Main steam temperature control system and method for thermal power plant based on event-triggered mechanism

Abstract

The invention discloses a main steam temperature control system and method for a heat-engine plant based on an event-triggered mechanism. The control system comprises an outer ring prediction control loop and an inner ring PID control loop, wherein the inner ring PID control loop comprises an auxiliary detecting transducer, an auxiliary controller, an actuator and an attemperator, which are connected with one another in sequence; the outer ring prediction control loop comprises a main steam temperature object, a main detecting transducer, a main controller and the whole inner ring PID control loop, which are connected with one another in sequence; the main controller comprises a reference trajectory introducer, an online corrector, an event trigger, a predicting model device, a comparator and an optimization calculator; the event trigger can screen input signals and determine whether the control signal at the current moment can be sent to the actuator or not according to judgment on event triggering conditions. The main steam temperature control system disclosed by the invention is based on the event-triggered mechanism and only sends signals meeting the conditions without affecting the system stability, so as to reduce the network transmission pressure and prolong the system life.

Description

technical field [0001] The invention belongs to the technical field of thermal power plant control, in particular to a thermal power plant main steam temperature control system and method based on an event trigger mechanism. Background technique [0002] Since the reform and opening up, the economy has developed rapidly, but it has also brought about increasingly serious problems of environmental pollution and energy consumption. Among them, the power industry is particularly serious, especially the continuous construction of large-capacity generator sets, and it has become an urgent need to improve operating efficiency and economy. Thermal power generation refers to the general term for using the thermal energy generated by the combustion of coal and other fuels to heat water, turning the water into high-temperature, high-pressure water vapor, and then driving the generator to generate electricity by the water vapor. Coal mill, coal mill, primary fan and DCS control system...

AI Technical Summary

Problems solved by technology

Compared with conventional PI control, the setting range of control parameters of fractional PI control is larger, the controller can control the controlled object more flexibly, and the control effect is better. However, it has not been found that the traditional thermal power plant main steam temperature PID control method, predictive control Literature and reports on the application of the method integrating event triggering mechanism and main steam temperature control in thermal power plant boilers

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