Conducted emission variations using low power LED lamps connected to other devices

Abstract

In this paper, an analysis of the emissions of an LED lamp is performed, when it is connected in parallel with electrical devices of linear and non-linear behavior. The objective is to determine if the presence of other loads connected in the same installation can cause a change in the emissions of the LED lamp. A measurement assembly and a test electrical network are built to perform the measurements of voltage and current emissions generated by the LED lamp between 1 Hz and 250 kHz. Incandescent, CFL and LED lamps of different power and technology are used as test loads. The analysis of results indicates that the increase of devices connected in parallel to an LED bulb can in general reduce the current THD. However, there are components in the current emission that increase their RMS value.

Concentration of Multi-Point Measurement Data for DC-150 kHz EMI Analysis

“…Power supply configurations, especially micro-grids, are becoming more complex and interconnected with multiple sources and loads. Load behavior, with the advance of switching power electronics converter (SPEC), is drawing more non-ideal currents and volatility of instantaneous power is a great concern for reliability of micro-grids and design engineers [1]. Cases of micro-grid disruption and failures are increasing and can be of serious concern [2], such as the failure of backup emergency power supplies of hospitals [3].…”

Superposition of Transient Switching Currents for Non-Linear Devices

“…The last two decades have seen accelerating adoption from consumers due to the low cost, high-efficiency and smaller size footprint. With the accumulation of many SPEC, notably light emitting diode (LED) lighting products and power supplies [1], [2], electromagnetic compatibility (EMC) problems are often encountered. Although some of these devices may have a small power rating, inrush currents can be significant during initial activation or switching conditions which may become more prominent in case of isolated/islanded, emergency backup systems or weak micro-grids [3].…”

Standardized Impedance: Microgrid Perspective for Inrush Current Compliance

“…Increased implementation of distributed generation, nonlinear or asymmetrical loads and sources are currently trending with the drive for decentralized power generation as well as technological advantages of small efficient power supplies [1], [2]. As a result, varying levels of grid impedance in combination with non-linear loads results in Electromagnetic compatibility (EMC) challenges and grid performance degradation [3].…”