Microgrids (MG) are small-scale electric grids with local voltage control and power management systems to facilitate the high penetration grid integration of renewable energy resources (RES). The distributed generation units (DGs), including RESs, connected (micro) through electronics-based inverters. Therefore, new paradigms required for frequency regulation by inverter-interfaced DGs (IIDGs)....

Title: Generation Control in Small Isolated Power Systems This thesis is concerned with the generation control in small isolated power systems consisting of inverter interfaced generation systems. First the components of an individual distributed generation system (DGS) as well as the corresponding control schemes for active and reactive power flow are discussed and implemented. Then the contri...

This paper proposes a fully distributed control methodology for secondary control of AC microgrids. The control framework includes three modules: voltage regulator, reactive power regulator, and active power/frequency regulator. The voltage regulator module maintains the average voltage of the microgrid distribution line at the rated value. The reactive power regulator compares the local normal...

This paper proposes a fully distributed control methodology for secondary control of AC microgrids. The control framework includes three modules: voltage regulator, reactive power regulator, and active power/frequency regulator. The voltage regulator module maintains the average voltage of the microgrid distribution line at the rated value. The reactive power regulator compares the local normal...

A novel droop controller that ensures a desired inverter current limitation and guarantees the stable operation of inverter-based microgrids under extreme load conditions, is proposed in this paper. Opposed to existing dq framework-based controllers align output voltage on d axis, here aligned axis order achieve two main goals: i) RMS value each during transients, without need for saturation un...

In this paper, we study the interactions among interconnected autonomous microgrids, and develop a joint energy trading and scheduling strategy. Each interconnected microgrid not only schedules its local power supply and demand, but also trades energy with other microgrids in a distribution network. Specifically, microgrids with excessive renewable generations can trade with other microgrids in...

This paper proposes a service restoration model for unbalanced distribution systems and inverter-dominated microgrids (MGs), in which frequency dynamics constraints are developed to optimize the amount of load guarantee dynamic performance system response during process. After extreme events, damaged can be sectionalized into several isolated MGs restore critical loads tripped non-black start d...

A frequency and voltage control strategy based on a decentralized communication-less approach is proposed in this work applied to Photovoltaic-Storage-Microturbine islanded Microgrids (MGs). The the Model Predictive Control (MPC) technique. Thanks use of local measurements, each source can nullify steady-state errors by means dedicated MPC controller. Consequently, unifies advantages classic dr...

Public low voltage feeders containing a mixture of several micro-sources, distributed energy storage units (ESUs) and controllable loads, which appear to the upstream distribution network as controllable entities, are known as MicroGrids. Through intelligent co-ordination of micro-generators and ESUs, coupled with demand side management techniques, MicroGrids have the potential to offer signifi...