共查询到19条相似文献,搜索用时 187 毫秒
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卫星电源分系统的联合仿真 总被引:2,自引:0,他引:2
卫星电源分系统的仿真涉及多学科领域,依靠传统的单领域、电路级仿真会在元件建模与算法控制之间产生矛盾.为解决元件模型与算法控制的有机统一问题,利用多领域动态系统仿真软件VTB建立卫星电源分系统的模型,并调用Matlab/Simulink中搭建蓄电池充电控制模块,在VTB中实现联合仿真.仿真结果表明:锂离子蓄电池组实现了恒流恒压充电,母线电压始终调节在28V,太阳电池阵和蓄电池组的功率、电流、电压输出都符合在轨卫星的供电要求,基于VTB与Simulink的联合仿真适用于卫星电源分系统的仿真. 相似文献
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给出两种分流调节方法S3R(sequential switching shunt regulator)和S4R(sequential switching shunt series regulator)的系统结构及拓扑.对S3R的调节过程进行分析,给出滞环比较环节中各参考电压的确定方法;对S4R拓扑中的负载优先原则的实现过程及各开关管的控制逻辑进行了分析.给出S3R的仿真波形,S4R在轻载下的负载总线及蓄电池充电总线仿真波形,以及重载条件下负载和蓄电池充电总线的仿真波形.仿真结果表明这两种拓扑能有效地将负载电压稳定在要求的范围内,对于S4R采用分流调节方式向蓄电池充电,有效减少充电单元的重量,降低成本,提高效率. 相似文献
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研究太阳能路灯系统,针对太阳能路灯安全性和寿命问题,传统铅酸蓄电池不能很好解决光伏最大功率跟踪控制与蓄电池的合理充放电之间的矛盾,导致太阳能路灯系统提前损坏,寿命缩短.为了有效延长太阳能路灯系统寿命,提出一种基于超级电容的光伏系统设计方法.将超级电容连接在光伏系统的前端,在光照不足的情况下,采取超级电容为蓄电池的充电控制策略,从而减少光照变化对充电条件的影响,可保证光伏电池获得最大功率跟踪的,蓄电池的合理充放电要求得到满足.在Matlab上仿真建模,进行了仿真,实验结果表明,提出的方法解决了传统方法的不足,有效的延长了太阳能路灯系统寿命,提高了使用效率. 相似文献
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介绍了目前常用充电终止控制方法的优缺点,以马斯定律和镍镉、镍氢电池充电特性为基础,使用模糊控制技术对快速充电过程进行智能控制。以XC164CM单片机为控制核心,设计了一种针对镍镉、镍氢电池的数字化智能充电系统。实验结果表明,充电电流较好的跟随了马斯定律给出的可接受的最佳充电曲线,从而提高了充电效率并且有效的防止了电池过充电,实现了高效、快速、安全充电。 相似文献
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基于68HC08 MCU设计了蓄电池的充放电电路,并结合芯片UC3845设计了可实现蓄电池分阶段充电的充电电路,提出了基于单片机和PWM芯片的充放电控制策略.实验结果表明,该系统很好地实现了蓄电池充放电控制及充电器的分阶段充电控制功能. 相似文献
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S3R&S4R控制策略分析及仿真 总被引:1,自引:0,他引:1
给出两种分流调节方法S3R(sequential switching shunt regulator)和S4R(sequential switching shunt series regulator)的系统结构及拓扑。对S3R的调节过程进行分析,给出滞环比较环节中各参考电压的确定方法;对S4R拓扑中的负载优先原则的实现过程及各开关管的控制逻辑进行了分析。给出S3R的仿真波形,S4R在轻载下的负载总线及蓄电池充电总线仿真波形,以及重载条件下负载和蓄电池充电总线的仿真波形。仿真结果表明这两种拓扑能有效地将负载电压稳定在要求的范围内,对于S4R采用分流调节方式向蓄电池充电,有效减少充电单元的重量,降低成本,提高效率。 相似文献
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为了准确估算锂电池的荷电状态(SOC),对其等效电路模型进行了研究。通过充放电实验研究锂电池的电特性,利用充放电电压、电流数据辨识其欧姆内阻、极化内阻和极化电容参数,建立了较为精确的锂电池Thevenin模型。建立实验用磷酸铁锂电池的离散状态空间模型,在Matlab/Simulink环境下建立了该电池的仿真模型,并设计了放电实验。实验证明,建立的锂电池模型仿真数据与实测数据误差小于0.1 V,且随着充放电的进行误差逐渐减小,较好的跟随电池电压的变化,模型精度较高。 相似文献
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This paper investigates the use of fuzzy logic control together with Genetic Algorithm (GA) to tune corresponding membership functions in a pulse width modulation voltage (PWM)-based converter for battery charging. For quick charging purposes, a current-charging mode is built on the charging battery series with small impedance resistance. Once the rechargeable battery voltage reaches the preset output voltage value during the current-charging mode, constant voltage-charging mode should take to do the battery charging. No matter what you use a voltage/current mode for battery charging, the PWM converter with tuning duty cycle is necessary to obtain various output voltages to charge battery. The proposed pulse width modulation (PWM) control strategy based on fuzzy logic systems is applied to charge batteries for buck converter. A simulation is proposed to illustrate the efficiency of the design proposed in this paper. 相似文献
