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.
此设计利用晶闸管、二极管等器件设计了一个转速、电流双闭环直流晶闸管调速系统。
The design uses thyristors, diodes and other devices designs a speed, current double-loop SCR DC converter system.
仿真结果表明：当南桥、华新换流站发生直流输电单双极闭锁以及交、直流侧短路故障时，不会给系统带来稳定问题。
The results show that occurrence of the single or double pole block on the DC lines, or short-circuit faults on the DC or AC lines will not influence seriously on power system stability.
仿真结果表明：当南桥、华新换流站发生直流输电单双极闭锁以及交、直流侧短路故障时，不会给系统带来稳定问题。
The results show that occurrence of the single or double pole block on the DC lines, or short-circuit faults on the DC or AC lines will not influence seriously on power system stability.
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