As part of the operational efficiency improvement in IDGC of Centre for the period of 2011 — 2020 continues to the installation of 0.4 kV voltage boosters are under way in Yarenergo. To date, the division has installed 10 boosters according to the program. The plan of the power engineers is to install other six devices by the end of this year.
Voltage boosters are modern, innovative equipment, which stabilizes and increases the voltage in the grid. Often overhead power lines of 0.4 kV voltage have a considerable length, which causes a voltage drop at the end of the line. A large number of single and three-phase consumers makes the even distribution of load per phase difficult, resulting in phase-to-phase voltage tilt. Boosters stabilize the voltage and raise it to the nominal value in accordance with the requirements of GOST.
With a constant increase in the number and capacity of power installations the voltage in the grid drops. This is due to the fact that most power lines were constructed
In the service area of responsibility of IDGC of Centre — Yarenergo division the boosters are installed on 0.4 kV lines. In 2010, an Automatic Voltage Regulator (AVR) was installed on the 10 kV overhead line # 2 from the 220/110/10 kV “Yaroslavlskaya” Substation, consisting of three single-phase transformers. In this case, the use of three transformers is caused by the need to raise the voltage level at the end of the line by more than 10 percent. AVR performs automatic adjustment of output voltage, which increases the quality of electricity and prolongs the life cycle of electrical equipment.
The implementation of voltage boosters in the Yaroslavl region began in 2007. During this period 28 boosters have been installed in Yarenergo. This was due to increase in loads of residential customers, the increased use of electrical appliances and their individual capacity increase. At the moment, in the boosters are installed in Yaroslavlsky, Nekrasovsky, City, Poshekhonsky, Lyubimsky, Pereslavlsky and Uglichsky Districts of Electrical Networks.