Decoupling Compensation Control Method for Coordinated Control of Unit Generators and Main Control System

Abstract

The invention discloses a unit coordinated control master control system decoupling compensation control method. According to the method, data are acquired by utilizing a unit onsite coal feed rate step test and a steam turbine high pressure regulating valve step test. A boiler master control decoupling compensation transfer function model is established through a genetic identification algorithm. Meanwhile, a boiler master control compensation simplification model is established and coupled in boiler master control by utilizing decoupling compensation model inference so as to overcome the high delay and high inertia properties of a unit boiler master control system. Compared with the conventional cascade control method, main team pressure compensation regulation can be more rapidly performed by the control method without generating fluctuation of a high pressure regulating valve so that safer and more economical and energy-saving operation of the unit can be realized.

Description

Technical field: [0001] The invention relates to the field of coordinated control of coal-fired power plant units, in particular to a decoupling compensation control method for a unit unit coordinated control main control system. Background technique: [0002] my country's power supply pattern dominated by coal-fired power stations will not change fundamentally for a long time in the future, and the power generation method of unit units has occupied an absolute dominant position. The object of the unit control system is a typical complex thermal system with strong coupling, nonlinearity, large inertia, time-varying parameters and uncertain factors. It has multiple control variables and controlled variables, with complex control objectives and corresponding complex control tasks. [0003] Especially in recent years, as the grid AGC scheduling and assessment requirements have become more and more stringent, most unit units will choose to use the steam turbine to control the u...

AI Technical Summary

Problems solved by technology

From the perspective of the entire control system, when the opening of the turbine high-pressure valve remains unchanged, the amount of coal fed affects the main steam pressure of the boiler on the one hand, and the air intake of the turbine on the other hand, which in turn affects the load of the unit; while the amount of coal fed to the unit When it remains unchanged, the change of the opening of the high-pressure valve of the steam turbine affects the air intake of the steam turbine on the one hand, and then affects the load of the unit. On the other hand, the opening / decrease of the high-pressure valve will inevitably affect the main steam pressure

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