The document discusses a distributed simulation of a power grid using OpenMPI and MATLAB/Simulink. The simulation breaks a power grid model into multiple processes across nodes to reduce computational loads and enable simulation of large-scale systems. It implements the simulation using MPI-enabled Simulink blocks to distribute a model of a typical Newark residence and its power usage over 24 hours across nodes in the ORBIT testbed network. The results matched those of a single-processor simulation, verifying the distributed system.