基于电压电流双环控制的蓄电池并网研究

doi:10.16180/j.cnki.issn1007-7820.2023.02.003

摘要/Abstract

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。

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

Abstract:

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.

Key words: accumulator, constant current charge and discharge, bidirectional conversion circuit, SVPWM, closed-loop control, MATLAB simulation, filter, inverter

中图分类号:

TP273

孙思男,郝正航. 基于电压电流双环控制的蓄电池并网研究[J]. 电子科技, 2023, 36(2): 13-21.

SUN Sinan,HAO Zhenghang. Research on Battery Grid Connection Based on Voltage and Current Double Loop Control[J]. Electronic Science and Technology, 2023, 36(2): 13-21.

图/表 24

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表1

铅酸蓄电池内部参数取值情况"

电池容量参数	参考电气等效主支路的参数	参考电等效物的寄生反应分支的参数	参考电池热模型的参数
I^=49 A $C 0 $ =261.9 Ah K_c=1.18 θ_f=-40 ℃ ε=1.29 δ=1.40	τ=5 000 s E_m₀=2.135 V K_E=0.580×10^-3V·℃^-1 R₀₀=2.0 mΩ R₁₀=0.7 mΩ R₂₀=15 mΩ A₀=-0.30 A₂₁=-8.0 A₂₂=-8.45	V_P₀=0.1 V G_P₀=2 pS A_P=2.0	C_θ= 15 Wh·℃^-1 R_θ= 0.2 ℃·W^-1

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