A Novel Power Management Scheme for Distributed Generators in a DC Microgrid

The energy management scheme is a desirable solution to integrate multiple renewable energy generators into the network and operate them synchronously. Controlling the energy shared between different distributed generators is an important consideration for the stabilized operation of the electricity grid. In this thesis work, a new method with the concept of fall control technique is used and is designed to control the power of each individual generator in the particular DC network. The proposed energy management scheme can be widely applied to the grid connected to the grid and to the grid isolated from the electricity grid to obtain high energy distribution efficiency and also provide greater stability. An efficient power control method for sharing the power required by the load is designed based on the drop control concept. The proposed controller can be applied to a single distributed generator to adjust its output power quickly and accurately. The power sharing control method was formulated, modeled and verified by simulating transient stability and steady state test studies. The optimal coupling resistance for power sharing was also identified. Controller interaction and communication delay were also investigated. Communication delay interference is negligible for the shared power controller. The system is simulated in the MATLAB / SIMULINK environment.