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Capacitance parameter extraction of converter system is crucial to analyze the voltage distribution of valve tower under different overvoltages (such as lightening, partial discharge, etc) in HVDC converter station. According to the actual dimension of valves, the Method of Moments(MOM) based on the point matching method is applied to extract the capacitances, including the self-capacitances and the...
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.
In this paper, we analyzed the electromagnetic disturbance of plusmn 500 kV valve tower by electromagnetic field calculating software, which based on the instantaneous method, but also including the space electromagnetic field and the radio interference level. And then, we compare the radiated electric field strength with the relevant standards, its comparison with observed result is being studied...
High voltage direct current (HVDC) converter station generates radio frequency (RF) electromagnetic noise by the periodic turn-on and turn-off of the valve. This noise can affect the performance of adjacent communication, control and computer equipments and can interfere with carrier system operation. In order to calculate and predict the RF noise produced by the valve ignition, it is essential to...
Electromagnetic interference (EMI) is generated by the periodic switching of the valves in HVDC converter station. This EMI can cause high frequency radiative interference and conducted interference to the adjacent communication, computer equipment and carrier system operations. So a high-frequency model of converter valves is necessary to predict the characteristic of the EMI source. The modeling...
Many new technologies especially micro electronic components have been widely used in the secondary system of the HVDC converter stations. When switch operated there would be kinds of actuating of relay in secondary system. The action of relay tip will generated electromagnetic disturbance (EMD) which will transmit to the protect devices along the secondary cables. The results of an experimental study...
Conducted electromagnetic interference (EMI) due to the operation of HVDC converter station is caused by the processes during ignition and extinction of the thyristors in the converter valves. A method is developed in this paper for calculating the EMI level of the 12-pulse plusmn500 kV converter stations. In this method, the main equipments of the converter station are modeled and connected. The...
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