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Configuration design method of switching control system

A technology of control system and design method, applied in the control of superheat temperature, lighting and heating equipment, steam superheating, etc., can solve the problems of long adjustment time and poor self-adaptive ability, and achieve the improvement of response, poor self-adaptive ability, Improve the effect of long conditioning time

Inactive Publication Date: 2013-12-18
SUZHOU UNIV
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a configuration design method for a switching control system, using the DCS platform of the industrial production system to carry out modular configuration design, so that the operator can adjust the operation in time, achieve the purpose of reliability and high efficiency, and effectively improve the The problem of poor self-adaptability due to the long adjustment time of conventional PID

Method used

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  • Configuration design method of switching control system
  • Configuration design method of switching control system
  • Configuration design method of switching control system

Examples

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Embodiment 1

[0019] Embodiment one: see figure 1 As shown, a configuration design method of a switching control system, based on the DCS control platform, uses the secondary desuperheater for temperature control. The design value of the inlet temperature, the input of the auxiliary control loop is the outlet temperature of the first-stage superheater desuperheater, the output controls the water spray adjustment valve of the first-stage desuperheater, and the set value of the main control loop of the second-stage desuperheater water spray is the main steam temperature , the input signal of the secondary control loop is the temperature after the secondary spray desuperheater;

[0020] The controller adopts a cascade control system, the main controller adopts a neural network intelligent controller, the secondary controller adopts a PID controller, and the output ends of the main ring PID controller and the neural network intelligent controller are both provided with a tracking module.

Embodiment 2

[0021] Example 2: The coal-fired boiler of #2 furnace 600MW unit of a thermal power plant, the DCS system of this unit retains the secondary loop PID control of the original cascade control, and performs non-disruptive switching between the main loop PID controller and the neural network intelligent controller .

[0022] see figure 2 As shown, the configuration design process of side 1A (side A of the primary desuperheater): when the control system is in the automatic control mode, the secondary loop PID control of the primary desuperheater is retained, and the neural network intelligent controller is used to control the original main loop. Outlet temperature of the 1A side of the loop PID control. In the case of manual operation of the 1A side, the control system always tracks the output of the 1A side and the control value of the first-stage desuperheater in the field operation, so as to avoid large interference and errors when switching to the automatic operation of the 1...

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Abstract

The invention discloses a configuration design method of a switching control system. The configuration design method is based on a DCS (distributed control system) control platform, and includes that a secondary desuperheater is adopted for temperature control, a set value of a main control loop of primary desuperheating water spray is an inlet temperature design value of a secondary superheater, input of an auxiliary control loop is a desuperheater outlet temperature of a primary superheater, a primary desuperheater water spray regulating valve is controlled by the output, a set value of a main control loop of secondary desuperheating water spray is a main steam temperature, and an input signal of an auxiliary control loop is a post temperature of a secondary spray desuperheater; a cascade control system is adopted as a controller, an intelligent neural network controller is adopted as a main controller, a PID (proportion integration differentiation) controller is used as an auxiliary controller, and tracking modules are arranged at output ends of the main loop PID controller and the intelligent neural network controller. The method can allow operators to regulate operation timely to achieve the purposes of reliability and high efficiency, and has great transportability and dynamic expandability, and the problems of long time for conventional PID regulation and poor adaptive capability are effectively solved.

Description

technical field [0001] The invention relates to a design method of a superheated steam temperature control system, in particular to a configuration design method of a superheated control system based on a DCS platform that enables a controller to perform undisturbed switching. Background technique [0002] The superheated steam temperature is one of the important parameters that need to be monitored and controlled during the operation of the power plant unit. It is directly related to the safe and stable operation of the unit. The temperature of superheated steam can generally be regarded as a controlled object with multi-capacity distribution parameters, and its dynamic characteristics can generally be described by multi-capacity inertia links. This object has obvious hysteresis characteristics, so it is difficult to control this object. The main reasons are as follows: (1) The combustion condition of the boiler is unstable, and the flue gas side has frequent and large dist...

Claims

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Application Information

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IPC IPC(8): F22G5/12F22G5/20
Inventor 余雷黄俊何志勇孙立宁李永民钱伟杨刚王蓓
Owner SUZHOU UNIV
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