Design And Implementation Of Distributed Low Power DC Power Supply System Based On CC2530

In recent years,with the rapid development of wireless communication technology and sensor technology,wireless sensor networks have been more and more widely used.In particular,it has been widely used in environmental monitoring,power Internet of Things and other fields.However,in practical applications,there are a large number of field scenarios(such as landslide monitoring,forest fire monitoring,etc.).Due to the particularity of environmental conditions,it is impossible to rely on the power grid to provide electricity.Energy supply has become a key issue restricting network deployment and system performance.In such field application scenarios,it is of great research significance and practical value to use renewable energy to design a power supply system that meets the needs of multi-terminal power supply.Because of the above problems,considering the working site of the field monitoring scene,the photovoltaic module is selected as the energy input,and an efficient network power supply system is designed.The system collects,monitors and regulates the running status of each power node entering the network.It adapts to the multiple power supply requirements of sensor networks and sensor terminals in the same monitoring area through multi-power coordination.The work done in this paper is as follows :1.Complete the network power supply’s hardware and software system design.The network architecture of the network power supply system is proposed to realize an efficient cooperative energy supply of multiple wireless sensor nodes in the same monitoring area.The power supply system is composed of an energy conversion part and an energy storage part.The energy conversion part includes a photovoltaic module,DC-DC main circuit,control chip,auxiliary power supply and sampling circuit.The energy storage part is composed of high-capacity batteries.First,the photovoltaic module is modeled and simulated to improve energy efficiency,and the importance of maximum power tracking to network power supply is expounded.Then,the working mode of the DC-DC circuit is analyzed.The circuit adopts a PCB layout and low-loss structure,meeting the network power supply circuit’s high energy efficiency design requirements.The test results show that the design power supply meets the power supply demand and the data transmission is normal.2.An improved MPPT control algorithm based on particle swarm optimization is proposed.Firstly,the principle of the classical MPPT algorithm is studied,and three classical photovoltaic MPPT control algorithms are compared and analyzed.Based on the above classical algorithm simulation analysis,the characteristics of outdoor wireless sensor photovoltaic input are reasonably analyzed,and an improved particle swarm optimization algorithm is proposed to control the maximum power tracking scheme.By adding an adaptive factor,AF-PSO is proposed to optimize MPPT.The MPPT position is adjusted according to the previous time quantity and the current quantity so that the control accuracy and speed can reach the maximum power tracking optimal control.Finally,the model is built by Matlab / Simulink simulation platform to verify the algorithm’s feasibility,which provides an algorithm for the overall energy efficiency optimization of the network power system.3.Build a verification platform for physical testing.Firstly,the experimental environment test power supply prototype is built to obtain the basic electrical parameters,and then the system output test is carried out by selecting a day time period to complete the system power supply voltage output and maximum power tracking experiment.The results show that the network power supply system meets the needs of efficient power supply.Finally,the functions of ad hoc network,remote monitoring and collaborative management of network power supply system are tested.The overall experimental test shows that the network power supply system based on Zig Bee protocol has certain practical value.