North Carolina State University

Battelle Memorial Institute

Total Sa

Xiangqi Zhu

Ning Lu

Wente Zeng

Jesse T Holzer

Yuri Makarov

Nader A Samaan

Renke Huang

Mallikarjuna Vallem

Bharat Vyakaranam

Jiahong Yan

Marcelo A Elizondo

David Mulcahy

Catherine McEntee

Xinda Ke

Catherine Mcentee

Systems and methods are described for coordinating volt-var control between sub-transmission and distribution systems. Distributed energy resources of a distribution system are aggregated into virtual power plants from which reactive power can optimally be dispatched to the sub-transmission system. A sub-transmission controller executes a volt-var AC optimal power flow optimisation function to minimize voltage fluctuations that might otherwise occur when coordinating with a distribution system having distributed energy resources. The distribution system can use a sensitivity matrix for regulating voltage at distribution feeders while fulfilling a transmission or sub-transmission system's demand requests.

Coordinated voltage control and reactive power regulation between transmission and distribution systems

A method and system for sizing energy storage device capacity. The method includes generating a load profile of at least an entity based on at least information acquired by a user interface, generating an ensemble of net load profiles based on at least the load profile and based on at least one energy source profile, determining values of cumulative distribution functions associated with a plurality of energy storage device capacities as a function of at least the ensemble of net load profiles, generating a graphical representation of a combination of the composite cumulative distribution functions and a cluster of equal probability line, rendering the graphical representation, and sizing a capacity of the energy storage device based on the rendered graphical representation.

System and method for sizing a capacity of an energy storage device

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Arvada, CO, United States of America

Xiangqi Zhu