Research And Design Of Routing Algorithm In Smart Distribution Grid Based On WSN

Strong smart grid can greatly improve the stability,security and reliability of power system operation,and at the same time,it can greatly improve the efficiency of energy usage and reduce pollution to the environment.More and more countries take the development of smart grid as a national development strategy.China has formulated the developing strategy of "strong smart grid".However,the construction of the smart distribution grid is relatively backward,and the relative research has become the bottleneck of the development of the entire smart grid.The studying problem of smart distribution grid is building the communication network accord with the structure of the distribution grid in China and the researching of the routing protocol which can satisfy the reliability and timeliness of data transmission proposed by the communication standard of smart distribution grid.In this paper,based on the study of the structure characteristics of distribution system and communication service specifications,built a smart distribution communication network based on wireless sensor network.And on this basis studying and designing a Geographic-based Quick Opportunistic Routing protocol which can improve the transmission reliability and timeliness of the data communication service in the smart distribution grid,which provide the information layer guarantee for the efficient and safe operation of the smart distribution grid.The main work of this paper is as follows:(1)The paper has analysis comprehensively of the advanced distribution automation system,aiming at the characteristics of distribution terminal equipment,and the requirement of smart distribution grid communication service,studied the networking model of smart distribution grid communication network based on WSN.(2)Proposed a Geographic-based Quick Opportunistic Routing protocol..Considering the requirements by the communication specification of smart distribution grid for reliability and timeliness of the data transmission is particularly harsh.The location of distribution equipment in smart distribution grid system is basically unchanged,the communication service of each equipment is periodic except for sudden communication.This paper will adopt opportunistic routing with high reliability,attaching the location information of the nodes and the node congestion detection method,using Exponential Weighted Moving Average prediction algorithm to forecast the forwarding delay of neighbor nodes.The node according to the location of the destination node to calculate the forwarding speed of neighbor nodes,according to the forwarding speed,reliability and congestion state choose appropriate nodes composing the forwarding candidate set.According to the forwarding delay the forwarding priority is established between the nodes,it can reduce the waiting time before forwarding,and avoid the retransmission of data.This strategy of this mechanism make the reliability and timeliness of data transmission can exceed the predetermined requirement value.(3)In this paper,the GeQOR routing is compared with the existing more excellent routing in real-time and reliability.Through theoretical analysis and compare,GeQOR advantage SPEED,DMPDSR routing in timeliness and reliability.Compared and analyzed the influence of elements in the routing decisions on GeQOR routing for real-time and reliable performance.Through the simulation experiments,compared the advantages of GeQOR routing over GeRaF routing in timeliness and reliability.This paper,through the study of smart distribution grid based on WSN and proposed the GeQOR routing protocol,which make the data flow in the smart distribution grid can be transmitted in real time,reliable and accurate,has a certain practical significance in promoting the development of Chinese smart grid.