Marušić, Ante and Lončar, Dražen and Batelić, Jakov and Franković, Valdi (2016) Increasing flexibility of coal power plant by control system modifications. = Increasing flexibility of coal power plant by control system modifications. Thermal science, 20 (4). pp. 1161-1169. ISSN 0354-9836. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. Kvartili JCR: Q3 (2016). Točan broj autora: 4.
|
Text
Increasing flexibility of coal power plant by control system modifications.pdf Jezik dokumenta:English Download (1MB) | Preview |
Abstract
Expanding implementation of intermittent renewable energy sources has already started to change the role of thermal power plants in energy systems across Europe. Traditionally base load plants are now forced to operate as peaking plants. A familiar transition in upcoming years is expected in Croatia and coal power plant operators are preparing accordingly. To evaluate cycling capabilities and control system operation for flexible operation of selected 210 MW coal plant, series of tests with different load gradients were performed and results were thoroughly analyzed. Two possible “bottlenecks” are identified, thermal stress in superheater header, and achievable ramping rate considering operational limitations of coal feeders, firing system and evaporator dynamics. Several unexpected readings were observed, usually caused by malfunctioning sensors and equipment, resulting in unexpected oscillations of superheated steam temperature. Based on superheater geometry and experimental data, maximal steam temperature gradient during ramping was evaluated. Since thermal stress was well inside the safety margins, the simulation model of the whole boiler was used to evaluate achievable ramping on electric side.
| Item Type: | Article (["eprint_fieldopt_article_type_article" not defined]) |
|---|---|
| Keywords (Croatian): | coal powered plants; flexible generation; thermal stress; simulation |
| Subjects: | TECHNICAL SCIENCE > Mechanical Engineering |
| Divisions: | 500 Department of Energy, Power Engineering and Environment > 510 Power Engineering and Energy Management Chair |
| Indexed in Web of Science: | Yes |
| Indexed in Current Contents: | No |
| Quartiles: | Q3 (2016) |
| Citations SCOPUS: | 0 (12.09.2017.) |
| Date Deposited: | 23 Feb 2017 10:20 |
| Last Modified: | 01 Mar 2018 12:48 |
| URI: | http://repozitorij.fsb.hr/id/eprint/7357 |
Actions (login required)
 |
View Item |
Download Statistics
Download Statistics