Abstract
The paper discusses the trends, features, and current problems of the operation of hydro power plants in the interconnected power system (IPS) of Siberia. The main feature of the IPS of Siberia is a high proportion of hydro power plants and, as a result, a strong dependence of power generation on the natural fluctuations of water inflows into reservoirs. The problems affecting the power system efficiency arise when the inflows deviate from normal and close-to-normal values. The study indicates the need to improve the current system of managing and planning the operation of hydro power plants. The important factor that can increase the efficiency and reliability of the power system operation is bringing the permissible ranges of variations in reservoir levels in compliance with the design values. Planning the long-term power balances and increasing their validity should involve predictive scenarios of water inflows into reservoirs.
Highlights
In 2019, 60 years had passed since the establishment of the interconnected power system (IPS) of Siberia
Hydro power plants generate about 50% of the total electricity produced in the IPS of Siberia, of which 80% is from the Irkutsk power system
In 1959, when the IPS of Siberia was put into operation, the share of hydro power plants (HPPs) in the structure of its capacity was less than 16%
Summary
In 2019, 60 years had passed since the establishment of the interconnected power system (IPS) of Siberia. The Angara HPP cascade (Fig.1) plays an essential role in the operation of the IPS of Siberia. This system includes unique multi-year Irkutsk (Lake Baikal) and Bratsk reservoirs (with a total live capacity of 96 km3), which allows storage of up to 1012% of the entire annual demand for electricity of the IPS. The Angara and Yenisei hydro power cascades fulfill several other system-wide functions They cover the variable part of the load curve, including daily and weekly regulation, regulate frequency, and provide the major part of the load and emergency power reserves [2,3]
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