Microgrid Control for Utility Grid Patent Landscape 2026
Microgrid Control for Utility Grid Patent Landscape in 2026
Dynapower Company holds the largest share of a moderately concentrated field spanning 1,122 patent families, with the top five filers accounting for 27% of the hundred largest filers’ combined output. Annual filing volume peaked in 2020 and has since eased, placing the field in a post-peak phase where selective positioning in adjacent branches remains viable.
Dynapower leads a moderately concentrated field with a clear tier gap below the top five
Dynapower Company sits atop the top five together represent 27% of the hundred largest filers’ combined total, signaling moderate rather than extreme concentration.
A noticeable tier gap separates the top five from the next tier, which clusters between 33 and 20 patent families. Enphase Energy, King Fahd University of Petroleum and Minerals, Beijing Etechwin Electric, and Huawei Digital Power each occupy this secondary band, suggesting that specialist and institutional players have carved out meaningful but narrower positions.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Dynapower Company | 95 | |
| 2 | Hitachi Energy Ltd | 59 | |
| 3 | Siemens AG | 42 | |
| 4 | Caterpillar Inc | 41 | |
| 5 | ABB (Schweiz) AG | 36 | |
| 6 | Enphase Energy Inc | 33 | |
| 7 | King Fahd University of Petroleum and Minerals | 24 | |
| 8 | Beijing Etechwin Electric | 23 | |
| 9 | Huawei Digital Power Technologies Co Ltd | 23 | |
| 10 | Bloom Energy Corporation | 22 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 11 | Indian Institute of Technology | 21 | |
| 12 | Causam Energy Inc | 20 | |
| 13 | S&C ELECTRIC CO | 20 | |
| 14 | State Grid Corporation of China | 17 | |
| 15 | Neworld Energy LLC | 17 | |
| 16 | TOSHIBA ENERGY SYST & SOLUTIONS CORP | 16 | |
| 17 | Heila Technologies Inc | 16 | |
| 18 | Toshiba Corporation | 16 | |
| 19 | Schweitzer Engineering Laboratories Inc | 15 | |
| 20 | Hitachi Energy Switzerland AG | 15 |
Dynapower’s lead reflects deep focus on power supply and grid systems alongside power conversion, while the challengers diversify into adjacent control, measurement, and solar-integration subclasses. This spread implies that the field’s competitive boundaries are still being drawn at the subclass level rather than consolidated around a single dominant technology approach.
Filing counts for 2025 and 2026 are subject to publication lag and are likely under-counted; apparent softness in those years should not be read as a structural decline in activity. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Filing activity eased from its 2020 peak; power-grid systems dominate the technology mix
Two charts tell the story of where the field has been and where the innovation weight currently sits: an annual filing trend that reveals a post-peak trajectory, and a technology-class breakdown that shows H02J as the overwhelmingly dominant branch.
Annual filing trend
Annual filings rose from 114 in 2017 to a peak of 169 in 2020, then oscillated before a secondary rise to 150 in 2024. The 2025 and 2026 figures of 99 and 21 respectively reflect publication lag and should not be interpreted as a continued fall. The field’s lifecycle is best characterized as post-peak, with the multi-year window still above 2017 entry levels.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H02J (Power supply and grid systems) dominates the technology mix by a wide margin, reflecting the core grid-interconnection focus of this field. H02M (Power conversion), G05B (Control and regulating systems), and G06Q (Business and administrative data processing) form a meaningful secondary tier, while branches covering photovoltaics, electric vehicle propulsion, AI-based computing, and protective circuits each hold smaller but non-trivial shares.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Microgrid system and method of controlling same
A microgrid system and method of controlling same, the microgrid system comprising a storage battery (<b>5000</b>), an energy storage converter (<b>1000</b>), a monitoring circuit and a controllable switch (<b>2000</b>). When the microgrid system is in grid-connected mode, the energy storage converter outputs steady power under the control of an inner… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Systems and methods for advanced energy settlement… | 482 |
| 2 | Modular microgrid unit and method of use | 194 |
| 3 | Control of small distributed energy resources | 161 |
| 4 | Ac connected modules with line frequency or voltag… | 150 |
| 5 | 基于主从策略的微网系统协调控制方法 | 125 |
| 6 | Generator dispatching or load shedding control met… | 114 |
| 7 | Optimal control technology for distributed energy … | 113 |
| 8 | Control of small distributed energy resources | 107 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
What the competitive structure means for R&D investment decisions
Four structural dimensions — maturity, concentration, collaboration, and geography — frame the practical implications for engineers and strategists evaluating where to place R&D bets in this space.
