Study On Location And Energy Management Techniques Of Wireless Sensor Network In Microgrid

The transmission of electric energy mainly relies on the power system.In order to realize the real-time monitoring of power transmission and distribution process and ensure the reliable and efficient transmission of electric energy,the trend of smart grids is inevitable.Due to the instability and poor controllability of distributed generation in the smart grid,the microgrid mechanism is proposed.Microgrid is an important part of the construction of smart grids.Advanced communication system is also the factor to ensure the intellectualization and autonomy of microgrid.In recent years,wireless sensor network is applied to the microgrid monitoring with its low cost,rapid deployment and good scalability.This thesis focuses on the research of two key techniques in microgrid monitoring network: location technique and energy management technique.The thesis discusses how to improve the location accuracy and balance energy consumption of the nodes in wireless sensor networks while meeting the requirements of microgrid communication.The main work of the paper is listed as follows:(1)In order to improve the accuracy of location in wireless sensor network monitoring,an improved DV-Hop algorithm with inversion method is proposed.Firstly,employing dual communication radius to refine the hop count;secondly,utilizing inversion method to correct the estimation coordinates of unknown nodes;and thirdly,resorting to dynamic weight value associated with the hop to do further revision.(2)In order to solve the problem of limited energy in wireless sensor network,an improved algorithm of EB-IDMF is proposed.On the basis of the original maximum flow route algorithm(FF algorithm),the edge capacity is dynamically updated,and the energy balance mechanism is added.Finally,the edge capacity is combined with the edge betweenness to form a better performance EB-IDMF algorithm.The simulation examples are supplied to demonstrate: the better effectiveness of the proposed algorithm for fault location,than the traditional DV-Hop algorithm and other algorithm.The EB-IDMF algorithm proposed in this thesis can obviously balance the energy consumption of the nodes,save energy,prolong the life cycle of the network,and greatly improve the wireless sensor network's throughput,compared with other algorithms.