Abstract
Aiming at the problem of carbon emission in the operation of wind-solar-storage DC micro-grid, this paper establishes a bi-level programming model of DC micro-grid based on comprehensive consideration of carbon emission cost, system operation and maintenance cost, equipment depreciation cost, micro-grid interaction cost, time-of-use price and renewable energy environmental benefits. The upper model aims to maximize the net economic benefit of DC micro-grid charging and discharging, and optimize the energy storage operation strategy. The lower model considers the carbon emissions of DC micro-grid. In this model, carbon emission flow(CEF) and economic operation are considered together to realize low-carbon economic dispatch. Energy storage system and DC micro-grid are combined together to realize low-carbon, new energy consumption and economy. A case study is carried out for a practical wind-solar-storage DC micro-grid system in the southern region. The rationality of the proposed model is verified.
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