Post-peak field: core H02J space is maturing, adjacent subclasses remain open
The lifecycle evidence labels this field as Decline, with annual filings easing back from the 2020 peak of 169 families. This does not mean opportunity is exhausted — it means the core H02J grid-interconnection subclass is becoming crowded and that differentiation will increasingly require moving into adjacent control, AI, or EV-integration branches. Entrants arriving now face a higher bar for novelty in the dominant class.
Post-peak · 2020 peakModerate concentration with a visible tier gap — room for specialists
The top five filers account for 27% of the hundred largest filers’ combined output, a level that is moderately concentrated but not monopolistic. The gap between the top five (36–95 patent families each) and the secondary cluster (20–33 families each) is large enough that a focused entrant building depth in an under-served subclass could realistically enter the secondary tier within a 3–5 year horizon. Academic and institutional players such as King Fahd University and Indian Institute of Technology already occupy that band.
Moderate concentrationABB–Hitachi Energy axis dominates co-filing; GE and Siemens show limited internal co-filings
The most active co-filing pairs are ABB (Schweiz) AG with Hitachi Energy Ltd at 15 joint families, ABB (Schweiz) AG with Hitachi Energy Switzerland AG at 13, and Hitachi Energy Ltd with Hitachi Energy Switzerland AG at 12. A further 10-family link connects ABB (Schweiz) AG with ABB Power Grids Switzerland AG. This cluster reflects the post-merger reorganization between ABB and Hitachi Energy entities. General Electric and GE Grid Solutions share 2 joint families, and Siemens AG co-files lightly with Siemens Corp and Siemens Industry. Outside this incumbent cluster, meaningful cross-company collaboration is sparse.
ABB–Hitachi axisUS leads filing jurisdictions; India and Australia are notable secondary destinations
The United States is the leading filing jurisdiction, followed by China and Europe via the EPO. India ranks fourth — unusually high for a hardware-intensive energy domain — likely reflecting both the Indian Institute of Technology’s institutional output and growing utility-scale microgrid deployment in South Asia. Australia’s presence in sixth position, ahead of Canada, points to active remote-grid and island-grid programs. PCT filings indicate that leading players are pursuing broad multi-jurisdictional protection strategies.
US-led · India risingGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| ABB (Schweiz) AG | Hitachi Energy Ltd | 15 |
| ABB (Schweiz) AG | Hitachi Energy Switzerland AG | 13 |
| Hitachi Energy Ltd | Hitachi Energy Switzerland AG | 12 |
| ABB (Schweiz) AG | ABB Power Grids Switzerland AG | 10 |
| Hitachi Energy Ltd | ABB Power Grids Switzerland AG | 10 |
| ABB (Schweiz) AG | ABB Research Ltd | 2 |
| Hitachi Energy Ltd | ABB Research Ltd | 2 |
| General Electric Company | GE Grid Solutions LLC | 2 |
| Siemens AG | Siemens Industry Inc | 1 |
| Siemens AG | SIEMENS CORP | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Dynapower anchors the field; Caterpillar and Hitachi Energy emerge as rising challengers
The top two positions are occupied by a pure-play microgrid specialist and a diversified power infrastructure incumbent, each with distinct technology emphases and contrasting momentum trajectories.
Dynapower Company
Dynapower Company leads with 95 patent families, concentrating heavily on H02J 3 (grid-interconnection power supply, 70 families) and H02J 7 (battery-charging grid systems, 27 families), supplemented by H02M 3 (DC power conversion, 24 families). This profile reflects a specialist position in grid-tied energy storage and inverter control. Momentum has slowed sharply — recent filings are down 80% versus the prior period — suggesting the core portfolio is maturing and future differentiation may require moves into conversion efficiency or software-defined control.
patent families: 95Caterpillar Inc
Caterpillar Inc holds 41 patent families and is classified as a new entrant in terms of recent filing momentum, with 25 families filed in the recent window — the highest recent-period count among the applicants with momentum data. Its technology focus spans H02J 3 (40 families), H02J 7 (13 families), and H02J 13 (remote grid monitoring, 7 families), pointing to a strategy centered on generator-backed microgrid control and remote-site energy management. This trajectory positions Caterpillar as the most active climber in the current period.
patent families: 41| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Dynapower Company | 2 | ▼ -80% |
| ABB (Schweiz) AG | 1 | ▼ -93% |
| Caterpillar Inc | 25 | ▲ new entrant |
| Enphase Energy Inc | 8 | ▼ -68% |
| Hitachi Energy Ltd | 5 | ▲ new entrant |
| King Fahd University of Petroleum and Minerals | 20 | ▲ new entrant |
| Beijing Etechwin Electric | 9 | ▲ new entrant |
| Bloom Energy Corporation | 13 | ▲ new entrant |
Under-served adjacent branches worth monitoring
Several IPC classes appear at lower share relative to the dominant H02J core, representing observations of relative sparsity; two are noted below where technical adjacency and plausible entry paths make them worth tracking.
