Thermal power generating unit distributed coordination control system based on multi-parameter dynamic matrix control

A technology of dynamic matrix control and distributed coordination, applied in the direction of comprehensive factory control, comprehensive factory control, electrical program control, etc., can solve the problems of many variables and complex structures, and achieve reduced fluctuations, high economy and safety, and computing process clear effect

Inactive Publication Date: 2017-12-26
SOUTHEAST UNIV
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  • Application Information

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Problems solved by technology

Aiming at the characteristics of many variables and complex structures of ultra-supercritical units, the present inven

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  • Thermal power generating unit distributed coordination control system based on multi-parameter dynamic matrix control
  • Thermal power generating unit distributed coordination control system based on multi-parameter dynamic matrix control
  • Thermal power generating unit distributed coordination control system based on multi-parameter dynamic matrix control

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Embodiment Construction

[0030] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0031] The present invention aims at the coordinated control of ultra-supercritical units, and it is difficult to obtain ideal control quality by using a simple PID control scheme. The present invention proposes a multi-parameter dynamic matrix prediction method based on the characteristics of large delay in the ultra-supercritical coordinated control process. The distributed coordinated control system of thermal power units controlled by the system can effectively improve the control quality.

[0032] Such as figure 1 Shown is a schematic diagram of a distributed coordinated control system for thermal power units based on multi-parameter dynamic matrix predictive control. The dynamic matrix control system is composed of a load control loop, a main steam pressure control loop and a separator temperature control loop. The input is Fuel volume, s...

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Abstract

The invention discloses a thermal power generating unit distributed coordination control system based on multi-parameter dynamic matrix control. The control system comprises a load control loop, a main steam pressure control loop and a separator temperature control loop, load, main steam pressure and separator temperature as well as deviation of a set value are sent to a prediction controller based on a dynamic matrix control algorithm, optimization values of steam turbine regulating valve opening degree, coal feed and water feed flow are acquired by calculation, and tracking performance of a unit to load instructions and running safety performance of the unit are ensured. The optimization problem of a multi-variable system can be processed conveniently by adopting dynamic matrix control, and the calculation process is clear and simple; during engineering application, programming is convenient to implement; corresponding control quantity is adjusted timely by predicting future output deviation, actual generating power can quickly track the load instructions, stability of the main steam pressure and the separator temperature can be ensured, and the unit is high in stability. The control scheme has control effect better than that of conventional PID control.

Description

technical field [0001] The invention relates to the field of thermal power engineering and automatic control, in particular to a distributed coordinated control system for thermal power units based on multi-parameter dynamic matrix control. Background technique [0002] As the parameters of the unit continue to increase, the complexity of the controlled object and the control requirements have increased, and many problems will arise. In the coordinated control system of ultra-supercritical units, the disturbance of feedwater flow has a great influence on the actual power and main steam pressure of the units. Therefore, in addition to the amount of coal and the opening of the steam turbine valve as the controlled quantities of the coordinated control system, and the main steam pressure and actual power as the controlled quantities of the coordinated control system, the feedwater flow rate should be used as the controlled quantities in the coordinated system. As the controlle...

Claims

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Application Information

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IPC IPC(8): G05B19/418
CPCG05B19/418Y02P90/02
Inventor 吕剑虹蔡戎彧于吉高峥葛浩
Owner SOUTHEAST UNIV
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