Energy Management and Control of Hybrid AC/DC Microgrid Using Fuzzy Logic Controller

Abstract

In a microgrid system, an energy management system is necessary to control the flow of power and energy between sources and loads and to provide high quality, safe, sustainable, and environment-friendly energy to consumers.it is a hybrid electrical system, low or medium-voltage, that includes small energy sources based on renewable resources as primary resources to provide high-quality electricity for small consumers, mostly operated in rural areas that are separated or isolated. To ensure the efficient Power Management and control, this article proposes an efficient Hybrid DC/AC microgrid using four renewable energy sources such as solar, wind, Biomass Generator and Lithium-ion batteries were chosen as storage system. The existence of both AC and DC microgrids has led to a new concept of hybrid AC/DC microgrids tied by an Interlinking Converter (ILC). It comprises a DC grid and AC grid interlinked by a bidirectional DC/AC converter. In addition, to provide higher voltages, the Multi-Input Booster (MIB) DC-DC converters are used as a power converter in between load and source to enforce and increase the PV depending on the voltage output signal. Further extract maximum power from the solar PV system, perturb and observe algorithm-based power point tracking control mechanism is proposed DC link voltage of ILC is regulated usually by DC side control in load sharing among sources in the DC microgrid. Adding up, to overcome the load fluctuation problem in a microgrid, this article introduced a Mamdani type 2 PID-fuzzy controller. Simulation Results reveal that the proposed type-II fuzzy PID controller can balance the power generation and demand properly and control both system frequency and tie-line power effectively