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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/microgrid-protection-coordination-patent-landscape/ · Patsnap · data cut-off 2026-07-31 · downloaded from the live page
Patent Landscape · Updated 2026Microgrid Protection Coordination Patents: Mapping Who Holds the Claims
- 63.6% concentration. The top 5 of 49 ranked assignees hold 35 of the 55 records in scope — a small group has already staked out most of the filed claim space.
- Filing has cooled from its 2021 peak. Activity ran 6 records in 2021 down to 2 in 2024, a -67% swing over that span, though 2025-26 counts are still filling in under publication lag.
- Protective circuitry dominates the class mix. H02H and H02J each sit near half of all 55 records, while adjacent control and measurement classes like G05B and G01R appear in a much smaller, more open slice.
55
Published Records
64%
Top-5 Share of All Records
-67%
Filing Growth 2021→2024
US
Leading Jurisdiction
Filing growth compares 2021 (6 records) with 2024 (2) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 55 records in scope (CR5), not by the ranked leaders only.
Published byPatsnap Research··6 min readSourced from Patsnap Eureka
Field Overview
What this patent landscape covers
Microgrid protection coordination sits at the intersection of relay engineering and inverter-dominated grid control: schemes that keep fault detection reliable when fault current is limited by power electronics rather than synchronous machines. The 55 records in scope span directional elements, communication-assisted tripping, adaptive setting-group switching and islanding detection — the toolkit needed when a feeder can no longer rely on the fault-current magnitudes that traditional overcurrent relays were built around. Patent families are used as the counting unit throughout because they neutralise continuation filings and multi-jurisdiction duplicates that would otherwise inflate raw document counts.
The scope draws on filings from 2015 through the mid-2026 data cut-off, with receiving offices led by the United States, WIPO's PCT route, and India, alongside Europe, Australia and Canada. That office mix signals a technology still primarily prosecuted by utility-equipment vendors and academic-adjacent inventors filing into a handful of major jurisdictions rather than a globally dispersed field.
Records by filing year, 2015-2026
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Microgrid Protection Coordination covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
The Numbers
Filing trend and technology composition
Two views of the same 55-record dataset: how filing activity has moved year over year, and which IPC subclasses carry the technical weight.
A 2021 peak, then a pullback
Filings rose from 3 records in 2017 to a peak of 6 in 2021, then fell to 2 by 2024 — a -67% move over that three-year window. Because publication trails filing by roughly 18 months, the 2025 and 2026 counts are still incomplete and should not be read as a continued decline.
Protective circuitry and grid supply lead the class mix
H02H (protective circuit arrangements) appears in 50.9% of the 55 records and H02J (power supply and grid systems) in 49.1%, confirming this is fundamentally a relay-and-topology field. G01R measurement claims sit at 21.8%, and control-oriented classes G05B, H04B, G05D, G06F and G05F each cover a materially smaller share — since records can carry multiple classes, these figures sum to more than 100%.
Shares are the percentage of the 55 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Source: Patsnap Eureka. Filing trend and technology composition. Derived from a Patsnap search on Microgrid Protection Coordination covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.
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The most-cited records in this space
Representative Filing
Methods and apparatus for detecting faults using a negative-sequence directional relay
HOOSHYAR, ALI
A fault detection and control system for a power-grid relay calculates negative-sequence impedance from voltage and current data at a directional element to determine whether an asymmetric fault is present, with an alternative module computing superimposed positive-sequence impedance for the same element.Filed by HOOSHYAR, ALI (WO2017181268A1, published 2017-10-26).
Highest-citation records in scope
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20110282507A1 | Method and apparatus for adapting at least one set of parameters of an intelligent electronic device | 75 |
| 2 | EP2194656A1 | Electrical power network management system | 44 |
| 3 | US20170054291A1 | Fault protection in converter-based DC distribution systems | 27 |
| 4 | US20180323611A1 | Transient Simulation Modeling for Dynamic Remedial Action Schemes Using Real-Time Protection Setting Updates | 26 |
| 5 | WO2015168830A1 | Fault protection in converter-based DC distribution systems | 25 |
| 6 | US20200350761A1 | Methods, systems, and computer readable media for protecting and controlling a microgrid with a dynamic bound… | 18 |
| 7 | WO2017181268A1 | Methods and apparatus for detecting faults using a negative-sequence directional relay | 18 |
| 8 | US10333301B2 | Transient simulation modeling for dynamic remedial action schemes using real-time protection setting updates | 17 |
| 9 | CN103645416A | 一种基于自适应无功扰动的微电网非破坏性孤岛检测方法 | 16 |
| 10 | US20170040839A1 | Flexible control architecture for microgrid resiliency | 13 |
Citation counts are a signal of influence within this searched corpus, not of current commercial relevance — older records accumulate citations simply by having more time in circulation.
Patent titles are shown in the language they were filed in, not translated, so that each record stays verifiable against the original filing — a translated title will not match in Eureka or in any national register. Each row carries its publication number; clicking a row searches Eureka by that number.
Source: Patsnap Eureka. Citation counts and representative records. Derived from a Patsnap search on Microgrid Protection Coordination covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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What the data means for filing strategy
Three findings that shape where new claims can still land cleanly, and where a filer is walking into dense prior art.
Concentration
63.6%
of 55 records held by top 5 of 49 ranked assignees
A small group already owns most of the claim space
With the top 5 assignees accounting for 35 of the 55 records in scope, and the top 10 reaching 98.2%, this is a field where the ranked leaders have effectively claimed the core protection-scheme territory. A new entrant filing a broad directional-element or setting-group-switching claim is filing into ground the leaders have already covered.
