Hybrid Microinverter Optimizes Integration of Renewable Energy Sources

Abstract

The University of Central Florida invention is a hybrid microinverter module that can optimize the integration of renewable energy sources, particularly photovoltaic (PV) cells, with energy storage systems and traditional electrical grid or alternating current (AC) loads. The portable, versatile multi-port/multi-mode inverter operates in several modes to transfer power between different ports, enabling AC output from a PV-integrated system. This sustainable source has grid-forming capability by which several systems can be connected to each other to supply the same load. It can be used for residential and industrial applications including utility applications. For example, a PV farm can use the system since the integration of the PV and battery provides a stable and uninterrupted power source supply.

The invention overcomes the challenges of existing systems in which the PV, battery, and hybrid inverter are separate and therefore difficult to combine into one system that can work harmoniously. Also, the PVs have no hybrid inverter, and all PV systems must be installed by a technician. In contrast, the UCF design introduces a hybrid microinverter that is at the PV power level in an easy plug-and-play system.

Technical Details: The UCF invention PV cells and combined hybrid microinverter systems can each be monitored and managed by the firmware. They offer the following capabilities:

• Grid-Tie Capability: When configured in a grid-tie mode, the hybrid inverters allow excess energy generated by PV cell to be fed back into the grid, often earning credits or compensation from utility companies. The converter can operate in both grid-forming and grid following. 
• Off-Grid Operation: When configured to function in off-grid mode, the inverters can provide power when the grid is unavailable. They manage energy storage systems, such as batteries, to store excess energy for later use.
• Energy Management: Excelling in energy management, the systems and methods intelligently decide when to draw power from PV, batteries, or the grid based on factors like energy demand, solar availability and battery state of charge.
• Backup Power: In the event of a grid outage, the hybrid microinverters have energy storage capabilities that can seamlessly switch to backup power mode, ensuring a continuous and reliable energy supply.

Partnering Opportunity: The research team is seeking partners for licensing, research collaboration, or both.

Stage of Development: Prototype available. 

Benefit

Market Application