A heating control method for solar-compensated electric boilers based on valley electricity price changes

Abstract

The invention discloses a solar compensation type electric boiler heat supply control method based on valley electricity price change. The method comprises the steps as follows: a valley electricity forecast step: the valley electricity price change is forecasted with a valley electricity price forecast method based on a time sequence; a valley electricity price forecast correction step: error correction is performed on the forecast electricity price obtained in the valley electricity price forecast step; a compensation step: the fluctuation influence of the valley electricity price obtained after the forecast step is eliminated; an object control step: the output in the compensation step and the output in the valley electricity price forecast correction step are used as input, and controlregulation is performed on a great-inertia heat supply load system through prediction control. Compared with the prior art, the method has the advantages that load control is performed on a solar compensation type electric boiler system based on economic indexes through DMC prediction control, and the effects of valley electricity price fluctuation on the economy of the heat supply system are eliminated by designing a feed-forward compensation loop. The method has better control effects and certain disturbance resistance, and the economic benefits are increased effectively.

Description

technical field [0001] The invention relates to a heating control method of a solar energy compensation type electric boiler based on changes in valley electricity prices, and belongs to the field of thermal engineering control. Background technique [0002] The heating industry is closely related to people's daily life. Considering the increasing air pollution, clean heating technology is necessary. Solar energy is clean and pollution-free, but affected by seasons, climate and other factors, it is unstable. Electric boilers have no emissions and no pollution to the environment, but they consume a lot of electricity. Therefore, it is necessary to combine solar energy with electric boilers for joint heating research. [0003] In order to stabilize the temperature on the heating user side, the solar-compensated electric boiler combined heating system must be controlled. At present, most of the temperature control systems of heating systems still adopt the conventional PID (p...

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Problems solved by technology

[0004] At present, electricity prices are only divided into two prices: peak and valley electricity prices. With the electricity reform and bidding online, there may be real-time fluctuations in valley electricity prices in the future.

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