电网技术2019，Vol.43Issue(5)：1658-1665,8.DOI:10.13335/j.1000-3673.pst.2018.2908
基于频率相关网络等值和时变动态相量直流模型的机电暂态仿真方法
An Electromechanical Transient Simulation Method Based on Frequency-dependent Network Equivalent and Time-varying Dynamic Phasor DC Model
摘要
Abstract
An electromechanical transient simulation method based on frequency-dependent network equivalent and time-varying phasor DC model was put forward, separating DC modeling from electromechanical transient model in buck grid, and a flow chat of whole simulation was given. A little simulation step length based on multi-rate simulation method is used to build the time-varying phasor model of line commutated converter HVDC and voltage source converter HVDC. A method to choose the little step length in DC side is provided to increase simulation accuracy and decrease simulation time for electromagnetic transient calculation. Serial interface between AC and DC sides is iterated following the iteration between algebraic equation and differential equation. When simulating AC system, DC system is represented with frequency-dependent network equivalent. When simulating DC system, AC system is depicted with Norton equivalent. Validity of the proposed method was verified by comparing with electromagnetic transient model in PSCAD and electromechanical transient simulation without time-varying phasors.关键词
频率相关网络等值/直流模型/机电暂态/多速率仿真/大规模电网/接口/时变动态相量Key words
frequency-dependent network equivalent/DC model/electromechanical transient/multi-rate simulation/buck grid/interface/time-varying dynamic phasors分类
信息技术与安全科学引用本文复制引用
丁平,赵敏,田鹏飞,王维熙,徐希望,蔡靖..基于频率相关网络等值和时变动态相量直流模型的机电暂态仿真方法[J].电网技术,2019,43(5):1658-1665,8.基金项目
国家电网公司科技项目(含大容量高频开关设备简化电磁暂态模型的大规模机电暂态仿真方法研究). （含大容量高频开关设备简化电磁暂态模型的大规模机电暂态仿真方法研究）
