Abstract:

The power grid serves as an important platform connecting electricity production and consumption, playing a crucial role in carbon emission reduction across society. However, currently, there is a lack of quantitative research on the power grid's contribution to facilitating carbon emission reductions from grid-connected entities. Based on the contribution allocation concept of the Shapley value method and considering both simplicity and rationality, this paper proposes a method for quantifying the power grid's contribution to the carbon emission reduction of grid-connected entities. The proportion of the power grid's contribution to the carbon emission reduction is determined by the marginal effect of the power grid on the emission reduction and can be calculated through a simplified formula. Through empirical data or theoretical calculation, this study demonstrates the carbon emission reduction of grid-connected entities with and without the power grid, and based on the relative magnitude of emission reduction under these two scenarios, the power grid's contribution to carbon reduction can be categorically discussed. When the presence or absence of the power grid does not affect the carbon emission reduction of grid-connected entities, the power grid's contribution to carbon emission reduction is zero; when the absence of the power grid renders grid-connected entity unable to achieve effective carbon emission reduction, the power grid's contribution is maximized. This method provides a novel approach and perspective for evaluating the power grid's contribution to social carbon emission reduction, offering a theoretical basis for quantifying the power grid's contribution to the low-carbon transition of society.

Key words: carbon reduction in power grid, contribution allocation, quantitative calculation, Shapley value