Abstract
The article discusses the features of the development of long-term energy balances in the interconnected power system of Siberia (IPS). The main feature of the IPS of Siberia is a high proportion of hydro power plants and, as a result, a strong dependence of electricity generation on natural fluctuations in water inflow into reservoirs. In the power output of the HPPs of the Angara-Yenisei cascade, depending on the water availability conditions, the deviation from the long-term average values can be up to 30% or 31 ÷ 36 billion kWh per year. The development of long-term energy balances and an increase in the efficiency of the operation modes of the HPPs of the Angara-Yenisei cascade makes it possible to identify in advance possible risks in the operation of the water management system of the Angara-Yenisei basin and the unified energy system of Siberia, thereby ensuring a more balanced operation of the power system as a whole.
Highlights
In the structure of generating capacities of the interconnected power system of Siberia (IPS), about 50% are hydro power plants, including 30% Angarsk HPP cascade and 20% - Yenisei
The main feature of the power system with a high share of hydro power plants is the large dependence of electricity generation on a natural factor - natural fluctuations in water inflows into reservoirs
In the current system of planning and management of the electric power industry, the electric power balances of the IPS of Siberia are developed in order to test the technical feasibility of providing the required annual electricity generation by power plants taken into account in the power balance, to determine the volume of power flows between power systems and the power plants' need for fuel [6]
Summary
In the structure of generating capacities of the interconnected power system of Siberia (IPS), about 50% are hydro power plants, including 30% Angarsk HPP cascade and 20% - Yenisei. In the absence of forecast indicators of water inflows into reservoirs for a period of more than 3 months, long-term forecasting and planning of energy balances, as a rule, use statistical data for the past period in the form of average long-term and monthly average indicators. In this case, indicators are usually used that correspond to normal ones. It is required to model hydro power plants modes based on inflow scenarios for given energy and water management constraints for reservoir modes, taking into account the requirements of other water users, repair of equipment and electrical networks, dispatch schedules with the formation of aggregated estimates for individual hydro power plants and the cascade of hydro power plants as a whole, energy companies, regional power systems
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