This standard provides technical specifications and requirements for microgrid controllers. Additionally, there are informative annexes covering the description of the microgrid, the establishment of the functional specification, the structure of the microgrid control functions, and a bibliography. These are for informative purposes only, and can be referred to, but they are not required to be used in conjunction with this standard. A key element of microgrid operation is the microgrid energy management system (MEMS). It includes the control functions that define the microgrid as a system that can manage itself, operate autonomously or grid connected, and seamlessly connect to and disconnect from the main distribution grid for the exchange of power and the supply of ancillary services. The scope of this standard is to address the technical issues and challenges associated with the proper operation of the MEMS that are common to all microgrids, regardless of topology, configuration, or jurisdiction, and to present the control approaches required from the distribution system operator and the microgrid operator. Testing procedures are addressed. Scenarios and/or use cases for testing are identified in this standard for dispatch function and transition function respectively. These cases shall be tested according to IEEE P2030.8.1