Design Of Power User Electric Energy Data Acquire System Based On ZigBee

The electric information acquisition system is set up to monitor the electricity information including voltage,current,load and electricity quantity of power consumer,which is an important component of the smart grid. The construction of strong smart grid is the goal of modern power grid. The existing communication mode are power line carrier or RS485,which is inconvenient to maintain. Wireless sensor network applicated in the smart grid has became the research hotspot,for it can be deployed rapidly and wirelessly in large-scale with low power consumption. Based on this,we utilize ZigBee technology to rebuild communication unit of the electricity information acquirsition system in a power supply company,taking the SGCC as standards. In this dissertation,the author analyzed the communication demand and studied the CC2530 and RT5350.On this basis,a zigbee mesh network is established in the test area which also has been tested.The basic function of the system is realized and the performance indications meet the requirement.The main work of this dissertation:1.We analyzed the characteristics of the distribution network in the test area. The structural model adapted to equipment distribution characteristics is established based on graph theory.The dijkstra algorithm is improved by taking communication radius in consideration. And the simulation is conducted in the NS2 through which the improved algorithm is verified. Besides,the zigbee nodes in the test area is deployed rationally according to the algorithm above.2.We analyzed the frame and function in the Zstack. The serial port communication and the zigbee network are established using Zstack.The network address is distributed to the nodes according to the characteristic of the system and the data routing is realized by combining the cluster-tree routing with neighbor table.3. The design of hardware and software are conducted on demands.The hardware connection scheme between energy meter and acquisition terminal node CC2530 module is proposed. The OpenWrt system is migrated on RT5350 development board through which the zigbee network and ethernet is bridged and connected.Besides, the VLAN is established on the existing switch.Finally, the software is programmed and overall test is conducted.The basic function is realized.Based on the above-mentioned research, the test project is conducted at XiangFen power supply company with permission.The zigbee nodes and hardware equipments are installed in the test area and the zigbee based electricity information acquirsition system is established.All functions can be realized.Also the system has been tested and the test result matches the standards of SGCC.