The optimal design of HVDC control and protection parameters in the case of large-scale ac and DC power system network is a valid measure to ensure achieving good transient and stable performance.

对大规模交直流网络下的高压直流控制保护系统进行参数优化设计，是保证灵活交流输电系统暂态性和稳定性良好的重要手段。

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Presented in this paper are the structure of SIBAS32 control system, TCN train communication network and its CCU control soft of type HXD1 high-power AC electric locomotive.

介绍HXD1型大功率交流电力机车用SIBAS32控制系统、TCN列车通讯网络及其CCU控制软件的结构，分析机车网侧部件控制、自动过分相控制、操作逻辑控制、牵引/制动控制等功能，给出了机车故障诊断和调试的方法。

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