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This study presents a battery fast-charging mechanism for an intelligent generic photovoltaic (PV) system and also a pulse-charging method for the on-line temperature compensation. The fuzzy logic control (FLC) is adopted for fast maximum power point tracking (MPPT) of the PV system. Along with proposed battery charging algorithms, the controller presented in this study is named a fuzzy battery-managing controller (FBMC). The fast battery charging by this controller does not only prolong battery lifetime by restoring the maximum battery state of charge (SOC) in the shortest time but also with the temperature compensation. The designed charging algorithm consists of three different stages, namely constant current (CC), pulse charging and trickle charging. In the CC mode, the current at maximum power of the PV array is used for fast charging. The pulse charging mode is next adopted to contain temperature rise while maintaining relatively fast charging speed. To prevent battery damage by charging as battery capacity is close to its full status, 100 % SOC, the float charging mode is finally activated by further decreasing charging currents. Simulations are conducted via Powersim to validate the FBMC performance and the PV system model. The FBMC is next implemented by a DSP module (TMS320F2812) in order to adjust the switching duty cycle during operations of the buck converter. Finally, experimental results were compared with a general constant current and/or voltage method. The results show favorable performance of the propose charging method. 相似文献
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《Control Engineering Practice》2006,14(3):267-275
A state of charge estimator for rechargeable batteries that operate under variable and repetitive charging and discharging conditions is proposed. The estimator is based on a state-space dynamic model of the battery which is obtained by modelling the kinetic of reactions and the diffusion phenomena. By using the terminal current and voltage measurements, an extended Kalman filter estimates the concentrations of the main chemical species which are averaged on the thickness of the active material in order to obtain the state of charge of the battery. The estimator is tested on experimental data derived from typical operating conditions of Nickel–Metal Hydride batteries used in automotive hybrid vehicles. 相似文献
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基于模糊神经网络控制的镍氢电池智能充电 总被引:1,自引:0,他引:1
镍氢蓄电池是具有复杂性和离散性的非线性系统,为其所建的数学模型或者不准确或者太复杂,现有的镍氢蓄电池充电技术一直不太完善,严重地影响了充电速度与质量。针对这一问题,将神经网络与模糊控制相结合,设计了模糊神经网络控制器,用于对MH-Ni蓄电池进行智能充电。通过Matlab仿真,发现充电过程中电压变化平稳,充电时间短,达到了控制要求。 相似文献
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基于飞思卡尔MC9S12XS128型16位MCU和DC/DC变换器,研制成功了太阳能电动小车的充电控制器;文章详细阐述了充电器的硬件实现方法,对车载光伏充电系统中的MPPT策略以及蓄电池充电策略作了深入探讨,提出了一种基于MPPT跟踪算法的蓄电池简化充电策略;实验证实了该太阳能充电器的可行性,该系统能够有效地判断蓄电池的充电状态,并能执行设定的充电策略,能够实现对太阳能最大功率点的跟踪,达到了预期目的。 相似文献
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介绍了蓄电池充放电模型,研究了单相PWM双向充放电原理并建立了相应状态空间模型,在此基础上提出了以蓄电池电流,蓄电池电压、电网侧电流为控制量的控制策略,并通过仿真进行了原理验证,系统能够实现能量双向流动. 相似文献