The Design and Implementation of an On-demand DC Grid in Home

The design and implementation of an on-demand DC grid in home is proposed. This paper is one of the research of informatization of energy that purposing to realize a highly efficient power distribution systems which does not impair quality of human life. Based on the idea of the informatization of energy, we propose the energy routing switches and peripherals that realize coloring of energy by circuit switching in this paper, and by using this, an on-demand energy network is designed and implemented based on PoE as the physical and data-link layer protocol. The prototype has compatibility with PoE type A, which uses two pairs of a UTP cable, and uses the rest two pairs for our own extension. In an on-demand energy network which we propose, power is not supplied until a powered device sends an explicit request presenting the required quantity and quality of electric power and the request is accepted by the energy network. By this we can suppress the power consumption within the specified target even when the demands from devices are too much. The network itself chooses best matching of a source and a device, and makes reservation of a path. This system allows the network to be on-demand multi sources energy routing and snatching other devices' energy by considering precedence on the proposed architecture with implemented routing switches. In addition to that DC transmission in home can help more highly efficient use of energy. Numbers of home electronics appliances consume DC energy at the final stage. Solar panels, self-generated electricity and most of other dispersed power sources also generate DC. However, power provide from an electric power company are AC, which makes it necessary for electronic devices to convert from AC to DC. Use of AC to DC converter is not only low efficient but also use much of materials when manufacturing. By transmitting the electricity in DC, it can lessen these losses which occur from the conversion.