An economic dispatching method based on double multiplier iterative algorithm for electric-thermal integrated energy system

Abstract

The invention provides an economic dispatching method of an electric-heating integrated energy system based on a double multiplier iterative algorithm. The process comprises the following steps: establishing an economic dispatching model of the electric-heating integrated energy system; The Lagrange multiplier method is used to solve the economic dispatching model of electric-heating integrated energy system, which is transformed into an optimal dispatching problem. A double multiplier iterative algorithm is designed to solve the above-mentioned optimal scheduling problem, and the optimal output of each unit under the constrained conditions is found, and the minimum total operating cost under the optimal scheduling of the electric-thermal integrated energy system is calculated. The economic dispatching model of the electric-heating comprehensive energy system of the invention firstly considers the network transmission loss and can realize the real-time calculation; Realized two kinds of electric heating energy coordinated optimization disposition; On the premise of considering the transmission loss of the network, it can meet the two kinds of load demands of the users and reduce the production capacity cost of the enterprise. The double multiplier iterative algorithm proposed by the invention can avoid directly solving the multi-dimensional implicit equations, reduce the complexity of model solution and have a fast convergence rate.

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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