Method for intelligently starting water turbine of pump storage unit under working condition

Abstract

The invention discloses a method for intelligently starting a water turbine of a pump storage unit under a working condition. The method comprises the steps of (1) building a pump turbine adjustment system simulation model of the pump storage unit; (2) setting a three-stage startup control principle in the pump turbine adjustment system simulation model; (3) establishing a startup process control parameter optimization target function by adopting an index of an integral of discrete time multiplied by an error absolute value as a target function of control parameter optimization according to the three-stage startup control principle; and (4) solving the startup process control parameter optimization target function by applying a heuristic optimization method, and obtaining optimal control parameters. According to the method, the control parameters are optimized and applied to simulation calculation, so that the working-condition startup quality of the water turbine of the pump storage unit under different water heads is remarkably improved, the startup time is shortened, the overshoot is reduced, and indexes of speed fluctuation and the like are reduced.

Description

technical field [0001] The invention belongs to the technical field of hydroelectric power generation, and more specifically relates to an intelligent start-up method of a pumped-storage unit hydraulic turbine working condition. Background technique [0002] At present, the start-up method of most pumped-storage units in my country under the working condition of the turbine follows the traditional start-up method of hydroelectric units, and generally adopts the "open loop + closed loop" mode, that is, no speed feedback signal is introduced in the initial stage of start-up, the control system is open-loop, and the governor is in accordance with A certain law controls the opening of the guide vane, the speed of the standby unit rises to near the rated speed, and then introduces the speed feedback signal, and the governor adjusts the speed of the unit to the rated speed according to the closed-loop control law (usually PID control), pending grid connection. [0003] According to...

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Problems solved by technology

[0006] In view of the defects of the prior art, the purpose of the present invention is to provide an intelligent start-up method for the working condition of the pumped-storage unit hydraulic turbine, which aims to solve the deviation in the existing start-up method and the large hydraulic pressure oscillation in the pipeline, which affects the operation of the unit. Problems with stable operation

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