HVDC Transmission for Renewable Integration Patent Landscape
HVDC Transmission for Renewable Integration Patent Landscape in 2026
General Electric and its affiliated entities dominate this field, collectively anchoring the top four ranked positions among the hundred largest filers in a moderately concentrated but still-growing space. Annual filing activity has expanded 42% over the recent window, with power-conversion and grid-systems technologies accounting for the overwhelming share of disclosed innovation.
General Electric leads a concentrated but multi-player field
General Electric Co holds the top position with 91 patent records, followed by Hitachi Energy Ltd at 62 and GE Energy Power Conversion Technology Ltd (GB) at 50 — the three alone account for a substantial portion of the hundred largest filers’ combined output.
The top five filers — General Electric Co, Hitachi Energy Ltd, GE Energy Power Conversion Technology Ltd (GB), General Electric Tech GmbH, and Rajiv Kumar Varma — together represent 38% of the hundred largest filers’ combined patent records, signaling meaningful concentration at the top tier with a visible gap before the mid-tier players such as LSIS Co Ltd and Hamilton Sundstrand Corp (20 records each).
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | General Electric Co | 91 | |
| 2 | Hitachi Energy Ltd | 62 | |
| 3 | GE Energy Power Conversion Technology Ltd (GB) | 50 | |
| 4 | General Electric Tech GmbH | 37 | |
| 5 | VARMA RAJIV KUMAR | 25 | |
| 6 | LSIS Co Ltd | 20 | |
| 7 | Hamilton Sundstrand Corp | 20 | |
| 8 | Siemens AG | 16 | |
| 9 | ABB (Schweiz) AG | 16 | |
| 10 | Hitachi Ltd | 14 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Indian Institute of Technology | 10 | |
| 12 | Shell Internationale Research Maatschappij BV | 10 | |
| 13 | CET Power Luxembourg SA | 10 | |
| 14 | Supergrid Institute SAS | 10 | |
| 15 | Zhejiang University | 10 | |
| 16 | University of Cape Town | 10 | |
| 17 | Resilient Power Systems LLC | 10 | |
| 18 | NR Electric Co Ltd | 10 | |
| 19 | NR Engineering Co Ltd | 10 | |
| 20 | Universite Grenoble Alpes | 10 |
The dominance of GE-affiliated entities across three of the top four positions suggests a deliberate portfolio strategy spanning AC/DC power conversion, grid interconnection, and rotating-machine controls; challengers entering must navigate a dense claim landscape in those core branches.
The most recent 18–24 months of data are subject to publication lag and should be treated as under-counts; the 2025–2026 figures in particular will rise as pending applications are published. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Filing activity is rising on a multi-year basis; power conversion and grid systems dominate the technology mix
The annual trend chart reveals a field in sustained growth punctuated by a notable 2023 peak, while the technology-composition chart shows that two IPC classes — grid systems and power conversion — account for the large majority of all disclosures.
Annual filing trend
Filings climbed from 44 in 2017 to a peak of 73 in both 2023 and 2024 before the 2025 figure drops to 35 — a drop that reflects publication lag rather than a real decline. The 42% multi-year growth figure confirms the underlying upward trajectory; engineers should treat 2025–2026 counts as provisional.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H02J (Power supply and grid systems) leads with 656 patent records, followed by H02M (Power conversion, AC/DC) at 367. All other branches — including H02H (Protective circuits), G05B (Control systems), and F03D (Wind turbines) — each contribute fewer than 50 records, confirming that core converter and grid-interface IP is where competition is densest.
↗ 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.
Hybrid high voltage direct current converter stati…
An objective of the invention to provide a hybrid converter station for HVDC system and the method operating the same. The hybrid rectifier station for high voltage direct current system includes: at least one AC bus; at least one line commutated converter configured to convert a portion of AC power supplied from the at least one AC bus to DC power… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | System, method, rotating machine and computer prog… | 333 |
| 2 | Collection of electric power from renewable energy… | 211 |
| 3 | Pulse width modulated control for hybrid inverters | 130 |
| 4 | System, method, rotating machine and computer prog… | 128 |
| 5 | Novel multi-level converter topology with the poss… | 124 |
| 6 | Modular converter with multilevel submodules | 114 |
| 7 | Bi-directional multilevel AC-DC converter arrangem… | 97 |
| 8 | Electric power system based on renewable energy so… | 88 |
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
Four dimensions — maturity, concentration, collaboration, and geography — define the strategic context for any team evaluating entry or expansion in HVDC for renewable integration.
