Multi-region electricity-gas coupling comprehensive energy system optimal scheduling method considering tiered gas price

Abstract

The invention discloses a multi-region electricity-gas coupling comprehensive energy system optimal scheduling method considering tiered gas prices. The method comprises the following steps: S1, a typical combined cooling heating and power supply system are adopted in an energy supply mode of a comprehensive energy system in a region, power-to-gas equipment and gas storage equipment are arranged to consume new energy to achieve energy standby application, and a gas bus is added for constraint modeling; S2, energy connection is achieved through coupling interconnection of electric energy and natural gas between regions, the natural gas serves as main complementary energy, and an electricity-gas steady-state coupling linear power flow algorithm is completed in combination with a second-ordercone relaxation and incremental linearization method; S3, based on the electricity-gas steady-state coupling linear power flow, a double-layer linearization algorithm is adopted to solve the nonlinear problem of a compressor gas consumption model; and S4, a traditional day-ahead economic dispatching target function is optimized and perfected, the tiered gas price is considered to achieve optimaldispatching by taking the minimum total operation cost of all parks as a target through energy interconnection distribution among different functional areas, namely a residential area, a commercial area, an office area, an industrial area and the like.

Description

technical field [0001] The present invention relates to an optimal scheduling method for a multi-energy flow system, especially an optimal scheduling method for an electric-pneumatic coupling comprehensive 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 tiered gas prices, so as to achieve the purpose of optimal scheduling in the future, and specifically belong to the field of energy system optimal scheduling technology. Background technique [0002] In recent years, energy and environmental issues have gradually become the main issues that curb social development. With the popularization of new forms of energy production and utilization such as photovoltaics, solar heat, electric vehicles and combined cooling, heating and power systems, the integrated energy system (IES) characterized by "...

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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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