A Variable-Weight Coupling Coordination Degree Method for Evaluating the Development Level in Meshed Distribution Networks Considering Source-Load Balance

• The integration of a large number of new energy sources and flexible loads has an impact on the operation of the meshed distribution networks. • Existing indicator systems and methods are unable to evaluate the development level of different power supply grids accurately. • A new indicator system has been established to characterize the development of power supply grid sources and loads within the meshed distribution networks. • A differentiated evaluation weighting method based on variable weight theory has been proposed for multi-type power supply grids. • A comprehensive evaluation model for coupling coordination degree has been established to classify power supply grids into different levels. With the connection of a large number of flexible loads and distributed generations to meshed distribution networks, the interaction between sources and loads has become more complex. Traditional evaluation systems are no longer applicable to the differentiated evaluation of meshed distribution networks. Therefore, this paper establishes a new indicator system and proposes an evaluation method based on variable weight theory (VWT) and coupling coordination degree (CCD). First, a new indicator system is established by analyzing the impact of multiple types of source-load connections on the power grid. Second, a weighting model based on the principle of minimum discriminative information (PMDI) and variable weight theory is established. Compared with the weighting results calculated by game theory (GT), the proposed model exhibits less volatility in weighting and enhances the applicability of evaluating different power supply grids.. Finally, the CCD was used to evaluate the level of coordinated development among indicators. The results show that the proposed indicator system and comprehensive evaluation method outperform others in evaluating the source-load indicator levels of various power supply grids. The method effectively identifies the coordinated development level of power supply grids under source-load interaction, providing valuable reference for the construction of meshed distribution networks.