University of Tennessee Research Foundation

Lin Zhu

Yilu Liu

Fei Wang

Leon Monroe Tolbert

Yiwei Ma

He Yin

Wenpeng Yu

Dingrui Li

Weikang Wang

Chujie Zeng

Ishita Ray

Xiaojie Shi

Methods, systems, and computer readable mediums for protecting and controlling a microgrid with a dynamic boundary are disclosed. One method includes detecting a fault in a microgrid that includes a dynamic point-of-common-coupling (PCC), in response to determining that the microgrid is operating in a grid-connected mode, isolating the fault by tripping a microgrid side smart switch and a grid side smart switch that are located immediately adjacent to the fault, initiating the reclosing of the grid side smart switch, and initiating the reclosing for the microgrid side smart switch via resynchronization if the grid side smart switch is successfully reclosed, and in response to determining that the microgrid is operating in an islanded mode, isolating the fault by tripping a microgrid side smart switch that is located immediately adjacent to the fault, and initiating the reclosing of the microgrid side smart switch.

Methods, systems, and computer readable media for protecting and controlling a microgrid with a dynamic boundary

A method includes performing by a processor: receiving a plurality of synchrophasor measurements of a power system signal associated with a time interval from a plurality of phasor measurement units (PMUs), respectively, each of the plurality of synchrophasor measurements including a phase angle, frequency value, and a timestamp associated with the synchrophasor measurement; determining, for each of the plurality of PMUs, a dominant mode frequency of a forced oscillation signal component of the power system signal based on the frequency value and the phase angle; determining, for each of the plurality of PMUs, a mode angle of the forced oscillation signal component at the dominant mode frequency; and determining a geographic forced oscillation source location for a source of the forced oscillation signal component based on the plurality of mode angles associated with each of the plurality of PMUs, respectively, and geographic locations of the plurality of PMUs.

Forced oscillation source location determination based on oscillation mode angle analysis using synchrophasor data

An energy system includes a microgrid including a network of at least one distributed energy resource and a plurality of loads, the at least one distributed energy resource being configured to supply power to the plurality of loads. The microgrid is configurable to connect to one of a plurality of feeder circuits of a main power grid at one of a plurality of coupling interface locations, respectively. The microgrid is also configurable to expand or shrink its power supply area according to the available power generation capabilities.

Microgrids with dynamically configurable boundaries including multiple main grid feeder coupling locations and methods of operating the same

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Knoxville, TN, United States of America

Lin Zhu