scholarly journals MODELING THYRISTOR TRANSDUCERS IN MATLAB ENVIRONMENT TAKING INTO ACCOUNT THE PECULIARITIES OF THEIR IMPLEMENTATION

2020 ◽  
pp. 150-165
Author(s):  
Andrey P. Chervonenko ◽  
Denis A. Kotin
Keyword(s):  
Electric Drive ◽  
Simulation Models ◽  
Power Converter ◽  
Synthesis Methods ◽  
Variable Speed ◽  
Digital Models ◽  
Variable Speed Drives ◽  
Electric Drives ◽  
Semiconductor Converters ◽  
Drive Systems

The authors present the study of synthesis methods for simulating the models of semiconductor rectifiers. Simulation of semiconductor rectifiers is quite studied today, but many authors carry out synthesis in their own unique way. The need to apply high technologies in variable speed drives with the development of mechanisms and working machines is growing, the automated variable speed drive is being introduced increasingly, making the energy substrate for aggregates and working machines. The relevance of this work is explained by the fact that currently developing technologies make it possible to manufacture more advanced semiconductor elements. The more relevant and significant is the study of refined digital models of electric drives containing semiconductor converters. This paper will summarize known approaches to the development of rectifiers’ digital models, as well as it will offer the authors’ own vision of this issue – taking into account as many individual features of semiconductor elements and the entire electric drive system as a whole as possible. The option proposed for consideration differs in that when developing in Matlab environment the parameters of real existing power elements and their digital analogues are consistent. The article also examines the issue of creating a digital model of the electric drive reverse system including a thyristor transducer and an engine; the transition characteristics of the refined model are illustrated. The result of this study is the analysis of different approaches to modeling semiconductor converters in electric drive systems. In this regard, a refined approach to modeling semiconductor rectifiers was considered, consisting of maximizing approximation of the model structure to real implementation, taking into account all elements, included in the structure of the ventilated electric drive. The study suggests that the developed simulation models can be used for the design of a real power converter in the conditions of a production enterprise.

Fundamentals of Solid-State AC Variable-Speed Drives

1969 ◽  
Vol 6 (01) ◽  
pp. 76-82
Author(s):  
Donald L. Schoen
Keyword(s):  
Solid State ◽  
High Performance ◽  
Practical Implementation ◽  
Variable Speed ◽  
Variable Speed Drives ◽  
Ac Drive ◽  
Ac Motor ◽  
Economic Trends ◽  
History Of ◽  
Drive Systems

Solid-state ac variable-frequency drives offer a new generation of high-performance, maintenance-free drive systems. The desire to use the rugged ac motor as a high-performance, variable-speed device goes back many years; however, its practical implementation had to wait three-quarters of a century for development of the silicon controlled rectifier. This paper opens with a brief review of the history of variable-speed dc and ac drive systems. Then the fundamentals of solid-state ac variable-speed drives are presented with emphasis on future technical and economic trends. The ac system is evaluated as an economic solution to providing basic functional drive requirements. The characteristics are compared with traditional high-performance dc systems. Finally, an attempt is made to describe the solid-state ac variable-speed drive of the future.

scholarly journals Study of spindle drives for boring machines

2019 ◽  
Vol 287 ◽  
pp. 01026 ◽  
Author(s):  
Marin Zhilevski ◽  
Mikho Mikhov
Keyword(s):  
Electric Drive ◽  
Machine Tools ◽  
Experimental Studies ◽  
Program Control ◽  
Electric Drives ◽  
Technological Processes ◽  
Boring Machines ◽  
Drive Systems

This paper examines the main requirements for the electric drive systems of a class of boring machines with digital program control. On this basis, a methodology for choice of the spindle drives is offered. The algorithm takes into account the specific features of the technological processes, the treated materials, the tools used and their wear, as well as the mechanical gear types. The experimental studies of the implemented electric drives for the spindle are presented and discussed. The research carried out and the results obtained can be used in the development of such drives for the studied class of machine tools.

scholarly journals A Performance Comparison of Aero-Derivative Gas Turbines and Electric Variable Speed Drives in Pipeline Compressor Duty on TransCanada’s Canadian Mainline

