US 11,735,926 B2
Solar PV and AC source power blending controller
Nikola Milivojevic, Boulder, CO (US); Yusuf Gurkaynak, Arvada, CO (US); and Vivek Sankaranarayanan, Boulder, CO (US)
Assigned to PREMIER ENERGY HOLDINGS, INC., Frederick, CO (US)
Filed by PREMIER ENERGY HOLDINGS, INC., Frederick, CO (US)
Filed on Nov. 8, 2021, as Appl. No. 17/521,289.
Application 17/521,289 is a continuation in part of application No. 16/634,058, granted, now 11,171,486, previously published as PCT/US2018/043485, filed on Jul. 24, 2018.
Claims priority of provisional application 62/536,161, filed on Jul. 24, 2017.
Prior Publication US 2022/0131383 A1, Apr. 28, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H02J 3/38 (2006.01); H02J 1/10 (2006.01); H02J 7/34 (2006.01); H02J 3/32 (2006.01)
CPC H02J 3/381 (2013.01) [H02J 1/102 (2013.01); H02J 3/32 (2013.01); H02J 7/34 (2013.01); H02J 2300/26 (2020.01)] 23 Claims
OG exemplary drawing
 
1. An energy blending device having a first input configured for receiving alternating current (AC), a second input configured for connection to solar panels, and a first AC output, the energy blending device comprising:
a rectifier receiving the first input, and coupled to power an energy blending node;
the second input coupled to power the energy blending node through a first boost circuit,
the energy blending node coupled to power a first variable frequency motor drive (VFD) coupled to drive the first AC output; and
a microcontroller coupled to control the first boost circuit and first VFD; and
wherein the microcontroller is configured to receive inputs from sensors adapted to measure voltage, current, and frequency provided by the first VFD, the microcontroller being configured to control voltage of the energy blending node, the microcontroller configured to operate the first boost circuit to track a maximum power point (MPP) of any photovoltaic power source coupled to the second input, and the microcontroller is configured to start the first VFD at reduced frequency and voltage, and to then increase frequency and voltage of the first VFD to match power coupled through the first VFD to available power.