Harmonic cancellation of a hybrid converter
Harmonic cancellation of a hybrid converter
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DOI：
10.1109/61.714498
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发表时间：
1998-10
影响因子：
4.4
通讯作者：
Hongbo Jiang;A. Ekstrom
中科院分区：
文献类型：
--
作者：
Hongbo Jiang;A. Ekstrom
到目前为止，所有HVDC电力换流器变电站都是由线路换向电流源换流器（CSC）构成的。CSC具有鲁棒性强，能够控制直流电流的优点，特别是在直流线路接地故障时。然而，一个缺点是对AC电压干扰的敏感性和需要从AC系统提供无功功率。另一方面，对AC网络中的干扰较不敏感并且可以供应无功功率的强制换向电压源功率转换器（VSC）具有更昂贵并且对DC侧上的干扰非常敏感的缺点。一些研究已经表明，可能的替代解决方案可以是使用由在DC侧与VSC串联连接的CSC组成的混合功率转换器。研究结果表明，电压源型变换器可以作为有源滤波器，补偿电流源型变换器在交流侧产生的谐波。
All HVDC power converter substations have until now been built up of line commutated current source converters (CSCs). The CSC has the advantages of being robust and able to control the DC current especially at ground faults on the DC lines. However, one disadvantage has been the sensitivity to AC voltage disturbance and the need to supply reactive power from the AC system. A forced-commutated voltage source power converter (VSC) which would be less sensitive to disturbances in the AC network and which can supply reactive power has, on the other hand, the disadvantage of being more expensive and very sensitive to disturbance on the DC side. Some studies have shown that a possible alternative solution could be to use a hybrid power converter consisting of a CSC connected in series on the DC side with a VSC. It is shown in this study that the VSC can be used as an active filter to compensate the harmonics generated to the AC side from the current source converter.