In this paper, a robust local controller has been designed to balance the power for distributed energy resources (DERs) in an islanded microgrid. Three different DER types are considered in this study; photovoltaic systems, battery energy storage systems, and synchronous generators. Since DER dynamics are nonlinear and uncertain, which may destabilize the power system or decrease the performanc...

Enabling deep penetration of distributed energy resources (DERs) requires comprehensive monitoring and control of the distribution network. Increasing observability beyond the substation and extending it to the edge of the grid is required to achieve this goal. The growing availability of data from measurements from inverters, smart meters, EV chargers, smart thermostats and other devices provi...

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The introduction of distributed energy resources (DER) in radial parts of the grid, at low and mediumvoltage levels, may adversely impact the operation of the protection. Synchronous and induction generators contribute to the fault current, creating a second path next to the fault-current contribution from the grid. This may lead to fail-to-trip as well as incorrect trip of protection based on ...

Dedication This dissertation is dedicated to my loving wife. Her continued support and unconditional love have provided me enough energy and time to continue and finish my research. This work is also dedicated to my parents, who have been beyond patient and have always been there when I needed them. Their love for their children is beyond any that I have ever witnessed. 4 Acknowledgments I woul...

As the gap between supply and demand of electrical power is getting wider the continuous power supply is not possible for all at the same time. Existing power grid is not well suited for 21 century power flow from generation to end user. To focus on the challenges of 20 century grid like blackout, Power discontinuity, Frequency variation, etc. the new concept of smart grid emerged. It is expect...

Recently, there has been great interest in the integration of large numbers of small generation and storage resources at the distribution level. This will require new control strategies for efficient system performance. One issue that has not been addressed sufficiently is the coordinated dispatch of large numbers of these units. In this paper, an optimal distribution power flow strategy is pro...

We consider the problem of dispatching a fleet of distributed energy reserve devices to collectively meet a sequence of power requests over time. Under the restriction that reserves cannot be replenished, we aim to maximise the survival time of an energy-constrained network; and we discuss realistic scenarios in which this might be the ultimate goal of the grid operator. We present a policy tha...

This paper presents unbalanced active distribution system analysis with renewable distributed Energy Resources (DER). The renewable DER models have been considered are photovoltaic (PV) and Wind Turbine generation (WTG). The three-phase distribution load flow on the basis of the symmetrical components has been used in the analysis. The unbalanced active distribution system has been analized usi...