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In HVDC converter station, the characteristics of steady electromagnetic environment is related to the working state of converter valve's AC-DC conversion process. Every fast firing and breaking process of the converter valve leads to an electromagnetic transient process, as well as a electromagnetic field with high frequency and wide spectrum. This paper analyses the working process of 12-pulse-converter,...
Converter valve will produce transient electromagnetic process when it cut off rapidly every time, then it will radiate high frequency Electromagnetic field. This article research radiate of 12 impulse valve, I use computer simulation technology and model experiment, Compare two groups' data.
The wide-band frequency electro-magnetic (EM) noise is generated during turn-on and turn-off processes of thyristor valves in converter stations. It will be conducted along the primary circuitry, and may interfere with secondary systems by the way of conducted and radiated coupling. The plusmn800-kV UHVDC transmission project is one of newly developed technique and used barely in the world. The electro-magnetic...
According to the diversity of transient electromagnetic quantity, typical waveforms and spectrums of switching operation are got in transient disturbance; then, the disturbance characteristic of time and frequency domain are analyzed. Mainly the distribution probability and frequency statistic of characteristic parameter are analyzed. Drawing up probability graph of time-domain and envelope diagram...
The wide-band frequency EM noise is generated during the processes of firing and turn-off of thyristor valves in converter stations. It will be conducted along the primary circuitry, and may interfere with secondary systems by the way of conducted and radiated coupling. The plusmn800-kV UHVDC transmission project is one of newly developed technique and used barely in the world. The EMI problem is...
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