Hydropower station flood discharge gate modeling and calculating method based on multiple regression algorithm

Abstract

The invention discloses a hydropower station flood discharge gate modeling and calculating method based on a multiple regression algorithm. A flood discharge gate model with three variables includingthe dam front water level, the gate opening degree and the discharge flow is established according to the water level, opening degree and flow relation table of a flood discharge gate; one of the twovariables including the gate opening degree and the discharge flow is calculated according to the other and the dam front water level through the flood discharge gate model for different requirementsof different links of automatic water supplementation. The high-precision calculation of the dam front water level, the gate opening degree and the discharge flow is realized, the high-precision calculation of the dam front water level, the discharge flow and the gate opening degree is also realized, and the model effectiveness and tendency correctness are remarkably improved when the number, correctness and precision of test data are improved.

Description

technical field [0001] The invention belongs to the technical field of automatic control of hydropower stations, and relates to a modeling and calculation method of a flood discharge gate of a hydropower station based on a multiple regression algorithm. Background technique [0002] Due to geographical location and considerations of ensuring shipping and the safety of people near the river, some hydropower stations need to ensure the stability of the discharge flow and downstream water level while undertaking the task of generating electricity. However, hydropower generating units undertake the main peak-shaving task of the power grid, and often need to make large-scale load adjustments in a short period of time. At the same time, hydroelectric generating units may also cause emergency shutdown and load shedding due to accidents. Variety. Therefore, when the power generation flow changes drastically, especially when it drops sharply, it is necessary to open the flood gate u...

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Problems solved by technology

[0003] Document 1 "Principle and Technical Realization of Emergency Water Supplement Program for Monitoring System of Xiangjiaba Hydropower Station" (Automation of Hydropower Plant, Vol. 35, Issue 4, Page 6, 2014), Document 2 "Research and Implementation of Automatic Emergency Water Supplement Downstream of Xiangjiaba Hydropower Station" (Mechanical and Electrical Technology of Hydropower Station, Volume 37, Issue 3, Page 40, 2014), Document 3 "Research and Application of Load Shedding Emergency Water Supply Control of Xiangjiaba Hydropower Station" (Mechanical and Electrical Technology of Hydropower Station, Volume 40, Issue 7, Page 38, 2017) Disclosure A flood gate operation scheme for emergency water replenishment was proposed, but no operational conversion method for gate opening and gate flow was provided in the calculation of gate flow and gate opening, and it was difficult to ensure the accuracy of emergency water replenishment

[0004] Document 4 "Automation Research and Application of Jinghong Power Plant Accident Emergency Water Supply in Monitoring System" (Hydropower and Pumped Storage, Vol. 2, Issue 4, Page 61, 2016) discloses a complete emergency water supply gate operation scheme The linear fitting algorithm is used in the modeling, gate flow, and gate opening calculations. The disadvantage is that the correspondence table between the gate opening and flow at different water levels in front of the dam needs to be completely input into the water replenishment program, resulting in a lengthy program. And it is difficult to control calculation errors due to data entry errors

The above four documents either did not give specific conversion methods for gate opening and gate flow at different water levels, or adopted relatively primitive modeling and calculation methods

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