Intelligent sliding pressure curve design method for thermal power units based on coordinated control quality

Abstract

The invention discloses a method for designing sliding pressure curve for a thermal power generating unit on the basis of coordinated control quality. Due to coupling of a coordinated control system, fast and accurate dynamic following is hard to achieve for conventional sliding pressure curve designs and control methods, and AGC (automatic generation control) is poor in operation quality. The method is characterized by including: firstly, designing a shape of the ideal intelligent sliding pressure curve according to the requirement of the thermal power generating unit for coordinated control; and secondly, performing segmental design, including a reference segment, an initial compensation segment and a final compensation segment, according to the ideal shape of the intelligent sliding pressure curve, adding intelligent judgment rules to each segment, performing variable parameter adjustment to allow for constant dynamic adjustment in the whole load variation process, and thereby guaranteeing quality in coordinated control of the thermal power generating unit. By applying the method, energy-saving operation of the thermal power generating unit is guaranteed, quality in coordinate control of the thermal power generating unit is guaranteed, fluctuation range of a closed-loop control circuit is greatly reduced and stability of the thermal power generating unit is enhanced.

Description

technical field [0001] The invention relates to the control field of a thermal power generating set, in particular to a design method for an intelligent sliding pressure curve of a thermal generating set furnace based on coordinated control quality. Background technique [0002] The sliding pressure curve is designed for the energy-saving operation of the unit. Most of the current large-scale thermal power units require sliding pressure and deep peak-shaving operation, which requires both energy-saving operation and the coordinated control quality of the unit. Due to the coupling of the coordinated control system, the conventional sliding pressure curve design It is difficult to achieve fast and accurate dynamic follow-up with the control method, and the quality of AGC operation is not ideal; at the same time, when the load response is accelerated, the main steam pressure will fluctuate sharply, and the phenomenon of overshoot or undershoot is frequent, which affects the coor...

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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 to provide an intelligent sliding pressure curve design method for thermal power generating units based on coordinated control quality, so as to solve the coupling problem of the coordinated control system, which not only ensures energy-saving operation but also improves Unit coordination control quality

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