), harmonic control, so that the valve voltage increase, plus stimulated the generation of harmonics. In order to control the voltage and current DC electrical equipment, in the application of the thyristor rectifier equipment, which makes such devices harmonic pollution is more serious, harmonic control method, and a relatively low frequency harmonics. Then rectified AC inverter electrical equipment, harmonics generated in the AC to DC and the above-described process of rectifying alternating current electrical devices, it becomes another AC waveform inverter retroreflective DC to AC current, such harmonic component produced by the device not only low order harmonics, but also higher harmonics. Harmonic management products, harmonic control, electrical and mechanical learning Connaught Connaught study by Henan Mechanical and Electrical Equipment Co., Harmonic management products, harmonic control, Xi Xi Henan Connaught Connaught Electrical and Mechanical Electrical Equipment Co., Ltd. (www.hnxinuo.com) this year introduced a new upgrade, the above picture is for reference only, please call the contact picture on this page or telephone obtain the latest information, contact: Yang Yongjie.