Advanced process control optimizing system of thermal power unit

Abstract

The invention provides an advanced process control optimizing system of a thermal power unit. The advanced process control optimizing system comprises a DCS (distributed control system) and an OPC (object linking and embedding for process control) server, and is characterized by also comprising an advanced control system adopting a predication control technology, wherein the advanced control system is communicated with the DCS through the OPC server, and comprises a modeling engine, an optimizing engine, a database and OPC communication service. The advanced process control optimizing system has the advantages that unit operation process control parameters are subjected to all-operating-condition self-adaptation real-time correction by various technologies such as predication control, self-adaptation control, coordination control, decoupling control and model distinguishing, the work state of a loop can also be monitored in real time, and in addition, statistical data and operation analysis reports are automatically generated, so the regulation quality of an automatic control system is improved, meanwhile, an independent hardware platform is adopted, and the debugging efficiency, the safety, the reliability and the updating capability are obviously improved.

Description

technical field [0001] The invention relates to the technical field of power plant control, in particular to an advanced process control optimization system for a thermal power unit. Background technique [0002] At present, the conventional coordinated control of thermal power units generally adopts the adjustment method of load command feedforward + proportional integration differentiation (PID) feedback. As the operating conditions of the unit change, the dynamic characteristics of the controlled object of the unit become relatively poor , the hysteresis and inertia of the process also become larger, and the nonlinear and time-varying characteristics of the system become more and more significant, resulting in low load response rate, large fluctuation range of key parameters, long overheating time of main steam temperature, large The problem of lagging and long debugging cycle of optimization work. It can be seen that the conventional adjustment method of load command fe...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an advanced process control optimization system for thermal power units to solve the problems of low load response rate, large fluctuation range of key parameters, too long main steam temperature overheating time, large lag and The problem of long debugging cycle for optimization work

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