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When the PD occurs, the charge moves rapidly, producing high-frequency currents while also radiating electromagnetic waves. While the switchgear is a metal closed structure, but also make a partial discharge signal to produce multiple reflections. Usually there is a gap in the surface of the switchgear, electromagnetic waves can leak through the gap to continue in the air and switch cabinet surface...
Insulation technology of high voltage electrical equipment is a must be used in high voltage electrical equipment, the use of high-voltage electrical equipment insulation technology can ensure the safety and stability of power equipment supply. In the power supply, the application of high voltage electrical equipment insulation technology should be used to detect the operation of equipment. Therefore,...
This article investigates variable optical characteristics of Liquid Crystal Display (LCD). The main function of light intensity intelligent control system is to adjust the brightness of the LCD screen of automotive sun visors according to the light intensity of external environment. The working process starts sending a processed analog signal to single chip microcomputer by collecting data of environmental...
The principle of DFIG wind power generation system is analyzed and the mathematic model is developed. The function of the active Crowbar in LVRT is studied and the parameters of the active Crowbar are given. The simulation result shows that the DFIG system with active crowbar can protect converter against overvoltage and over current. Finally, main power circuit and driving circuit of the active Crowbar...
Grid-connected photovoltaic power station has changed the distribution of transmission power, thus influences the voltage distribution of load node. In accordance with the relevant provisions, grid-connected photovoltaic power stations should not be active participation of voltage regulation, but it grid-connected will have a supporting role for each node voltage. This paper proposes a maximum admission...
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