A Method of Realizing Rapid Frequency Regulation of Units by Controlling Steam Extraction Volume of Steam Turbine
A steam turbine and steam volume technology, which is applied in the direction of reducing/preventing power oscillation, single-grid parallel feeding arrangement, etc., can solve the problems of large fluctuation of load command, large fluctuation of main steam pressure on the engine side, and broken valve stem of regulating valve. , to achieve the effect of small adjustment amount, fast load response and high operation stability
Active Publication Date: 2022-02-11
SHANXI HEPO POWER GENERATION CO LTD
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
After ACE is put into operation, the generator set is required to respond quickly to load changes. However, when the load command fluctuates greatly and the fluctuation frequency is high, in order to ensure that the unit responds quickly to load changes, the turbine command will respond quickly, and the turbine high-voltage adjustment valve fluctuates rapidly. Many power plants have repeatedly occurred. Accident of breakage of steam valve door rod caused by this
At the same time, it is easy to cause large fluctuations in main steam pressure on the machine side, long overshoot time, serious underpressure or overpressure problems
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0014] The boiler combustion rate adjustment mechanism 1 adjusts the combustion intensity of the boiler by adjusting the coal feed rate of the coal feeder, the air volume of the blower fan, and the water supply volume of the feed water pump; The steam turbine is usually equipped with three-stage steam extraction to three high-pressure heaters, and three-stage steam extraction to three low-pressure heaters, so there are six (high) low-pressure heater inlet steam adjustment valves in total; Calculation element 5 calculates the difference between P0 and PE, and sends an electrical signal to the boiler controller and steam turbine controller; the current load issued by the steam turbine generator set is transmitted to the calculation element 5 through the load signal 6; the grid needs load signal 7 to the calculation Element 5. Send the command PC to the steam extraction control, including the control of the opening of the high-pressure heater inlet valve and the low-pressure heat...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A method for realizing rapid frequency regulation of the unit by controlling the steam extraction volume of the steam turbine, the purpose of which is to improve the ability of the steam turbine generator set to adapt to the load change on the network; Control the steam extraction adjustment while issuing instructions to the boiler controller and steam turbine controller, and adjust the high-inlet steam valve and low-inlet steam valve switch through the steam extraction adjustment control command PC, which is controlled by the boiler controller and steam turbine The boiler issues boiler command PB and steam turbine command PT to control boiler combustion adjustment and steam turbine speed regulation valve opening. The three aspects are closed-loop controlled until the actual load PE is equal to the grid load command P0.
Description
technical field [0001] The invention relates to a method for realizing rapid frequency regulation of a unit by controlling the steam extraction volume of a steam turbine. Background technique [0002] In the power system, Automatic Generation Control (AGC) is an important function in the energy management system EMS. AGC is a system that adjusts the active output of multiple generators in different power plants in response to changes in load. Within the specified output adjustment range, the generating set follows the instructions issued by the power dispatching trading organization, and adjusts the power generation output in real time according to a certain adjustment rate, so as to meet the service requirements of the power system frequency and tie-line power control, and ensure the power generation output and load balance. Make sure the system frequency is at the rated value. After the unit unit receives the AGC command, it completes the instantaneous load regulation thr...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24H02J3/48
CPCH02J3/24H02J3/48
Inventor 赵保国王珂贾晓涛
Owner SHANXI HEPO POWER GENERATION CO LTD