电网技术2023，Vol.47Issue(12)：4847-4855,9.DOI:10.13335/j.1000-3673.pst.2023.1299
免疫同步误差的有源配电网多端纵联保护方法
Multiterminal Pilot Protection for Active Distribution Networks Immune to Synchronization Error
摘要
Abstract
In theory,double-terminal and multi-terminal current differential protection is an effective means to solve the protection problems of the active distribution networks.However,because it is difficult for a distribution network to provide the corresponding data synchronization services,the security of the current differential protection cannot be guaranteed.To solve this problem,the universal quasi-power theorem is introduced into the active distribution network,and a fault identification based on the pseudo-power theorem is proposed in this paper.On this basis,the characteristics of the quasi-power waveform under the internal and external faults are studied,and a pilot protection criterion is designed to be suitable for the double-and multi-terminal systems and immune to the synchronization errors.Combined with the proposed protection start strategy,the fault can be removed fast and reliably without any synchronous devices.Simulation results based on the PSCAD/EMTDC verify that the proposed protection scheme is able to maintain high security under the condition of multi-terminal asynchronous sampling without being affected by the distributed generator(DG)types and the system operation modes.关键词
有源配电网/拟功率定理/纵联保护/多端/同步误差Key words
active distribution network/quasi-power theorem/pilot protection/multi-terminal/synchronization error分类
信息技术与安全科学引用本文复制引用
袁通,高厚磊,彭放,李林..免疫同步误差的有源配电网多端纵联保护方法[J].电网技术,2023,47(12):4847-4855,9.基金项目
国家自然科学基金项目(52277109).Project Supported by the National Natural Science Foundation of China(52277109). （52277109）
