直流输电系统的可靠性指标总计超过 10 项，其中主要可靠性指标有4项，分别是停运次数、 降额等效停运小时、能量可用率、能量利用率。
高压直流输电系统中最关键的部分是控制保护部分。
Control and protect section is the most pivotal section in HVDC system.
控制保护系统的运行情况直接影响着直流输电系统的安全稳定运行。
The stable and secure operation of an HVDC transmission system is influenced by the operating performance of its control and protection system.
直流输电的控制和保护二次系统是国产化的重点，而脉冲发生器是控制和保护系统中的关键技术之一。
The heart of HVDC link is its control and protect system, and my work is focused on firing-pulse generator―an important part in the control and protect system .
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