T/XJBX 0166-2025 Design Regulations for the Integration of Distributed Photovoltaic Power Generation into the Distribution Network

Scope

Distributed photovoltaic power generation has the characteristics of local development, nearby absorption, short construction period, and flexible access, and has become one of the main forms of new energy access to the distribution network. With the large-scale development of distributed photovoltaics and the promotion of organizational models such as "whole-county promotion", the number of distribution network access points has increased rapidly and the access forms have become increasingly diverse. The system operation has gradually evolved from "single-point access and local impact" to "multi-point parallel and superimposed coupling", putting forward higher requirements for distribution network planning and design, power quality control, relay protection and automation, communication and metering, grounding and lightning protection, grid-connected safety, and observable, measurable, and controllable capabilities. At the national and industry levels, a series of standards systems for the access of distributed power sources and photovoltaic systems to the distribution network have been formed, such as GB/T 29319 and NB/T 32015, providing a basis for grid-connected technical requirements and interface rules. This document is aimed at the engineering design phase, and it stipulates the design principles, design inputs, access scheme selection and verification, main electrical primary and secondary design points, power quality and reactive voltage control, protection and automation configuration, communication metering and network security, grounding and lightning protection, etc. for the access of distributed photovoltaic power generation to the distribution network. It emphasizes taking grid safety and stability as the bottom line, power quality and supply reliability as constraints, and observability, measurability, and controllability as guidance, promoting the upgrading of distributed photovoltaic access from "satisfying grid connection" to "friendly access and

Development Information

Related Standards