Multi-working-condition optimization design method for turbine runner under multi-energy complementation condition

Abstract

The invention provides a multi-working-condition optimization design method of a water turbine runner under a multi-energy complementary condition, which comprises the following steps of: firstly, establishing an initial blade three-dimensional model, enabling a Bezier curve to express the geometric distribution characteristics of a setting angle of the model, modeling an obtained optimization design variable, and constraining the change range of the inlet and inlet setting angles of the obtained model; then, a sample space of optimization design is constructed according to the optimization design variables and the constraint variables, hydraulic performance numerical calculation is conducted on each mixed-flow water turbine runner model, the operation efficiency of the mixed-flow water turbine runner model under the ultra-low load working condition, the low load working condition and the rated load area is obtained, and an optimization objective function is established; and then constructing a response surface model between the constraint variable and the optimization objective function, enabling the response surface model to meet the precision requirement, performing global optimization on the response surface model to obtain an optimal solution set, and selecting a solution set with improved weighted average efficiency of the water turbine and the runner blade thereof from the optimal solution set, namely the water turbine runner after multi-working condition optimization under the multi-energy complementary condition.

Description

technical field [0001] The invention belongs to the field of optimization of hydraulic machinery rotating parts, in particular to a multi-working-condition optimization design method of a hydraulic turbine runner under the condition of multi-energy complementation. technical background [0002] At present, new energy power generation is developing rapidly, and new energy is changing towards a green and low-carbon direction. Wind power and photovoltaics, as renewable clean energy sources, are abundant and easy to obtain. As a new mode of energy transformation and utilization, wind-solar-water multi-energy complementary power generation is also one of the important directions of future energy development. In the wind-solar-water multi-energy complementary system, the strong randomness and flexibility of wind power and photovoltaic power generation require hydroelectric units as compensation output, resulting in frequent operation of hydroelectric units in partial working condi...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing runners can run stably in the high-load area. When the Francis turbine is under the condition of multi-energy complementarity, the existing runners are difficult to meet the operation requirements of wind, water and multi-energy complementary power generation.

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