Green Energy
- Boiler (master Fuel Trip)
Steam Generator ( boiler ) is very important equipment at thermal power units , Boiler is the steam supply for the unit to rotate the turbine's rotor , hence produce electricity at Generator's stator. Boiler usually equipped with solar and Main...
- Advanced Process Controller (apc) For Controlling Steam Power Plant {part 2}.
Advantages of an Advanced Process Controller Figure 5 The APC-based unit control concept for main steam pressure control Figure 5 can be differentiated from the conventional unit control approach in several important ways: The APC is able...
- Advanced Process Controller (apc) For Controlling Steam Power Plant {part 1}.
"Control of Steam Power Plant is very big job need Care to fulfill the appropriate degree of stability and dependability for such this big system " In many countries, plants have to fulfill specific requirements of the electrical grid (such as frequency...
- Discussion About Previous Post (over Frquency Happened At A Windy Winter Night)
After I discussed what happened the outage three days ago - the situation I posted previously - I found an explanation for that: - In winter days , Electrical loads are decreasing here in Egypt especially at night , therefore the frequency increases...
- Over Frquency Happened At A Windy Winter Night..
SUNDAY, DECEMBER 12, 2010 “ at 3:00 am , A sudden frequency fluctuation happened , that cause the MW output fluctuate with the grid frequency , Unit 7 was at Coordinated Mode ( Boiler Master – Auto , Turbine Set – Auto ) , The load fluctuated...
Green Energy
{ BOILER AND TURBINE } CONTROL MODES
Boiler Master (Firing Rate Demand)
Boiler Master (basic firing rate demand) computation is dependent on the Current operating mode like
Coordinated mode,
Boiler Follow mode,
Turbine Follow mode,
Manual mode.
This demand is transmitted in parallel to the fuel and air control sub -loops.
(1) Unit Startup
During the unit startup, Boiler Master is determined as a fixed demand with the rate to obtain the optimum boiler steam temperature rising and steam flow until HP turbine bypass control valve is fully closed. This demand will be adjusted manually or automatically according to the unit startup mode.
During this period, Main steam pressure is controlled by HP turbine bypass control valve. During the unit start up, the operating mode will be Manual Mode both Turbine governor and Boiler Master manual.
(2) Normal operation
After HP turbine bypass control valve is fully closed, the operating mode will be normally transferred to Coordinated Control Mode.
In case of Coordinated Control Mode, the turbine governor controls MW and Boiler Master controls the main steam pressure.
In case of Boiler Follow Mode, Boiler Master also controls the main steam pressure.
In case of Boiler Master Manual or load runback, the operating mode becomes Turbine Follow Mode and turbine governor controls the main steam pressure.
- Boiler (master Fuel Trip)
Steam Generator ( boiler ) is very important equipment at thermal power units , Boiler is the steam supply for the unit to rotate the turbine's rotor , hence produce electricity at Generator's stator. Boiler usually equipped with solar and Main...
- Advanced Process Controller (apc) For Controlling Steam Power Plant {part 2}.
Advantages of an Advanced Process Controller Figure 5 The APC-based unit control concept for main steam pressure control Figure 5 can be differentiated from the conventional unit control approach in several important ways: The APC is able...
- Advanced Process Controller (apc) For Controlling Steam Power Plant {part 1}.
"Control of Steam Power Plant is very big job need Care to fulfill the appropriate degree of stability and dependability for such this big system " In many countries, plants have to fulfill specific requirements of the electrical grid (such as frequency...
- Discussion About Previous Post (over Frquency Happened At A Windy Winter Night)
After I discussed what happened the outage three days ago - the situation I posted previously - I found an explanation for that: - In winter days , Electrical loads are decreasing here in Egypt especially at night , therefore the frequency increases...
- Over Frquency Happened At A Windy Winter Night..
SUNDAY, DECEMBER 12, 2010 “ at 3:00 am , A sudden frequency fluctuation happened , that cause the MW output fluctuate with the grid frequency , Unit 7 was at Coordinated Mode ( Boiler Master – Auto , Turbine Set – Auto ) , The load fluctuated...