scholarly journals Calculation of transition processes in stabilized power sources on the basis of a single-phase serial current inverter

2020 ◽  
Vol 862 ◽  
pp. 062032
Author(s):  
Sh B Umarov ◽  
D D Rakhmatov
Keyword(s):  
Single Phase ◽  
Power Sources ◽  
Transition Processes ◽  
Current Inverter

scholarly journals Single-Phase Inverter Deadbeat Control with One-Carrier-Period Lag

Electronics ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 154
Author(s):  
Wei Yao ◽  
Jiamin Cui ◽  
Wenxi Yao
Keyword(s):  
Output Voltage ◽  
Single Phase ◽  
Harmonic Distortion ◽  
Voltage Source ◽  
Current Loop ◽  
Deadbeat Control ◽  
Additional Advantage ◽  
Power Sources ◽  
Pwm Inverter ◽  
Single Phase Inverter

This paper presents a novel digital control scheme for the regulation of single-phase voltage source pulse width modulation (PWM) inverters used in AC power sources. The proposed scheme adopts two deadbeat controllers to regulate the inner current loop and the outer voltage loop of the PWM inverter. For the overhead of digital processing, the change of duty of PWM lags one carrier period behind the sampling signal, which is modeled as a first-order lag unit in a discrete domain. Based on this precise modeling, the deadbeat controllers make the inverter get a fast dynamic response, so that the inverter’s output voltage is obtained with a very low total harmonic distortion (THD), even when the load is fluctuating. The parameter sensitivity of the deadbeat control was analyzed, which shows that the proposed deadbeat control system can operate stably when the LC filter’s parameters vary within the range allowed. The experimental results of a 2kW inverter prototype show that the THD of the output voltage is less than 3% under resistive and rectifier loads, which verifies the feasibility of the proposed scheme. An additional advantage of the proposed scheme is that the parameter design of the controller can be fully programmed without the experience of a designer.

scholarly journals Self-oscillations at the frequency of subharmonics in nonlinear electric chains and systems

2019 ◽  
Vol 139 ◽  
pp. 01054 ◽  
Author(s):  
M.I. Ibadullaev ◽  
A.N. Tovbaev ◽  
A.Zh. Esenbekov
Keyword(s):  
Single Phase ◽  
Experimental Studies ◽  
Power Lines ◽  
Equivalent Model ◽  
Critical Parameters ◽  
Steady State Mode ◽  
Power Sources ◽  
Electric Circuits ◽  
Three Phase ◽  
Extensive Class

It is known that the occurrence and existence of autoparametric oscillations (AIC) at the subharmonic frequency (GHC) in power lines (power lines) and in power supply systems is extremely undesirable, since they cause ferroresonant overvoltages at different frequencies. At the same time, there is an extensive class of nonlinear electric circuits in which the excitation of the AIC at the frequency of the SGC forms the basis of frequency-converting devices serving as secondary power sources. It is shown that single-phase-three-phase nonlinear systems are, to one degree or another, equivalent circuits of power lines, the main elements of which are: longitudinal compensation capacitors, transverse compensation reactors, and transformers with non-linear characteristics. The regularities of the excitation of the GCC at the frequency (ω / 3) of the power lines were studied, theoretical and experimental studies of the equivalent model of single-phase-three-phase circuits with nonlinear inductance were carried out. For a theoretical analysis of the steady-state mode of SGK at a frequency (ω / 3) with inductive coupling, the frequency- energy approach is used. The conditions of existence and critical parameters of the circuit are determined, and the mechanism of the appearance of the SGC at the frequency (ω / 3) is also studied.

PARALLEL OPERATION OF HYDROGEN POWER SOURCE WITH CURRENT INVERTER AND SYNCHRONOUS GENERATOR IN SELF-CONTAINED ELECTRIC-POWER SYSTEMS OF ALTRENATING CURRENT

2017 ◽  
pp. 81-91
Author(s):  
Anatoliy Burkov ◽  
Alexander Marykyn ◽  
Victor Nikityn ◽  
Alexander Tretyakov
Keyword(s):  
Power Plant ◽  
Power Systems ◽  
Power System ◽  
Electric Power ◽  
Synchronous Generator ◽  
Power Source ◽  
Electric Power System ◽  
Parallel Operation ◽  
Power Sources ◽  
Current Inverter

