Summary of Distributed Photovoltaic Hosting Capacity Analysis and Improvement Measures for Distribution Network

To meet the rapid development of distributed photovoltaics and enhance the grid's ability to accommodate distributed photovoltaics, it is necessary to fully leverage the power supply role of distributed photovoltaics. This will accelerate the construction of a new type of power system and energy system with gradually increasing penetration of renewable energy sources. Therefore, it is critically important to scientifically and reasonably evaluate the carrying capacity of the distribution grid for distributed photovoltaics and propose improvement measures for the existing shortcomings. This article summarizes the research and current status of the analysis and improvement measures for the hosting capacity of distributed photovoltaics in distribution grids. Firstly, it summarizes relevant domestic and international literature, and summarizes the calculation methods and corresponding shortcomings of the distributed photovoltaics hosting capacity, including power flow back feeding, thermal stability, short-circuit current, voltage deviation, harmonics, and three-phase imbalance. Secondly, it introduces strategies and technologies for enhancing the hosting capacity of distribution grids from the perspectives of generation, network, load, and storage. Finally, it summarizes the shortcomings of existing research and proposes future research directions and challenges.