采用优化方法选择出双极直流系统换流站直流滤波器的参数。
The DC filter parameters of converter station in dipolar DC systems are selected by optimum method.
直流输电系统主要有2种运行方式：单极运行方式和双极运行方式。
There are 2 operation modes for DC transmission system:single pole operation and double-pole operation.
其次，通过对发生单重和多重故障时的暂态稳定计算，研究了作为多回直流受端系统的广东电网在发生直流双极闭锁故障时的运行稳定性问题。
Second, by means of the transient stability calculation for single and multiple faults, the stability of Guangdong power grid as a multiinfeed AC/DC power system is studied.
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