Electricity-gas interconnected comprehensive energy system optimization scheduling method containing P2G wind curtailment start and stop

Abstract

An electricity-gas interconnected comprehensive energy system optimization scheduling method containing P2G wind curtailment start and stop comprises the steps of: constructing an optimization scheduling model, wherein target functions of the optimization scheduling model comprise a unit operation cost minimum function, a wind curtailment penalty function and a carbon emission weight function; constructing constraint conditions of the optimal scheduling model, including power network constraints and natural gas network constraints, the power network constraints including electric power balanceconstraints, generator set power constraints, P2G power constraints, node voltage constraints, balance node phase angle constraints and line power constraints, wherein the natural gas network constraints include gas source point constraints, pipeline flow constraints, pipe storage constraints, gas storage tank capacity constraints, compressor flow constraints and node energy balance. P2G wind curtailment start and stop constraint: enabling the input power of P2G equipment to be all from wind curtailment power in the system operation process; and when the system has no wind curtailment, the P2G equipment is in a closed state. According to the method, the carbon emission can be effectively reduced, and the unit operation cost is reduced; and meanwhile, the established model has more practical benefits.

Description

technical field [0001] The invention relates to the technical field of optimal scheduling of integrated energy systems, in particular to a method for optimal scheduling of electric-gas interconnected integrated energy systems including start-stop of P2G abandoned wind. Background technique [0002] The schematic diagram of the electricity-gas interconnection comprehensive energy system including P2G is as follows: figure 1 As shown, P2G and gas turbines bidirectionally connect the power network and the natural gas network, and the cooperation of the two can reduce the net load of the system while absorbing the curtailed wind. In addition, the electricity-gas interconnection integrated energy system will also reduce carbon emissions. As a clean energy source, natural gas can reduce carbon dioxide emissions by 60% and nitrogen oxide emissions by 50%, improving environmental quality. Gas turbines can replace part of thermal power units to reduce carbon dioxide emissions on the...

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Problems solved by technology

This causes P2G to operate as a load when there is no abandoned wind in the system to reduce the total cost of the system. However, because the abandoned wind has been completely absorbed, P2G has no practical effect at this time. When P2G operates as a load, the input power It will all come from the output of the gas turbine, and this part of the extra output has no actual benefits. Although the total cost of the system is reduced at this time, the total carbon emissions increase

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