基于节点负载均衡的分布式光伏发电无线安全监控网络研究

Research on wireless security monitoring network of distributed PV power generation based on nodes load balancing

为解决分布式光伏发电并网容易对电网产生扰动的问题,引入针对分布式光伏发电无线监控网络,延长网络生命周期,对传统的LEACH协议进行改进,提出LEACH-NEW协议。LEACH-NEW协议将整个无线监控网络划分为等面积的若干个环形区域,依据传感器节点剩余能量在各个子区域内以不同概率选取簇头,使距离基站越近的簇包含更多的簇头,避免热区簇头因转发任务而过早失效。同时采用多跳路径完成数据传输,避免基站远处的簇头因一跳通信而过早失效。NS2的仿真结果表明:LEACH-NEW协议有效地均衡了网络能耗,延长了网络生命周期,使无线监控网络可提供更为可靠的监控,运行更加稳定,网络能耗也更加均衡,且当基站距离监测区域越远,LEACH-NEW协议的优越性越显著。

In this paper, depending on the distributed photovoltaic generation wireless monitoring network, to bal- ance the network energy consumption and prolong the life cycle, the traditional LEACH protocol is improved and LEACH-NEW protocol is proposed. Based on LEACH-NEW protocol, the whole wireless monitoring network is di- vided into several homalographic annular regions. Then, according to the residual energy of sensor node in each ar- ea with different probability cluster head is selected in order to contain more cluster heads at the cluster around base station, avoid cluster head in hot area tending to die early for heavy relay traffic. In addition, the data transmission is completed through multi-jump channel in the LEACH-NEW protocol to avoid the premature failure of cluster heads away from base station. The NS2 simulation results show that the LEACH-NEW protocol balances the energy consumption and prolongs the life cycle of WSNs effectively. Therefore the wireless monitoring network can provide more reliable monitoring in a steady operation. Besides, the advantages of the LEACH-NEW protocol are more sig- nificant when the distance between monitoring area and base station is farther.