Calculation of the economy of electric energy in industrial electrical supply systems

Gracheva, Elena; Gorlov, A. N.; Шакурова, З. М.

doi:10.30724/1998-9903-2020-22-2-65-74

Cited by 18 publications

(7 citation statements)

References 5 publications

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“…Существующие методы оценки энергоэффективности работы водоканалов основаны во многом на анализе работы единичных электроприемников [1,2,3] и сравнении основных энергетических показателей с номинальными параметрами или с данными современного и технологичного оборудования. Для комплексной оценки систем водоснабжения и водоотведения в целом используются методы, учитывающие чувствительность изменения удельного расхода электропотребления при отклонении объемов производственной программы [4].…”

Section: введение и литературный обзорunclassified

Increasing the energy efficiency of water inlets by re-using washed water and reducing filter cycle time

Kapansky

2021

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

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PURPOSE. The purpose of this article is to study the search for ways to reduce energy consumption and develop methods for increasing the energy efficiency of water utilities. The studies reflected in the article are based on the results of an energy survey of a water utility in the city of Gomel (Republic of Belarus), one of the tasks of which is the search for reserves for saving fuel and energy resources by reducing technological water consumption. The article presents the results of research on the example of two water intakes «Iput» and «Sozh». METHODS. When solving the problem, the methods of mathematical statistics were used, including the method of analysis of variance to assess the significance of the effect of water flushing on reducing the iron content. RESULTS. The article discusses possible ways to reduce energy costs by reducing technological water consumption, which are used to flush filtering structures. The main activities are the following: changing the filter flushing schedule with increasing the filter cycle; the use of water-air flushing; reuse of wash water. The article formulates a hypothesis: filter flushing leads to a decrease in the iron content in the water, i.e. improving the quality of cleaning. CONCLUSION. An increase in the energy efficiency of water intakes, along with measures to modernize and optimize the operation of pumping equipment, is achieved by saving water resources and, accordingly, the cost of electricity for their extraction, which is necessary when flushing the filter materials of the deferrization station. The assumption about a possible increase in the filtration cycle was the lack of significance of the influence of washing on the decrease in the iron content, which indicated the presence of a significant reserve of the washing cycle. The use of combined water and air flushing contributes to a significant reduction in both technological water consumption (40.1%) and electricity consumption (38.8%). The energy saving potential due to the reduction of technological energy consumption for lifting water for the purpose of flushing reached 89857 kWh / year for the studied water intake.

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Section: введение и литературный обзорunclassified

Increasing the energy efficiency of water inlets by re-using washed water and reducing filter cycle time

Kapansky

2021

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

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“…Одной из современных проблем передачи электроэнергии (ЭЭ) по электрическим сетям является обеспечение потребителей ЭЭ высококачественной энергией 1, 2 . Важнейшим показателем качества электроэнергии является отклонение напряжения на зажимах электроприемников, возникающее по причине потерь напряжения при передаче ЭЭ по линии электропередачи (ЛЭП), которое приводит к нарушению работы электроприемников, снижению производительности технологического оборудования и сроков службы электрооборудования [1][2][3].…”

Section: Introductionunclassified

Identification of quality and energy efficiency of low-voltage power transmission

ZAGINAILOV

2024

Agricultural Engineering

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Providing consumers with high quality electric power with minimum transmission losses is one of the problems of electric power transmission through power grids. Increasing reactive power of electric consumers, estimated by the load power factor, results in an increase in electricity losses and quality deterioration. To evaluate the influence of the load power factor on the transmission of active load power and to determine the quality and energy efficiency of electricity transmission through power lines, the authors analyzed the change in the parameters of one phase of a three-phase network without compensation and with reactive power compensation. The set task was solved using methods of calculation of linear electric circuits of alternating current, according to the given values of total or active load power, its resistance and the resistance of power line wires. Then the processes of power transmission in low-voltage electric networks of alternating current were simulated using the Electronics Workbench software. The authors take a case of the electric power system consisting of consumers’ (load) electric receptors receiving power supply through the power line connected to the low-voltage busbars of the power transformer. They prove that its parameters are mainly changed when changing the value of the system current determined by the load and transmission line resistances. The quality of low-voltage electrical energy transmission depends on the voltage loss in the power line wires and is determined by the load current and its full resistance. The energy efficiency of electrical energy transmission depends on the power loss in the power line wires and is determined by the amount of active power consumed by the load and the ratio of the active resistance of the power line and the load.

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“…Доля регулируемых приводов в России не превышает 15-20% от всего объема, что является существенной проблемой на пути достижения цели повышения эффективности использования энергоресурсов. Таким образом, приоритетным направлением является внедрение высокоэффективных, производительных систем регулируемого электропривода [2].…”

Section: Introductionunclassified

“…Главным аспектом в процессе модернизации электрооборудования является разработка систем управления электроприводами, отвечающих требованиям производственного процесса [2,3,4]. Важным фактором является возможность повышения производительности, снижение потребления ресурсов, а, также, надежность внедряемых систем.…”

Section: Introductionunclassified

Control system for a frequency synchronized asynchronous electric drive

Meshcheryakov

Sibirtsev

Valtchev

et al. 2021

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

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THE PURPOSE. In controlled AC drives used on continuous-action mechanisms, which include conveyors, conveyors, cranes, the most widespread are asynchronous motors with a phase rotor, controlled mainly along the rotor circuit using various regulators with low energy efficiency. To improve the energy efficiency of an electric drive based on ADFR, it is proposed to develop a control system that combines the principles of frequency control of the motor along the stator circuit and powering the rotor circuit with constant voltage, which allows the electric drive to be considered synchronized. METHODS. The presence of a DC link in the frequency converter makes it possible in principle to connect the rotor winding in series to this link. However, in order to ensure the frequency principle of regulating the output characteristics of the electric drive, it will be necessary to regulate the rectified current at the input of the inverter and, accordingly, in the rotor windings, which will require a significant change in the standard control system of the frequency converter. The use of an additional adjustable switch in the DC link is proposed. RESULTS. The study of the proposed non-standard control system for a frequency asynchronous synchronized electric drive was carried out by the method of simulation modeling in the Matlab Simulink software package. CONCLUSION. A control system for a frequency asynchronous synchronized electric drive has been developed and investigated on a computer model. A correction system is proposed that allows maintaining a constant value of the load angle in the starting mode. The scalar system of relay frequency control of the electric drive is supplemented with vector correction of the variables, which makes it possible to continuously provide the necessary mutual orientation of the stator current vectors and the rotor flux linkage.

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Calculation of the economy of electric energy in industrial electrical supply systems

Cited by 18 publications

References 5 publications

Increasing the energy efficiency of water inlets by re-using washed water and reducing filter cycle time

Increasing the energy efficiency of water inlets by re-using washed water and reducing filter cycle time

Identification of quality and energy efficiency of low-voltage power transmission

Control system for a frequency synchronized asynchronous electric drive

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