A review of high frequency emission in 2-150 kHz range

Abstract

This paper reviews state-of part of discussion that concern about high frequency emission. Sometimes there may be emission in the range of high frequencies because of the fast improvement of energy saving equipments in our homes. Investigators and standardized organization given a very much importance to the disturbances of power quality that occur in the range middle of 2-150 kHz. Disturbances of these high frequencies are becoming an increasing concern in the industry, particularly due to the growth of distributed and embedded generation. Now days, a large number of researches are proceeding at a large number of places, yet information regarding supraharmonics remains confined.

Investigations into Higher-Frequency Hysteresis Current Controller for Supraharmonic Hybrid Active Filters

“…Method Conclusion [1] Supraharmonics in electric vehicles Frequency beating, tripping of residual devices [3,6,17] Measurement and standardizations Reduces life expectancy of electrical equipment [16] Supraharmonics in multiple VSCs Supraharmonics are distributed integer multiple of the switching frequency of VSC [4,5] Supraharmonics in power electronic loads and mode of compensation…”

“…The principle is to extract the compensational error current from three-phase voltage and current measurements expressed in their alpha/beta domain using a transformation matrix, T, as seen in Equation (4). Ignoring the zero sequence currents, the instantaneous active, p(t), and reactive q(t), powers can be computed with Equation (5). Finally, decomposing p(t) and q(t) into direct and oscillatory components, the reference currents can be calculated from the oscillatory component of the active power, P, and the total reactive power, q, for a partial compensation.…”

“…Supraharmonic interference received less attention due to the limited use of fast switching converters in the past [5]. But with the recent high demand for electric vehicles, wireless and fast battery charging stations, variable-speed drives, and electronically controlled lamps [6], there is a need to increase research in this area.…”

“…Power electronic converters are also the primary victim of supraharmonic frequencies, as their dynamic performance are crippled, as the authors in [4,5,19,20] explored. The authors in [4,5] explored the power electronic converters and supraharmonics and [17] confirmed the effect of higher harmonic frequencies as the reduction in lifespan of power system devices.…”

“…Power electronic converters are also the primary victim of supraharmonic frequencies, as their dynamic performance are crippled, as the authors in [4,5,19,20] explored. The authors in [4,5] explored the power electronic converters and supraharmonics and [17] confirmed the effect of higher harmonic frequencies as the reduction in lifespan of power system devices. The authors in [8] successfully modeled the emissions from supraharmonic devices from the parallel operation of two converters and confirmed that it can be predicted by linear models.…”