Study of Solar Radiation and Wind Characteristics in Various Regions of Uzbekistan

Abstract

The article discusses methods for monitoring solar radiation and wind characteristics and practical principles of use. The efficiency of using solar and wind energy largely depends on how accurately the design took into account specific data on the arrival of solar radiation or wind speed at the site of the intended operation of installations. The instability of the primary energy supply makes it necessary to supply the installations with accumulators, the choice of capacity of which also affects the size of the energy receivers, and therefore the technical and economic indicators.

Development and experimental study of circuits of contactless device for automation of compensation of reactive power of capacitor batteries

“…The requirement of consumers of industrial enterprises to ensure a minimum deviation of the operating voltage from the nominal can also be satisfied by adjusting the power of the capacitor bank depending on the voltage 1-4, 16. In this case, capacitor banks, along with the main function of increasing the reactive power factor of the enterprise, are also used to regulate the voltage [6][7][8]17].…”

“…During the hours of minimum load, when the voltage is high, the inclusion of capacitor banks leads to an excessive increase in voltage. Therefore, to maintain the rated voltage on the substation buses, the capacitor banks are disconnected when the voltage rises above the permissible value, and when the voltage decreases, they are turned on [6][7][8][9]18].…”

“…To ensure the most economical operating modes of power supply systems, power control of compensating devices is used. The regulation of the reactive power generated by the capacitors can be carried out in steps by dividing the batteries into parts The greater the number of such steps, the more perfect the regulation, but the greater the capital cost of installing switches and protective equipment [6][7][8].…”

“…The operating mode of the compensating devices is determined taking into account the permissible voltage deviations at the terminals of the electric power receivers [9]. Voltage, load current, reactive power directions, power factor, phase angle between the supply voltage and load current, and time can be used as control parameters [7][8][9][10].…”

New solutions for controlled compensating devices

“…The static device of reactive power sources consists of a capacitor bank and a special regulating element made of inductance with semiconductor valves. The total reactive power of such an installation QK changes due to the variable component of the reactive power of the inductors QL, which is subtracted from the constant component of the reactive power of the capacitor bank QC at a constant line voltage UL [4,7,[11][12][27][28][29]:…”