Study On Operation Control And Optimal Operation Of Jiangdu Coastal Runoff Irrigation District

With the rapid development of our country’s economy and the growing shortage of agricultural water resources, in order to ensure the continued, stable and efficient development of agricultural production, comprehensive utilization and optimal management of the irrigation water resources, it is particularly necessary. This subject based on the project of Jiangdu transport along the canal gravity irrigation area in Yangzhou city, it was designed and developed of automatic monitoring and control system in irrigation area.The irrigation area monitoring and control system adopts the advanced industrial control computer, programmable logic controller (PLC), network communication and industrial automation configuration software technology to achieve automatic monitoring the irrigation area gate station running states and the working parameters, gates site and remote control. And it was used to optimize the scheduling strategy, optimize the allocation and management of water resources in this irrigation area.In this thesis, the present situation and development trend of modernization construction in the irrigation area are introduced firstly in both overseas and domestic, then based on the analysis of the needs of automatic monitoring and control project for Jiangdu transport along the canal gravity irrigation area, according to the corresponding design specification, combined with the idea of distributed control system, the system integration is designed. The system adopts a distributed structure, and it was divided into three levels, respectively, the measurement and control of gate station, data processing and remote supervisory control.Local measure and control unit as a fundamental component of the measurement and control of gate station, and it was designed by using programmable logic controller (PLC) as the core, to achieve on-site gate control and the field gate position, water level, power consumption and other related data acquisition. It was used standard, open technology and anti-interference ability, high-fiber economy Ethernet in system network design, and considering the actual situation of the project star topology for networks, constitute the distributed network of gate local measurement and control station.As engineering station monitoring center in the management place, data processing choose high performance server. In Upper computer interface by Kingview software, engineers can achieve the remote monitoring and management of database. In addition, there are monitor workstations and video workstations in monitoring center, both complement each other. The monitoring station installed the client of automatic monitoring and control system in irrigation area, managers can monitor the water level and gate position through returned information, and can switch to the remote control of the state, to achieve the remote control of the gate. At the same time, the monitoring system can achieve the real-time curve display, real-time management, history report query and other functions.To do a good job of scientific scheduling irrigation water, reduce water loss is an important technology of water-saving agriculture. Traditional water distribution model is based on the assumption that lower out let is under the condition of the same flow rate, a target for optimal operation of water resources allocation is implemented by changing drawing water time. But this is not consistent with the actual needs of water resources allocation in most of the channels. To solve this problem, this thesis embarks from the irrigation area actual situation, and overcome the limitations of "constant flow, varied time" from the irrigation area actual situation, an unequal flow strategy in channel water allocation is designed based on genetic algorithm to minimize the waste water and to achieve the optimal allocation of water resources of irrigation area in the water process by making the water flow tend to be stable.