为了准确分析高压直流输电系统的动态特性，针对±500 kV 江城（湖北江陵-广东鹅城）高压直流输电实例工程，给出一种基于全数字实时仿真装置（ADPSS）的机电暂态-电磁暂态混合建模方法。利用电路等值转换理论分析了机电-电磁混合仿真的计算机理，进而阐述了机电模型及电磁模型的建模方法。利用所构建的直流工程混合模型，开展了整流侧与逆变侧的交流系统分别发生接地故障的模拟仿真，并与采用交流电网化简处理的常见直流系统纯电磁建模仿真进行了比较分析。仿真结果表明，基于 ADPSS 的高压直流输电系统机电-电磁混合仿真建模方法是有效的，其相比纯电磁模型能更精确地反映直流系统的动态运行特性，从而增强仿真模型的准确度。%In order to accurately study the dynamic characteristics of HVDC power transmission system, aiming at the ± 500 kV HVDC project from Jiangling to Echeng, a hybrid modelling method based on advanced digital power system simulator (ADPSS) is proposed to carry out electromechanical-electromagnetic transient simulation. By means of circuit equivalent transformation method, the calculation principle of hybrid simulation is analyzed. Then the method for constructing electromechanical model and electromagnetic model is expounded. On the basis of the built hybrid model, the ground faults happening at AC buses connecting to rectifier and inverter are respectively simulated, and the comparison with the general electromagnetic model simplifying the simulation scale of AC system is implemented. The simulation results show that the modelling method for HVDC power transmission system based on ADPSS is valid. It can reflect the dynamic characteristics of HVDC system more precisely than pure electromagnetic model, and enhance the accuracy of simulation model.
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