Method for controlling coal supply quantity during transient load-varying process considering exergy storage correction of boiler system of coal-fired unit
US11204162B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2019 |
| Grant date | Dec 21, 2021 |
| Priority date | — |
| Expiry date | Jun 22, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/2639
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method for controlling a coal supply quantity during a transient load-varying process considering exergy storage correction of a boiler system of a coal-fired unit is provided. Temperatures and pressures of working fluid and metal heating surface of the boiler system of the coal-fired unit are measured and recorded in real-time, and converted into the exergy storage amount at different operating load points. During the transient operation process, the real-time exergy storage amount of the boiler system is compared with the exergy storage amount at the corresponding steady-state load point, and the real-time exergy storage variation is obtained; thereafter, the feed-forward control signal of coal supply quantity input is superposed to the existing coal supply quantity command of the boiler system, and the coal supply quantity signal of the boiler system based on the exergy storage correction is finally generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.