Frequency Characteristic of New-type Load Considering Power Electronics Technology

Power electronics based load equipment has now more and more used in power grid these years. Their frequency characteristic is worthy of study in detail for it is very different from that of traditional load equipment, and the regular load model may not be suitable such as in the security and stability analysis of modern power system. Firstly, so much these new-type load equipment are classified in several typical categories. Then, response curves are obtained from physical experiment. Thereafter, the static frequency characteristic of new-type loads is discussed and the trend of parameters is predicted. Finally, compared with the recording curves of a real bulk power grid during large frequency disturbs, the change of parameter is verified and the potential impact on power grid is analyzed.