Research on Improving the Capacity and Flexibility of Distribution Network under Overmuch Distributed Photovoltaics Access

With the development of distributed photovoltaic, the impact on power grid hosting capacity, voltage quality, lines loss and other aspects is also increasing. This paper proposes a system of planning measures to improve the hosting capacity of new energy. Firstly, a calculation method for the evaluation of the hosting capacity of new energy is developed, which can evaluate the new energy hosting capacity of the county-level power grid. Then, from the perspective of energy interaction station construction and energy storage application, it puts forward measures to improve the flexibility of distribution network, which can effectively improve the hosting capacity of distribution network and improve the stable operation level of power grid.