| To put forward the construction of electric energy data acquire system first time,the conference was held by State Grid Corporation of China in 2007.In the early stage of the system construction,it could meet the requirements of application because of the small coverage,the little network communication node and the limited interactive data.With the deepening of the acquisition system construction,the communication was failure more frequently.It was because of the coverage of carrier communication becoming larger and larger and the communication nodes becoming more and more in an area.Through the research,it is found that this problem can be solved by using carrier relay routing method.From the initial development of fixed routing to individual study routing,there are several ways of relay routing.Dynamic routing is widely used at present.It has very high application value and significance to study the routing algorithm which is suitable for low voltage power line channel with low impedance,high noise,high attenuation and time-varying characteristics,and it has been studied to improve the reliability of the carrier communication.It is begin with the analysis of recent developments of power line carrier communication of home and abroad in this paper.And the physical characteristics and network characteristics of power line carrier communication are studied.In order to adapt to the network structure,relay routing methods should be used to make effective communication between the concentrator and the target node.Dynamic routing can be well adapted to the power line communication network.It is based on ant colony algorithm and genetic algorithm of dynamic routing.Two kinds of algorithms are studied in depth in this paper.Two algorithms can be applied to low-voltage power line carrier communication.But after studying and analyzing the advantages and disadvantages of the two algorithms,it is considered that the two algorithms can be complementary to a certain extent.Then a better relay routing named algorithm-hybrid optimization algorithms are formed and analyzed in theory.In order to confirm its feasibility of the hybrid algorithm,an automatic meter reading system based on carrier relay routing method is researched and developed.The system is divided into two parts.One is virtual test system,in laboratory within through data acquisition system,and copy control device and virtual table software validation mixed routing algorithm of feasibility.The other is a test system which is built to simulate actual operation environment and actual operating condition.Through the test and analysis of the three routing algorithms,the performance advantage of hybrid algorithm is proved.The advantage is that the meter reading efficiency is greatly increased and the relay series decreased significantly,so the application prospect is very broad. |
