According to the latest grid‐connected standard, the failure of IIDG (inverter‐interfaced distributed generator), represented by wind power and photovoltaic power, is characterized by strong nonlinear output. Therefore, the protection scheme based on the traditional fault characteristics is difficult to be applied to the distribution network with high permeability IIDG access. Based on the low voltage traversing operation characteristics of PQ control strategy IIDG, the work analyzed the distribution characteristics of positive sequence fault components in distribution network, and proposed a pilot protection scheme for distribution networks based on the comparison of current amplitudes on both sides of line. This scheme not only reduced the strict requirement of pilot protection for synchronous sampling of communication facilities, but also eliminated the influence of load current. Moreover, it had good practicability and economy without the protection and cooperation with other components. At the same time, in order to avoid the misoperation of amplitude ratio protection criterion for non‐fault line due to the existence of unmeasured load branches, the distribution characteristics of node branch current abrupt changes were used to establish the auxiliary criterion for node‐branch current mutation. It solved the action dead zone of the ratio protection criterion. Finally, the feasibility of the proposed protection principle was verified by DIgSILENT simulation. © 2020 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

中文翻译：

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考虑逆变器接口分布式发电机低压穿越的配电网先导保护方案

根据最新的并网标准，以风力和光伏发电为代表的IIDG（逆变器接口分布式发电机）的故障具有强烈的非线性输出的特征。因此，基于传统故障特征的保护方案难以应用于具有高磁导率IIDG接入的配电网。基于PQ控制策略IIDG的低压穿越运行特性，对配电网正序故障分量的分布特性进行了分析，提出了基于线路两侧电流幅值比较的配电网先导保护方案。 。该方案不仅降低了对通信设施同步采样的飞行员保护的严格要求，而且消除了负载电流的影响。而且，它在没有其他组件的保护和合作的情况下具有良好的实用性和经济性。同时，为了避免由于未测负载支路的存在而导致的非故障线路幅值比保护准则的误操作，采用节点支路电流突变的分布特性建立了节点支路的辅助判据。当前的突变。解决了比例保护准则的动作死区。最后，通过DIgSILENT仿真验证了所提出保护原理的可行性。©2020日本电气工程师学会。由Wiley Periodicals LLC发布。它没有其他成员的保护和合作，具有良好的实用性和经济性。同时，为了避免由于未测负载支路的存在而导致的非故障线路振幅比保护准则的误操作，采用节点支路电流突变的分布特性建立了节点支路的辅助判据。当前的突变。解决了比例保护准则的动作死区。最后，通过DIgSILENT仿真验证了所提出保护原理的可行性。©2020日本电气工程师学会。由Wiley Periodicals LLC发布。它没有其他成员的保护和合作，具有良好的实用性和经济性。同时，为了避免由于未测负载支路的存在而导致的非故障线路振幅比保护准则的误操作，采用节点支路电流突变的分布特性建立了节点支路的辅助判据。当前的突变。解决了比率保护准则的动作死区。最后，通过数字仿真验证了所提出保护原理的可行性。©2020日本电气工程师学会。由Wiley Periodicals LLC发布。利用节点分支电流突变的分布特征建立了节点分支电流突变的辅助判据。解决了比率保护准则的动作死区。最后，通过DIgSILENT仿真验证了所提出保护原理的可行性。©2020日本电气工程师学会。由Wiley Periodicals LLC发布。利用节点分支电流突变的分布特征建立了节点分支电流突变的辅助判据。解决了比率保护准则的动作死区。最后，通过DIgSILENT仿真验证了所提出保护原理的可行性。©2020日本电气工程师学会。由Wiley Periodicals LLC发布。