Distribution network optimization method of gas-power integrated energy system considering combined gas-power demand response

Abstract

The invention discloses a gas-electricity integrated energy system distribution network optimization method considering the gas-electricity combined demand response, aiming to minimize the operating cost of the distribution network system and combining with the set related operation constraints, to establish a gas-electricity integrated energy system distribution network Optimize the running model. Aiming at the nonlinear AC power flow equation constraint of distribution network, the second-order cone relaxation method is used to deal with it; for the nonlinear Weymouth flow equation of gas distribution network, an enhanced second-order cone relaxation method is proposed, which adds a pressure penalty term to the objective function. The relaxed constraints are further tightened, and the non-convex optimization problem is transformed into a convex optimization problem for solving, so as to achieve higher relaxation accuracy. On the basis of the distribution network optimization dispatching model, an operation strategy is proposed to improve the new energy consumption capacity and operation economy of the distribution network system by using the combined demand response of gas and electricity.

Description

technical field [0001] The invention belongs to the technical field of optimized operation of an integrated energy system, and in particular relates to a distribution network optimization method of an integrated gas-electricity energy system considering gas-electricity combined demand response. Background technique [0002] Low-cost, efficient and environmentally friendly natural gas has become the second largest source of energy consumption in the world, which has greatly promoted the rapid development of gas-fired units (NGU). In recent years, the significant increase in the investment of gas-fired units and the increasing maturity of power-to-gas technology have strengthened the interdependence between power and natural gas systems, laying the foundation for the formation of a gas-power integrated energy system. The gas-electricity integrated energy system uses the slow inertia of the natural gas system to convert excess electric energy such as new energy power generation...

AI Technical Summary

Problems solved by technology

Due to some physical operating characteristics in the electricity and natural gas distribution network, most of the established optimal operation models of the gas-electricity integrated system are nonlinear and non-convex, which will bring great difficulties to the model solution

Scholars at home and abroad have done a lot of research on the processing methods of nonlinear operating constraints in gas-electric integrated energy systems. At present, most of the research results use linearization methods and convex optimization methods to directly deal with nonlinear constraints, which may not be able to operate in any operating state. Download to meet the optimal requirements of the trend

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