Integrated Energy System Patents: Top Companies & Filing Trends 2026
- A flattening curve. filings peaked at 38 in 2023 and eased to 30 by 2022's midpoint mark, suggesting the field is past its steepest growth phase rather than still accelerating.
- Concentrated, not locked up. the top 5 assignees hold 30.8% of all 182 records and the top 10 hold 46.7% — real concentration, but well short of a closed field.
- Almost entirely a China filing story. 181 of 182 records were filed at China's receiving office against a single PCT filing, which matters for where freedom-to-operate actually needs checking.
What this patent landscape covers
Integrated energy systems combine electricity, heat and gas networks under a single planning and dispatch layer, using co-optimization across carriers to size storage, value flexibility and plan capacity. This landscape tracks 182 published records filed between 2015 and the 2026 data cut-off, indexed under IPC classes spanning power grid systems, digital data processing and business-process modelling. Publication typically lags filing by around 18 months, so the most recent filing year in any trend understates real activity.
The dataset is dominated by planning-and-dispatch software claims rather than hardware, reflected in the heavy weighting toward data-processing and business-method IPC classes over domestic heating or refrigeration classes. That skew shapes where freedom-to-operate risk actually sits: mostly in optimization and sizing methodology, not equipment design.
Filing trend and technology composition
Two views of the same 182-record dataset: the filing trend by year, and the IPC subclasses those records fall under.
Filing trend, 2017–2026
Filings rose from a single record in 2017 to a peak of 38 in 2023, then eased toward the 2022 midpoint level of 30 — a flat-to-declining pattern rather than continued acceleration. The 2026 figure of 2 is a partial year and should not be read as a collapse.
IPC subclass composition
G06Q (business, commerce and admin data processing) covers 96.7% of the 182 records, with G06F (electric digital data processing) at 39.6% and H02J (power supply and grid systems) at 29.1%. Hardware-adjacent classes — F24D domestic heating and F25B refrigeration/heat pumps — each sit at just 1.1%, showing the claim activity is concentrated in planning and dispatch methods rather than physical equipment.
Shares are the percentage of the 182 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Integrated Energy Systems and Multi-Energy Complementarity with Eureka
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Try EurekaMost-cited records in this landscape
Equipment selection method for an energy interconnection system (WO2023134254A1)
The filing describes a bi-level planning method for integrated energy systems: an upper-level model weighs equipment investment cost and operating constraints, while a lower-level model evaluates operating returns, supply reliability and carbon emissions. The two levels feed each other to output an overall system plan, factoring in reliability cost calculated from unserved load and a per-unit penalty, and explicitly accounting for carbon-reduction effects during planning.Filed by Electric Power Research Institute of Yunnan Power Grid Co., Ltd, dated 2023-07-20. It is the most-cited record in this dataset, cited 54 times.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | WO2023134254A1 | 一种能源互联系统的设备选型方法 | 54 |
| 2 | CN108694483A | 考虑电热气耦合的综合能源系统设备选型及容量规划方法 | 42 |
| 3 | CN109255471A | 一种含风电的电-气-热综合能源系统扩展规划优化方法 | 40 |
| 4 | CN113762708A | 一种考虑多目标协同的园区级综合能源系统规划方法 | 34 |
| 5 | CN105939029A | 综合能源系统规划方案获取方法和系统 | 28 |
| 6 | CN112365021A | 一种基于混合储能的区域综合能源系统规划优化方法 | 25 |
| 7 | CN113722895A | 一种基于多站融合的综合能源系统优化配置方法 | 22 |
| 8 | CN111404153A | 计及可再生能源与需求响应的能量枢纽规划模型构建方法 | 19 |
| 9 | CN114565319A | 基于多能源网络布局的综合能源系统协同规划方法 | 18 |
| 10 | CN113673738A | 基于供需响应与可调场景的综合能源系统优化配置方法 | 18 |
Citation counts inside a searched corpus favour older records; treat them as a signal of influence within this dataset, not of current technical importance.
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.
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Three read-outs from the concentration, technology-class and geographic figures above.
Leadership is real but not exclusionary
With the leader holding 16 records and tenth place holding 5, the ranking has a sharp head and a long tail across the 100 ranked companies. That combination — meaningful concentration at the top without a monopoly — means new entrants can still stake claims in adjacent sizing or dispatch methods.
This is a software-methods field first
The near-universal presence of G06Q alongside G06F at 39.6% confirms that patent activity centres on planning, dispatch and business-process claims rather than on the domestic heating or refrigeration hardware that physically delivers multi-energy supply — those classes sit at 1.1% each.
