By digital simulation, the Ac carried wave system and its equivalent Dc system are checked and the feasibility of Dc method equivalent to the Ac carrier wave system is verified.

通过数字仿真，比较了交流载波系统和其等效直流系统，验证了交流载波系统等效直流方法的可行性。

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Its software is designed to calculate the running parameters of the AC drive system, including transformer, quadrant rectifier, DC circuit, inverter, AC motor and train load.

系统采用软件方式实时计算交流传动系统的运行参数，包括变压器、四象限整流器、直流中间回路、逆变器、电机及负载。

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The problem of oversimplification and improper selection of DC model, which exists in the DC modeling when AC and DC systems interact in AC/DC hybrid power system, is discussed.

讨论了目前研究交、直流混合电网交直流系统相互作用时在直流建模上存在的模型过度简化及模型选用不恰当的问题；

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