An optimal scheduling method for multi-regional electric-pneumatic coupling integrated energy systems considering tiered gas prices

Abstract

The invention discloses a multi-area electricity-gas coupling comprehensive energy system optimization dispatching method considering ladder gas prices, including the following steps: the energy supply mode of the comprehensive energy system in the S1 area adopts a typical combined cooling, heating and power supply system, and additional power-to-gas equipment and storage Gas equipment is used to accommodate new energy and realize energy backup, and the gas bus constraint modeling is added; S2 areas realize energy connection through the coupling and interconnection of electric energy and natural gas, with natural gas as the main complementary energy, combined with second-order cone relaxation and incremental linearization method, complete the electric-pneumatic steady-state coupled linear power flow algorithm; S3 is based on the electric-pneumatic steady-state coupled linear power flow, and uses a double-layer linearization algorithm to solve the nonlinear problem of the compressor gas consumption model; S4 optimizes and improves the traditional day-ahead economic scheduling objective function , comprehensively considering the ladder gas price, through the interconnection and distribution of energy among different functional areas, that is, residential areas, commercial areas, office areas, industrial areas, etc., to achieve optimal scheduling with the goal of minimizing the total operating cost of all parks.

Description

technical field [0001] The invention relates to an optimal scheduling method for a multi-energy flow system, in particular to the optimal scheduling of an electric-gas coupled integrated energy system, which mainly improves the natural gas flow model by solving the nonlinear problem of the compressor, and realizes energy backup, Improve comprehensive energy efficiency, reduce regional operating costs in combination with stepped gas prices, so as to achieve the purpose of optimizing dispatching, which belongs to the technical field of energy system optimization dispatching. Background technique [0002] In recent years, energy and environmental issues have gradually become the main issues to curb social development. With the popularization of new energy production and utilization forms such as photovoltaics, solar thermal, electric vehicles, and combined cooling, heating and power systems, an integrated energy system (IES) characterized by "multi-energy coupling and complemen...

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Problems solved by technology

In addition, the traditional electricity-gas interconnection network optimization scheduling model only performs nonlinear modeling for compressors in the natural gas network, which cannot be applied to mixed integer linear programming problems. It is necessary to study appropriate linearization methods to improve the gas network power flow algorithm

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