Capacitor bank evaluation for power factor improvement of an industrial plant’s distribution network with non-linear load
The paper focuses on the capacitor bank evaluation problem for power factor improvement of an industrial plant’s distribution network containing non-linear load. The problem is important due to large scale integration of power electronics into electrical supply systems of industrial plants including oil and gas enterprises. It is shown that the choice of the capacitor bank depends on the current harmonic spectrum consideration. The estimation of the equivalent circuit for the whole current harmonic spectrum and for the first current harmonic only has been carried out with the use of the classical ways of electric circuit analysis. The network parameters with the capacitor banks installed are provided for the comparison. The conclusion of necessity to take the whole current harmonic spectrum into account for the capacitor bank evaluation is drawn.
In modern electrotechnology transformer is the most effective converter of the parameters of electrical energy in power networks. Modern economics and the law require consumers, power grid and power supply companies improve processes and transmission of electricity consumption, and therefore raises the question of the optimal mode of use of the transformer in distribution networks. One way is to use a transformer with a low load factor instead of the outdated not energy-efficient transformer. The calculation, that is demonstrated in the, confirms the effectiveness of the measures under conditions of constant growth in electricity tariffs.
Distributed energy – one of the dominant factors of reducing the effects of depopulation as an example of the republic of Sakha (Yakutia)
The article reviews the demographic situation in Russia, there established the fact of selectively territorial depopulation. According to a census in 2010 in the Siberian Federal District, home there lived 19.254 million, and in the Far Eastern Federal District – 6.292 million. Territorial depopulation leads to negative consequences: a threat to the territorial integrity of the country, under-utilization of the natural potential of the regions. Analyzed the energy needs of the population in regions with extreme climatic conditions and their influence on the process of depopulation, there proposed guidelines to improve the quality of life and even the development of areas through the development of distributed power energy.
Currently, a large number of companies use in their lighting systems inefficient and technologically obsolete luminaries and lamps, which consume a large amount of electrical energy. This is not just the high cost of electricity consumption, but also adverse effects on the quality of staff due to poor quality of lighting. Replacement of incandescent lamps and other inefficient lighting is the basic energy saving measures. However, the low energy efficiency of lighting systems is also due to irrational use of fixtures. In the article the author developed a comprehensive integrated methodology that can provide a qualitative assessment of the effectiveness of energy saving measures for the systems of internal and external lighting.
According to the assumption that government policy on energy efficiency and energy conservation applies to all participants in the production and consumption of energy, an isolated power system and its consumers, in particular, consumers in remote locations, should be considered as a single energy system, which should improve efficiency. Managing such an object must be implemented by a special energy management system (EMS).