Modeling of asynchronous motor operation modes for the correct selection of voltage regulation devices

Akhmetshin, Azat; Marin, George; Mendeleev, D. I.

doi:10.1051/e3sconf/202017801015

Cited by 15 publications

(4 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One of the main reasons for failure of electric motors is moisturization of winding insulation. For this reason, up to 20-30% of electric motors fail annually [1][2][3][4][5][6][7]. Our studies show that for air humidity of 100% and temperature of 35 °C, the insulation resistance R drops to a critical value of 0.5 MΩ within 9-10 days.…”

Section: Introductionmentioning

confidence: 94%

Destruction of electrical insulating structures of electric motors during various drying techniques

et al. 2020

View full text Add to dashboard Cite

The paper discusses the problem of drying electric motors in a humid environment. The study considers the influence of oven, current, electroosmotic, convective-electroosmotic drying methods on defect formation in electrical insulating materials of electric motors. Thermal oven drying destroys the insulation system of electric motors for an order of magnitude higher than other methods and has a lot of negative consequences. The electroosmotic and convective-electroosmotic drying processes do not have disadvantages of thermal drying methods, or these disadvantages are kept to a minimum. It is shown that electroosmotic and convective-electroosmotic drying result in a uniform distribution of moisture content in the volume of electrical insulating materials. This reduces the likelihood of dangerous stresses and subsequent cracking. Electroosmotic and convective-electroosmotic drying have little effect on defect formation processes in the insulation system of electric motors and, thus, almost do not reduce the service life of electric motors.

show abstract

Section: Introductionmentioning

confidence: 94%

Destruction of electrical insulating structures of electric motors during various drying techniques

et al. 2020

View full text Add to dashboard Cite

show abstract

“…1 it may be concluded that TS, loaded by less than 30%, constitute approximately 80% of cases, among which 53% are loaded by less than 15%. Consequently, transformers operate with low efficiency [4,5] and high losses [14]. Fig.…”

Section: Regional Differencesmentioning

confidence: 99%

“…For entrepreneurs -reducing the cost of technological connectivity to electrical network. 4. For the population and businesses -the possibility of lowering or maintaining existing electricity prices, as well as reducing the cost of commercial and residential real estate by reducing the cost of construction of electricity networks.…”

Section: Regional Differencesmentioning

confidence: 99%

Monitoring of Electrical Consumption, Including Self-Isolation During the COVID-19 Pandemic

Soluyanov¹,

Fedotov

Akhmetshin

et al. 2020

2020 Ural Smart Energy Conference (USEC)

Self Cite

View full text Add to dashboard Cite

To date, one of the most relevant tasks is a justified calculation of the electrical capacity of residential buildings and public facilities. Studies conducted by the "Roselectromontazh" Association have shown a significant difference between the actual and calculated electrical capacity, which is further confirmed by the reports of electric grid companies. In some cases, there is a 3-fold difference. This occurs due to the emergence of a sustainable culture of electricity consumption and the use of highly energy-efficient devices. In 2019, the results of the research work were taken into account in the regional urban planning standards of the Republic of Tatarstan. On average, the normative values have been reduced by 2 times. This enabled a significant reduction in the difference between the actual and calculated electrical capacity. From 2020 onwards, leading construction companies in the Republic of Tatarstan are applying up-to-date values to decrease utility services' construction costs. For power grid companies the savings consist of reduction of electrical energy losses and "locked electrical capacity" and the elimination of inefficient investments. It is important to note that specific values of electrical load were calculated taking into account summer and winter peaks in order to exclude the emergencies. However, it was impossible to predict a time when people would need to stay self-isolated at home to prevent the spread of severe acute respiratory syndrome-related coronavirus SARS-CoV-2 (COVID-2019). Corresponding diagrams relative to 2019 were constructed to determine the impact of the electricity consumption of residential buildings during lockdown.

show abstract

“…For example, the usual task of power supply systems with quiescent load is to reduce the short-circuit currents. This allows one to select the elements of the electrical network, designed for lower thermal and dynamic loads, to extend the service life of the switching protection equipment, to reduce capital investment and damage caused by an accident [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the operating modes of the resonant current-limiting device

et al. 2020

View full text Add to dashboard Cite

Decreasing of short-circuit currents in power supply systems enables the usage of less expensive switching-protective devices with a lower breaking capacity and reduction of damage from the consequences of emergency events. In electrical networks of low, medium and high voltage classes, resonant current-limiting devices are used to solve this problem, along with other technical solutions. However, these devices have unsatisfactory weight and dimensions, high cost and other disadvantages. The technical and economic indicators of such devices can be improved through the use of a coil-capacitor (coilcap). Coilcap is a passive element of an electric circuit, which simultaneously possesses inductivecapacitive properties and performs the functions of a reactor and a capacitor in a single technical object. This paper presents a functional diagram of the implementation, design, operating principle and mathematical description of a resonant current-limiting device based on a coilcap. Physical modeling of the steady-state modes of the device (normal mode and current limiting mode) was carried out, and the possibility of limiting short-circuit currents due to the use of a coilcap was confirmed. The practical application of a resonant current-limiting device based on a coilcap can be effectively combined with switching-protective and current-limiting disconnecting devices, relay protection, and automation equipment.

show abstract

Modeling of asynchronous motor operation modes for the correct selection of voltage regulation devices

Cited by 15 publications

References 10 publications

Destruction of electrical insulating structures of electric motors during various drying techniques

Destruction of electrical insulating structures of electric motors during various drying techniques

Monitoring of Electrical Consumption, Including Self-Isolation During the COVID-19 Pandemic

Experimental study of the operating modes of the resonant current-limiting device

Contact Info

Product

Resources

About