Variable-flow variable-temperature-area heat supply system scheduling method considering heat loss nonlinearity

Abstract

The invention relates to a variable-flow variable-temperature-area heat supply system scheduling method considering heat loss nonlinearity, which comprises the following steps: establishing a heat supply pipe network model, respectively setting a heat source and a user as different nodes, and connecting the nodes through pipelines; according to the established heat supply pipe network model, constructing an objective function and constraint conditions of a heat supply optimal scheduling strategy; processing the objective function and the constraint condition through a McCormick Envelope optimization method, and converting a nonlinear problem into a linear problem; solving the constructed linear optimization problem, and obtaining a heat supply optimal scheduling strategy under the condition that constraint conditions are met; and enabling a regional heat supply system to carry out corresponding scheduling based on the heat supply optimal scheduling strategy. The optimal scheduling method is applied to the heat supply problem of the regional heat supply network, the heat supply temperature and the flow can be used as variables, the optimal scheduling strategy is obtained under the condition that the heat loss of the pipe network is considered, the operation cost and loss of the system are reduced, and the economical efficiency of the system is improved.

Description

technical field

[0001] The invention relates to the technical field based on the optimal scheduling of district heating systems, in particular to a scheduling method for variable flow and temperature district heating systems considering the nonlinearity of heat loss. Background technique

[0002] District heating system refers to the building group in a certain area, which is composed of three parts: heat source, heat network and users. One or more heat sources provide heat, which is delivered to users through regional unified heating pipelines to meet the heat load of users. need. The hot water provided by the thermal power plant is transported to the user end through the heating pipeline to provide heat for the user, and the hot water with a lower temperature after heating is sent back to the thermal power plant through the return pipe of the heating network for reheating for recycling. There will be a certain loss of hot water in the pipeline, that is, the water temperat...

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