2000 ◽  
Author(s):  
Robert Betts ◽  
Guenther Duchon ◽  
David L. Williams
Keyword(s):  
Natural Gas ◽  
Gas Turbines ◽  
High Speed ◽  
Performance Comparison ◽  
Variable Speed ◽  
Variable Speed Drives ◽  
Natural Gas Transmission ◽  
Industrial Gas Turbines ◽  
Power Utilities ◽  
Drive Systems

Since the early 1960’s, the use of aero-derivative and industrial gas turbines on TransCanada’s natural gas transmission system has been the norm, with a total of 245 units installed to date. In 1996 and 1997 the company installed six high-speed, 30.6 MW, variable speed, electric drive systems. In the same time period eight aero-derivative gas turbines of similar power, with Dry Low Emissions, were installed. After an elapse of three years running time we now have enough data to compare the performance of the two different compressor drivers. A comparison of the performance of the two prime movers is made in a number of different ways. Operation and maintenance costs of the two different systems are considered, including the fuel costs of the natural gas and electricity, from three different Canadian electric power utilities.

scholarly journals Comparative Study of Energy Consumption and CO2 Emissions of Variable-Speed Electric Drives with Induction and Synchronous Reluctance Motors in Pump Units

Mathematics ◽  
2021 ◽  
Vol 9 (21) ◽  
pp. 2679
Author(s):  
Victor Goman ◽  
Vladimir Prakht ◽  
Vadim Kazakbaev ◽  
Vladimir Dmitrievskii
Keyword(s):  
Co2 Emissions ◽  
Induction Motors ◽  
Electricity Consumption ◽  
Electric Motors ◽  
Variable Speed ◽  
Pump Unit ◽  
Electric Drives ◽  
Power Drive ◽  
Design And Manufacturing ◽  
Drive Systems

This study carried out a comparative analysis of indicators of electricity consumption and CO2 emissions for four-pole induction motors (IMs) of efficiency classes IE3 and IE4 with a rated power of 2.2–200 kW in a variable speed pump unit. In addition, innovative IE4 converter-fed synchronous reluctance motors (SynRMs) were evaluated. The comparison was derived from the manufacturer’s specifications for the power drive systems (PDSs) at various rotational speeds and loads. The results showed that the emission indicators for IE3 class motors were significantly worse compared with IE4 class motors for low power ratings, which make up the vast majority of electric motors in service. This justifies expanding the mandatory power range for IE4 motors to at least 7.5–200 kW or even 0.75–200 kW, as it will dramatically contribute to the achievement of the new ambitious goals for reducing greenhouse gas emissions. In addition, the operational advantages of IE4 SynRMs over IE4 IMs were demonstrated, such as their simpler design and manufacturing technology at a price comparable to that of IE3 IMs.

Energy-Saving Control Algorithms of Electrically Driven Aggregates of Gas Transportation Technological Installations

2021 ◽  
Vol 64 (4-5) ◽  
pp. 24-29
Author(s):  
Oleg Kryukov ◽  
◽  
Igor Gulyayev ◽  
Dmitriy Teplukhov ◽  
◽  
...  
Keyword(s):  
Electric Drive ◽  
Optimal Level ◽  
Control Algorithms ◽  
Experiment Planning ◽  
Technical Documentation ◽  
Electric Drives ◽  
Efficient Management ◽  
Natural Gas Transport ◽  
Drive Systems ◽  
Energy Saving Control

Optimal principles of energy efficient management of natural gas transport using electric drive units along gas pipelines based on the existing regulatory and technical documentation are considered. The methodologi-cal basis of the control principles is the apparatus of the theory of experiment planning and invariant systems using strategies of low-population technologies and intelligent electric drive systems. The scheme and modern technical means of frequency-controlled electric drives and algorithms for optimal control of the main techno-logical units of compressor stations of the main gas transportation are presented, which ensure the stabiliza-tion of the parameters of the pumped gas at the optimal level.

