基于PSS/E和PSCAD/EMTDC联合仿真的交直流系统混合仿真研究

机电—电磁联合仿真技术兼顾机电暂态仿真和电磁暂态仿真二者优点,可应用于交直流输电系统仿真研究中,基于PSS/E与PSCAD/EMTDC联合仿真技术,对南方电网进行直流系统电磁暂态建模及交流系统机电暂态建模,并进行实例仿真研究,通过不同仿真工具的仿真曲线对比分析,说明机电—电磁混合仿真技术的优越性。研究结果表明,机电—电磁混合仿真与机电暂态仿真整体上系统响应趋势近似,在故障期间及故障恢复初期直流响应特性上还存在一定的差异性,机电—电磁联合仿真技术能更精确地体现多次换相失败及换相失败后直流系统恢复的过程,对交直流输电系统仿真研究具有较强的适用性。

Hybrid Simulation Research on AC/DC System Based on PSS/E and PSCAD/EMTDC Co-simulation

Electromechanical and electromagnetic hybrid simulation technology takes into account the advantages of electromechanical transient simulation and electromagnetic transient simulation,and can be applied to AC/DC transmission system simulation research.In this paper,based on simulation platform of PSS/E and PSCAD/EMTDC,electromagnetic transient model of HVDC system and electromechanical transient model of AC system for China Southern Power Grid are established,and simulation analysis is carried out.Through the comparative analysis curves of different simulation tools are given,the advantages of electromechanical-electromagnetic hybrid simulation technology are illustrated by contrast analysis.The research results show that the electromechanical-electromagnetic hybrid simulation and electromechanical transient simulation have similar system response trend,but there are some differences in response characteristics of HVDC system during the fault period and the early stage of fault recovery.The electromechanical-electromagnetic hybrid simulation technology can more accurately reflect the process of HVDC system recovery after commutation failures.The hybrid simulation technology has strong applicability in simulation analysis of AC/DC transmission system.