[1]仇乐兵,唐建宇,曹 洋,等.基于二阶广义积分器的改进型电网锁相环[J].控制与信息技术(原大功率变流技术),2017,(02):61-67.[doi:10.13889/j.issn.2095-3631.2017.02.200]
 QIU Lebing,TANG Jianyu,CAO Yang,et al.An Improved Phase-locked Loop Based on Second-order Generalized Integrator[J].High Power Converter Technology,2017,(02):61-67.[doi:10.13889/j.issn.2095-3631.2017.02.200]
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基于二阶广义积分器的改进型电网锁相环()
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《控制与信息技术》(原《大功率变流技术》)[ISSN:2095-3631/CN:43-1486/U]

卷:
期数:
2017年02期
页码:
61-67
栏目:
电力系统
出版日期:
2017-04-05

文章信息/Info

Title:
An Improved Phase-locked Loop Based on Second-order Generalized Integrator
文章编号:
2095-3631(2017)02-0051-07
作者:
仇乐兵唐建宇曹 洋罗仁俊徐万良林 丽
(株洲变流技术国家工程研究中心有限公司,湖南株洲 412001)
Author(s):
QIU Lebing TANG Jianyu CAO Yang LUO Renjun XU Wanliang LIN Li
(Zhuzhou National Engineering Research Center of Converters Co., Ltd., Zhuzhou, Hunan 412001, China)
关键词:
二阶广义积分器锁相环频率自适应直流偏置
Keywords:
SOGI PLL frequency adaptive control DC offset
分类号:
TM714
DOI:
10.13889/j.issn.2095-3631.2017.02.200
文献标志码:
A
摘要:
在理想电网电压工况下,单同步参考坐标系锁相环能快速、准确地检测电网电压相位及频率,但非理想电网电压工况会显著恶化单同步锁相环的性能。为此,文章提出一种基于二阶广义积分器的改进型电网锁相环,其通过定积分运算提取直流分量,进而消除直流偏置所造成的相位跟踪误差;通过准确的频率估计与参数调整,使二阶广义积分器的谐振频率能很好地适应电网频率的变化,并对锁相环的稳定裕度、动态响应及抗干扰性等参数进行了优化设计。仿真及实验结果表明,所设计的锁相环在电网电压不对称、畸变、频率变动、直流偏置等工况下均具有良好的锁相性能。
Abstract:
Under ideal grid voltage conditions, single synchronous reference frame phase-locked loop (SSRF-PLL) enables fast and accurate phase/frequency detection, however, abnormal grid voltage conditions highly degrade its performance. To overcome this drawback, it presented an improved PLL based on second-order generalized integrator (SOGI). The extraction of DC component is performed by the definite integral operation, and then the phase error caused by the DC offset can be eliminated. By the accurate estimation of frequency and parameter tuning, the resonance frequency of SOGI is adaptive to the grid frequency variation. The stability margin, dynamics response, and disturbance rejection ability are the critical factors that are considered in parameters optimization. Simulation and experimental results show that the PLL has excellent performance under non-ideal grid voltage conditions including voltage asymmetry, harmonics, frequency varying and DC offset.

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备注/Memo

备注/Memo:
收稿日期:2016-11-22
作者简介:仇乐兵(1985-),男,工程师,研究方向为大功率变流器设计。
基金项目:国家863 计划(编号:2015AA050600)
更新日期/Last Update: 2017-04-26