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Large-scale irrigation system control method based on distributed model prediction control

A model predictive control and irrigation system technology, applied in the field of agricultural irrigation, can solve problems such as strong coupling relationship between adjacent canals, large communication volume, and high complexity of centralized control

Active Publication Date: 2014-03-26
ZHEJIANG UNIV OF TECH
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Problems solved by technology

[0006] In order to solve the problems of large-scale centralized control in large-scale irrigation systems, such as large complexity, large communication volume, and strong coupling relationship with adjacent channels, the present invention provides a distributed control system that is relatively simple, easy to implement, and has better control effects. control method for controlling the water inflow rate of each canal in a large-scale irrigation system

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  • Large-scale irrigation system control method based on distributed model prediction control
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  • Large-scale irrigation system control method based on distributed model prediction control

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings.

[0036] refer to figure 1 , a large-scale irrigation system control method based on distributed model predictive control, including the following steps:

[0037] 3) 1) First, establish the mathematical model of each channel in the irrigation system:

[0038]

[0039] where x i (t) represents the water level of channel i, Indicates the set of channels upstream adjacent to channel i, Indicates the set of channels downstream adjacent to channel i; u i,j (t) represents the velocity of water flowing from channel j to channel i, and there is v j,i (t)=u i,j (t); v i,h (t) represents the velocity of water flowing from channel i to channel h, and there is v i,h (t)=u h,i (t); d i (t) represents the disturbance on channel i, α i Indicates the area of ​​canal i, and the mathematical model of the canal is discretized, and the sampling time is T, and the following dis...

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Abstract

A large-scale irrigation system control method based on distributed model prediction control comprises the following steps that 1) a mathematical model of each canal in an irrigation system is built, and it is taken into consideration how many water inlets and water outlets may each canal have in practical situations; 2) performance indexes of each canal system are built, performance indexes of each canal are taken into consideration under partial cooperation situations, and therefore the system can be converged rapidly, communication traffic is reduced, and meanwhile overall performance can be improved; 3) the distributed MPC algorithm is provided, the optimal input quantity of each canal is calculated under the current situation by means of partial communication, the system is finally converged to a Nash equilibrium point by conducting iteration continuously on the basis of the Nash game theory, and therefore the optimal input quantity at the moment is reached.

Description

technical field [0001] The invention relates to the field of agricultural irrigation, in particular to a control method for a large-scale intelligent agricultural irrigation system. Background technique [0002] China is a big country with a population of over 1.3 billion. In order to solve the problem of people's food and clothing, the harvest of crops and if the crops fail, no country has the ability to help China solve the problem of people's food and clothing. The stable development of agriculture is of great significance to China. China's main grain-producing areas are in the north, such as the North China Plain, but water resources are scarce in the North China Plain, so an intelligent and efficient agricultural irrigation system is crucial. And in the south and northeast of China, rice is an important food crop, so people put forward higher requirements for the efficient agricultural irrigation system in the south and northeast. At the same time, due to the large-s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G25/16
Inventor 张文安张荣超刘安东凌荣耀俞立
Owner ZHEJIANG UNIV OF TECH
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