Optimization of the Composition of the Solar-Diesel Unit in the Autonomous Power Supply

The aim of this work is the development of methods for optimizing the structure of the autonomous energy complex, which consists of photovoltaic conversion, diesel generators and battery packs and its implementation in a software package. Optimisation of the complex structure has been implemented through the particle swarm method, objective function of which is the final cost of energy produced. When optimising, load schedule of end users was taken into account, as well as actinometric and meteorological conditions of the area, technical characteristics of the photovoltaic panels and battery packs. There are also three PV panels install options relative to the horizon: horizontally; at an angle to the horizon; at an angle to the horizon with single axis base with a vertical axis of rotation, using the sun tracking system (tilt angle needs to be equal to the latitude). For isolated consumers of Tuva Republic, which function from diesel power plant, the total estimated power of electric generating elements of autonomous energy complex, optimised with the particle swarm method, is 3 578 kW with the capacity of battery packs equal to 1 751 kW
$h$
. The developed method of energy complex optimisationis implemented in the software environment MATLAB. After optimisation by the proposed method of structure of the autonomous energy complex with inclined arrangement of PV panels, estimated net cost of produced energy is 16 rubles/kW
$h$
with capital expenditure being 374 million rubles. The use of this optimised complex structure can lead to decrease of diesel fuel consumption to 60 %.