###### Abstract  
In this paper, a novel microgrid (MG) concept suitable for direct current (DC) multibus architectures is depicted. Multibus feature is improved in order to distribute power in DC using a number of buses at different voltage level. A teachers offices building that houses several kinds of loads, including a charging station for electric vehicles (EV), is considered to validate the strategy. Several topologies of power electronics converters (PECs) are included in the system to perform specific tasks and providing isolation between bus and final loads. In order to develop the PECs, first, a switching function is used to obtain average model of each converter. Then, converters design is done by using well known methods that allow to obtain parameter values of all the devices in every version of each kind of converter. A hierarchical control is selected to govern the direct current microgrid (DCMG). At a lower control level, local control stage is implemented and tuned using models and designs obtained, with linear controllers in some PECs and classic strategies in others. In higher control level, there is a supervisory strategy that prioritizes the use of generated power to supply the building's loads. This energy management system (EMS) is based in Petri net theory; it consists of a start-up test, then source condition synchronous algorithm and load condition synchronous algorithm operate the DCMG according to the mentioned priority. Finally, PECs are tested on standalone, performing in closed loop, facing load changes to verify the adequate operation. Some trajectories of a simplified version of the CDMG are tested with local control in order to validate the multibus multivoltage concept. In order to verify coordinated control, some events managed by EMS are presented. direct current microgrid; multibus; multivoltage; space state model; feedback state controller; hierarchical control, electric vehicle charge station; energy management system; Petri net 40.0  
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supply power to different types of loads; some of them can be called recent in the market, such as electric vehicles (EV). The concept that considers DGs and ESSs operating together to supply power to loads appeared just over a decade ago. In order to make this idea come true, PECs are included to provides control and flexibility to a general structure called MG [1]. For any MG, it is possible to define three general objectives: higher reliability, losses reduction in feeders and improved efficiency in local supply. In order to reach them, three critical components are needed as part of the MG [2]. They are: local control in each PEC, high level control layers or/and EMS and protections array. In this manuscript, we describe the beginning stage of a long-term development; the final goal is the implementation of a MG placed in a teachers offices building for experimental purposes. Specifically in this paper, a novel concept for a MG architecture is presented with in situ linear controllers are proposed and includes a supervisory control level with a EMS based in Petri net theory [3]. Protections arrays are not part of this document. An MG can be classified according to two criteria. First, the voltage at common connection point (CCP), power distribution could be in alternating current (AC) or in DC [4], also hybrid architectures have been presented in literature. The second criteria is about the system operation. If the MG interacts with mains, it is called interconnected mode; else, when MG is not connected to mains, it is said that the MG is operating in island mode [5]. Some systems are able to change its operation mode eventually. When the MG elements are integrated in a DC bus, parameters such as reactive power flow, frequency variations and amplitude disturbances do not take place.