Guaranteed and Reliable Excitation of Asynchronous Generator Coupled to Shaft of Vehicle

2021 ◽  
Author(s):  
Iurii Zachepa ◽  
Nataliia Zachepa ◽  
Oksana Khrebtova ◽  
Ihor Serhiienko ◽  
Dmytro Shokarov ◽  
...  
Keyword(s):  
Asynchronous Generator

scholarly journals Coupled Electric and Hydraulic Control of a PRS Turbine in a Real Transport Water Network

Water ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1194 ◽  
Author(s):  
Marco Sinagra ◽  
Costanza Aricò ◽  
Tullio Tucciarelli ◽  
Pietro Amato ◽  
Michele Fiorino
Keyword(s):  
Water Distribution ◽  
Rotational Velocity ◽  
Characteristic Curve ◽  
Velocity Variation ◽  
Hydraulic Control ◽  
Good Efficiency ◽  
Start Up ◽  
Asynchronous Generator ◽  
Hydropower Production ◽  
Power Recovery

Although many devices have recently been proposed for pressure regulation and energy harvesting in water distribution and transport networks, very few applications are still documented in the scientific literature. A new in-line Banki turbine with positive outflow pressure and a mobile regulating flap, named Power Recovery System (PRS), was installed and tested in a real water transport network for the regulation of pressure and flow rate. The PRS turbine was directly connected to a 55 kW asynchronous generator with variable rotational velocity, and coupled to an inverter. The start-up tests showed how automatic adjustment of the flap position and the runner velocity variation are able to change the characteristic curve of the PRS according to the flow delivered by the water manager or to the pressure set-point assigned downstream or upstream of the system, maintaining good efficiency values in hydropower production.

scholarly journals The Fuzzy Control for Rotor Flux Orientation of the double-fed asynchronous generator Drive

2014 ◽  
Vol 13 (8) ◽  
pp. 4707-4722 ◽  
Author(s):  
Mohammed TAOUSSI ◽  
Mohammed KARIM ◽  
Badre BOSSOUFI ◽  
Ahmed LAGRIOUI ◽  
Mohammed EL MAHFOUD
Keyword(s):  
Electrical Machine ◽  
Fuzzy Approach ◽  
Induction Generators ◽  
Doubly Fed Induction Generators ◽  
Asynchronous Generator ◽  
Rotor Flux ◽  
Machine Control ◽  
Simulation Results ◽  
Doubly Fed ◽  
Control Direction

In This paper we present a new contribution of fuzzy logic for electrical machine control. We are interested to the control direction of the rotor flux applied to Doubly-Fed Induction Generators (DFIG)At first, the principle of operation and modeling are applied to the DFIG is developed and introduced. Thereafter, the Fuzzy approach is applied to the FOC control, to improve the performance of the machines.Finally, the simulation results of the two commands are validates on the environment Matlab / Simulink followed by a detailed analysis.

scholarly journals Calculation of the Capacity for the Operation of a Mini-Energy Complex Based on an Inde-pendently Operating Asynchronous Generator

2021 ◽  
Vol 64 (1) ◽  
pp. 40-50
Author(s):  
S. V. Konstantinova ◽  
A. Yu. Kapustinskii ◽  
T. M. Yaroshevich
Keyword(s):  
Alternative Energy ◽  
High Speed ◽  
Frequency Converter ◽  
Operating Conditions ◽  
Electric System ◽  
Energy Complex ◽  
Alternative Energy Sources ◽  
Asynchronous Motors ◽  
Asynchronous Generator ◽  
Equivalent Circuit Parameters

The article present the analysis of the operation of the mini-energy complex (MEC) based on alternative energy sources. An asynchronous generator (AG) was taken as energy source. The IEC operates independently with standard power parameters without the use of a frequency converter. To operate independently, AG needs a source of reactive excitation current. Based on the calculations carried out and the results obtained with the use of the experimental facility,the operating conditions of the MEC with standard parameters of electricity under varying load have been analyzed. A characteristic feature of the autonomous MEC is the commensurate capacity of the generating device and consumers. Therefore, any power consumer on/off leads both to significant changes of local electric system parameters and affects the operation of the generator itself. In this article, the main attention is paid to the influence of three-phase motor load on stable AG operation. When the MEC operates independently, reliable self-excitation of the asynchronous generator and the start-up of consumers whose power is commensurate with the generating unit must be ensured. It is also necessary to ensure the maintenance of voltage stability, the possibility of automatic operation of the generating unit, and the preservation of its integrity in emergency modes. Thus, for stable MEC-based AG operation the nature of the load should be taken take into account, the parameters of the of the local grid should be known as well as the exact availability of consumers and their characteristics, and also equivalent circuit parameters of asynchronous motors. In addition, it is necessary to accurately calculate the capacity when changing the parameters of the electrical system, so as not to lose the self-excitation of the asynchronous generator, which is equivalent to disconnecting the entire load of the generator and causes a sharp increase in speed. To solve these problems, it is necessary to create a high-speed MEC control system.

scholarly journals MODELING OF COMPATIBLE WORK OF DISTRIBUTED POWER SOURCES OF ELECTRIC POWER AND CENTRALISED POWER SUPPLY

2018 ◽  
pp. 189-195
Author(s):  
Petro Lezhnyuk ◽  
Iryna Hunko ◽  
Juliya Malogulko ◽  
Iryna Kotylko ◽  
Lіudmyla Krot
Keyword(s):  
Power Supply ◽  
Power Plants ◽  
Solar Power ◽  
Energy Sources ◽  
Hydroelectric Power Station ◽  
Hydroelectric Power ◽  
Distributed Energy ◽  
Power Stations ◽  
Asynchronous Generator ◽  
Solar Power Plants

Urgency of the research. Current trends of distributed generation development in Ukraine indicate a rapid generation in-crease from renewable energy plants. Most developed countries gradually refuse from the fossil fuels use and invest more and more to the “green” energy. Therefore, there is a need for a detailed study of the operation conditions of distributed energy sources due to their instability, as well as the processes that arise in distribution electric networks with diverse types of distributed energy sources. Target setting. In the producing process of power energy by distributed energy sources due to the increase in their num-ber, there are situations where several renewable sources of energy operate to only one system of buses. Thus, such distributive networks acquire the features of a local power system, which complicates the control process of such systems, and also there is a problem with the electricity supply of consumers. Actual scientific researches and issues analysis. The analysis of publications suggests that in literature more attention is paid to studying the operating modes of solar power plants, or small hydroelectric power plants. However, almost no attention was paid to the study of their cooperation work. Uninvestigated parts of general matters defining. Only a few works are devoted to the study of the cooperation of the diverce sources of distributed energy sources in the local electrical systems. That is why, their impact on power distribution networks and on the grid in general has not been studied extensively. The research objective. In this article was considered the influence of asynchronous generators on small hydroelectric power plants on the operation modes of distribution electrical networks, and were investigated the processes that are occurring in local power systems with different types of distributed energy sources. The statement of basic materials. Based on the research results, was developed a computer model of a such system in the PS CAD software environment. Two solar stations and one small hydroelectric power station with an asynchronous generator were connected to the power supply. It was shown the simulation of two modes of operation: a joint operation of a small hydroelectric power station, two solar power stations and a power supply center; a joint operation of a small hydroelectric pow-er plant, two solar power stations and a power supply disconnected. Conclusions. As a result of computer simulation, it is shown that by switching on a small hydroelectric power plant with an asynchronous generator in the case of an emergency shutdown of centralized power supply, it is possible to restore the work of solar power plants, and thus partially or completely restore the power supply of consumers.

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