Battelle Memorial Institute

North Carolina State University

Yuri Makarov

Ning Lu

Jesse T Holzer

Xiangqi Zhu

Nader A Samaan

Bharat Vyakaranam

Renke Huang

Mallikarjuna Vallem

Pengwei Du

Marcelo A Elizondo

David Mulcahy

Catherine McEntee

Yu Zhang

Xinda Ke

Chunlian Jin

Shuai Lu

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 system and method of controlling aggregated thermostatically controlled appliances (TCAs) for demand response is disclosed. A targeted load profile is formulated and a forecasted load profile is generated. The TCAs within an 'on' or 'off' control group are prioritized based on their operating temperatures. The &#x201c;on&#x201d; or &#x201c;off&#x201d; status of the TCAs is determined. Command signals are sent to turn on or turn off the TCAs.

Controller for thermostatically controlled loads

A controller is disclosed for hybrid systems providing power to an electrical power grid. The controller reduces wear on hybrid systems by having only a fast unit tuned to track fluctuations of a regulation signal in a normal mode of operation. By contrast, the slow unit does not track fluctuations in the regulation signal in the normal mode of operation, which reduces wear on the slow unit. The normal mode of operation is defined by an energy range of the fast unit. Energy band parameters associated with the energy range can be dynamically modified in order to optimize the efficiency of the hybrid system.

Controller for hybrid energy storage

Growing community of inventors

Richland, WA, United States of America

Yuri Makarov