电磁–机电暂态混合仿真精度改善技术研究

Research on Accuracy Improvement Technology for Electromagnetic-electrometrical Transient Hybrid Simulation

故障期间和故障后电磁–机电暂态混合仿真结果与全电磁暂态仿真结果的差异性制约了混合仿真的应用,为了进一步提高混合仿真的仿真精度,研究了混合仿真接口精度改善技术。首先,分析了接口交互误差产生机理;然后提出了3种针对接口交互误差的仿真精度改善技术,分别为变步长交互、戴维南电动势外推预估和戴维南电动势一阶保持;最后,基于PSCAD+C的电磁–机电暂态混合仿真平台对所提出的3种精度改善技术进行了效果和可行性验证。仿真结果表明上述精度改善技术均有良好的精度提高作用。

Differences between the results of electromagnetic-electrometrical transient hybrid simulation and those lectromagnetic transient simulation during and after the fault restrict application of hybrid simulaimprove simulation accuracy of hybrid simulation, this paper studies accuracy improvement technology for hybrid simulation interface. It firstly analyzes mechanism of production for interface interactive error, improvement technologies for the interactive error including variable step interaction, Thevenin electromotive force extrap-olation estimation and Thevenin electromotive first order holding. Finally, it verifies effects and feastechnologies based on PSCAD ＋ C electromagnetic-electrometrical transient hybrid simulation platform. Results indicate that these technologies all have favorable improvement effects.