Abstract: Promoting the large scale grid connection of distributed photovoltaic (PV) is an important measure to achieve the goal of "carbon peaking and carbon neutrality" and to construct the new-type power system. Based on this background, this paper discusses the key technologies for the large-scale grid-connected operation of the distributed PV for the new-type power system. Firstly, the development status, the grid-connected modes, and the operation modes of the distributed PV are summarized and elaborated, and the challenges brought by the large-scale distributed PV access to the power grid dispatching and operation are analyzed. Secondly, in the face of the above challenges, the key technologies for the system scheduling and operation are discussed from the perspectives of information integration, monitoring and prediction, balanced dispatching, and aggregation controlling, in order to assist in the transformation and upgrading of the power grid regulation modes. Then, considering the actual engineering needs, a distributed PV technology standard system that meets the safe and stable operation of the power grid is conceived, with a view to promoting the distributed PV to be "observable, measurable, schedulable, controllable, and friendly interactable". Finally, the advanced experiences of the large-scale grid-connected operation of the distributed PV in some foreign countries are investigated and sorted out, and suggestions on the topics of the distributed PV in China, such as grid-connection collaboration exploration, operation service support and market transaction participation, are made.