Design and implementation of resource-centric web services in smart grid Cyber-Physical Systems

Cyber Physical Systems can be viewed as large networked systems of hybrid nature. In CPS complex services are enabled by a strong influence between computational and physical components that might be globally distributed. A necessary condition for such service delivery is that resources required for complex services are of high quality and are available at service execution times. In a resource-centric service model, both resource quality and service quality using that resource are explicitly stated. In this paper, we apply resource-centric web service in a smart grid Smart Grid Cyber-Physical System (SG-CPS). To this end, we propose the framework of SG-CPS. Design and implementation of a service model for an electricity charging scheduler of the individual electric vehicles in Android platform are introduced. The objectives are to implement the communications and interactions between electric vehicles and SG-CPS management engine. Thus the model allows the driver and passengers of an electric vehicle to send charging request to the management layer from their Android smart phone. In response, the SG-CPS management layer will give a feedback message to indicate the charging schedule for electric vehicle. Through this approach both the electricity power transmission system (TS), and the electricity distribution system (DS) are optimized because the SG-CPS management engine provides a more efficient and more economical option to the service requester.