当前位置>主页 > 期刊在线 > 电子工程 >

电子工程22年22期

基于 PI 与神经网络准 PR 双闭环控制的光伏并网 控制研究
万立宇,刘梁挺,朱煜伟
(安徽理工大学,安徽 淮南 232001)

摘  要:传统的单相并网逆变器采用单一的比例积分(PI)控制器进行控制,虽然结构简单,但是以不变的模式及参数无法实现无静差跟踪,且并网容易产生波动,谐振抑制能力不足。基于此,提出了一种基于 PI 与神经网络准 PR 双闭环控制的单相并网逆变器系统控制策略。设计了 PI 与神经网络准 PR 双闭环控制的控制策略及控制框图,实现入网电流无静差跟踪,与 PI与准 PR 双闭环控制策略进行比较,具有更好的并网电流波形,电流总谐波畸变率有明显下降。最后,通过 MATLAB/Simulink平台搭建了两种并网控制策略的仿真模型,验证了本文提到的控制策略效果更佳。


关键词:PI 控制器;神经网络准 PR;无静差跟踪;谐振抑制



DOI:10.19850/j.cnki.2096-4706.2022.22.009


中图分类号:TP18;TM464                                文献标识码:A                                  文章编号:2096-4706(2022)22-0038-05


Photovoltaic Grid-connected Control Research Based on PI and Neural Network Quasi-PR Double Closed-loop Control

WAN Liyu, LIU Liangting, ZHU Yuwei

(Anhui University of Science and Technology, Huainan 232001, China)

Abstract: The traditional single-phase grid-connected inverter adopts a single proportional integration (PI) controller for control, the structure is simple, but the unchanged mode and parameters can not achieve tracking without static error, and the grid connection is easy to produce fluctuations, resonance suppression ability is insufficient. Based on this, a single-phase grid-connected inverter system control strategy based on PI and neural network quasi-PR double closed-loop control is proposed. The control strategy and control block diagram for the PI and neural network quasi-PR double closed-loop control are designed to achieve tracking without static error of incoming current, compared with PI and quasi-PR double closed-loop control strategy, which has a better grid-connected current waveform, and the total harmonic distortion rate of the current is significantly reduced. Finally, a simulation model of two grid-connected control strategies is built through the MATLAB/Simulink platform, which verifies that the control strategies mentioned in this paper have better effect.

Keywords: PI controller; neural network quasi-PR; tracking without static error; resonance suppression


参考文献:

[1] 胡家喜,虞佳兴,李圣清,等 . 基于 PI 与 QPR 双闭环控制的光伏并网系统控制策略 [J]. 电工技术,2021(18):74-77+80.

[2] 曾明,李桂梅,严勇,等 . 基于准 PR 与 PI 复合控制的带直流前馈的 LCL 型单相光伏并网电流优化 [J]. 湖南师范大学自然科学学报,2020,43(6):80-86.

[3] 王秀云,毛瑞鹏,田壁源,等 . 基于 PI 与准 PR 联合控制的光伏并网电流优化 [J]. 电力系统保护与控制,2017,45(7):121-125.

[4] 张赛鹏,郭荣欢,刘赫 . 基于 PI 与准 PR 调节的并网逆变器控制参数设计 [J]. 黑龙江电力,2017,39(1):40-44+84.

[5] 范宝奇,罗晓曙,廖志贤,等 . 神经网络准 PR 光伏并网逆变器控制技术 [J]. 电力系统及其自动化学报,2016,28(3):30-34.

[6] 马永翔,权学红,闫群民,等 . 基于 PI+QPR 控制的单相有源电力滤波器研究 [J]. 电测与仪表 .


作者简介:万立宇(1998.05—),男,汉族,江苏淮安人,硕士研究生在读,研究方向:电力电子技术。