Once-through steam generator steam pressure fuzzy ¿CPID control apparatus and control method

Abstract

The invention provides a fuzzy-PID control device for steam pressure of a once-through steam generator and a coordinated control method. A fuzzy-PID controller is a core part of the fuzzy control device for steam pressure of the once-through steam generator, comprising a fuzzy-controller and a PID-controller, and smooth transition of the two controls can be guaranteed by adopting fuzzy switching. With the implementation of an excellent stability of the PID controller and a good rapidity of the fuzzy controller, when the deviation is larger, a proper action can be provided rapidly by means of the characteristic of human-simulated intelligent control so as to suppress interference rapidly and smoothly, thereby guaranteeing the rapidity and robustness of dynamic response of the system; when the deviation is smaller, a conventional PID plays the leading role to guarantee the excellent steady-state performance. The fuzzy-PID control device is applicable to the system with serious non-linearity and time variance, such as the once-through steam generator, and has high control precision and good robustness. The fuzzy-PID control device can be practically applied to the design of the control system of the once-through steam generator so as to improve the control quality of the system.

Description

technical field [0001] The invention relates to a control device for the steam pressure of a direct current steam generator, and also relates to a control method for the steam pressure of a direct current steam generator, in particular to a fuzzy-PID control device and control device for the steam pressure of a direct current steam generator based on fuzzy switching. method. Background technique [0002] The steam generator is a key piece of equipment in a pressurized water reactor, providing cooling to the reactor and generating steam for the steam turbine to do work. In the current design, the once-through steam generator is mostly used. It does not need to install a steam-water separator, the structure is simple, the static characteristics are good, and the maneuvering performance is also good; because the superheated steam is generated, a dehumidification device can not be installed between the high and low cylinders of the steam turbine, which simplifies the system and...

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Problems solved by technology

[0004] After searching the existing technical literature, it is found that Zhang Guifeng's sliding mode fuzzy control of the once-through steam generator is the current research on the control method of the once-through steam generator. The switching curve of variable structure control, in the actual process, this curve is difficult to obtain, which will affect its control effect

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