Abstract
Many electrical appliances are used in production and in everyday life, which include elements that are extremely sensitive to voltage deviations from acceptable values. Failure in their work can cause equipment failure or a breakdown in technological processes. There are a number of technical solutions to solve this problem, one of which is the using of voltage control devices such as boost transformers. The principle of operation of booster transformers is the introduction of a longitudinal EMF into the electric circuit, which provides booster. The choice of voltage regulation devices consists in determining its power and the required transformation ratio. The latter needs some justification, because it cannot be formally accepted: if it is necessary to increase the voltage, for example by 5%, it is enough to introduce a longitudinal EMF of 5% of the nominal voltage into the electric circuit. This is due to the fact that with increasing voltage from the load side, the power consumption also increases, which causes an increase in voltage drop compared to modes in the absence of voltage regulation devices. Thus, the load will receive a slightly lower voltage level in comparison with the desired one.
Highlights
It is extremely difficult to maintain the voltage at the consumer unchanged and equal to the nominal
The following standards are established for the above-mentioned indicators of electric power quality: positive and negative voltage deviations at the electric energy transmission point must not exceed 10% of the nominal or agreed voltage value during 100% of the time interval of one week
We model the circuit diagram in the MATLAB/ Simulink environment to plot the dependences of the power consumption on the voltage level, taking into account the different operating conditions of the induction motor [4,5,6]
Summary
It is extremely difficult to maintain the voltage at the consumer unchanged and equal to the nominal. Electric power quality indicators related to slow changes in the supply voltage are negative δU(-) and positive δU(+) deviations of the supply voltage at the point of transmission of electrical energy from the nominal value, %:. The following standards are established for the above-mentioned indicators of electric power quality: positive and negative voltage deviations at the electric energy transmission point must not exceed 10% of the nominal or agreed voltage value during 100% of the time interval of one week. Adjustable autotransformers, voltage boosting transformers and linear regulators can be classified as booster devices [20] Such devices act on the resulting voltage at the consumer or receiver by creating additional EMF, the vector of which is superimposed on the main voltage according to, counter or at some angle, as is the case in some schemes of.
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