In the near future, the use of energy sources such as solar and wind in power systems will increase. Microgrids are hybrid structures as formed the integration of renewable energy sources with conventional energy generation plants. Microgrids can provide uninterrupted energy for users. The power system must be operated correctly and effectively so that the power flow in the power system is continuous. The paper demonstrates a case study for a power flow analysis. First, the results were calculated and obtained in Matlab software by using the Gauss-Seidel method. Then the system was designed in the PowerWorld simulator and the success of both programs was examined