Analysis of switching electronic loads operating as active filter on a bus

Abstract

The paper analyzes how the switching system of an electronic load influences the reactive power of the bus, and how they behave as active filters when connected in parallel. In laboratory, didactic electronic loads were used, both called Dimmer Flex, and the works divided into three cases. In the first case, the electronic load starts applying voltage, after half of each half-cycle, the current was interrupted and, according to the meters, reactive power was injected into the bus. In the second case, Dimmer Flex was used to break the start of the current at around half of the each half-cycle, and reactive power was absorbed from the bus. In the third case, the first device was positioned in parallel with the second, and the reactive power flow was almost completely compensated and the harmonic distortion value of the current decreased, proving its role as an active filter.

Harmonic Interaction among Electronic Loads and Its Effects on the Electrical Quantities and Billing: Case Study with Lighting Devices

“…In [7], [16], [17], the authors show the problems caused by harmonic distortion, mainly due to the increases of nonlinear loads on the electrical system. The concern involves some questions, such as how to calculate the electrical energy billing on nonsinusoidal system and if high harmonic currents can cause significant errors on the meters.…”

“…Harmonics effects on the electrical system, electricity measurement and billing, and on other loads are partially known. In [7]- [11], it is possible to find some developed research about this. There are a lot of aspects on harmonic distortion and its effects.…”

Analysis of electronic loads on electrical measurements, power quality and billing

“…In [16,70,78], the authors show the problems caused by harmonic distortion, mainly due to the increases of nonlinear loads on the electrical system. The concern involves some questions, such as how to calculate the electrical energy billing on nonsinusoidal system and if high harmonic currents can cause significant errors on the meters.…”

“…The effects of harmonics distortion on the electrical energy measurement and billing systems were discussed in [16,70,78]. Their focus involves concern about the increase of nonlinear loads on the electrical system.…”

“…Harmonics effects on the electrical system, electricity measurement and billing, and on other loads are partially known. In [70][71][72][73][74], it is possible to find some developed research about this. There are a lot of aspects on harmonic distortion and its effects.…”