电磁-机电暂态混合仿真误差传递机理分析

电磁与机电暂态仿真在模型处理、积分步长和计算模式等方面存在的诸多差异使得通过接口结合的电磁 机电混合仿真存在不可忽视的固有误差，从而限制了其广泛应用。分别从电磁、机电暂态计算交互信息提取误差与接口交互误差两个方面分析了混合仿真中的误差传递机理，其中交互信息提取误差包括瞬时值转相量提取误差、相量转瞬时值离散误差及接口等值阻抗计算误差，接口交互误差包括时序交互误差、数据传输延时误差及机电暂态计算迭代误差。最后，通过基于PSCAD+C的电磁 机电混合仿真平台对上述接口误差机理分析结论给予验证，理论分析与仿真结果表明，相量提取算法、交互步长及数据传输延时是影响混合仿真精度的关键因素.

Analysis on Error Mechanism for Electromagnetic Electromechanical

The differences in modeling, integration step, calculation mode make unavoidable error for electromagnetic electromechnical transient simulation.In this paper, the mechanism of information extraction error and interface interaction error of electromagnetic electromechanical hybrid simulation are analyzed.The information extration error inculdes phasor extraction error, phasor discretization to instantaneous value error and interface equivalent impedance calculation error.The interface interactive error includes timing sequence interaction error, data transmission delay error and iteration error of electromechanical transient programme.In the end, the conclusion is evaluated on a simulation platform based on PSCAD plus C.The theory analysis and simulation suggests that phasor extraction algorithm, integration step and data transmission delay are key factors which influence simulation accuracy.