Caterpillar Inc.

Sowmya Nagesh

Srideep Chatterjee

Suresh Baddam Reddy

Joshua Lynn Ratts

Kevin J Sergott

Matthew Colin Mowers

Tyler V Richards

Hrishi Lalit Shah

Vineeth Wilson

Ranjay Singh

Manoj Kumar Bantupalli

A microgrid controller of a microgrid includes one or more memories configured to store a plurality of state-of-charge (SOC) setpoints corresponding to one or more energy storage systems (ESSs), a lower dispatch threshold that varies based on the plurality of SOC setpoints, and an upper dispatch threshold that varies based on the plurality of SOC setpoints. The microgrid controller is configured to calculate a total load allocated to a plurality of energy resource systems, measure a current SOC of the one or more ESSs, determine an aggregate output power of one or more non-ESSs based on a relationship of the total load relative to the lower dispatch threshold and the upper dispatch threshold for the current SOC, configure the one or more non-ESSs to provide the aggregate output power, and set the one or more ESSs into one of a plurality of operation states based on the relationship.

Energy storage system dispatch strategy for multiple non-energy-storage systems with charge restrictions

Systems and methods are disclosed for controlling distributed energy resources. Controllers in a peer-to-peer network are configured to act as a dispatch handler for electrical buses connected to respective set of power assets and loads. The controllers are configured to broadcast micro-grid configuration information over the peer-to-peer network to each controller. Each controller is configured to determine a segmentation of the electrical buses into isolated micro-grids; and assign a controller as a supervisor for each of the isolated micro-grids. The controllers are configured such that supervisor controller assigned to isolated micro-grid is configured to determine dispatch commands for power assets associated with the isolated micro-grid to handle load requirements and broadcast the determined dispatch commands over the peer-to-peer network. Each controller is configured to transmit determined dispatch commands to power assets electrically connected to the electrical bus for which the controller acts as dispatch handler to handle the load requirements.

Systems and methods for control of distributed energy resources

An aftertreatment system for a diesel engine may include a diesel particulate filter configured for placement in fluid communication with the diesel engine to receive an exhaust flow. The system may also include a selective catalytic reduction system configured for arrangement downstream of the diesel particulate filter and a NOsensor configured to measure a NOconcentration in the exhaust flow entering the selective catalytic reduction system. The system may also include a controller configured to estimate a ratio of NOto NOdownstream of the diesel particulate filter and based on a factor affecting the generation of NOupstream of the selective catalytic reduction system. The controller may also be configured to adjust the measured NOconcentration based on the ratio to provide an estimated actual NOconcentration and dose diesel exhaust fuel into the exhaust flow based on the estimated actual NOconcentration.

Aftertreatment system

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Peoria, IL, United States of America

Sowmya Nagesh