Hybrid solar power plant «Chateau-15»

Backup solar photovoltaic plant «Chateau-15» was built in the second half of 2014 in Kirovograd region. The total capacity of PV modules installed on the roof of the house is 5 kW and 10 kW still mounted on two mobile tracker biaxial structures. This facility is designed to produce clean electricity, followed by its use for their own use of a private household. The power plant is designed with the use of hybrid inverters Xantrex, and multicrystalline silicon modules LDK with a peak power of 250 watts.

Area, occupied by the photo-voltaic station (PVS), takes 120 sq.meters. According to project calculations, annual generation amount of the solar power-station must be no less than 20 MWh. To provide complete operational autonomy of the solar power-station, block of storage batteries is installed for power supply of object, when amount of electric power, produced by solar panels, is not enough to cover necessities of consumers. Automatic intellectual monitoring and control system is responsible for optimization of processes of accumulation and further distribution of stocked electric power.

The project design of solar power-station involves polycrystaline silicon solar modules being installed and connected into 15 rows (strings) with 4 solar panels in a row. Solar batteries in rows number 1-10 are mounted on dynamic biaxial trackers, and batteries in rows number 11-15 are installed on stationary metalworks on building roofs. In addition, the project documentation includes operation of hybrid inverters and block of storage accumulators, which includes 24 storage batteries with 200 A*h capacity for each battery.

How does backup solar power station work? The electric power, that is generated by solar batteries, accumulates in block of 24 storage batteries. If electric power is no longer supplied from the centralized network, when direct electric current from accumulator batteries is provided for conversion into alternate current on inverters, whereupon enters home electric system. Inverters work to provide the power supply of consumers both in the mode of complete autonomy (due to the energy, produced by solar batteries) and in mixed (hybrid) mode, when 90% of energy is taken from solar batteries and 10% are consumed from general centralized grid. The hybrid mode of power supply allows  to shorten considerably consumption of electricity from general network, and consequently desrease electricity bills.

The following equipment was installed during construction of Chateau-15 solar power-station:

• LDK solar panels, polycrystalline, 250 W power capacity — 60 total units.
• Off-grid Schneider Xantrex 6048 XW+ hybrid inverters — 3 total units.
• AS SUNFLOWER-20 biaxial surface trackers – 2 units;
• Stationary set for installation of solar batteries on a skate roof:
• Accumulators: AGM Ventura GPL 12-200 (24 units).
• Charge controllers: Schneider XW – MPPT60 – 150 60a 12-48v MPPT (6 units).
• Direct-current electrotechnical panels: 3 units.
• Direct-current summing amplifiers: 6 units.
• Control panel (XW series) provides monitoring and control of the solar power-station, enables observability and fine tuning of every element/device operating   under the control of Xanbus network).

List of services:

• 3D-modelling for determination of possible shading zones of  solar panels of the station. Operational modelling of the station with determination of theoretical generation amounts of electric power was performed, using special PVSYST software environment.
• Project of supporting stationary metal frameworks is developed, including calculations on mechanical loading and foundation parameters.
• Detailed project design of the solar power-station is worked out.
• Necessary equipment is supplied.
• Installation of solar panels, DC cables mounting, inverters installation and complete commutation of all elements.
• Starting-up, adjustment and commissioning works, and also transfer of the station into operation and maintenance phase.
• Warranty and service maintenance of the equipment, mounted on the solar power-station.