Research on Key Points of Distribution Network Protection Configuration for New Energy Integration
面向新能源接入的配电网保护配置关键点研究

摘要

双碳战略推进背景下，分布式光伏、风电等新能源大规模并入配电网，彻底改变传统配电网单向供电运行模式， 电网潮流双向流动、故障电流特性大幅改变，原有继电保护配置方案难以满足安全运行要求，极易出现保护误动、拒 动、整定失配等问题。本文结合新能源并网运行特征，从保护层级划分、设备选型、定值整定、防孤岛防护、协同配 合等方面明确保护配置核心关键点，提出适配高比例新能源接入的配电网整体保护配置方案，优化传统保护运行逻辑 与整定方式，完善线路、母线、并网点全维度保护体系，有效提升故障判别精度与动作可靠性，保障有源配电网稳定 运行与新能源高效消纳，可为基层配网改造、继电保护升级提供实践参考。 

Abstract

Under the background of advancing the dual-carbon strategy, large-scale distributed photovoltaic power, wind power, and other new energy sources have been connected to distribution networks, completely changing the traditional one-way power supply operation mode of distribution networks. As a result, power flow has become bidirectional, and fault current characteristics have changed significantly. Existing relay protection configuration schemes can no longer meet the requirements for safe operation, making problems such as protection misoperation, failure to operate, and setting mismatch highly likely to occur. Based on the grid-connected operation characteristics of new energy, this paper clarifies the core key points of protection configuration from the aspects of protection hierarchy division, equipment selection, setting value adjustment, anti-islanding protection, and coordination. It proposes an overall protection configuration scheme for distribution networks adapted to high-proportion new energy integration, optimizes the operating logic and setting methods of traditional protection, and improves the full-dimensional protection system for lines, buses, and grid-connection points. These measures can effectively improve fault identification accuracy and operation reliability, ensure the stable operation of active distribution networks and the efficient consumption of new energy, and provide practical reference for grassroots distribution network renovation and relay protection upgrading.