Renewable energy development in Uzbekistan: current status, problems and solutions

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.

Determination of the resistance of external parameters to the degradation of the parameters of silicon photocells with input nickel atoms

“…Recently, specialists in the field of nanotechnology and nanoelectronics have paid great attention to the technology of obtaining self-organizing impurity clusters with controlled structures [8][9][10][11]. In this regard, some interesting results on the implantation of Co and Ge ions in Si, as well as on the ion implantation of other atoms in semiconductor materials, should be noted [12][13][14][15][16][17]. As far as we know, technologies for obtaining self-organizing clusters of impurity atoms using diffusion technologies have not been sufficiently studied at present.…”

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

“…The power control of the voltage compensating devices is carried out depending on the voltage deviation. In this case, the control of the compensating devices must be coordinated with the regulation of the voltage value by other means [1,[9][10][11][12].…”

“…According to the daily schedule of reactive power consumption, it should be determined that one part of the capacitor banks is switched on continuously for 24 hours, and the second is switched on according to the load schedule only for a certain time t1 [10][11][12].…”

“…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

“…Thyristor reactive power compensators have a number of advantages, including automatic smooth maintenance of the set value of the power factor; high speed; smooth regulation of reactive power with limitation above the nominal value; the ability (due to the fast-acting smooth automatic compensation) to maintain the stability of the supply voltage. The nominal reactive power of the compensator is 125 kVAr, the nominal current is 190 A, the voltage of the network is 380 V, the value of the power factor settings is 0.3-1, the power regulation range is 25-125 kVAr [5,[6][7][13][14][15].…”