Some patents look obscure until you see the grid problem they solve. US10892682B2, granted to EPC Power Corporation on January 12, 2021, claims a converter with a controllable DC offset — the kind of feature that sounds like a footnote and turns out to be a grid-support knob.
The CPC tags are pure power electronics: H02M 3/158 (DC-DC step-up/down regulation), H02M 7/2173 (conversion with control), H02M 3/335 (DC-DC with transformer). On its own that reads like a component patent. The grid relevance comes from what a controllable offset lets you do at the point of common coupling.
Here is the mapping. As distribution feeders fill with solar and storage inverters, voltage can drift and phases can become unbalanced. A converter that can intentionally bias its output gives operators a fine control over local voltage and over how the inverter contributes to or corrects imbalance. The feature in the patent is, in grid terms, a voltage-regulation lever.
What the patent does not claim is the grid application itself — claim 1 is about the converter's capability. The grid use is a consequence, not a limitation. That keeps the patent broad as a component claim but means it does not fence off any particular grid-support strategy.
From patent to grid, the lesson is that the deployment bottleneck — feeders that cannot absorb more distributed generation without voltage problems — is partly an electronics problem, and the electronics IP being filed in 2021 already anticipated it. A controllable-offset converter is one of the quiet tools that makes high-penetration inverter grids workable.