Economic dispatching method of electrothermal integrated energy system based on double multiplier iterative algorithm

Abstract

The present invention proposes an economic scheduling method for the electrothermal integrated energy system based on a double-multiplier iterative algorithm. The process includes: establishing an economic scheduling model for the electrothermal integrated energy system; using the Lagrange multiplier method to solve the economic scheduling model for the electrothermal integrated energy system, and transforming it into an optimal scheduling problem; Design a double-multiplier iterative algorithm to solve the above optimal scheduling problem, find the optimal output of each unit under the constraint conditions, and calculate the minimum value of the total operating cost under the optimal scheduling of the electrothermal integrated energy system; the economic dispatch model of the electrothermal integrated energy system in the present invention is the first The network transmission loss is considered, and real-time calculation can be realized; the collaborative optimization configuration of the two energy sources of electric heating is realized; under the premise of taking the network transmission loss into account, the production capacity cost of the enterprise can be reduced while meeting the two load demands of the user; the invention proposes The double-multiplier iterative algorithm can avoid directly solving multi-dimensional implicit equations, reduces the complexity of the model solution and has a fast convergence speed.

Description

technical field [0001] The invention relates to the technical field of economic dispatching of comprehensive energy systems, in particular to an economic dispatching method for electric-thermal comprehensive energy systems based on a double multiplier iterative algorithm. Background technique [0002] As an important part of technical and economic optimization in power system operation, economic dispatching aims to minimize the total operating cost of the system by optimizing the distribution of load demand and rationally arranging the power generation plan under the premise of satisfying the operating constraints of power generation units. [0003] Integrated Energy System (Integrated Energy System) focuses on the tight coupling of different energy system infrastructures, and supports the two-way flow of energy in different physical networks through energy conversion equipment to achieve multi-energy collaborative optimal configuration. The economic dispatch of the integrat...

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Problems solved by technology

[0004] However, at present, the integrated energy system takes the electrothermal integrated energy system as the main research form, and its economic dispatch mainly focuses on system modeling, wind power consumption, and uncertainty research on the energy supply side and the load side, lacking in the system power balance. The consideration of network transmission loss ignores the important impact of network transmission loss on the balance of supply and demand of the system, so the optimal scheduling result will lead to: the output of the unit cannot meet the actual demand of the load, affecting the normal energy demand of the user side; the system power balance Can not be effectively guaranteed, resulting in frequency fluctuations that endanger the safe and stable operation of the system

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