摘要
新能源场站的大规模接入，当前的电力网络中普遍接入柔性直流系统。其作为基于电压源换流器（VSC）的高压直流输电技术，能够对有功功率和无功功率独立控制，在电网中应用有很高的灵活度，对各种电力需求有很好的适应度。然而，新能源场站接入柔性直流系统运行过程中，交流线路故障难以避免。为保证系统安全稳定运行，就要准确识别故障并采用科学有效的保护技术，本论文针对新能源场站接入柔性直流系统的交流线路故障识别与保护技术展开研究。
关键词： 新能源场站；柔性直流系统；交流线路；故障识别；保护技术
Abstract
With the large-scale integration of new energy stations, flexible DC systems are widely used in the current power network. As a high-voltage direct current transmission technology based on voltage source converter (VSC), it can independently control active power and reactive power, and has high flexibility in application in the power grid, with good adaptability to various power demands. However, during the operation of new energy stations connected to flexible DC systems, AC line failures are difficult to avoid. To ensure the safe and stable operation of the system, it is necessary to accurately identify faults and adopt scientifically effective protection technologies. This paper focuses on the research of fault identification and protection technologies for AC lines connected to flexible DC systems in new energy stations.
Key words： New energy station; Flexible DC system; AC line; Fault identification; Protection technology
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