Phase change electric heat storage heating system with working-condition-based PID and self-adaptive feedforward compensation and method

Abstract

The invention discloses a phase change electric heat storage heating system with working-condition-based PID and self-adaptive feedforward compensation and a method. The system includes a wind circulation system and a water circulation system, and the water circulation system and the wind circulation system exchange heat through a heat exchanger, and output heating hot water. The wind circulationsystem includes a frequency conversion fan (1), a lower air duct (3), a phase change regenerative furnace (4) and an upper air duct (5). A working-condition-based PID and self-adaptive feedforward compensation control strategy can control the phase change electric phase change heating system according to the working conditions of the system, the problem that when the heating system working conditions are changed, traditional single closed-loop control is difficult to adapt to dramatic changes in system parameters is solved, and the feedforward compensation can quickly suppress deviation causedby furnace temperature disturbance. When adopting the working-condition-based PID and self-adaptive feedforward compensation control strategy, a water supply temperature fluctuation range is small, and the problem that the heating control stability of the phase change heat storage heating system is not high is solved.

Description

technical field [0001] The invention relates to the technical field of automation, in particular to a control method for a phase-change electric thermal storage heating system based on PID+adaptive feed-forward compensation according to working conditions. Background technique [0002] In order to solve the current problems of air pollution and smog, the central and local governments have issued policies to ban small coal-fired boilers, and require the power supply bureaus of all provinces and cities across the country to provide industrial, commercial and ordinary residents from 23:00 to 6:00 the next morning. 50% discount electricity price to encourage nighttime power consumption, thereby improving the economic benefits of power supply departments in various regions. It is obvious that the gradual implementation of preferential nighttime electricity price nationwide has become the general trend. Therefore, the use of nighttime valley electricity for heating has become an in...

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Problems solved by technology

[0006] The present invention provides a phase-change electric heat storage heating system and method based on PID+adaptive feed-forward compensation under different working conditions. Its purpose is to solve the existing problems in the past; The phase-change electric heat storage system with two different working conditions of heating and pure heat release during the peak and valley periods. The temperature of the heat storage body is always changing during the heating process. The temperature of the heating outlet is related to the wind temperature, wind speed, and storage The problem of the complex temperature change relationship of the heating body is aimed at the problem that the traditional control often cannot meet the dynamic characteristics requirements of the electric thermal energy storage control in the process of heating outlet water temperature adjustment, the overshoot is large in the temperature adjustment process, the adjustment time is long, and it is easy to be affected by external interference.

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