Based On The Analysis And Improvement Of Smart Distribution Networks LEACH Routing Algorithms

The smart grid is considered as a future network development direction in China and the world, and obtained a rapid development in recent years. Seem as an important part of the smart grid, the power distribution network is oriented directly to consumers, which is the key link to ensure the quality of power supply, improve the efficiency of power grid, and provide innovation service. The distribution network construction is lagging behind due to administration system in China. While national "Twelfth Five Year Plan" takes construction of smart grid as a major project, a huge investment is being carried on to support the development of smart grid. The intelligent power transmission and distribution network is free-riding alongside the smart grid. However, a strong support from communication system is needed by power distribution network. The power distribution is mostly oriented to consumers, which usually concentrated in the populous place such as urban, and the access affecting from new energy power generation on power system is mainly reflected in the distribution side. Because our municipal engineering construction level is relatively backward, so far in most areas the various municipal pipelines are often buried underground. With the city modernization advancement, underground pipeline network is more and more complex, which makes new network cabling more and more difficult. The advantage of wireless communication technology in distribution network construction is increasingly obvious. Compared with the traditional wireless network, WSN has the advantages of easy deployment, low cost, high capacity, self organization and other advantages, which has a very broad application prospects in building intelligent distribution network.The network-layer control protocol of WSN makes different nodes to form a multi hop data network, which plays a very important role in proper operating of the network. Compared with the traditional routing protocol of wired networks, the routing protocol of WSN needs to be concerned about not only energy consumption of each node, but also average energy consumption of the whole network. It also needs to consider aspects of transmission ability, calculation capacity, storage capacity for each node. Each node can only obtain limited network topology, so the network protocol could not be too complex in order to reduce the power consumption of nodes, and prolong the network lifetime. Considering the power system equipment is relatively fixed in position, and the power supply is more flexible, and the topology change is small, and the data type is simple. So we can make full use of the advantages of power system in the protocol design to improve the applicability of the routing algorithm.Combining with the application of WSN in smart distribution grid, this paper constructs the energy model as well as the system framework for WSN for6applications in smart distribution grid. A detailed analysis of the classification method and principle for typical routing algorithms is carried on. While a detailed discusses of principle and realization method of LEACH algorithm is also going behind. According to the characteristics of smart distribution grid itself, this paper pointed out the shortcomings of LEACH algorithm, and proposed an improved algorithm SG-LEACH for power communication. According to the characteristics of power communication, the algorithm divides the node into ordinary nodes and senior nodes with convenient power supply and fine location, in which the senior nodes can be elected as cluster head node with high priority. The simulation results show that, SG-LEACH algorithm can effectively balance the node energy consumption distribution, greatly prolong the node survival time, and improve the network transmission efficiency.