Cascade frequency converters control features

Воронцов, А. Г.; Glushakov, Vasiliy V.; Пронин, М. В.; Сычев, Ю. А.

doi:10.31897/pmi.2020.1.37

Cited by 10 publications

(7 citation statements)

References 4 publications

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“…Quantitatively, if the asynchronous mechanical speed ns is equal to fs at the synchronous frequency, the resulting electrical power is determined by the induced voltage, which is proportional to the relative speed difference between the synchronous rotation and the mechanical rotation range. The slip coefficient is determined using the expression for it [14][15][16]:…”

Section: Methodsmentioning

confidence: 99%

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Power Losses of Asynchronous Generators Based on Renewable Energy Sources

Toirov,

Taniev,

Hamdamov

et al. 2023

E3S Web Conf.

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This article discusses the possibility of using asynchronous generators in wind turbines, in particular asynchronous generators with phase rotors, in parallel with the network. Currently, due to the decrease in non-renewable energy sources around the world, the use of renewable energy sources, especially wind energy, is being considered. Also in this article, the power losses and energy balance of asynchronous generators with a phase rotor, all losses in an asynchronous generator, its efficiency, and torque are considered. In addition, a functional diagram of an asynchronous generator in a wind turbine has been developed, as have methods for simplifying calculations due to the generator substitution scheme. Due to this, methods for calculating the impedance of an asynchronous generator are given. With the help of an experimental research stand, the state of a number of parameters was analyzed during the parallel operation of an asynchronous generator with a phase rotor and a network. Taking into account that the indicators of the wind potential of land plots identified for the construction of wind turbines in Uzbekistan are higher than the average indicators of existing wind turbines in the world, it is assumed that the use of asynchronous generators in wind farms in the near future is considered promising.

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Section: Methodsmentioning

confidence: 99%

“…Here -is the slip coefficient and -is the rotor speed (rpm). The current stator frequency at the output is equal to fs, the rotor frequency will be related to the current frequency through fr [14,15]:…”

Section: Methodsmentioning

confidence: 99%

Power Losses of Asynchronous Generators Based on Renewable Energy Sources

Toirov,

Taniev,

Hamdamov

et al. 2023

E3S Web Conf.

View full text Add to dashboard Cite

show abstract

“…The simulation showed that the developed structure operated efficiently during start-up, operation, loading and unloading of the GMEU and SMEU (Figure 8). Then a power electronics unit, consisting of the rectifier, inverter, active rectifier and higher harmonics filters was modeled [20][21][22]. The simulation showed that the developed structure operated efficiently during start-up, operation, loading and unloading of the GMEU and SMEU (Figure 8).…”

Section: Efficient Functioning Of Developed Binary Energy Systemmentioning

confidence: 99%

System of Comprehensive Energy-Efficient Utilization of Associated Petroleum Gas with Reduced Carbon Footprint in the Field Conditions

et al. 2020

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This paper considers the issue of associated petroleum gas utilization during hydrocarbon production in remote petroleum fields. Due to the depletion of conventional oil and gas deposits around the globe, production shifts to hard-to-recover resources, such as heavy and high-viscosity oil that requires a greater amount of energy to be recovered. At the same time, large quantities of associated petroleum gas are extracted along with the oil. The gas can be utilized as a fuel for power generation. However, even the application of combined power modes (combined heat and power and combined cooling heat and power) cannot guarantee full utilization of the associated petroleum gas. Analysis of the electrical and heat loads’ graphs of several oil fields revealed that the generated thermal energy could not always be fully used. To improve the efficiency of the fuel’s energy potential conversion, an energy system with a binary power generation cycle was developed, consisting of two power installations—a main gas microturbine and an auxiliary steam turbine unit designed to power the technological objects in accordance with the enterprise’s power load charts. To provide for the most complete utilization of associated petroleum gas, a gas-to-liquid system is introduced, which converts the rest of the gas into synthetic liquid hydrocarbons that are used at the field. Processing of gas into various products also lowers the carbon footprint of the petroleum production. Application of an energy system with a binary power generation cycle makes it possible to achieve an electrical efficiency up to 55%, at the same time maintaining high efficiency of consumers’ energy supply during the year. The utilization of the associated petroleum gas in the developed system can reach 100%.

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“…One of these similar tasks is a task about the voltage dips elimination or compensation. A voltage dip is usually associated with the occurrence and ending of a short circuit or other emergency mode, also with connecting a powerful consumer to the electrical network [2][3][4]. In accordance with the requirements of this standard, a voltage dip is considered as electromagnetic interference, the intensity of it is determined by both voltage and duration.…”

Section: Introductionmentioning

confidence: 99%