适应新型电力系统的高性能电磁暂态仿真技术及其应用

High-performance Electromagnetic Transient Simulation Technology and Application for New Power System

对于新型电力系统的有效全电磁暂态仿真而言,不仅要提升基础模型的精度和稳定性水平,更面临着万节点级大规模电网的仿真效率和不同时间尺度电力电子系统的计算精度两大挑战。结合所研发的高性能电磁暂态仿真平台,介绍了解决上述挑战的基本思路和实现效果。以同步发电机、传输线和电力电子器件为例,说明重点核心模型的技术突破。基于时域变换大步长电磁暂态算法和高效自动并行技术,实现宽时间尺度大电网高效全电磁仿真,达到数千节点级主网架的超实时仿真和数万节点级电网的高效仿真。利用多速率电磁暂态接口,实现交流大电网及不同时间尺度电力电子系统的空间多速率并行仿真。通过万节点级超大规模电网算例及实际省级和区域电网的故障录波对比,验证了所实现技术的高效率和准确性。

The effective full electromagnetic transient simulation of new power system not only needs to improve the accuracy and stability level of the basic model,but also needs to solve two major problems:the efficiency of simulating large-scale power grid at ten-thousand-bus level and the accuracy of calculating different power electronic systems with different time scales.Based on the developed high-performance electromagnetic transient simulation platform,the basic idea and the effect for solving the above problems are introduced.The synchronous generator,transmission line and power electronic device are used as the examples to demonstrate the technology breakthrough of the key core models.With the efficient automatic parallel technology as well as the time-domain transformation based large-step electromagnetic transient algorithm,the effective full electromagnetic transient simulation of large-scale power grid with wide-range time scale is realized.The hyper-realtime simulation for main network frame at thousand-bus level and the efficient simulation for power grid at ten-thousand-bus level are realized.Through the multi-rate interface of electromagnetic transient simulation,the platform realizes the spatial multi-rate parallel simulation of large AC network and power electronic system with different simulation time scales.The efficiency and accuracy of the proposed technique are verified by using several examples of super-large-scale power grids at the ten-thousand-bus level,as well as the comparison with the field-recorded disturbance waves in a provincial power grid and a regional power grid.