An Algorithm for Calculating the Operating Parameters of Hydroelectric Power Plants in the Power System Load Curves Using Compensated Electrical Runoff Regulation

Abstract

The article outlines the main principles laid down in the algorithm for determining the key indicators characterizing the performance of hydroelectric power plants (HPPs) in the power system’s future load curves in using the compensated electrical runoff regulation mode. Maximal utilization of the HPP working power capacity with the minimum possible idle discharges of water from the reservoir is the key criterion that will characterize the performance of the compensating hydroelectric power plant having a reservoir used for multi-year flow adjustment in case of using this runoff regulation mode. It should be noted that there are certain limitations imposed on the power output produced by thermal power plants (TPPs) in the annual and multiyear time scales, which were taken into account in developing the algorithm for calculating compensated electrical regulation of runoff. The above-mentioned limitations in the annual time scale mean that the maximal power outputs generated by TPPs correspond to the winter months, during which the load maximum is observed, and their minimal power outputs are observed during the summer months, in which the TPP equipment is taken out for repairs. In the multiyear time scale, the compensating hydroelectric power plant performs multiyear redistribution of runoff for smoothing both the total power output generated by the HPPs and the participation of the hydroelectric power plant in the grid’s power balance. The compensated electric runoff regulation mode makes it possible to smooth variations with time in the maximal levels of power generated by TPPs. This circumstance imposes additional limitations on the compensator’s working power and on its distribution between the load curve peak and base parts in shaping the power balance. As an example, the article presents joint operation of the currently designed Evenki HPP and the HPPs of the Volga--Kama HPP cascade within the daily and annual load curves of the Center and Middle Volga power pools over a significant interval of time equal to the life cycle of an investment project in the electric power industry.eving better thermal efficiency of power plants in Mongolia through constructing new power units based on the IGCC technology is proposed.