Non-contact controlled voltage stabilizer for power supply of household consumers

Abstract

The article discusses the principle of operation of an optoelectronic voltage relay for switching windings of a boost voltage transformer of a voltage stabilizer. Based on the simulation of the proposed optoelectronic contactless voltage stabilizer using the MATLAB R2014a program, it was determined that the change in the shape of the output voltage curve is close to a sinusoid and coincides with the results obtained by the experimental path. When modeling a voltage stabilizer, the structure of the circuit does not change, but the parameters of the resistor elements corresponding to the open or closed state of the semiconductor device at the time of switching the vents change. The characteristic of voltage changes “input-output” and the analysis of existing voltage stabilizers on the principle of “quality voltage” in rural areas

Study of the state of the issue of increasing the quality of electric energy in the power supply systems

“…Electric motors are used in drives of various production mechanisms. In installations that do not require speed control during operation, AC electric drives are used: asynchronous and synchronous electric motors [6,7,12].…”

“…A decrease in voltage also leads to a noticeable increase in reactive power lost in the leakage reactances of lines, transformers and induction motors [7,13,16].…”

“…A 1% increase in voltage leads to an increase in the reactive power consumption of the converter by about 1-1.4%, which leads to a deterioration in the power factor. At the same time, other indicators of valve converters with increasing voltage improve, and therefore it is beneficial to increase the voltage at their terminals within the permissible values [7,8,16].…”

Basic energy-saving principles at the enterprises of public catering

“…A relatively low value of the power factor in the network was recorded, for phases " B "and" C", from 0.67 to 0.86 (especially for phase" B " 0.67). This means that about 65-75% of the current (power) is reactive and leads to a significant increase in power losses [19][20][21]. The total active power consumption ranged from 7 kW to 11 kW.…”

Pole-changing motor for lift installation

“…For pole switching, contactors with open poles are usually used, which, with a large number of switching operations, quickly fail and prevent the normal operation of the drive. Therefore, it is advisable to develop contactless switches based on semiconductor elements to ensure the normal functioning of such mechanisms in various operating modes [5,18,19]. At the same time, an urgent issue is the study of the operation of such engines in dynamic operating modes [6].…”