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中文摘要：
提出了一种适用于分布式电源（distributed generation，DG）接入的配电网自适应保护新方法。该方法根据系统的运行方式和网络的拓扑结构，对保护背侧网络进行等值变换，并根据支路贡献因子矩阵，消除DG对各支路电流的影响，在此基础上，构造配电网自适应主保护和后备保护判据。与传统电流保护相比，该方法增大了主保护和后备保护的保护范围，计算简单，易于整定。仿真结果表明，该方法不受DG接入的影响，在对称故障或不对称故障情况下均能实现保护的自适应功能。
英文摘要：
A new adaptive protection approach suitable for distribution network connected with distributed generations （DG） is proposed. Based on operational modes and topological structure of the distribution network the equivalent transform of the network back against the protection is performed and according to the contribution factor matrix of branches the influences of DG on branch currents are eliminated. On this basis, the criteria of main protection and backup protection are constructed. Comparing with traditional current protection, the proposed method expands the protection zones of protection and backup protection, and the calculation of the criteria is simple and easy to set. Simulation results show that the proposed method is not impacted by network-connected DGs, and its adaptive functions of main protection and backup protection can be implemented under symmetrical and unsymmetrical faults.
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