Objective: The data on the synthesis of a combined electric power source for a self-contained electric-power system with a diesel generator (turbo-generator) and hydrogen power source was presented in the article. Objective: To justify the structure and parameters of a power channel of a self-contained electric power plant based on power augmentation with parallel operation on the total load of two electric power sources – synchronous generator and hydrogen power source. Methods: Mathematical modeling of the main power processes was applied, including the processes of active and reactive power distribution control in a self-contained electric power system with parallel operation of synchronous generator and hydrogen power source. Results: The tasks of structural synthesis of a combined power plant with current-based electronic inverter application, as well as justifications of power-efficient operation criteria and control algorithms of a self-contained electric power system with minimized power interchange between synchronous generator and current inverter were set and solved. Practical importance: New results are recommended to use in the design of power systems with improved technical and economic as well

scholarly journals Evaluation of Selective Harmonic Elimination Pulse Width Modulation Technique for Unipolar Single-Phase H-Bridge Inverter: Comparative Study

2018 ◽  
Vol 9 (3) ◽  
pp. 1157
Author(s):  
Hussain Attia
Keyword(s):  
Comparative Study ◽  
Pulse Width ◽  
Single Phase ◽  
Pulse Width Modulation ◽  
Switching Frequency ◽  
Harmonic Elimination ◽  
Ideal Solutions ◽  
Selective Harmonic Elimination ◽  
Single Phase Inverter ◽  
Current Inverter

<span style="color: black; font-family: 'Times New Roman',serif; font-size: 9pt; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA; mso-bidi-font-style: italic;">In this paper, a detailed comparative study about evaluating the single phase inverter performance based on selective harmonic elimination pulse width modulation (SHE PWM) technique is presented. Set of nonlinear equations are derived, four groups of switching angles are calculated using the numerical iterative method of Newton-Raphson. These angles are representing the ideal solutions to eliminate the low order harmonics from inverter output voltage and load current. Inverter effectiveness is evaluated by comparing the performance based on SHE PWM and based on the conventional constant switching frequency PWM (CSF PWM) technique. Same parameters setting is selected with considering the constant switching frequency value for each case separately as equivalent to the number of switching angles. Moreover, different rated load powers are investigated to explain the merit of SHE PWM within high power applications. MATLAB / Simulink simulation results are clearly indicating the priority of the SHE PWM at all groups of calculated angles and at different load power as well.</span>

scholarly journals A single-phase axially-magnetized permanent-magnet oscillating machine for miniature aerospace power sources

AIP Advances ◽  
2017 ◽  
Vol 7 (5) ◽  
pp. 056659 ◽  
Author(s):  
Yi Sui ◽  
Ping Zheng ◽  
Luming Cheng ◽  
Weinan Wang ◽  
Jiaqi Liu
Keyword(s):  
Permanent Magnet ◽  
Single Phase ◽  
Power Sources

scholarly journals First-Order and High-Order Repetitive Control for Single-Phase Grid-Connected Inverter

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Cheng Guo ◽  
Linzhen Zhong ◽  
Jun Zhao ◽  
Guanbin Gao ◽  
Yingbo Huang
Keyword(s):  
Single Phase ◽  
Repetitive Control ◽  
Clean Energy ◽  
High Order ◽  
Dynamic Responses ◽  
Power Sources ◽  
Phase Inverter ◽  
First Order ◽  
Single Phase Inverter ◽  
Grid Connected Inverter

With the increasing demand of users for power sources and quality, how to provide high-quality renewable clean energy has become a key issue of power electronics. The main idea of this paper is to develop a composite control including a PI control and repetitive control for a single-phase grid-connected inverter to eliminate the effects of harmonics, which can obtain better steady-state and dynamic responses of the single-phase inverter system and reduce the net current harmonics. The modelling of a single-phase inverter is first introduced; then a first-order repetitive control is developed for the proposed grid-connected inverter. Moreover, a high-order repetitive controller is adopted to further improve the robustness against the uncertainties in the period of signals. The stability and performance analysis are given for the first-order repetitive control and high-order repetitive control. Finally, comparative simulations are conducted in a circuit-level inverter model, which show the effectiveness of the proposed method.

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