Integral optimization method and system for automatic power generation system of coal-fired unit

Abstract

The invention provides an integral optimization method and system for an automatic power generation system of a coal-fired unit. The method comprises the steps of carrying out control valve flow characteristic test and adjustment according to control valve flow characteristic parameters, carrying out combustion optimization on a wind and smoke subsystem and a combustion subsystem, carrying out a fuel disturbance test and a control valve disturbance test to generate typical test parameters, using the typical test parameters to generate a dynamic unit model, constructing a coordinating simulation system according to a coordinating controller and the dynamic unit model, using the dynamic unit model to optimize a feedforward controller and carry out simulation verification on the coordinating simulation system simultaneously, carrying out DCS configuration and parameter debugging in the simulation system, carrying out a constant-voltage slide-voltage variable-load test and a constant-load voltage-transformation test to generate technical indexes of the variable-load rate, the variable-load accuracy, variable-load response time and the main steam pressure accuracy, judging whether the technical indexes meet the preset technical indexes, and if on yes judgment, carrying out a slide-voltage variable-load test to enable the coal-fired unit to operate normally.

Description

technical field [0001] The present invention relates to an automatic power generation control technology of a coal-fired unit, in particular to an overall optimization method and system for an automatic power generation control system of a coal-fired unit. Background technique [0002] With the deepening of the reform of the electric power system, the Electricity Regulatory Commission has increased its supervision and regulation of the electric power market. Implementation Rules for the Management of Auxiliary Services (hereinafter referred to as the "two rules"). [0003] The AGC system is mainly used to solve the problem of load following control, and the load control level of the generating set has an important influence on the performance of the AGC (Automatic Generation Control) system. In the existing AGC system, the base point value of the unit controlling the generation according to the BLO method (unit tracking base power curve mode) is determined by the area track...

AI Technical Summary

Problems solved by technology

Under this working condition, the units with unreasonable characteristic parameters of the control gate often show that the load response is too fast and overshoot, or the load response is too slow and undershoot, and the load control accuracy is difficult to guarantee.

At the same time, because the command of the follow-up AGC changes rapidly, the unit with such problems often overshoots quickly and then receives an anti-adjustment command, and then the unit reverses adjustment at a faster speed, which eventually causes the unit to vibrate and adjust, making it difficult to adjust the unit. It is not conducive to the safe operation and economical operation of the unit

[0006] In addition, the existing AGC optimization methods for coal-fired units follow the control ideas before the implementation of the "Two Detailed Rules", and cannot meet the needs of the "Two Detailed Rules" operation. 1.5Pe (rated load) / MIN is enough, the optimization method is single, and the limitations are strong. The optimization of the boiler, steam turbine, air smoke, combustion, steam temperature and other automatic systems of the entire unit is not considered as a whole, and the optimization effect is difficult to adapt to BLR scheduling. The needs of the mode greatly damage the economy and income of the unit

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