Building temperature control method and system based on model predictive control

Abstract

The invention discloses a building temperature control method and system based on model predictive control. Based on model predictive control (MPC), the method performs heat supply temperature adjustment, adds prediction of interference in predictive control, and compensates for upcoming ambient temperature changes. The system comprises: an MPC controller for maintaining the room temperature of abuilding at a determined most comfortable temperature value and calculating an optimal heat supply temperature value; a PID controller used for controlling an executing mechanism to respond accordingto the optimal heat supply temperature value and the secondary side water supply and return temperature; an executing mechanism for adjusting the primary side hot water flow of a heat exchanger and controlling the temperature of secondary side hot water through the heat exchanger; a first temperature sensor for collecting the temperature of the secondary side hot water of the heat exchanger and sends the temperature to the PID controller; and a second temperature sensor used for collecting the indoor real-time temperature of the building and sending the indoor real-time temperature to the MPCcontroller. According to the method and the system, the indoor temperature is more stable, the comfort level of a user is improved, and the heat supply energy consumption is remarkably reduced.

Description

technical field [0001] The invention relates to a building temperature control method and system based on model predictive control, belonging to the technical field of heat supply control. Background technique [0002] Many countries have heating needs in winter, including heating design of residential buildings and non-residential buildings. In northern China, urban and some rural areas are dominated by central heating. The steam and hot water generated by the centralized heat source pass through the primary heat exchange station and the primary pipe network to the secondary heat exchange station, where heat exchange is performed in the secondary heat exchange station, and the heat is transferred to the secondary pipe network, and the heat passes through the secondary pipe network. The net is passed to the heat users at the grassroots level for production and life. Such as figure 1 As shown, the secondary heat exchange station is responsible for the concentration and exc...

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Problems solved by technology

[0003] At present, the heating temperature of the heat exchange station is mostly adjusted by the operator based on experience and the current outdoor temperature. When the outdoor temperature drops, the water supply temperature is increased, and when the outdoor temperature rises, the water supply temperature is lowered. The heating effect depends on the professional experience of the operator. The degree of automation and intelligence is low, and it is an open-loop control method

In addition, since the heating system has a large time constant, and the operator does not take into account the forecast of future weather when setting the heating temperature, it may take a long time for the indoor temperature to stabilize within the comfortable range after the water supply temperature is adjusted, and it is likely that It will cause underheating or overheating, resulting in a decrease in thermal comfort for users or unnecessary waste of energy

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