Distributed Monitoring Architecture And Intelligent Service Method Of Photovolatic Micro Grid Based On DPWS

Currently at the goal of sustainable development of economy, society and environment, the green and distributed energy like solar and wind is getting more and more attention. Micro grid is an efficient application platform for the distributed energy; it makes up for the shortcomings of the grid systems. And there have been more and more studies and application of it because its reliability, flexibility and environmental protection properties.The micro gird in the future should be an integrated network system with intelligence and security. But there are still some problems in the present system of micro grid, such as the lack of support for dynamic characteristics, the special communication protocol and the poor safety. Device profile of web service(DPWS) is the new generation of plug and play middleware which can improve the adaptability and flexibility of the micro grid system, realizing the goal of dynamic discovery of device and the monitoring of various parameters and status. So this paper proposes a distributed monitoring architecture based on the DPWS middleware and analysis its application in micro grid in detail, improving its intelligence. The main work and achievements are as follows:(1) In order to improve the intelligence of device this paper proposes the application of DPWS in micro grid in the understanding that the current micro grid system has shortcomings of lack of dynamic adaptability and proprietary protocols. Describe a three layer network monitoring system and network topology structure based on DPWS.(2) Build the development environment, design and implement two key modules of DPWS: device end and client end. The function is implemented of equipment information boarding and hosting the hosted services through the device service on device end. And the device function is made Web service through hosted service. The service call can be invoked through the service stub implementation. It is realized of the handling prototype of the service and event response through the response message process framework.(3) It is designed and implemented of the device discovery and event function. It is realized of the device discovery and events publish/subscribe function through the two protocol’s implementation. This improves the system’s dynamic response to the change of device and the loose coupling characteristics of data transmission between equipments.(4) It was built of the grid connected micro grid simulation model system. Established a date interface module based on the client / server model, it makes the simulation model and the data service of device connected together. Finally through the experiment of real time monitoring to the key data in the system, the results showed that the adaptive and the loose coupling of the system can be very good to meet the micro grid system’s self-adaptive and real-time requirements, realizing the "plug and play" features.