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基于光伏发电系统的物理模型研究,在matlab/simulink中开发了包含光伏阵列模型、光伏阵列的最大功率跟踪(MPPT)模块、DC/DC升压电路和采用电压及电流环控制的逆变系统在内的动态仿真模型,并建立了基于电压型逆变器的暂态数学模型;并通过仿真得到了并网光伏发电系统辐射强度突变和发生短路时的暂态运行特性,为深入研究并网光伏发电系统的暂态特性建立了基础。 相似文献
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光伏发电及风力发电系统中铅蓄电池的建模 总被引:1,自引:0,他引:1
阐述了独立的光伏发电及风力发电系统中常用的铅蓄电池模型,特别提出了谢菲尔德模型,费西纳里模型及ITE模型,对各模型进行了比较并指出其尚存在的问题。 相似文献
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轨道交通是目前重要的交通方式,为了保证轨道交通运行的可靠性,分析光伏发电系统在轨道交通中的应用,通过建立光伏系统数学模型,阐述最大功率点算法,并使用PSCAD/EMTDC仿真软件建模,重点分析了光伏发电系统的输出与光照强度和电池温度之间的关系。 相似文献
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针对双面光伏组件建立一种耦合模型,可用于模拟双面光伏组件在实际运行过程中的输出特性。采用视角系数法建立便于模拟背面辐照度的二维辐照度模型,提出一种简化计算方法来求解七参数电学模型,并根据能量守恒的非稳态热学模型来估计电池温度。之后通过输入参数的传递,对耦合模型进行求解,并通过实验数据验证模型的准确性。结果表明:辐照度模型可对不同天气条件下双面光伏组件辐照度进行模拟,晴天时更准确,均方根误差仅为6.9%;采用简化方法求解的七参数电学模型,求解结果与实测值较吻合,在最大功率处的功率偏差仅为0.4 W;所建立的耦合模型可对双面光伏组件单日输出功率及年度发电性能进行评估,模拟结果与实测数据吻合较好。 相似文献
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A number of photovoltaic (PV) performance-analysis models are tested for their ability to estimate the AC power output and validated against historical observations from a PV test facility. A method to estimate meteorological parameters is developed for use in PV performance models for predicting future AC power output from a PV test site. Twelve such PV performance models are examined, and the PVFORM system analysis program and lifetime cost and performance models are extensively tested. These two models are tested using the typical meteorological year and the VPI model-generated estimates of long-term data. Performance prediction results are compared against actual observations at a 4 kW PV test facility. Results show that the VPI model-generated data, when used with the PVFORM model, provide the best predictions for AC power output from this 4 kW PV test facility 相似文献
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A. Garrigós J.M. BlanesJ. Rubiato E. ÁvilaC.G. García J.L. Lizán 《International Journal of Hydrogen Energy》2010
This paper describes a photovoltaic power regulator aimed for photovoltaic stand-alone hydrogen-backup power systems. The main characteristics of the regulator are the following; it employs a modular approach where each power cell has three ports, one input and two outputs, the input port is connected to a photovoltaic source while the two output ports are connected to a battery and to an electrolyser, respectively. A second characteristic is that the proposed regulator is driven sequentially, minimising the regulator losses. The operation and features of the photovoltaic regulator are presented and analyzed. Design guidelines are suggested and experimental validation is also given for a 2 kW prototype. 相似文献
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为了准确计算光伏系统的输出功率和估计年平均发电量,以提高光伏并网发电系统的供电安全性和稳定性,文章提出一种基于全时段模拟积分的光伏系统输出功率计算方法。根据光伏发电系统的结构和工作原理对光伏发电子阵列进行了建模,对无法直接获得环境参数地区的温度及光辐射量进行了全时段模拟,提出了光伏发电系统输出功率计算方法;对功率积分后可以估算任意太阳辐射量、环境温度和系统结构下的光伏发电系统年均发电量。通过与实际光伏电站工程算例的对比表明,利用该方法估算的发电量结果能满足工程实际要求,可为光伏发电系统设计人员和决策人员提供参考。 相似文献
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《可再生能源》2017,(7)
针对现有光伏仿真模型无法执行电网调度指令的问题,提出响应电网调度需求的光伏发电系统建模及运行控制方法。根据不同容量光伏系统组成结构搭建了基于DIg SILENT的适用于不同容量的并网光伏发电系统模型,以光伏发电系统响应电网有功需求时间最小化为期望目标,考虑光伏发电系统出力的随机性,通过调整直流电压控制信号响应电网调度需求,利用控制模块中的有功出力限制满足并网点频率约束条件,采用电导增量法优化了MPPT控制策略。仿真结果表明,在有电网调度需求时构建的模型能够快速地响应电网调度指令,在无调度需求时能够很好地实现最大功率跟踪或限制有功出力以满足并网点频率约束。 相似文献
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This paper presents a novel terminal sliding mode control (TSMC) method for maximum power tracking of photovoltaic (PV) power systems. First, an incremental conductance method is used for maximum power point (MPP) searching. It provides good efficiency under rapidly changing atmospheric conditions, but the accuracy for finding the MPP is highly related to the MPP tracking control. Therefore, a TSMC-based controller is developed to regulate the system to the searched reference MPP. Different from traditional sliding mode control, the developed TSMC assures finite convergence time for the MPP tracking. Furthermore, a common singularity problem that exists in traditional TSMC is removed in this paper. Even if considering uncertainty in the PV power system, the TSMC guarantees high robustness. Finally, several simulations and experiments show the expected control performance. 相似文献
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The recent development of small scale combined heat and power (CHP) systems has provided the opportunity for in-house power backup of residential-scale photovoltaic (PV) arrays. This paper investigates the potential of deploying a distributed network of PV + CHP hybrid systems in order to increase the PV penetration level in the U.S. The temporal distribution of solar flux, electrical and heating requirements for representative U.S. single family residences were analyzed and the results clearly show that hybridizing CHP with PV can enable additional PV deployment above what is possible with a conventional centralized electric generation system. The technical evolution of such PV + CHP hybrid systems was developed from the present (near market) technology through four generations, which enable high utilization rates of both PV-generated electricity and CHP-generated heat. A method to determine the maximum percent of PV-generated electricity on the grid without energy storage was derived and applied to an example area. The results show that a PV + CHP hybrid system not only has the potential to radically reduce energy waste in the status quo electrical and heating systems, but it also enables the share of solar PV to be expanded by about a factor of five. 相似文献