The Influence of Electric Loads Switching on the Reactive Flow of a Voltage Bus

Abstract

This paper analyzes how the conduction range of an electronically switched load, present in consumer units, influences the reactive power flow in a bus. In the laboratory measurements, an electronic load with two switching options was used. In the first case, the process starts applying voltage in the load, and after approximately half of the positive half-cycle the current is interrupted, and the same way for the negative half-cycle. In the second case, voltage was applied to the load and the current started around the half of the positive half-cycle, as well as for the negative half-cycle. Subsequently, measurements were carried out, through the use of electric magnitude meters and energy analyzers, to evaluate the behavior of the reactive power flux of the nonlinear electronic load on the electric system bus. Measurements of voltage waveforms, currents, as well as active and reactive powers, and power factor, were performed in the two types of switching carried out in the non-linear load, which has similar behavior to the electronic loads present in Consumer Units of groups A and B. Analyzing the behavior of certain electronic loads by electric energy meters and analyzers, we observe an inductive or capacitive reactive flow that can behave like an injection or absorption of reactive power in the bus. This paper aims to analyze the reactive power flow of electronic loads and their influence on the charging and power quality system, when connected in the busbus of the consumer units of groups A and B.