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This study presents the results of technical and economic analysis of high-voltage direct current (HVDC) transmission system and high-voltage alternating current transmission system for bulk transmission over very long distances. The last is a point-to-point transmission that does not need reactive compensation and does not have intermediate substations, the half-wavelength transmission (HWL). Special...
An advanced acquisition system is established to implement on-site measurements so as to characterize the electromagnetic interference (EMI). The time-frequency analysis methodologies, including instantaneous frequency analysis, short-time Fourier transform, Wigner-Ville distribution and so on, are introduced to extract and present more detailed EMI information to characterize the electromagnetic...
With the development of wireless sensor networks, energy supplying problem become critical. One solution method is energy scavenging technology which harvest energy existed in environment, such as solar, vibration, air flow, temperature difference, ambient electromagnetic fields and etc. In substations, the method harvesting energy from the electric field to power sensor nodes is adopted because it's...
Due to frequent switching of the thyristors in a static Var compensator installed within a power substation, large amount of broadband electromagnetic emissions are being generated, which results in electromagnetic contamination to both the power grids and the victim electronic devices positioned nearby. Based on optical fiber, circuit and field transducers, an advanced acquisition system is established...
In this paper, a simulation model is established to investigate on the conducted mechanism in substations installed with SVC (Static Var Compensator) devices with a view to characterizing the main causes of the conducted interference. The high-frequency macro model for thyristors is established with a nonlinear time-varying resistor to simulate the switching characteristics of the thyristors. Based...
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