电力系统保护与控制2024，Vol.52Issue(24)：9-19,11.DOI:10.19783/j.cnki.pspc.240202
前置分数阶复数滤波器的电网同步技术
A grid synchronization technique based on a fractional-order complex-coefficient filter
摘要
Abstract
In recent years,the complex coefficient filter(CCF)has received a lot of research attention in grid synchronization technology.However,a CCF-based phase locked loop(PLL)is basically similar to the PLL based on real coefficient filters in terms of mathematical models and dynamic performance.Thus,a three-phase PLL method with a front-up fractional-order CCF is put forward.First,by using fractional-order operators to construct a pre-stage filtering structure,pole assignment is used to determine the order's value range,and it is shown that this structure can precisely separate the grid's fundamental positive-and negative-sequence components.Secondly,linear mathematical modeling is conducted for fractional-order CCF-based PLL.The control performance of the entire PLL system is analyzed,with the third-order least resonance peak correction method being used to set up the controller's parameters.Finally,simulations and comparative experiments are performed.The results show that the proposed PLL can deliver better dynamic indices and quality than the existing CCF-PLL during grid changes.关键词
电网同步/复数滤波器/锁相环/分数阶/动态性能/基波正负序Key words
grid synchronization/complex coefficient filter/phase locked loop/fractional-order/dynamic performance/fundamental positive-and negative-sequence components引用本文复制引用
何宇,漆汉宏,张迪,周道龙,邓小龙..前置分数阶复数滤波器的电网同步技术[J].电力系统保护与控制,2024,52(24):9-19,11.基金项目
This work is supported by the National Natural Science Foundation of China(No.61573193). 国家自然科学基金项目资助(61573193) （No.61573193）
河北省自然科学基金项目资助(E2019203297) （E2019203297）
江苏省高职院校教师访学研修项目资助(2024TDFX003) （2024TDFX003）
江苏省高校"青蓝工程"项目资助 （）
江苏信息职业技术学院科研课题(JSITKY 202302) （JSITKY 202302）
