The Design And Realization Of Power Transmission Monitoring System

As the rapid development of technology and the improvement of productivity, enterprise and human need higher quality of power. The transmission of power is an important way to achieve the balance of power allocation, power transmission network is the main medium of power transmission, on the power line there are always some faults which result in critical economic losses to the enterprise and human. The power transmission monitoring system could detect the faults in the transmission line and protect the safety of transmission network, and play an important role in the safe transmission of power resource.Power transmission monitoring system has three kind of function: signal collecting, information transmission and the information processing. The characters of power transmission line, together with the special environment which the monitoring network works in bring new challenge to the system. As the progress of wireless communication, lots of wireless communication protocols are appearing. Compared with other protocols, ZigBee has advantages in low-power, low-cost and high reliability. It could improve performance of the monitoring system. So we choose the ZigBee based method of power transmission monitoring system.Firstly, the paper introduces the structure, composition and topology of network of ZigBee briefly, then analyses the characters of the signal in the transmission line and the feature of the trouble signal, establish the method which converts the signal by power transformer, electricity transducer and the AD module. After processed, the signals are transmitted by the cluster-based linear network. Meanwhile, we build a new super-frame structure which is appropriate to the monitoring system, and describe the working mechanism of nodes in detail. The main work of hardware design is the node design, includes the wireless sensor node based on CC2430 and the cluster-head node. Also includes the power module, the serial module and the JTAG module. The exploitation of network software platform is based on Z-Stack programming, achieving the process of creating network and joining appointed network. At last, we design the upper operating software to realize the basic operation of database as store, edit and delete.In the end, this paper tests the hardware design and the software programming of the whole system, also analyses the simulation result of the cluster-based network's performance. The testing result proves that our method has good accuracy. It could acquire the trouble signal, so it can be used to monitor the power transmission. The simulation result demonstrates that, compared to normal linear network, communication mechanism in the cluster-base network with new super-frame structure has been well developed in data reliability, effectiveness and low-power consumption...