Cascade reservoir optimal operation method based on cascade reservoir operation coefficients

Abstract

The invention relates to the technical field of cascade reservoir operation, in particular to a cascade reservoir optimal operation method based on cascade reservoir operation coefficients, which is characterized by comprising the following steps of: 1, calculating the cascade reservoir operation coefficients; 2, establishing a cascade reservoir operation coefficient optimization model; and 3, carrying out comprehensive solution. The method has the beneficial effects that two indexes of the reservoir peak distribution coefficient and the base load coefficient are provided, and how to distribute the residual electric quantity of the system among the cascade hydropower stations in the research period and how to distribute the total power generation capacity of the hydropower stations in timesequence are determined. The minimum of the maximum output power shortage rate in a month is taken as an optimization target; conditions such as cascade reservoir output constraint, reservoir capacity constraint, flow constraint and hydraulic relation constraint are considered, an optimization model of cascade reservoir operation coefficients is established, a cascade hydropower space-time optimization distribution result is obtained through solving, and the method has important guiding significance for long-term planning and construction of a new energy base.

Description

technical field [0001] The invention relates to the technical field of cascade reservoir operation, in particular to a cascade reservoir optimization operation method based on the cascade reservoir operation coefficient. Background technique [0002] With the increasingly severe environmental problems, the large-scale utilization of renewable energy such as wind power, photovoltaic and hydropower has become a research hotspot. Studies have shown that natural resources such as wind, light, and water have good spatio-temporal complementary characteristics, and the wind-solar-hydro hybrid power generation system can improve the stability of the active power output of the system, and at the same time increase the level of renewable energy consumption. Southwest my country is rich in natural resources such as wind energy, solar energy, and water energy, and has the natural advantage of building a multi-energy complementary power generation system. [0003] Compared with traditio...

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Problems solved by technology

[0005] However, cascade hydropower output is largely limited by natural runoff, and other constraints such as shipping and irrigation must also be considered

Unreasonable cascade reservoir scheduling and operation strategies may lead to severe water abandonment during wet seasons, and prominent problems such as inability to provide stable power delivery during dry seasons

The general short-term coordination optimization method is difficult to apply to the constraints under different seasonal conditions. The analysis of the wind-hydro hybrid power generation system in the basin needs to fully consider the different tasks undertaken by the hydropower units and the seasonal differences in boundary conditions such as water inflow and storage capacity.

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