G05B · Control & Regulating Systems
G05B accounts for 172 records at roughly 7% of the technology mix — a modest share given that advanced microgrid control inherently requires closed-loop regulation, optimization, and real-time supervisory control. The sparsity likely reflects a historical tendency to file microgrid control innovations under H02J rather than the more general G05B class. For R&D teams working on model-predictive control, hierarchical control architectures, or autonomous island-detection algorithms, filing explicitly under G05B could reduce crowding and improve differentiation. Entry is technically straightforward for existing H02J filers who extend their claims into control-system architectures.
Search this in Eureka →B60L · Electric Vehicle Propulsion (V2G Integration)
B60L covers electric vehicle propulsion and, by extension, vehicle-to-grid (V2G) bi-directional power flow — a use case that is directly relevant to microgrid frequency regulation and demand response. With only 69 records at approximately 3% of the mix, the intersection of microgrid utility control and V2G dispatch logic is sparse relative to its growing real-world deployment. Bloom Energy’s H01M fuel-cell focus and Enphase’s H02S solar-integration profile show that non-core energy assets are being patented; the V2G dispatch layer is an adjacent gap. Realistic entry paths include bi-directional inverter control claims that bridge H02J and B60L, particularly for fleet-scale or campus microgrid applications.
Search this in Eureka →How leaders differ across technology routes
Strength of each leader across the main technology routes.
| Player | H02J 3 · Power supply & grid systems | H02J 13 · Power supply & grid systems | H02J 7 · Power supply & grid systems | G06Q 50 · Business, commerce & admin data processing | H02J 9 · Power supply & grid systems |
|---|---|---|---|---|---|
| Dynapower Company | Strong · 70 | Absent | Moderate · 27 | Absent | Absent |
| Enphase Energy Inc | Strong · 32 | Strong · 17 | Moderate · 15 | Absent | Strong · 18 |
| ABB (Schweiz) AG | Strong · 56 | Moderate · 19 | Absent | Absent | Absent |
| Caterpillar Inc | Strong · 40 | Emerging · 7 | Moderate · 13 | Absent | Absent |
| Siemens AG | Strong · 41 | Moderate · 11 | Absent | Emerging · 4 | Absent |
| Hitachi Energy Ltd | Strong · 26 | Moderate · 10 | Absent | Absent | Absent |
| Neworld Energy LLC | Absent | Strong · 14 | Absent | Absent | Strong · 17 |
Frequently asked questions
The corpus contains 1,122 patent families in scope. This total spans all major filing jurisdictions and reflects activity over the analyzed multi-year window.
Dynapower Company leads with 95 patent families, ahead of Hitachi Energy Ltd at 59 and Siemens AG at 42. The top five filers collectively account for 27% of the hundred largest filers’ combined total.
The evidence classifies the field as post-peak (Decline stage), with annual filings having eased back from the 2020 peak of 169 families. Note that 2025 and 2026 counts are subject to publication lag and should not be read as confirming a continued structural decline.
The United States is the leading filing jurisdiction, followed by China and Europe via the EPO. India ranks fourth — higher than typical for hardware-intensive energy fields — with Australia in sixth place. PCT filings indicate broad multi-jurisdictional protection strategies among the leading applicants.
Caterpillar Inc is the most active recent filer with 25 families in the recent window and is classified as a new entrant by momentum trend. King Fahd University of Petroleum and Minerals (20 recent families), Beijing Etechwin Electric (9), and Bloom Energy Corp (13) are also classified as new entrants in the recent period. By contrast, Dynapower and ABB (Schweiz) AG show sharp recent-period slowdowns.
The dominant collaboration cluster involves ABB (Schweiz) AG, Hitachi Energy Ltd, Hitachi Energy Switzerland AG, and ABB Power Grids Switzerland AG, reflecting the corporate reorganization between ABB and Hitachi Energy. The most active pair is ABB (Schweiz) AG with Hitachi Energy Ltd at 15 joint families. Outside this cluster, meaningful cross-company collaboration is limited.
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Disclaimer. This page is generated from PatSnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
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