摘要详情

ID / 提交时间

364 / 2021-11-10 17:33:52

标题

Low-Frequency Oscillation Analysis and Suppression Based on Improved PLL Structure for Vehicle-Grid System of High-speed Railways

关键字

train-network systems, PLL, impedance measurement, low-frequency oscillation stability

主题及专题

Power electronics technology and application > Modeling, simulation and control in power electronics

状态

终稿

作者

炜璐张 / Southwest Jiaotong University

祥宇孟 / Southwest Jiaotong University

摘要

Recently, the low-frequency oscillation (LFO) has occurred frequently in vehicle-grid system of high-speed railways. In this paper, the phase-locked loop (PLL) structure is enhanced to restrain the LFO of the vehicle-grid system, and the impedance mathematical model of the vehicle-grid system based on the improved PLL is bulit. Furthermore, the effectiveness of the improved PLL in suppressing the LFO is verified based on the generalized Nyquist stability criterion and the Starsim-based hardware-in-loop (HIL) platform. In addition, an improved impedance measurement method for single-phase systems is proposed to verify the effectiveness of the impedance mathematical model of rectifier after the improvement of PLL. Compared with the previous dq impedance measuring method, the proposed method can effectively reduce the times of disturbance injection, simplifying the measurement procedure.

重要日期

会议日期

07月11日

2023

至

08月18日

2023
11月10日 2021

初稿截稿日期
12月10日 2021

注册截止日期
12月11日 2021

报告提交截止日期

主办单位

IEEE IAS

承办单位

IEEE IAS Student Chapter of Southwest Jiaotong University (SWJTU)
IEEE IAS Student Chapter of Huazhong University of Science and Technology (HUST)
IEEE PELS (Power Electronics Society) Student Chapter of HUST