A Method of Adaptive Variable Parameters for Power Mode of Hydropower Units

Abstract

The invention discloses a hydroelectric generating set power mode adaptive variable parameter method. The method comprises the steps that (1) real-time sampling of the a power station operation upstream reservoir water level and a downstream tail water level, and dividing water head sections according to a difference value between the power station operation upstream reservoir water level and thedownstream tail water level are carried out; (2) each of the water head sections is enabled to correspond to a set of PID parameters, real-time updating is not needed, and when a next water head is entered in the process of load regulation, the PID parameters remain unchanged; (3) according to the situation of dividing the water head sections, a plurality of field tests are carried out to select the PID parameters, and a set of parameters with stable regulation is selected as the PID parameters; (4) and according to dividing of the water head sections, an intermediate value + / - 0.5m of the water head sections are treated as a test water head, and final selected parameters are treated as the PID parameters of the water head sections. According to the hydroelectric generating set power modeadaptive variable parameter method, the problems that under a power mode, a same set of regulation parameters cannot be adapted to the change of operating water heads; when a hydroelectric generatingset operates in non-test water heads, the adaption of the parameters is poor; and the response time, the rate of regulation, and the stability of the regulation cannot meet the requirements are solved.

Description

technical field [0001] The invention relates to the technical field of hydroelectric power generation, in particular to a power mode adaptive variable parameter method of a hydroelectric unit. Background technique [0002] Most of the hydroelectric units in my country operate in the opening mode. In recent years, some units have started to operate in the power mode. During the operation, it was found that due to the nonlinearity of the hydroelectric unit, the adaptability of the power mode to the parameters still needs to be optimized, especially for the operating water head. Units with large changes. [0003] When the hydroelectric unit is running in power mode, it has been found through field tests that the adjustment performance of the same set of PID parameters is very different under different water heads. The selection of PID parameters and the control strategy need to consider the adaptability of various working conditions . For example, the parameters that operate w...

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is to propose a method for adapting the parameters of the power mode of the hydroelectric unit to solve the problem that the unit with a large operating water head range has poor parameter adaptability and cannot meet the requirements in the power mode.

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