Recent-year momentum has stalled across the leaders
Every one of the six most closely tracked assignees recorded zero filings in the latest year, a uniform -100% year-on-year drop. Read together with the 2023 peak of 38 filings, this points to a filing pause rather than a shift of activity to a new leader.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to integrated energy systems and multi-energy complementarity, with the prior art for and against each one.
The assignee landscape
182 records map to 100 ranked assignees, led by a state grid entity with 16 records; the field then thins quickly, with fifth place at 7 and tenth place at 5 records.
A state-grid entity leads by a wide margin
The top assignee's 16 records are more than double the fifth-place count of 7, and the ten strongest co-assignee pairings in the dataset also cluster around state grid subsidiaries and their economic-technical research institutes, pointing to internally networked filing programmes rather than isolated inventors.
Universities and provincial utilities fill out the tail
Below the leading cluster, the ranking includes multiple electric power universities and provincial grid companies, each holding a handful of records. This is typical of a field still being explored through applied research programmes rather than one dominated by a single commercial product line.
Filing activity is almost entirely domestic
Only one record in the dataset went through the WIPO PCT route, against 181 filed directly in China. Freedom-to-operate checks for this field should be weighted heavily toward Chinese filings rather than international counterparts.
| Assignee | Recent year | YoY |
|---|---|---|
| State Grid Corporation of China | 0 | -100% |
| North China Electric Power University | 0 | -100% |
| Southeast University | 0 | -100% |
| Zhejiang University | 0 | -100% |
| Hohai University | 0 | -100% |
| Shanghai Jiao Tong University | 0 | -100% |
| Guangdong Power Grid Co., Ltd. | 0 | -100% |
| State Grid Shanghai Municipal Electric Power Company | 0 | — |
Where to take this analysis
The figures above establish where filing activity sits today; the next step is usually narrower and specific to a claim or a competitor.
Check freedom-to-operate against the cited leaders
The most-cited records in this dataset, several tied to equipment selection and capacity-planning methods, define the claim territory most likely to matter for a new filing.
Explore citing records in EurekaTrack the leading assignees for renewed filing
Every top-6 tracked assignee shows zero filings in the latest year; a resumed programme from any of them would be an early signal worth monitoring.
Set up assignee monitoring in EurekaTest claim language in the under-claimed branches
Heat-pump integration and electrolytic hydrogen coupling carry very few filings relative to the core dispatch cluster, leaving room for a first-mover claim.
Draft and search claims in EurekaCommon questions on this landscape
The field is led by a state grid entity holding 16 of the 182 records in this dataset, roughly double the count held by the fifth-ranked assignee at 7 records. Beyond the leading names, filing activity spreads across a long tail of 100 ranked companies, including several electric power universities and provincial grid subsidiaries, each contributing a handful of records. The top 5 assignees together account for 30.8% of all records, and the top 10 for 46.7%, indicating real but not exclusionary concentration.
Filings grew from a single record in 2017 to a peak of 38 in 2023, but the 2022 midpoint figure of 30 shows the growth curve had already begun to flatten before the peak. The most recent tracked year shows just 2 filings, though that figure is a partial year and understates real activity because publication typically lags filing by about 18 months. Taken together with the fact that every closely tracked top assignee shows a -100% year-on-year drop to zero filings, the field looks to be in a filing pause rather than continued expansion.
Almost all records — 96.7% of the 182 in scope — carry the G06Q business-process and data-processing IPC class, with G06F electric digital data processing close behind at 39.6% and H02J power grid systems at 29.1%. Hardware-adjacent classes like F24D domestic heating and F25B refrigeration or heat pumps each cover only 1.1% of records. This means the bulk of patent activity in integrated energy systems is about planning, dispatch and optimization methods, not the physical equipment that delivers multi-energy supply.
The clearest gaps sit in the physical-equipment classes that barely register in this dataset: domestic heating integration, heat pumps, and electrolytic hydrogen coupling to system planning each account for around 1% or less of the 182 records, against a field otherwise saturated with dispatch and business-process claims. Cross-carrier storage sizing under explicit uncertainty modelling and carbon-aware flexibility valuation are similarly thin. A first claim in any of these branches would face far less prior art than one filed in the core equipment-selection or capacity-planning space.
It is overwhelmingly a China filing story: 181 of the 182 records in scope were filed at China's receiving office, against a single PCT filing through WIPO. Anyone assessing freedom-to-operate or competitive risk in this space should weight Chinese-language filings and Chinese assignees heavily rather than assuming international patent databases outside China will surface the relevant prior art. This concentration also means English-language patent literature substantially understates real filing activity in the field.
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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.