Work Package E : "Investigation 
        of Safety and Protection Requirements"
      
 Work Package Leader 
        : UMIST
      Partners involved :  
        ICCS, EDP, PPC, INESC, EPRI 
       Objectives :
       A MicroGrid 
        is subject to the same safety requirements as any utility electric power 
        system and this WP will provide proposals (supported by analysis and simulation) 
        to ensure the MicroGrid can be operated safely. In particular the following 
        areas will be addressed:
      
        -  
          
 Earthing (Grounding) 
            of the MicroGrid and its connection to the utility network.
 
        -  
          
Fault currents within 
            the MicroGrid (during both islanded and interconnected operation)
 
        -  
          
 Step and touch potentials 
            in the event of  faults
 
        -  Techniques for electrical 
          protection given the low contribution to short circuits from many inverters
 
      
       Speed of response of the 
        electrical protection and hence implications for stability
       Description of work :
      
         
          |    
              Task 5.1   | 
             Earthing 
              (Grounding)  | 
        
         
          |    Task 
              5.2  | 
             Fault 
              current contributions  | 
        
         
          |    Task 
              5.3  | 
             Step 
              and Touch Potentials  | 
        
         
          |    Task 
              5.4  | 
             
              Electrical Protection  | 
        
         
          |    Task 
              5.5  | 
             Stability  |