Main steam pressure change-based thermal power generating unit load control method

A technology of main steam pressure and thermal power unit, which is applied in the direction of mechanical equipment, engine components, engine starting, etc. It can solve the problems of large adjustment, insufficient load response range, and difficulty in taking into account the ability of load peak regulation and frequency regulation, etc., to ensure rapidity and Accuracy, meeting the needs of FM peak shaving, and the effect of improving FM capability

Active Publication Date: 2012-10-24
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: how to solve the problem that the load response range is not enough or the adjustment is too large, and it is difficult to take into account the peak-shaving and frequency-regulating capabilities of the entire load range under the change of the main steam pressure in actual opera

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  • Main steam pressure change-based thermal power generating unit load control method
  • Main steam pressure change-based thermal power generating unit load control method

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Specific embodiment 1

[0034]At present, power grids in some areas of my country require that grid-connected generating units must have the primary frequency regulation function, and thermal power units of 200MW and above should have the AGC function. The primary frequency regulation and AGC operation have been included in the daily assessment.

[0035] The test of the selected unit was carried out under the CCS+DEH mode, and the scheme proposed in this paper was adopted. The test object is a subcritical unit with a rated output of 330MW, high and medium pressure combined cylinders, intermediate reheating double-cylinder double-exhaust condensing steam turbines, and the rated pressure of the unit design is 16.5Mpa.

[0036] The main control output value of the steam turbine of this unit is per unit value (0~100%), the range of the given load of the unit and the actual power value of the unit is 0~330MW, and the test records are as follows:

[0037] (1) Ratio feed-forward of t...

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Abstract

The invention discloses a main steam pressure change-based thermal power generating unit load control method, which comprises the following specific implementation steps of: (1) taking unit given load as pure proportional steam turbine master control proportion feed-forward input quantity through a proportional component; (2) taking the unit given load as steam turbine master control differential feed-forward input quantity; and (3) summing unit given load dynamic results generated by the step (1) and the step (2) through the proportional element and a differential element respectively and providing to the steam turbine master control PID (Proportion Integration Differentiation) regulating step as feed-forward FF input quantity. The main steam pressure change-based thermal power generating unit load control method has the beneficial effects that the control problems of quick response and the like when the thermal power generating unit is put in the AGC (Automatic Generation Control) mode can be solved through implementation, the requirement of a power grid on the unit AGC can be effectively met, and the requirements of frequency modulation and peak regulation are met.

Description

technical field [0001] The invention relates to a thermal power unit load control method adapted to a smart grid, in particular to a thermal power unit load control method based on changes in main steam pressure. Background technique [0002] With new energy connected to the grid, load growth and the scale of the grid continue to increase, under the new situation of the interconnection of the UHV grid and the regional grid, the connection between the grids at all levels is becoming increasingly close, and the requirements for coordination and cooperation between the grid and the unit are also increasing. higher. Thermal power units, as the main means of peak regulation and frequency regulation, have increasing requirements for load control. For example, the primary frequency regulation function of generator sets is mainly through adjusting the steam inlet control door of the DEH system, using boiler heat storage, and in the event of an abnormality in the power grid, quickly ...

Claims

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Application Information

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IPC IPC(8): F01D19/00
Inventor 李军
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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