An Automatic Control Method for Irrigated Multi-level Canals Based on Model Predictive Control Algorithm

Abstract

The invention provides a multi-level irrigation channel automatic control method based on a model prediction control algorithm, which belongs to the field of irrigation water transmission and distribution automatic control and agricultural water resource management. The design data and operation condition data of the multi-level irrigation channel are firstly acquired, and a channel control modelis established and converted to a state space equation form; the future output of the irrigation channel water transmission and distribution system is then predicted, and according to the operation conditions, a model prediction control algorithm object function and recognition constraints are established; and finally, the optimal control quantity is obtained by optimization solution, and safe andeffective automatic control on the multi-level irrigation channel is realized. the model prediction control algorithm is designed based on the design data and the operation conditions of the multi-level irrigation channel, known water intake changes and constraints in operation of the multi-level irrigation channel can be effectively handled, the method can be used for automatic control design onthe multi-level irrigation channel, safe and reliable water supply service can be ensured, and efficient management and utilization of water resources in irrigation areas can be effectively realized.

Description

technical field [0001] The invention belongs to the fields of automatic control of irrigation water transmission and distribution and management of agricultural water resources, and in particular relates to an automatic control method for irrigation multi-stage channels based on a model predictive control algorithm. Background technique [0002] In the current water resource utilization structure, agricultural water accounts for the largest proportion, and agricultural water use accounts for about 70% of the total water use worldwide. A large amount of waste of resources also leads to the inability to provide efficient and reliable water supply services for water users, resulting in inefficient allocation and low utilization of water resources. About 20% to 30% of the water loss is due to water loss in irrigation channels. It is caused by unreasonable scheduling operation. The automatic control of water transmission and distribution of irrigation canals, through real-time m...

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Problems solved by technology

However, the design and solution of the model predictive control algorithm under the current constraints are not sufficient, which limits the effective application of MPC in practical engineering.

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