Adaptive control of hybrid ultracapacitor-battery storage system for photovoltaic output smoothing
AssigneeNEC Laboratories America, Inc.
InventorsYanzhu Ye, Ratnesh K. Sharma, Di Shi
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Abstract
A hybrid ultracapacitor-battery energy storage system is integrated with a photovoltaic system to help solve fluctuations. A fuzzy-logic-based adaptive power management system enables optimization of the power/energy distributions and a filter-based power coordination layer serving as a rudimentary step for power coordination among the hybrid storage system and a fuzzy-logic-based control adjustment layer that keeps monitoring the operation status of all the energy storage devices, taking into account their dynamic characteristics, and fine-tuning the control settings adaptively.
Claims19
A system comprising;
- a fuzzy logic-based adaptive power management system;
- a photovoltaic system;
- a first capacitor based energy storage system;
- a second battery energy based storage system;
- and
- a storage of knowledge of system operation and operation of energy storage related devices within the system,
- wherein the management storage system communicates with the photovoltaic system, first capacitor and battery based energy system and storage of knowledge to influence energy fluctuations ahead of detailed control loops in power electronic devices, the fuzzy logic based adaptive system includes a filter based power coordination layer for power conditioning among the energy based storage system and a fuzzy logic based control adjustment for monitoring operational status of all energy storage devices taking into account their dynamic characteristics to fine tune control settings with the system adaptively and influence optimal power or energy distributions within the system.
A method comprising;
- employing a fuzzy logic-based adaptive power management system in a an electrical energy system;
- coupling a photovoltaic system to the power management system;
- coupling a first capacitor based energy storage system to the power management system;
- coupling a second battery energy based storage system to the power management system;
- and
- coupling a storage of knowledge of system operation and operation of energy storage related devices within an electric energy system to the power management system,
- the management storage system communicating with the photovoltaic system, first capacitor and battery based energy system and storage of knowledge for influencing energy fluctuations ahead of detailed control loops in power electronic devices, the fuzzy logic based adaptive system including a filter based power coordination layer for power conditioning among the energy based storage system and a fuzzy logic based control adjustment for monitoring operational status of all energy storage devices taking into account their dynamic characteristics for fine tuning control settings with the system adaptively and influencing optimal power or energy distributions within the system.
Dependencies are inferred from the claim text.