Protection Coordination of AC/DC Intersystem Faults in Hybrid Transmission Grids
Protection Coordination of AC/DC Intersystem Faults in Hybrid Transmission Grids
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DOI：
10.1109/tpwrd.2020.3000731
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发表时间：
2020-06
影响因子：
4.4
通讯作者：
J. Prommetta;J. Schindler;J. Jaeger;T. Keil;C. Butterer;G. Ebner
中科院分区：
文献类型：
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作者：
J. Prommetta;J. Schindler;J. Jaeger;T. Keil;C. Butterer;G. Ebner
交直流混合输电网的新特点和新现象对传统的保护概念提出了挑战。在混合AC/DC架空线系统中，AC和DC系统位于相同的支撑结构上。因此，AC和DC线路之间的电磁和电流相互作用以新颖且复杂的方式影响AC保护和DC控制。本文介绍了当前德国400 kV交直流混合架空线路项目的主要发现和解决方案。重点是AC/DC系统间故障，即DC和AC系统之间的电流接触。讨论了交流保护和直流控制的故障检测和故障响应以及适当的AC/DC保护配合。本文阐述了安全可靠的故障清除所面临的挑战，并指出了解决方法。本文的研究结果是基于EMT仿真与详细的PSCAD模型的混合AC/DC架空线和VSC转换器。已进行了实验室保护测试，并证实了结果。
The new characteristics and phenomena of hybrid AC/DC transmission grids challenge the conventional protection concepts. In hybrid AC/DC overhead line systems, AC and DC systems are located on the same support structure. As a result, electromagnetic and galvanic interactions between the AC- and the DC-line influence the AC-protection and the DC-control in a novel and complex way. This paper presents key findings and solutions from a current 400-kV-hybrid AC/DC overhead line project in Germany. The focus is on AC/DC intersystem faults, i.e. galvanic contact between DC and AC systems. Fault detection and fault response of the AC-protection and the DC-control as well as a proper AC/DC protection coordination are discussed. The paper illustrates the challenges of a secure and dependable fault clearing and indicates solution methods. The findings of this paper are based on EMT simulations with detailed PSCAD-models of the hybrid AC/DC overhead line and the VSC-converters. Laboratory protection tests have been conducted and confirmed the results.