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Sending end frequency and voltage under islanded operation mode of HVDC transmission system

机译:高压直流输电系统孤岛运行模式下的发送端频率和电压

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Some large coal bases send power energy by high voltage direct current (HVDC) lines. Because the sending end systems of HVDC Transmissions are made up a few thermal power units, the sending end systems become island probably. It is necessary to research the frequency and voltage for these weak sending end islanding systems. In the paper, take Hu-Liao DC project as an example to carry out the researches. The first one is the change of the DC plan for the external-transmission, the second one is monopole emergency switch off sequence (ESOF) occurring in DC project, and the third one is three-phase short circuit fault occurring in the sending end. The results showed the frequency and voltage meet HVDC transmission. The control strategy can provide a reference for the power dispatching and production department.
机译:一些大型煤炭基地通过高压直流(HVDC)线发送电能。由于HVDC传输的发送端系统由几个火电单元组成,因此发送端系统可能会变成孤岛。有必要研究这些弱发送端孤岛系统的频率和电压。本文以沪辽DC工程为例进行了研究。第一个是外部传输的DC计划的更改,第二个是在DC项目中发生的单极紧急关闭序列(ESOF),第三个是在发送端发生的三相短路故障。结果表明,频率和电压满足高压直流输电。该控制策略可为电力调度生产部门提供参考。

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