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A method to get the quasi-peak (QP) response of EMI receiver to inputs of corona pulses is presented. The present method is a dynamic simulation method which can produce the instantaneous QP response step by step in time domain. The validity of the method is verified by comparing the calculated results with the CISPR specifications as well as with the measured results of an EMI receiver. Based on...
It is an effective method for detecting and evaluation substation's grounding grids with break and corrosion to measure magnetic induction intensity. But it will be faced with complicated EMI problem to measure effectively magnetic induction intensities in substation. So power frequency harassment and transient EMI caused by switching operations are measured practically in a few substations. These...
With the application of semiconductor switch in power systems, wideband modeling of related devices is necessary during the recent years. In most cases, simple equivalent circuit models are available to the designers, which correlate well with the measured parameters at lower frequencies, however, deviate at higher frequencies. Black-box modeling can obtain precise results, but the elements in these...
Narrow slots are often employed in printed circuit board and electronic package designs to isolate the power noise coupling. In this paper, an equivalent circuit method is proposed to analyze the power and signal integrity of gapped power-ground (PG) planes. With this method, the whole gapped PG planes are divided into two regions: one is a parallel-plane structure, and another is a slot structure...
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...
Experts from Wuhan high voltage research institute have developed a lightning location system. Experimental studies on the frequency response characteristics of the magnetic field measuring loop were carried out at a thunder detection station, and results are presented in this paper. In addition, theoretical analysis and numerical analysis are presented, and suggestions of improvement for the magnetic...
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