Energy optimization scheduling method for island multi-energy complementary electricity-gas coupling system

Abstract

The invention relates to an energy optimization scheduling method for an island multi-energy complementary electricity-gas coupling system. The method is characterized by comprising the following steps of: constructing a wind-light-diesel-gas-storage island multi-energy complementary electricity-gas coupling system; establishing an objective function taking economy as an optimization objective, and solving the model through a particle swarm algorithm; constructing a target function with maximum scheduling system income as an optimization target, and considering electricity selling income, gas selling income, operation maintenance cost of each generator set, a power-to-gas system and an energy storage system, distributed energy discarding punishment cost and diesel generator pollution abatement cost; finally, achieving the aims of absorbing distributed energy output redundancy and reducing the wind abandoning rate and the light abandoning rate. Meanwhile, through coordinated output of the fuel cell and the gas turbine, the permeability of the distributed energy can be effectively improved, the permeability of a diesel generator is reduced, and the problem of domestic gas consumption of residents is solved through stable CH4 supply. The method has the advantages of being scientific, safe, stable, reasonable, efficient, economical and environment-friendly.

Description

technical field [0001] The invention relates to the field of eliminating redundant output of distributed energy sources through power-to-gas technology, and in particular to an energy optimization scheduling method for an isolated island multi-energy complementary electric-gas coupling system. Background technique [0002] There are a large number of residential areas and scientific research sites in mountainous areas, islands, borders and polar regions. Since these small and medium-sized living areas are far away from cities, many power supply islands have been formed. The existing technology mostly adopts the off-grid mode to solve the power supply and distribution problems in these areas. The island microgrid power supply and distribution system in off-grid mode usually includes traditional energy generators represented by diesel generators, and new clean energy represented by wind turbines and photovoltaics. Diesel generator sets are not easily disturbed by the outside ...

AI Technical Summary

Problems solved by technology

[0006] (1) In the research on power-to-gas technology and power network coordination and optimization, most of the discussions are carried out on the output of each power generation module at the level of dispatching, and full consideration is given to the power-to-gas product H 2 and CH 4 The calorific value, safety, stability, and detailed discussion of the specific participation process of the power-to-gas products in promoting the research of the electric-gas coupling network are less;

[0007] (2) In most studies introducing power-to-gas technology, only the action route of one of the power-to-gas products has been elaborated in detail, and the H 2 and CH 4 The two coordinate and work together in the same system to carry out detailed research;

[0008] (3) In the research on multi-energy complementary electricity-gas coupling network optimization dispatching with the introduction of power-to-gas technology, the second process of power-to-gas, that is, the hydrogen methanation process, mostly does not control CO 2 Detailed explanation of the source, no modeling analysis for carbon capture and direct air capture technologies

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