Determination of the transmission capacity of a 500-kV line equipped with flexible electric power transmission devices

Ignatenko, Ivan; Konstantinov, A.M.; Demina, Lyudmila

doi:10.3103/s1068371216020097

Cited by 7 publications

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Energy-efficient pumping installations at agricultural production facilities

Platonov¹,

Fedorov²

2019

IOP Conf. Ser.: Earth Environ. Sci.

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The article presents the method of the feasibility study of various methods of regulation on pumping installations of agricultural objects. It was found that the best results are observed in electric drives with frequency converters and valve cascade: here the total losses Qmin mode are only about 10% of the base value, which is explained by minimal losses in pipelines. There is no need to use valves at all. It is shown that with parametric control of the speed of an asynchronous electric drive with a phase-rotor, the loss in hydraulic elements (pump and network) has the same value as with frequency control (about 10% of the base value), but slip losses increase by 12%

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Energy-efficient pumping installations at agricultural production facilities

Platonov¹,

Fedorov²

2019

IOP Conf. Ser.: Earth Environ. Sci.

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Improving the accuracy of electric mechanisms for the manufacture of blanks of agricultural objects

Zagoskin¹,

Tsirkunenko

2019

IOP Conf. Ser.: Earth Environ. Sci.

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The principles of increasing the precision characteristics of an agricultural electric drive are presented in this article. There are achieved by analyzing the requirements for the electric drive by the operating body. The scientific work has a relationship between the parameters of the quality of rolling the blanks for agricultural facilities and the precision parameters of the electric drive in terms of overshoot parameters and absolute positioning accuracy. It is shown that this dependence is non-linear in the position electric drive and depends more on the size of the overshoot and a significantly smaller ratio from absolute accuracy. The permissible overshoot value depends on the absolute accuracy and has range from 5 to 10%. The largest value of the overshoot is achieved with absolute positioning accuracy with an error not exceeding 2%. The obtained values of the control parameters can be successfully applied in the design of the position agricultural electric drive. So, if you provide sufficient positioning accuracy with an error not exceeding 2%, which is achieved by the use of position sensors with a resolution of at least 10 000 pulses per revolution, the modeling electric drive in the position loop can be adjusted with an allowable overshoot of 10%, and therefore, increased system performance while maintaining quality control indicators.

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