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Feedforward control with intermittent reinitialization based on estimated state information

A feed-forward control and controller technology, applied in general control systems, program control, comprehensive factory control, etc., can solve the problems of not providing guaranteed dynamic accuracy, not considering the current state, etc.

Active Publication Date: 2021-06-29
EMERSON PROCESS MANAGEMENT POWER & WATER SOLUTIONS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The immediate drawback of using the current feed-forward approach arises due to the use of a steady-state load demand curve that does not provide guaranteed dynamic accuracy
In addition, when the load target changes in the middle of the load ramp process, the current state is not considered in the subsequent calculations

Method used

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  • Feedforward control with intermittent reinitialization based on estimated state information
  • Feedforward control with intermittent reinitialization based on estimated state information
  • Feedforward control with intermittent reinitialization based on estimated state information

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Embodiment Construction

[0032] Referring now to the accompanying drawings, figure 1 A block diagram is shown of a once-through boiler steam cycle that may be used for example in a typical boiler 100 in a thermal power plant. Boiler 100 may include various sections through which steam or water flows in various forms (eg, superheated steam, reheated steam, etc.). Boiler 100 comprises: main control equipment 103 for regulating fuel input, furnace and main water wall absorption section 102 , main superheater absorption section 104 , superheater absorption section 106 and reheater section 108 . Additionally, boiler 100 may include one or more desuperheater or sparger sections 110 and 112 and an economizer section 114 . During operation, main steam generated by boiler 100 and output by superheater section 106 is used to drive high pressure (HP) turbine 116 and reheated hot steam from reheater section 108 is used to drive intermediate pressure ( IP) Turbine 118. The turbine main valve 115 is responsible ...

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Abstract

An optimal feed-forward control design for controlling a device performs intermittent re-initialization based on estimated state information. Model-based constrained optimization is explicitly performed during feed-forward computation. During the course of operation of the device, state estimation is performed continuously. When a load target change is detected, the estimated state can be used as a new signal reference.

Description

technical field [0001] Generally, the present disclosure relates to the control of process plants and power generating plants, and more particularly, to implementing a variable rate feedforward control circuit for use with varying load demand set point signals. Background technique [0002] Several industrial and non-industrial applications use multi-component power generation equipment. Industrial plants, such as power plants, may include boiler-turbine units in which fuel-fired boilers generate thermal energy, such as steam, to operate one or more steam turbines, which in turn generate electricity. In these systems, one control objective is to adjust power output to meet demand while maintaining steam pressure and temperature within desired ranges. [0003] A typical steam power generation system used in a power plant includes a boiler with a superheater section (with one or more subsections) in which steam is produced and then supplied to a first (usually high pressure) ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/418
CPCG05B19/41865G05B19/41885F01K13/02G06F1/3206G06F1/3287G06F1/3296Y02P90/02
Inventor X·程R·W·克法尔特S·J·席林
Owner EMERSON PROCESS MANAGEMENT POWER & WATER SOLUTIONS