regulations that apply to these types of connections, such as for protection and control systems, must be considered [7,8]. MGs have been extensively investigated in literature. For instance, the authors in [1] researched the implementation of a MG at Xiamen University in China. The authors explored the implementation of a DC MG in commercial buildings. They implemented a MG using solar energy on the rooftop of the engineering building. The main power supply on the rooftop was 150 kW and can supply different DC loads, such as air conditioning, electric car charging stations, and LED lighting. One of the advantages of this MG is that it can be remotely monitored and controlled through computers, and tablets or smartphones. In addition, other advantages are to reduce energy consumption, and offset carbon emissions. Some universities researched MG implementation with other technologies to reduce fuel consumption. The combined heat and power (CHP) is one such technology and it can provide electricity and heat simultaneously. [PERSON] et al. developed a dynamic Simulink model and it was compared with an existing micro-CHP system at the University of Warwick. The results suggest that the experimental test matched the measured data, which compared different scenarios. The authors highlighted that CHP improves efficiency in contrast to traditional plants, with lower fuel consumption and environmental effects. These conclusions make the CHP system an excellent option for district energy supply, such as those encountered in university campuses [2]  
A similar MG [1] was implemented at the Illinois Institute of Technology (IIT). The total generation capacity (12 MW) included natural gas turbines, solar generation, wind generation, backup generation such as batteries (BESS), and small storage devices. IIT's MG can be operated in two modes: grid-connected and islanded mode, and it is in compliance with IEEE 1547 standard on islanding and reconnection [3]. Different research has been developed to improve the IIT MG. For example, the implementation of high reliability distribution system (HDRS) with the capacity to supply AC and DC loads [4,5]. In that sense, other authors have been researching key performance indicators to obtain real contribution from the MG. In these studies, the reduction in energy consumption, increase's percentage of power generation from renewable resources, air quality and others highlight as key indicators, as you can be seen in [9]. Other features of the MG are also considered. For example, in [10] the optimal design and financial feasibility is researching. This study is carried out to investigate the technical and financial feasibility of deploying a microgrid in a university campus. This paper addresses the location of MG, which can house quarter an emergency operations center (EOC). It also describes its operation, size, and definition of the electrical lines and switches, etc. The aim is to propose a methodology to design, model and simulate a MG for areas in university campuses that operates critical loads and offers services to the local communities. The contributions of this paper are defined as follows:  
* study and define critical loads of university campuses;
* analyze the local energy resource and determine the sources of renewable and non-renewable energy that can be used in a MG;
* analyze storage systems to determine the percentage of renewable penetration that can affect the system dynamics;
* determine the most suitable infrastructure of the distribution system for implementing a MG;
* propose a MG that complies with the current local and international regulations and guides. This document is divides in several sections. Section 2 presents the mathematical formulation of the MG design problem. Section 3 describes the proposed and developed methodology to design a MG for a university campus. Section 4 discusses the test scenario used for the validation of the proposed methodology. This also included the minimum requirements and regulations for the design of a MG.