An economical optimal dispatching method for electric-thermal integrated energy system considering transmission loss

Abstract

The invention provides an economical optimal dispatching method for electric-thermal integrated energy system considering transmission loss. The process comprises the following steps: establishing aneconomic optimal dispatching model of the electro-thermal integrated energy system; using the Lagrange function method to analyze the conversion optimization dispatching problem. An iterative algorithm is designed to solve the optimal dispatching problem and the optimal solution is obtained. The optimal value of the economic optimal dispatching model of the electro-thermal integrated energy system, that is, the minimum value of the total cost, is calculated. The invention considers the important influence of the transmission loss on the supply and demand balance of the system and the output optimization of the unit, and considers the electric power network, the thermal pipe network, the electric heating multi-energy coupling, the unit output restriction and the operation restriction many kinds of constraint conditions; on the premise of considering the transmission loss of network, the method can meet the demand of users and reduce the cost of production capacity, so as to improve theeconomic benefits and ensure the safe and stable operation of the system; the fast iterative algorithm is used to convert the quadratic constraint of the electric force equation into affine constraint, which reduces the complexity of the model and has a faster convergence rate.

Description

technical field [0001] The invention relates to the technical field of economic dispatching of comprehensive energy systems, in particular to an economical optimization dispatching method of electric heating comprehensive energy systems considering transmission loss. Background technique [0002] With the depletion of global fossil energy, environmental pollution, and severe climate situation, how to improve energy utilization and realize clean production capacity has become the focus of attention of all countries in the world under the premise of meeting people's demand for various energy sources. Open source and throttling are the main means to effectively solve the above problems: open source is to seek more available energy to ensure the continuous supply of energy; throttling means to strive for less energy waste to delay the exhaustion of energy and reduce environmental pollution . [0003] The Integrated Energy System (IES) focuses on the tight coupling of different ...

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Problems solved by technology

However, at present, IES economic dispatch mainly focuses on system modeling, wind power consumption, and uncertainty research on the energy supply side and load side, lacks the consideration of network transmission loss in the system active power flow, and ignores the impact of network transmission loss on the system. The important impact of supply and demand balance, such an optimal scheduling result can not meet the actual demand of the load, or affect the grid frequency and endanger the safe and stable operation of the system

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