Typical Grid Connection Schemes for Distributed PV Projects

This document outlines typical grid connection schemes for distributed photovoltaic (PV) power generation projects, developed in accordance with the National Energy Administration's regulations. It covers three main voltage levels: 380/220V AC, 10kV AC, and 110/35kV AC. For 380/220V systems, schemes include full grid connection and self-consumption with surplus electricity, applicable for single grid-connected points up to 400kW (8kW for 220V). For 10kV systems, schemes cover full grid connection (400kW-6000kW), self-consumption with centralized access, and self-consumption with decentralized access (total up to 6000kW). For 110/35kV systems, schemes address self-consumption with centralized or decentralized access for large-scale industrial and commercial projects, with total installed capacity limits of 50MW for 110kV and 20MW for 35kV. Each scheme specifies grid connection points, such as public lines, substations, or user-side buses, and may include reactive power compensation devices. The document serves as a reference for distributed PV developers to select appropriate grid integration methods based on project scale and grid conditions.