Method and system for modeling and speed regulation parameter optimization of a hydropower station with double-machine ultra-long tunnel

Abstract

The invention discloses a modeling and speed regulation parameter optimization method and system for a hydropower station with a double-machine ultra-long tunnel, and belongs to the field of parameter optimization for governors of hydropower stations. Including: modeling of a super-long tunnel hydropower station with two machines; the model parameters {K p1 , K p2 , K i1 , K i2} as a decision variable, the upper and lower limits of the interval initially determined by Stein’s empirical formula are used as constraints, and the unit objective functions with the minimum overshoot and the shortest adjustment time for the first hydraulic unit and the second hydraulic turbine unit and the unit objective functions for the surge chamber The objective function of the surge chamber with the smallest overshoot and the largest attenuation rate is combined to obtain the comprehensive fitness function of the system, and then a multi-objective optimization model is obtained; the genetic algorithm is used to solve it, and the load disturbance mg 1 ,mg 2 Optimal combination of governor parameters for the next two units. The invention constructs a comprehensive fitness function and applies the genetic algorithm to the parameter setting of the speed governor. Due to the consideration of the complex nonlinearity of the water turbine regulation system, the application of the search algorithm to the control parameter setting has the characteristics of strong robustness.

Description

technical field [0001] The invention belongs to the field of parameter optimization of a governor of a hydropower station, and more particularly relates to a modeling and speed regulation parameter optimization method and system for a hydropower station with a double-machine ultra-long tunnel. Background technique [0002] The transition process of a hydropower station with an ultra-long diversion tunnel is complex and special. Due to the constraints of terrain, geology and other conditions or considering the economics of the project, it is necessary to adopt the layout of multiple machines in one tunnel. In a hydropower station with multiple machines in one hole, the turbine governor is an important control device of the turbine regulation system, which ensures the safe and stable operation of the turbine regulation system. In order to make the turbine governor meet certain performance requirements, the parameters of the governor need to be adjusted reasonably. Therefore, ...

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Problems solved by technology

In general, for hydropower stations with super-long diversion tunnels, most of the hydropower station pipelines are arranged in one tunnel with multiple machines, and the layout of the pipelines is mostly asymmetrical, and the adjustment of the output of each unit is also different. Assuming a simplified Theoretical research and the parameter setting of the governor based on the operator's experience judgment are difficult to be well applied in actual engineering

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