Backup power system and method
Granted patent · Canada · publication CA2715358C
Overview
A backup power system that switches between primary power, stored energy, and a secondary power source using a two-threshold control strategy. Conventional systems struggle with intermittent power fluctuations—brief repeated outages drain stored energy without recharge time, while treating all power dips the same way leads to wasteful generator cycling. This system monitors stored energy against two distinct thresholds: one representing the minimum energy needed during generator startup, and a higher one that prevents frequent switching when power fluctuations are minor. The controller only activates the backup generator when energy falls below the startup threshold, distinguishing critical power loss from manageable dips. This approach reduces unnecessary generator cycles and preserves energy reserves, making it particularly suited to modern grids with renewable energy sources and frequent brief interruptions.
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Other jurisdictions claiming the same priority date. Each has its own dossier on this site.
| Publication | Jurisdiction | Kind | Date | Status |
|---|---|---|---|---|
| AU2009212260B2 | Australia | Granted patent | 2008-02-07 | active |
| EP2240993B1 | European Patent Office | Granted patent | 2008-02-07 | active |
| IL207392A | Israel | Granted patent | 2008-02-07 | active |
| JP5303577B2 | Japan | Granted patent | 2008-02-07 | active |
| US20090204838A1 | United States | Published application | 2009-08-13 | expired |
| WO2009100295A2 | WIPO (PCT) | WIPO publication | 2009-08-13 | expired |
| US20100235671A9 | United States | Published application | 2010-09-16 | expired |
| US7962772B2 | United States | Granted patent | 2011-06-14 | active |
| HK1149857B | Hong Kong | Granted patent | 2019-08-09 | active |