Andrey V. Sidorov

AC voltage regulator on the basis of the consecutive voltage regulator with PWM

In this paper construction of a system with the stabilization of the current value of the variable voltage and frequency based on variable voltage regulator with voltage boost with PWM control is proposed. A mathematical model of the system is constructed. Basic energy relationships and dependencies of the system are analyzed.

Power electronic transformer based on AC voltage regulator

Power electronic transformers (PET) based on ac voltage regulator with pulse-width regulation, in various areas of their application are discussed. A research of a power electronic transformer based on an ac voltage regulator operating at high frequency with ability to support unity power factor by means of mathematical modeling is conducted. The major power characteristics are obtained using the output factors of electric energy quality of the device. A universal single-phase experimental mock-up is presented.

Analysis of electromagnetic processes in the three phase multizone current source inverter

In this paper detailed analysis of the electromagnetic processes in the new multizone current source inverter was carried out, resulting in the analytical ratios for the qualitative evaluation of the load currents, depending on the relative resistance of the load, as well as an external characteristics of converter by using the method of differential equations algebraization was obtained [1]. The results of this analysis are summarized for any number of converter zones working on a capacitive divider. In addition, the results of analysis are confirmed by computer simulation of three-phase multizone current source inverter by PowerSIM software.

AC voltage regulators review

AC voltage regulators with or without a transformer review is provided. Several research directions by creation of new AC-AC converters are distinguished, such as voltage stabilization, voltage regulation to nominal values and also increasing of voltage with gain greater than unity, reactive power compensators, active filters, voltage dips and overvoltage compensators and soft start of electric motors devices. Actual solutions of such converters are considered, in each of them could prevail such qualities as high efficiency, reliability, small size and cost.

The universal control system for semiconductor converters with PWM

This paper considers an example of a control system for semiconductor converters with pulse-width modulation (PWM). Also the structure of the control system and an example of the proposed system implementation for a DC/DC converter are outlined.

Stand-alone power supply system using photovoltaic panels and diode-clamped multilevel inverter

This paper presents a structure of power supply system using the photovoltaic panels (PVs) and three-level Neutral-point-clamped (NPC) voltage source inverter (VSI). Control system is proposed. This system creates a stable output voltage at different load parameters.

Systems of independed power supply with AC voltage regulators at variable frequency

In this paper construction of a system with the stabilization of the current value of the variable voltage and frequency based on AC-AC regulator with voltage boost with unity power factor function with PWM control is proposed. A mathematical model of the system is constructed. The investigation results concerning the properties of the offered AC-AC regulators and their possible applications for stabilization of voltage in power supply stand-alone systems characterized by dual-range of change of the generated voltage are presented. The approach is based on the introduction of a high frequency variable voltage-additive supply voltage.

Three-phase AC voltage regulator as part of an autonomous system

In this paper construction of a system with the stabilization of the current value of the variable voltage and frequency based on AC-AC regulator with voltage boost with unity power factor function with PWM control is proposed. A mathematical model of the system is constructed. Results of investigation of the properties offered AC-AC regulators and their possible applications for stabilization of voltage in power supply autonomous systems, characterized by dual-range of change of the generated voltage are presented. The approach is based on the introduction of a high frequency variable voltage-additive supply voltage.

Transistor converters as a part of four-wire autonomous power generation system

The growth of power consumption of autonomous objects requires creation of new powerful and energy-efficient converters. This paper describes a new version of the autonomous power generation system alternating current and constant frequency with better energy-efficiency based on three-level converters. The results of computer simulation in the software package POWERSIM 9.0 are presented in the work. Two decisions to the problem of output voltage imbalance with unbalanced loads are proposed and compared in the paper.

AC voltage regulator with per phase switches

Transformerless AC voltage regulator with per phase switches which capable to increase of voltage without loss of system current quality is considered. Such a converter can be used as a voltage stabilizer or device for the quality of electricity improving. The results of mathematical modeling and analytical calculation of the rms values by the first currents and voltages harmonics are presented.