直流微电网光伏控制器模式无缝切换控制策略  

A control strategy for mode seamless switching of DC microgrid PV controller

作　　者：郑雪筠 胡淑慧 张道南 葛启桢 耿鹏 Zheng Xuejun;Hu Shuhui;Zhang Daonan;Ge Qizhen;Geng Peng(Wuhan Institute of Marine Electric Propulsion,Wuhan 430064,China;Dongfeng off-road Vehicle Co.,Ltd.,Wuhan 430056,China;Shandong Shipping Corporation,Qingdao 266034,Shandong,China)

机构地区：[1]武汉船用电力推进装置研究所,武汉430064 [2]东风越野车有限公司,武汉430056 [3]山东海运股份有限公司,山东青岛266034

出　　处：《船电技术》2024年第5期40-44,共5页Marine Electric & Electronic Engineering

摘　　要：为满足直流微电网内各电源协调运行的需要,本文提出了一种新的切换策略,使光伏控制器能够在最大功率跟踪(maximum power point tracking,MPPT)和恒压控制(constant voltage control,CVC)模式之间平稳地运行。在这两种模式下,光伏控制器始终作为电压源被控制,其控制变量均为光伏阵列的输出电压。该方法将MPPT与母线电压调整策略相结合,无需通信,无需改变硬件结构和控制参数,从而保证了光伏控制器在两种模式之间的无缝切换。最后,建立了一个由光伏机组、直流负载和储能组成的基本直流组网系统,对所提出的控制策略进行性能测试。结果表明,与传统控制策略相比,所提出的无缝切换控制策略获得了更好的暂态特性。To satisfy the need for coordinated operation of various power sources in DC microgrid,a new switching strategy that enables PV controllers to operate smoothly between MPPT and CVC modes is proposes.In both modes,the PV controller is always controlled as a voltage source,and its control variable is the output voltage of the PV array.This method combines MPPT with a bus voltage adjustment strategy without the need for communication and without changing the hardware structure or control parameters,thus ensuring that the PV controller switches seamlessly between the two modes.Finally,a basic DC network system consisting of photovoltaic units,DC loads and energy storage is established to test the performance of the proposed control strategy.The results show that the proposed seamless switching control strategy obtains better transient characteristics compared to the traditional control strategy.

关 键 词：光伏控制器 模式无缝切换 直流微网 电压控制 

分 类 号：TM615[电气工程—电力系统及自动化]