Growth stage: 42% multi-year expansion with activity rising
The lifecycle evidence classifies this field as Growth, with annual filings rising and the multi-year window up 42%. The 2023–2024 peak at 73 filings per year represents the highest recorded annual volume in the dataset. Teams entering now face an active but still-open landscape rather than a mature, fully saturated one.
Growth stageTop five hold 38% of the hundred largest filers’ output
The top five filers collectively account for 38% of the hundred largest filers’ combined patent records, with GE-affiliated entities occupying three of those five slots. The mid-tier — LSIS Co Ltd, Hamilton Sundstrand Corp, Siemens AG, ABB (Schweiz) AG — each hold materially fewer records, creating a visible tier gap. New entrants face dense prior art in converter and grid-interface branches but have more room in adjacent control and protection classes.
Moderate concentrationABB–Hitachi Energy pairing is the most active co-filing relationship
The most frequent co-filing pair is ABB (Schweiz) AG with Hitachi Energy Switzerland AG, with 7 joint records — reflecting the post-merger organizational overlap between those entities. General Electric Co and Equinor Energy AS have co-filed on 4 records, indicating an operator–OEM collaboration channel. Hitachi Energy Ltd also co-files with both ABB (Schweiz) AG and Hitachi Energy Switzerland AG, pointing to active intra-group portfolio coordination.
Consolidation-driven co-filingUnited States and EPO lead; India is the fourth-largest jurisdiction
The United States leads with 267 patent records, followed by EPO at 178 and WIPO (PCT) at 97. India ranks fourth at 77 records — notably ahead of Germany (39), Australia (32), and Canada (32) — likely reflecting the academic and independent-inventor activity visible in the applicant list. China holds only 12 records in this corpus, suggesting either a portfolio gap or a distinct domestic filing strategy outside the scope captured here.
US-centric with broad PCT reachGo 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 Switzerland AG | 7 |
| General Electric Co | Equinor Energy AS | 4 |
| Hitachi Energy Ltd | Hitachi Energy Switzerland AG | 2 |
| Hitachi Energy Ltd | ABB (Schweiz) AG | 2 |
| VARMA RAJIV KUMAR | University of Western Ontario | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
General Electric and Hitachi Energy lead by volume; technology emphasis differs
The top two filers share grid-systems and power-conversion as primary branches but differ in emphasis: General Electric Co concentrates on AC/DC conversion hardware, while Hitachi Energy Ltd anchors its portfolio in grid-system interconnection.
General Electric Co
General Electric Co holds 91 patent records — the largest single-applicant position in this corpus. Its technology focus is led by H02M 7 (AC/DC power conversion, 68 records), followed by H02J 3 (grid systems, 45 records) and H02M 1 (power conversion fundamentals, 24 records), indicating deep investment in converter hardware for grid tie-in. Recent-period momentum is flagged as a new entrant pattern in the most recent window (2 recent records), which likely reflects reclassification of activity across the GE-affiliated entities rather than a genuine pullback.
patent records: 91Hitachi Energy Ltd
Hitachi Energy Ltd ranks second with 62 patent records and shows a new-entrant trajectory in the most recent window (35 recent records), indicating rapidly accelerating disclosure activity under the Hitachi Energy brand following the ABB Power Grids acquisition. Its primary focus is H02J 3 (grid systems, 41 records), with secondary positions in H02J 7 (charging/storage grid integration, 12 records) and H02M 7 (AC/DC conversion, 11 records) — a profile weighted toward grid architecture rather than converter hardware.
patent records: 62| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| General Electric Co | 2 | ▲ new entrant |
| Hitachi Energy Ltd | 35 | ▲ new entrant |
| General Electric Tech GmbH | 3 | ▼ -87% |
| ABB (Schweiz) AG | 2 | ▲ new entrant |
| Hamilton Sundstrand Corp | 2 | ▲ new entrant |
| VARMA RAJIV KUMAR | 3 | ▲ new entrant |
Under-served adjacent branches in HVDC protection and control
Compared with the dominant H02J and H02M branches, several adjacent IPC classes hold relatively sparse patent records despite clear technical relevance to HVDC for renewable integration; these are observations of relative sparsity, not validated commercial opportunities.
