A complex source of electrical energy for three-phase current based on a stand-alone voltage inverter

Abstract

Purpose. To substantiate the operability of a combined power source of asynchronous electric drive of a vehicle, consisting of two power sources and one autonomous voltage inverter, to establish operating modes using zero combinations of inverter keys and to formulate a condition for energy transfer to an electromechanical converter from an additional power source.Methodology. In the study on the work of an autonomous voltage inverter with two power sources, methods of mathematical and simulation modeling were used. To select the optimal method for implementing the control algorithm, a comparative analysis method and an analysis of a symmetric power system were applied.findings. The efficiency of the asynchronous motor power system from one autonomous voltage inverter with two power sources is proved. The paper presents mathematical calculations for constructing an electromechanical circuit, a modified algo rithm for switching the keys of an inverter of a combined power source is given; physical processes are described.originality. The conditions of energy transfer to the electromechanical converter from an additional power source are formu lated, which are provided by the choice of the load circuit parameters of the EMF of the additional source and increase the voltage component and the load capacity of the electromechanical converter.Practical value. The electromechanical circuit of the vehicle's asynchronous electric drive has been simplified due to the com bined power supply, consisting of two power supplies and one autonomous voltage inverter. One of the sources is an additional source that is connected to the electric motor through the connection circuit to the zero point of the stator motor windings and the "negative" terminal of the autonomous voltage inverter and includes a DCDC inverter, diode, inductor and discharge resistor.

Problems of development of innovative power supply systems of Ukraine in the context of European integration

“…In December 2019, the European Commission presented the European Green Deal, an ambitious policy package aimed at making the European Union's economy environmentally sustainable. The goal is to achieve climate neutrality by 2050 and turn the transition into an economic and industrial opportunity for Europe [23].…”

“…A greener Europe will depend more on imports of products and raw materials that serve as a source of clean energy and environmentally friendly technologies. The Green Deal will have an impact on Europe's international competitiveness [23].…”

“…During this period, oil is expected to be almost completely excluded, while natural gas will provide only a tenth of the EU's energy in 2050 (Fig. 16) [23].…”

“…According to the data by Bruegel/ECFR (Eurostat 2020), dependence of EU countries on the natural gas importers is illustrated as follows (Fig. 17 [23]).…”

“…The energy transition of the Federal Republic of Germany in the perspective of 2030−2050 (Fig. 11) also envisaged further consumption of gas as a more environmentally friendly energy resource compared to coal and oil [23]. Current intermediate stage of the implementation of the low-carbon development policy has turned out to put the Federal Republic of Germany in even greater dependence on the Russian Federation.…”