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This paper presents the fuzzy mathematical model of transfer criteria of distribution network to 20 kV voltage by analyzing the parameters of the distribution network. The model used for the rapid analysis of priority network licensees to determine the order of their funding. As the basis of the synthesized criteria model was accepted a linguistic definition of priority transfer distribution network...
Parametric synthesis of three-loop circuits of the reservoir capacitor in the thyristor generator of discharge pulses with controllable voltage feedback is carried out. The synthesis aim was the optimization of average pulse power in the load with electric resistance, which can change from the one discharge pulse to another one. Increase in average pulse power in the load is chosen as synthesis objective...
The analysis of electromagnetic processes in an electric circuit with the semiconductor converter is presented in the paper. The mathematical model for the analysis of electromagnetic processes in the semiconductor converter with power width regulation of the output voltage has been created. The problem of using the method of multiple parameter modulating function has been solved in the research work.
Using a pulse density modulation (PDM) to regulate a load current of a resonant voltage-source inverter causes fluctuation of a current amplitude. The paper proposes a software phase-locked loop (SPLL) of control system in a resonant voltage inverter with PDM for induction heating equipment. The proposed SPLL changes a dead-time between control pulses of inverter transistors, taking into account current...
Possibility of decreasing energy losses, caused by mutual influence of nonuniform electric grids, operating in parallel, by means of introduction of phase shift transformer in previously determined optimal branch of the grid and usage of its optimal angle for current operation mode is proved on the example of 230/6 kV electric gride. It is also proved that the application of phase shift transformer...
Two new nonlinear controllers for voltage source AC-DC converter are presented. The first control algorithm is based on control of the system stored energy and guarantees a global exponential stability of the DC voltage regulation together with decoupled stabilization of the input reactive power on zero level. Second result is a simple feedback linearizing controller, which is developed using a two...
The methods of determining the number of direct lightning strikes in overhead lines with protected wires. The calculation of the number of direct lightning strikes in overhead lines. Experimental study on a large-scale model of supporting change in the number of direct lightning strikes in overhead lines, depending on the type of wire. Identified lightning capture zone of overhead lines for medium...
This paper describes the application of regularities of power-law distribution in form of its modification — technical cenosis approach which allows to provide the efficient functioning of capacitor banks in systems of electrical technology and to improve the efficiency of these systems. The application of the additional technical cenosis criterion allows the obtaining of the practical solutions in...
The paper presents a novel field oriented speed sensorless vector control algorithm for induction generators. The proposed controller exploits the concept of direct field orientation and provides asymptotic DC-link voltage regulations when DC-load current is constant or slowly varying. An output-feedback linearizing technique is employed for the voltage controller design. The proposed control algorithm...
This paper deals with the investigation of flux and stator current maximal values of autonomous induction generator with DC link voltage and rotor angular speed below the rated values. The dependence of the maximum flux from DC link voltage is analytically determined based on the stator circuit electrical equilibrium equations in a steady state. The maximum value of the stator current active component...
This paper represents design procedure of control system for interleaved bidirectional dc-dc converter. Dynamic model of the converter was compiled with help of steady-state analysis. The theoretical results were verified by means of modeling in PSIM package.
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