H02H · Protective circuit arrangements
H02H carries only 49 patent records — roughly 3% of all branch-level records in the corpus — despite fault protection being a well-recognized engineering challenge in multi-terminal HVDC grids fed by variable renewable sources. DC fault detection and isolation hardware remains technically demanding and commercially relevant for meshed offshore grids. Teams with competencies in fast-acting DC breakers or converter-level protection logic may find room to differentiate, given the limited existing claim density relative to H02J and H02M.
Search this in Eureka →G05B · Control & regulating systems
G05B holds 45 patent records — also approximately 3% of branch-level records — despite the growing importance of advanced control strategies (e.g., model-predictive control, adaptive droop) for coordinating multiple renewable sources over long-distance HVDC links. The combination of sparse patent density and evident technical need makes this an adjacent branch worth monitoring. Entry paths likely exist at the intersection of real-time control software and HVDC converter modulation, though overlap with H02J and H02M claims should be carefully assessed.
Search this in Eureka →How leading applicants differ across technology routes
Strength of each leader across the main technology routes.
| Player | H02J 3 · Power supply & grid systems | H02M 7 · Power conversion (AC/DC etc.) | H02M 1 · Power conversion (AC/DC etc.) | H02J 1 · Power supply & grid systems | H02J 7 · Power supply & grid systems |
|---|---|---|---|---|---|
| General Electric Co | Strong · 45 | Strong · 68 | Moderate · 24 | Emerging · 13 | Absent |
| Hitachi Energy Ltd | Strong · 41 | Moderate · 11 | Emerging · 7 | Absent | Moderate · 12 |
| General Electric Tech GmbH | Strong · 36 | Moderate · 11 | Moderate · 10 | Emerging · 6 | Absent |
| GE Energy Power Conversion Technology Ltd (GB) | Strong · 13 | Strong · 18 | Strong · 13 | Absent | Absent |
| VARMA RAJIV KUMAR | Strong · 16 | Strong · 10 | Absent | Absent | Emerging · 3 |
| Hamilton Sundstrand Corp | Absent | Absent | Absent | Strong · 13 | Strong · 16 |
Frequently asked questions
The corpus contains 432 patent families in scope. The applicant ranking is based on patent records, where a single family filing in multiple offices can contribute to more than one record.
General Electric Co holds the top position with 91 patent records, ahead of Hitachi Energy Ltd (62) and GE Energy Power Conversion Technology Ltd (GB) (50). GE-affiliated entities occupy three of the top four ranked positions.
Yes. The lifecycle evidence classifies the field as Growth, with a 42% increase in filings over the recent multi-year window. Annual filings peaked at 73 in both 2023 and 2024; the lower 2025 figure reflects publication lag rather than a real slowdown.
H02J (Power supply and grid systems) leads with 656 patent records, followed by H02M (Power conversion, AC/DC) at 367. All other branches — including H02H, G05B, and F03D — each hold fewer than 50 records, confirming the concentration of IP in converter and grid-interface technologies.
The United States leads with 267 patent records, followed by EPO (178), WIPO/PCT (97), and India (77). Germany, Australia, and Canada follow. China holds 12 records in this corpus, which may reflect a separate domestic filing strategy not fully captured here.
The most active co-filing pair is ABB (Schweiz) AG and Hitachi Energy Switzerland AG with 7 joint records, reflecting the organizational history between those entities. General Electric Co and Equinor Energy AS have 4 co-filed records, and Rajiv Kumar Varma has co-filed with the University of Western Ontario on 1 record.
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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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