基于电压电流双环控制的蓄电池并网研究  

Research on Battery Grid Connection Based on Voltage and Current Double Loop Control

作　　者：孙思男 郝正航[1] SUN Sinan;HAO Zhenghang(The Electrical Engineering College,Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州大学电气工程学院,贵州贵阳550025

出　　处：《电子科技》2023年第2期13-21,共9页Electronic Science and Technology

基　　金：国家自然科学基金(51567005)。

摘　　要：针对常规蓄电池放电采用可变电阻器进行性能测试所引起的准确度低、可靠性差、操作困难等问题,文中提出了一种并网充放电的电池性能检测方式。通过对铅酸蓄电池中电荷量、温度、电流微分表达式的分析,建立由主反应支路和寄生支路组成的三阶等效数学模型。电池的充放电采用阶跃信号触发Buck-Boost双向变换电路开关通断的恒流模式。逆变电路采用电压电流双闭环控制,并经电感滤波后并入模拟电网。在MATLAB/Simulink软件上搭建的仿真模型验证结果表明蓄电池各项性能指标和并网电流动态响应良好,证明了文中所提方法的有效性和环保性。In view of problems such as low accuracy,poor reliability,and difficulty in operation caused by the performance test of conventional battery discharge using variable resistors,a battery performance test method for grid-connected charging and discharging is proposed in the present study.Through the analysis of the differential expressions of charge,temperature and current in lead-acid batteries,a third-order equivalent mathematical model composed of the main reaction branch and parasitic branch is established.The charging and discharging of the battery adopts the constant current mode in which the step signal triggers the on-off of the Buck-Boost bidirectional conversion circuit switch.The inverter circuit adopts double closed-loop control of voltage and current,and is merged into the analog power grid after being filtered by inductance.Simulation experiments on MATLAB/Simulink software show that the various performance indicators of the battery and the grid-connected current dynamic response are good,which proves the effectiveness and environmental protection of the proposed method.

关 键 词：蓄电池 恒流充放电 双向变换电路 SVPWM 闭环控制 MATLAB仿真 滤波器 逆变器 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置] TN99[自动化与计算机技术—控制科学与工程]