Thermal power generating unit coal quantity feed-forward quantization design method based on coordination control qualities

Abstract

The invention discloses a thermal power generating unit coal quantity feed-forward quantization design method based on coordination control qualities. When sliding pressure and deep peak load operation are needed mostly by a large-scale thermal power generating unit at present, a convention coal quantity feed-forward control method is difficult to achieve fast and accurate dynamic follows from an input coal quantity to long time to produce loads. The technical scheme is characterized in that firstly, a deviation is calculated through load commands of speed rates limiting front-and-back, a coal quantity feed-forward quantization scale is obtained through a quantization scale one-dimensional polygonal function, thus basic quantization scales with different bracket load coal quantity feedforward; secondly, coal quantity feed-forward quantization signals with closed-loop control features are designed according to coordination control quality requirements and unit characteristics; finally, the quantization scale one-dimensional polygonal function is used for correcting the coal quantity feed-forward quantization signals. The thermal power generating unit coal quantity feed-forward quantization design method based on the coordination control qualities is capable of ensuring unit energy-saving operation, capable of ensuring the unit coordination control qualities. When the unit is in automatic gain control (AGG) state, coal quantity feed-forward fluctuation ranges are greatly reduced, and stability of the unit is strengthened.

Description

technical field [0001] The invention relates to the coordinated control of thermal power generating units and furnaces, in particular to a feed-forward quantitative design method for coal quantity of thermal generating units based on coordinated control quality. Background technique [0002] Coal feedforward is designed for thermal power units to quickly respond to loads. Most of the current large thermal power units require sliding pressure and deep peak-shaving operation. The feedforward control method is difficult to achieve fast and accurate dynamic follow-up, and the quality of AGC operation is not ideal; at the same time, in the AGC state, the coal volume is too large and frequent fluctuations also affect the stable operation of the coordinated control system. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the above-mentioned defects in the prior art, and provide a feed-forward quantitative design method ...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the above-mentioned defects in the prior art, and provide a feed-forward quantitative design method of thermal power unit coal quantity based on coordinated control quality, so as to solve the problem that the current coordinated control system is difficult to follow quickly and the coal quantity is too large Fluctuation problem, not only to ensure energy-saving operation but also to improve the quality of coordinated control of thermal power units

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