Ranked assignee data, 49 companies
Momentum
-67%
2021 to 2024 filing change
Activity has cooled from its 2021 high
Filings peaked at 6 records in 2021 and fell to 2 by 2024. That drop does not necessarily mean interest has faded — publication lag means 2025-26 filings are still arriving in the record — but it does mean the loudest period of claim-staking in this dataset has already passed.
Filing trend, 2017-2026
Class mix
21.8%
of records touch G01R measurement claims
Measurement and control classes are thinner than protection classes
H02H and H02J each cover roughly half of all records, but G01R, G05B, G05D, G06F and G05F are all filed far less densely. That gap is where algorithmic and measurement-layer claims — rather than pure relay-hardware claims — still have room.
IPC composition, 8 subclasses
Eureka AI Agent
Looking for what nobody has claimed yet?
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to microgrid protection coordination, with the prior art for and against each one.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Microgrid Protection Coordination covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
Players
Who is filing, and where the gaps sit
The assignee ranking is led by a utility-equipment vendor filing well ahead of the field, with a long tail of single- and few-filing entrants behind it.
Leader
12
records held by the top-ranked assignee
One filer sits well clear of the rest
The leading assignee holds 12 of the 55 records in scope, more than double the fifth-place assignee's 4. That gap suggests a filer treating protection coordination as core IP rather than a peripheral filing category.
Assignee ranking, 49 companies
Mid-field
4
records at fifth place
A tight cluster behind the leader
Fifth place sits at 4 records and tenth place at 3, meaning the field flattens quickly after the leader — most of the ranked assignees are filing in single digits, not building deep portfolios.
Assignee ranking, 49 companies
Collaboration
10
co-assignee pairs identified
Co-filing clusters around a small academic group
The strongest co-assignee pairs in this dataset repeat the same individual across three separate pairings, pointing to a small research group filing collaboratively rather than a broad industry co-filing pattern.
Co-assignee pairs, 10 total
Recent-year filing momentum by assignee
| Assignee | Recent year | YoY |
|---|---|---|
| Siemens AG | 0 | — |
| ABB (Switzerland) Ltd | 0 | — |
| ABB Research Ltd | 0 | — |
| S&C Electric Co | 0 | — |
| Schweitzer Engineering Laboratories Inc | 0 | — |
| SOUVIK GANGULI | 0 | — |
| PARAG NIJHAWAN | 0 | — |
| NIRAV KARELIA | 0 | — |
Source: Patsnap Eureka. Assignee-level momentum. Derived from a Patsnap search on Microgrid Protection Coordination covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
What's Next
Where to take this analysis
The dataset points to a field with a clear leader, a cooling filing curve, and thinner coverage in the algorithmic layers sitting above core relay hardware.
Check freedom-to-operate against the leader's portfolio
With one assignee holding 12 of 55 records, any new directional-element or communication-assisted scheme should be checked against that portfolio specifically before drafting claims.
Run an FTO scan in EurekaExplore the measurement-and-control white space
G01R, G05B and G05D together cover a smaller share of records than H02H alone, suggesting room for claims that sit above the relay hardware layer.
Explore white space in EurekaSource: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Microgrid Protection Coordination covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
FAQ
Common questions on microgrid protection patents
The assignee ranking for this dataset covers 49 companies and individuals, and the leader holds 12 of the 55 records in scope, well ahead of fifth place at 4. The top 5 assignees together account for 63.6% of all records, so filing activity is concentrated rather than evenly spread. Anyone assessing competitive position in this space should look closely at that leader's specific claim scope before assuming open ground.
Filings peaked at 6 records in 2021 and had fallen to 2 by 2024, a -67% change over that span. Because patent publication typically lags filing by around 18 months, the 2025 and 2026 figures in this dataset are still incomplete and should not be read as confirmation of a continued slowdown. The honest read is that the field's most active filing period has passed, with the current trajectory still unclear.
H02H (protective circuit arrangements) and H02J (power supply and grid systems) are the two dominant classes, each appearing in roughly half of the 55 records in scope. G01R (electric and magnetic measurement) appears in 21.8% of records, covering the sensing side of adaptive schemes, while G05B and G05D cover the control-logic layer at smaller shares. A given filing typically carries several of these classes at once, which is why the shares add up to more than 100%.
WO2017181268A1, filed by HOOSHYAR, ALI and published in 2017, claims a fault detection and control system that uses negative-sequence impedance calculated from voltage and current data at a directional element to identify asymmetric faults, with an alternative module for superimposed positive-sequence impedance. The claim scope centres on the specific computational method for distinguishing fault types at a directional relay element, not on directional relaying in general. Anyone building a negative-sequence or superimposed-sequence fault detection method should review this filing's independent claims closely.
The clearest gaps sit in the classes with lower filing density relative to the H02H/H02J core: G05B control logic, G06F data processing applied to relay settings, and G05F variable control each cover a small minority of the 55 records. Co-assignee data also shows collaboration concentrated around one small research cluster rather than broad industry partnerships, suggesting room for new collaborative filings outside that group. Algorithmic layers built on top of existing relay hardware — rather than new hardware topologies — appear to be the least crowded route.
Answers are grounded in the same dataset. Derived from a Patsnap search on Microgrid Protection Coordination covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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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.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company's registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.