【摘要】 为提高大规模交直流系统PSCAD/EMTDC仿真模型建立的效率,基于PSS/E数据文件,提出了一套系统快速建模的程序化流程。给出了PSS/E和PSCAD/EMTDC之间关键元件的模型对应关系,并描述了快速建模的详细过程:先提取元件连接、元件参数等信息,通过区域判据和电压分层实现网络模块化,再结合坐标变换完成整个网络在各子模块下的布局、元件模型的建立及各参数的设定,最后,通过自动布线生成PSCAD/EMTDC仿真模型。仿真结果表明,在稳态、直流闭锁和交流对称故障下,转换前后的系统稳态和暂态特性相一致,该结果验证了快速建模方法的有效性;在交流不对称故障下,模型转换前后的机电暂态与电磁暂态特性不一致,这表明了机电暂态仿真程序的局限性和电磁暂态仿真程序的必要性。更多还原

【Abstract】 In order to improve the efficiency of modeling large-scale AC/DC systems in PSCAD/EMTDC,a fast modeling method based on PSS/E data files is proposed.After presenting the relationship between the components of PSS/E and PSCAD/EMTDC,the fast modeling method is described in detail:firstly,the information of the system components,such as the parameters and conjunctive relations,is extracted;secondly,the layout of the whole power network in each sub-module is completed by combining the coordinate transformation and the network modularity realized by area criterion and voltage layer,meanwhile,the components modeling and the parameters settings are also completed;finally,the PSCAD/EMTDC simulation model is built by auto routing.Simulation results show that,in steady-state faults or DC-blocking-state faults or symmetrical-AC faults,the steady and transient characteristics of a system are coincident before and after the transformation,verifying the efficiency of the proposed modeling approach.Moreover,the inconsistency between the electromechanical and electromagnetic transient characteristics of a system under asymmetrical AC faults indicates the limitation of electromechanical transient simulation and the necessity of electromagnetic transient simulation.更多还原