多频段时间尺度变换电磁暂态仿真研究  

A Research on Multi-frequency Band Time-scale Frame Transformation for Electromagnetic Transients Simulation

作　　者：姚蜀军[1] 刘畅[1] 汪燕[1] 韩民晓[1] YAO Shujun;LIU Chang;WANG Yan;HAN Minxiao(North China Electric Power University,Changping District,Beijing 102206,China)

机构地区：[1]华北电力大学

出　　处：《中国电机工程学报》2019年第24期7199-7208,共10页Proceedings of the CSEE

基　　金：国家重点研发计划项目(2016YFB0900600);国家电网公司科技项目(52094017000W)~~

摘　　要：随着高压直流输电、FACTS以及新能源发电等电力电子装置接入电网,电网的结构和运行方式发生了巨大的变化,传统的仿真技术难以适应当今电网的现状。交直流电网中电气信号的宽频特点使得电气信号成为一个多时间尺度融合的信号,该文结合CPU的多核特点,提出基于多频段时间尺度变换的大规模交直流电磁暂态并行仿真方法。多频段时间尺度变换(multi-frequency-bandtimescaleframe transformation,MFB-TSFT)通过在多时间尺度信号的分解和变换之间,创新性的引入尺度重组环节,在提高仿真精度的同时又能增大仿真步长提高仿真速度。经过重组后,可参与并行仿真的子信号个数对比原始分解的个数将大为减小,仅为重组后的组数,如果重组后的子信号是一个低频信号,即可分组实现大步长并行仿真。该文分析MFB-TSFT在电力系统中的可行性,并与现有的DP和SFA进行对比,最后通过算例验证MFB-TSFT的可行性。Since the installation of power electronic devices such as HVDC, flexible AC transmission system(FACTS) and new energy power generation, the structure and operation of the power grid have undergone great changes, the traditional electromagnetic transient simulation(EMTS) is difficult to adapt to the current state of the grid. The frequency-dependent characteristic of the electrical signals in the AC/DC power grid makes the electrical signals become a multi-time scale signal. In this paper, a parallel simulation method of large scale AC/DC electromagnetic transient was proposed based on multi-frequency-band time scale frame transformation(MFB-TSFT). Through the decomposition and transformation of multi-time scale signals, the scale recombination was innovatively introduced to improve the simulation accuracy and increase the simulation step size to improve the simulation speed. After the recombination, the number of sub-signals that can participate in the parallel simulation will be greatly reduced compared with the number of original decomposition, which is only the number of groups after the recombination. If the reconstructed sub-signal is a low-frequency signal, it can be grouped to realize the large-step parallel simulation. In this paper, the applicability and characteristics of this method in electromagnetic transient simulation of power system were analyzed in detail and compared with the existing dynamic phasor method and shift frequency analysis. Finally, an example was given to verify the feasibility and effectiveness of the proposed method.

关 键 词：电磁暂态仿真 多速率 时间尺度变换 多频段时间尺度变换 经验模态分解 

分 类 号：TM71[电气工程—电力系统及自动化]