SIMULATION OF WPP/HPP POWER SYSTEM OPERATING MODES IN DECENTRALIZED POWER SUPPLY SYSTEM

Abstract

Decentralized energy supply areas cover territories disconnected from power grid, and they incorporate only one type of power source. Autonomous diesel power plants (DPP) are used mainly to power decentralized consumers and consumer groups nowadays. DPP basic disadvantages are power production high cost, diesel fuel nonregenerability, greenhouse gas emission and environmental pollution. The possibility of power supply by autonomous power systems combining wind power plants (WPP) and hydro power plants (HPP) as alternative to diesel generation due to hydraulic energy storage advantages has been considered. Autonomous WPP/HPP power system is a combination of WPP, HPP with water-storage reservoir, automatic control system and switchgear, combined by power, infrastructural and data connections. HPP water-storage reservoir parametrization procedure considering operating specificity of HPP and WPP as a part of power system with hydraulic energy storage has been suggested. Mathematical models for operating modes of WPP, HPP and storage reservoir has been developed, which consider resource, technical and technological features of their performance in decentralized power supply system. Technique for determining storage reservoir backup volume with allowance for wind conditions objective parameters, WPP features and storage reservoir configuration has been suggested. Method of day-ahead WPP firm power calculation in solving problem of operational planning of power system operating modes has been suggested. Simulation of WPP/HPP power system operating modes with seasonalstorage reservoir has been carried out on the basis of suggested approach. The techniques could be used for solving design problems to substantiate decentralized power supply system parameters in remote and isolated areas, as well as for evaluating energy-economic efficiency of replacement existent decentralized power supply systems on the basis of DPP using imported diesel fuel by environmentally safe systems on the basis of local energy resource – wind energy and hydraulic energy.