Method for operating cross-basin cascade hydropower station groups under condition of dynamic commissioning of giant hydropower stations for long term

Abstract

The invention relates to a method for operating cross-basin cascade hydropower station groups under the condition of dynamic commissioning of giant hydropower stations for a long term. The method includes steps of 1, predicting load; 2, deducting power station output procedures not participating in computation from monthly average load; 3, computing natural inflow procedures at different frequencies of basins in whole networks; 4, computing output procedures of various hydropower stations; 5, computing output procedures of thermal power stations. The method has the advantages that actual operation characteristics of Yunnan power grids are combined with one another, the hydropower stations are divided into two categories including a category participating in computation and a category not participating in computation, the power stations participating in computation mainly include the hydropower stations and the thermal power stations which are good in regulation performance and have large installation scales, the power stations not participating in computation mainly include hydropower stations and partial thermal power stations which are low in wind-power, photovoltaic and weekly regulation performance and only change slightly in long-term operation procedures, and the output procedures of the power stations not participating in computation can be given according to actual operation conditions of the power grids.

Description

technical field [0001] The invention relates to the technical field of hydropower station engineering, in particular to a long-term operation method for a group of cascade hydropower stations across river basins under dynamic commissioning of giant hydropower stations. Background technique [0002] In the next 20 years, with the large-scale and dynamic commissioning of large-scale hydropower stations on the upper reaches of the Jinsha River, the Yalong River, the Dadu River, the Lancang River, the Nu River, and the Yellow River, the concentration of hydropower will be even higher. When the proportion of hydropower increases to more than 70%, natural water in extreme climates will have an increasing impact on the safe operation of power grids and hydropower systems, including large-scale hydropower transmission, large-scale consumption of hydropower during flood seasons, and cross-regional and cross-province during dry seasons The continuous drought in Yunnan in recent years ...

AI Technical Summary

Problems solved by technology

However, there are still deficiencies in this technical solution. It can only be adapted to a fixed number of inter-basin cascade hydropower station groups, and it is not suitable for cascade hydropower station groups that are put into operation dynamically. Moreover, this technical solution only involves hydropower and does not involve other energy sources such as thermal power, so it cannot analyze the entire power. Therefore, when the large-scale cross-basin cascade hydropower station group is in the dynamic commissioning situation, this technical solution cannot allocate hydropower system resources well and give full play to the comprehensive benefits of the cross-basin hydropower station group

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