H02J 3/11
Arrangements for adjusting frequency in ac networks
Official title: Arrangements for adjusting frequency in AC networks, e.g. by control of active power
H02J3/11 (Arrangements for adjusting frequency in ac networks) appears on 54 US grants and 55 published applications in this corpus.
Search patents in H02J- Granted patents
- 54
- Published applications
- 55
- Assignees
- 50
- Inventors
- 155
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 5 |
| 2004 | 1 | 2 |
| 2005 | 4 | 1 |
| 2006 | 2 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 1 | 1 |
| 2012 | 0 | 1 |
| 2013 | 0 | 2 |
| 2014 | 0 | 7 |
| 2015 | 3 | 5 |
| 2016 | 4 | 7 |
| 2017 | 5 | 4 |
| 2018 | 6 | 1 |
| 2019 | 3 | 2 |
| 2020 | 6 | 1 |
| 2021 | 2 | 0 |
| 2022 | 1 | 0 |
| 2023 | 2 | 2 |
| 2024 | 4 | 1 |
| 2025 | 4 | 2 |
| 2026 | 1 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Grid forming control of grid connected power converter9 Jul 2026US 2026/0196830 A1Vestas Wind Systems A/S
- Method and system for controlling electronic converters25 Jun 2026US 2026/0180335 A1Ingeteam Power Technology, S.A.
Most cited
By later US patents
- Electrical power distribution monitoring system and method161US 5,963,457 AHitachi, Ltd. · 1999
- Electrical power distribution monitoring system and method74US 6,061,609 AHitachi, Ltd. · 2000
- Configuration of a part of an electrical power distribution network42US 6,885,915 B2ABB Research Ltd. · 2005
- Method and apparatus for delivering power to semiconductors31US 10,158,357 B1VLT, Inc. · 2018
- System for aiding the preparation of operation and maintenance plans for a power generation installation30US 6,853,930 B2Hitachi, Ltd. · 2005