This article presents, for the first time, the steady-state analysis of composite ac_dc grids embedded with solid-state transformers (SSTs) taking into account the high-frequency transformers in the dc_dc converters of the SSTs. A novel steady-state model of the SST is presented in this article, which includes loss calculations, and facilitates steady-state and impact analysis without complex and time-consuming time-domain simulation. The new steady-state model of the SST proposed in this article was validated using the time domain simulation of the detailed model in a two-bus topology on the MATLAB/Simulink platform. Subsequently, the proposed approach has been implemented in two additional case studies to validate its enhanced performance when utilizing SSTs and demonstrate how the proposed model can be employed for steady-state analysis of the modern grids that encompass a diverse range of converter-interfaced renewable energy generation sources, as well as the system that contains both ac and dc loads.

中文翻译：

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AC__C电网中顺序AC__C潮流的固态变压器稳态模型


本文首次介绍了嵌入固态变压器 (SST) 的复合 ac_dc 电网的稳态分析，并考虑了 SST dc_dc 转换器中的高频变压器。本文提出了一种新颖的海表温度稳态模型，其中包括损耗计算，并有助于稳态和影响分析，而无需复杂且耗时的时域仿真。本文提出的 SST 新稳态模型通过 MATLAB/Simulink 平台上两总线拓扑中详细模型的时域仿真进行了验证。随后，所提出的方法已在另外两个案例研究中得到实施，以验证其在利用 SST 时的增强性能，并演示如何采用所提出的模型对包含各种转换器接口可再生能源的现代电网进行稳态分析发电源以及包含交流和直流负载的系统。