Double-layer control system for load tracking for supercritical thermal power unit turbine-boiler system

A technology for thermal power units and system load, applied in general control systems, adaptive control, control/regulation systems, etc., can solve problems such as poor optimal trajectory tracking effect, and achieve the effect of reducing design difficulty and good load tracking performance

Active Publication Date: 2017-06-16
SOUTHEAST UNIV
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Problems solved by technology

The problem with this design method is that traditional lower-level disturbance eliminators often use MPC or PID algorithms. These algorithms are sensi

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  • Double-layer control system for load tracking for supercritical thermal power unit turbine-boiler system
  • Double-layer control system for load tracking for supercritical thermal power unit turbine-boiler system
  • Double-layer control system for load tracking for supercritical thermal power unit turbine-boiler system

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Embodiment Construction

[0057] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0058] like figure 2 and image 3 As shown, it is a block diagram of the control system implementation scheme of the present invention, wherein the economical linear predictive controller adopts a linearized model of the machine furnace system, and optimizes the optimal tracking of the machine furnace system according to the actual economic requirements of the machine furnace system. trajectory; the lower layer L1 adaptive controller consists of a state predictor, adaptive law and compensation control law. According to the linear model of the machine furnace system, the state predictor is designed, and the adaptive law is designed. According to the difference between the output state of the state predictor and the measured s...

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Abstract

The invention discloses a double-layer control system for load tracking for a supercritical thermal power unit turbine-boiler system. The double-layer control system comprises an upper-layer controller and a lower-layer controller, and is characterized in that the upper-layer controller is an economic linear model predictive controller (ELMPC), the lower-layer controller is an L1 adaptive controller; the ELMPC builds a local linearized model with disturbing items of the turbine-boiler system, plans an optimal state and an output track of the system in a future period of time by taking the optimal economy in the future period of time as a target, acquires a corresponding optimal control variable, and transmits the optimal control variable, the corresponding optimal state of the system and the output track to the lower-layer controller; and the lower-layer controller is an L1 adaptive controller, and the L1 adaptive controller adds an adaptive correction value on the basis of the control variable planned by the upper-layer controller according to the optimal state and the output track which are transmitted by the upper-layer controller and an actual unit state and an output measurement value so as to be used for updating a prediction model of the upper layer.

Description

technical field [0001] The invention belongs to the field of thermal power engineering and automatic control, and relates to a coordinated control method for a supercritical thermal power unit, in particular to a double-layered coordinating supercritical thermal power unit which adopts economical predictive control and L1 self-adaptive control. Control System. Background technique [0002] Coordinated control of thermal power units refers to comprehensive control of boilers and steam turbines as a whole to meet the requirements of the power grid for load tracking of thermal power units. Compared with subcritical thermal power units, the coordinated control of supercritical thermal power units is mainly different in that supercritical units can only use once-through boilers because the parameters of working medium water exceed the critical parameters of water. Since the once-through boiler does not have the energy-working medium buffer link of the steam drum, the energy-work...

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 韩四维沈炯潘蕾
Owner SOUTHEAST UNIV
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