Abstract
The problem of voltage sag and swell is one of the major reasons for low-quality power in the distribution system. Normally, it results from the system’s faults, including line-to-ground and line-to-line, non-linear characteristics of loads and sources. Its effect is very serious for the critical loads as their performance is very sensitive to the variation in voltage. The stabilization of voltage is a mandatory requirement in such a situation. The correction of such problems requires the addition and subtraction of the voltage once the line voltage is decreased and increased. This behavior of the correcting voltage is ensured by the use of voltage controllers that can convert a constant input voltage into a non-inverted and inverted variable form. Their voltage gains depend on the depth level of the problem. The voltage buck and boost capabilities of the AC voltage stabilizers can tackle the problems having any depth level. The smartness of such a system depends on the number of electronic devices as they are the key elements in the power conversion system. Therefore, this research proposes a new AC voltage controller with fewer solid-state devices. Its overall impact is low volume and cost. The validation of the introduced approach is ensured with the help of simulation modeling and results gained from the practical setup.
Highlights
The development in solid-state electronics is playing a major contribution to the development of modern society
The main source of their incorrect outputs is the decrease and increase in values of the supplied voltage. This problem is regarded as voltage sag if the line rms voltage is reduced
The other type of voltage variation is characterized as voltage swell in which the line rms voltage is boosted to 110% to 180% of its normal rated value for a few milliseconds [4]. The correction of this situation requires injecting the voltage of opposite polarity of the line that can obtain from the inverted output of the voltage controllers
Summary
The development in solid-state electronics is playing a major contribution to the development of modern society. To 20%) with respect to nominal rated rms values during some input voltage cycles [3] This situation requires the addition of voltage in the line that may achieve with the non-inverted output of the voltage stabilizers. The other type of voltage variation is characterized as voltage swell in which the line rms voltage is boosted to 110% to 180% of its normal rated value for a few milliseconds [4] The correction of this situation requires injecting the voltage of opposite polarity of the line that can obtain from the inverted output of the voltage controllers. These problems are very frequent and challenging in power distribution systems during fault conditions [5,6]. They may be resolved by adding and subtracting the voltage generated by the voltage controllers
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