Solution for Connecting Regenerative Electric Drive Systems to the Grid

2014 ◽  
Vol 875-877 ◽  
pp. 1003-1008
Author(s):  
Marian Gaiceanu
Keyword(s):  
Electric Drive ◽  
State Feedback ◽  
Power Converter ◽  
State Feedback Control ◽  
Integral Current ◽  
Current Controller ◽  
Ac Power ◽  
Input Filter ◽  
Drive Systems ◽  
Comparative Results

In this paper the topology of the grid-connected regenerative electric drive systems (REDS) and the performances of the integral state feedback current controller of the front-end three-phase power inverter are presented. The proposed control was successfully implemented by the author on a quasi direct AC-AC converter with Proportional-Integral current controllers and the simulation test has been performed for the modified integral state feedback current controllers based on the Matlab/Simulink software. The comparative results between the actual current controller topology and that of the conventional PI current controllers of the AC-AC power converter are reported. Moreover, the solution presented in this paper adds supplementary benefits to power system besides the conventional state feedback control: the designed input filter assures zero steady state error and an adequate component is added for the dynamic rejection of the load disturbance. Because it uses the integral component, the control structure has robust capabilities to disturbance actions.

scholarly journals Power Converters, Electric Drives and Energy Storage Systems for Electrified Transportation and Smart Grid Applications

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4142
Author(s):  
Lucian Mihet-Popa ◽  
Sergio Saponara
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Smart Grid ◽  
Electric Drive ◽  
Power Converters ◽  
Storage Systems ◽  
Special Issue ◽  
Electric Drives ◽  
Grid Applications ◽  
Drive Systems

The proposed special issue (SI) has invited submissions related to renewable energy, energy storage, power converters and electric drive systems for electrified transportation and smart grid applications [...]

Improvement of power supply quality at a modern mining and processing plant

2020 ◽  
pp. 82-86
Author(s):  
G. P. Kornilov ◽  
◽  
I. R. Abdulveleev ◽  
Yu. N. Kondrashova ◽  
K. E. Odintsov ◽  
...  
Keyword(s):  
Power Supply ◽  
Power Plants ◽  
Electromagnetic Compatibility ◽  
Economic Effect ◽  
Processing Plant ◽  
Variable Speed ◽  
Variable Speed Drives ◽  
Electric Drives ◽  
Basic Power ◽  
Chelyabinsk Region

The article discusses power supply quality in an industry in terms of Mikheevsky GOK—one the largest mining and processing plants in the Chelyabinsk Region and in Russia. The power supply quality is understood here as the reliability, economic efficiency and electromagnetic compatibility of basic power consumers. These objectives can be successively achieved through in-house power generation by gas piston power plants, as well as thanks to banks of supercapacitors capable to maintain power factor within the present ranges. The capital expenses connected with buying mill electric drives with capacity to tens megawatts are appreciably cut down owing to an original decision to use asynchronous motors with phase-wound rotors and liquid rheostats, which were commonly used at the dawn of adjustable electric drives. That decision allowed rejecting expensive variable speed drives at admissible power quality. Design and installation of capacitors with current-limiting coils neglected harmonics of lowvoltage variable speed drives and follow-up resonances, which resulted in overcurrents and in failure of the capacitors. Finally, the plant sustained considerable losses. The way out of this situation is shown by the research and modeling as series connection of currentlimiting coils and filters set to suppress outer lowest harmonics (5, 7, 11) in the canonical series. The economic effect and payback period of the implementation of the proposed solution are governed, first, by the extended failure-free operation of capacitors due to elimination of overcurrents and reduction in energy loss in wattless power flows and, second, by zero extra expenses connected with installation of filter-equipped coils. The study was supported by the President of the Russian Federation, Grant for Young Candidates of Sciences—MK-499.2020.8.

scholarly journals Energy Characteristics of Asynchronous Electric Drive

2019 ◽  
Vol 27 (1) ◽  
pp. 45-50
Author(s):  
Sergiej German-Galkin ◽  
Vladimir Sakharov ◽  
Dariusz Tarnapowicz
Keyword(s):  
Vector Control ◽  
Electric Drive ◽  
Mathematical Description ◽  
Energy Performance ◽  
Control Methods ◽  
Energy Characteristics ◽  
Electric Drives ◽  
Asynchronous Electric Drive ◽  
Drive Systems ◽  
Main Component

AbstractEnergy aspects are fundamental to the design of electric drive systems. This article describes energy performance for asynchronous electric drives based on various control methods. These electric drives comparison shows that vector control methods have a significant advantage over scalar control methods. The asynchronous electric drive mathematical description is based on vector control theory and main component method. Equations, obtained by mathematical description, allow calculating of the currents, voltages and electric power at the output when the electromagnetic torque and speed machine are set. Energy characteristics of the asynchronous drive were obtained with the use of the MATLAB-SIMULINK simulation program.

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