| 摘要: |
| 模块化多电平换流器(Modular Multilevel Converter，MMC)中大量的开关器件给电磁暂态仿真程序(如PSCAD/EMTDC)带来巨大的计算量，使得仿真速度极其缓慢，给仿真研究以及工程设计带来极大的不便。通过进一步推导电容、电感Dommel电磁暂态数值计算方法，得到了电容、电感等值计算中的历史电流源递推公式，使得历史电流源的计算过程中不必再进行支路电流的中间计算，加快了计算速度。基于此历史电流源递推公式建立了MMC电磁暂态快速仿真模型，并在PSCAD/EMTDC中搭建不同端数、不同电平数MMC-HVDC系统，验证了该快速模型的仿真精度和提速效果。 |
| 关键词: 电磁暂态仿真 柔性直流输电 模块化多电平换流器 子模块 戴维南等效电路 |
| DOI：10.1186/s41601-016-0012-2 |
| 投稿时间：2015-03-01修订日期：2015-10-08 |
| 基金项目:国家自然科学基金(U1134205) |
|
| Quick model of MMC in electromagnetic transient simulations |
| ZHOU Yang,CHANG Fei |
| (School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China;School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China) |
| Abstract: |
| Plenty of switching devices in MMC for electromagnetic transient simulation program (e.g., PSCAD/EMTDC) brings a huge amount of calculation which makes the simulation speed very slow, simulation research and engineering design great inconvenient. Through further derivation capacitance and inductance Dommel electromagnetic transient numerical calculation method, history current source recursion formula in the calculation of capacitance and inductance is got, which reduces intermediate computations of branch current and thus speeds up the calculation. Quickly model of MMC electromagnetic transient is built based on the proposed history current source recursive formula, and MMC-HVDC system with different terminals and different levels is set up in the PSCAD/EMTDC, which validates the simulation precision and speed acceleration of the quick model. |
| Key words: electromagnetic transients (EMT) simulation HVDC modular multilevel converter (MMC) sub-module Thévenin equivalent circuit |
