Active Power Line Conditioner with Impulse Asymmetric Current Battery Charging System

Abstract

A scheme of an active power line conditioner with a battery charge system with impulse asymmetric current battery charging system is presented. Numerous publications point to the expediency of constructing a system that would realize both functions of compensation of reactive power and the provision of guaranteed power supply. The existing nonlinearity of loads affects the reduction of the power factor and the increase of the content of higher harmonics of consumpted current, which leads to distortion of form of network voltage. Many loads require high quality power supply, and their high-quality work can only be achieved with low content of higher harmonics and a shape factor that corresponds to the ideal sinusoidal voltage. In addition, the deviation of the power factor from one and the corresponding current distortion result in energy losses in the networks and equipment, which in turn is one of the reasons for additional heating and a decrease in the life of the devices. From the analysis of battery charge methods, it follows that the method of impulse asymmetric current battery charging exceeds the quality of the other and provides a reduction in the charge: the memory effect, peak values of temperature and internal pressure of the battery, which can increase the life of the battery in 1.5-3 times. The main disadvantage of this method of battery charge is a relatively low efficiency, but with the use of circuit solutions that allow using the energy of a bit pulse repeatedly to charge the battery, the efficiency is increased to 80-90% and above. Total increase in the efficiency compared with existing devices reaches 12-34%. The purpose of the work is to calculate the reactive elements and the main parameters of the filter-compensating converter when used together with the system for the sake of the battery with impulse asymmetric current. Time diagrams describing the main operating modes of the device, as well as equivalent circuits of the converter, that describes its operation at the appropriate time intervals are given. Using the balance of energy and the method of calculation on average currents and voltages, expressions for calculating the basic parameters of the compensator, provided the consumed additional energy for charging the battery are derived. It is determined that the capacity of the storage capacitor increases in proportion to the additional energy required to charge the battery, with the constant value of the inductance of the smoothing inductor.Ref. 10, fig. 3, tabl. 1.