电网互联及高压直流输电的发展对电力系统仿真软件提出了新的要求。针对我国较大规模电力系统数据存储多为机电暂态仿真软件格式，而机电暂态仿真软件无法反映系统的电磁暂态过程这一问题，本文对电网模型由机电暂态仿真软件PSASP向电磁暂态仿真软件ATP-EMTP的转换方法进行了研究，并将提出的自动转换系统应用于实际电网，提高了模型转换的效率。 对于小规模电力系统模型，本文对比分析了PSASP和ATP-EMTP中的元件模型特征及参数，选择了合适的模型后，针对两种软件的同一元件模型的对应参数和非对应参数分别研究了数学转换关系，并以3机9节点网络及扩展30节点网络为例，通过对比PSASP和ATP-EMTP中网络模型的潮流计算及短路计算结果，验证了各元件电气参数转换关系的准确性。 对于较大规模电力系统模型，手动建模过程冗杂且易造成误差。针对这一问题，本文深入研究了PSASP和ATP-EMTP的输入数据形式，通过ATP-EMTP可视化输入文本及数据卡片的配合使用，利用节点重新命名、有效网络数据选择、相应数据转换、以及数据写入并建模四个模块，构造了电网模型由PSASP向ATP-EMTP的自动转换系统，并对大规模电网的电磁暂态模型调试相关问题提出了解决办法，节省人力的同时，提高建模准确性。 最后，本文在ATP-EMTP中建立了陕西网的电磁暂态模型。针对交流系统，通过潮流计算和短路计算检验了模型的准确性；针对直流系统，对比分析了ATP-EMTP中控制模型TACS和MODELS的特点，提出使用更为灵活的MODELS控制模型对换流阀进行控制，其仿真结果更符合线路实际运行情况。验证了本文提出的自动转换系统可应用于实际网络。

With the development of grid interconnection and HVDC transmission, new requirements for power system simulation software are put forward. The larger scale power system data storage is mostly electromechanical transient simulation software format, however, the electromechanical transient simulation software cannot reflect the electromagnetic transient process of the system. In order to solve this problem, the conversion method of electromechanical transient simulation software PSASP to electromagnetic transient simulation software ATP-EMTP is studied in this paper, and applying the automatic conversion system to the actual grid, the efficiency of model conversion has improved. For small-scale power system models, the component features and model parameters of electromechanical transient simulation software PSASP and electromagnetic transient simulation software ATP-EMTP are compared and analyzed in this paper. After selecting the appropriate model, the mathematic conversion relationship is studied separately for the corresponding parameters and non-corresponding parameters in the same component model of the two software. And taking the 3 machine 9-node network and extended 30-node network as examples, the electrical parameter conversion theory of each component is verified by comparing the results of power flow calculation and short-circuit calculation of the network model in PSASP and ATP-EMTP. For larger scale power system models, the process of manually building a model is complex and prone to errors. To solve this problem, this paper deeply studies the input data forms of PSASP and ATP-EMTP, by using the ATP-EMTP visual input text and data card, an automatic conversion system from PSASP to ATP-EMTP is constructed, which consists of four modules: node renaming, effective network data selection, corresponding data conversion, and data writing and modeling. And the solutions of the problems related to the debugging of electromagnetic transient models of large-scale power grids is proposed. The automatic conversion system is efficient and accurate. Finally, the electromagnetic transient model of Shaanxi network are established in ATP-EMTP. The accuracy of the model is verified by the power flow calculation and short circuit calculation in the AC system. For the DC system, the characteristics of the control model TACS and MODELS in ATP-EMTP are compared and analyzed, it is proposed to control the converter valve with a more flexible MODELS control model. The simulation results are more suitable with the actual operation of the line. It is proved that the automatic conversion system proposed in this paper can be applied to the actual power system