并网光伏电站汇流箱组串电流的节能控制

发布时间：2018-05-03 23:08

本文选题：并网光伏电站 + 汇流箱　；参考：《电网与清洁能源》2015年11期

【摘要】：并网光伏电站汇流箱组串电流节能控制过程中,采样和计算存在一定的误差,传统的节能控制过程,汇流箱输出电压不准确,实际输出汇流箱组串电流无法准确跟踪指令电流的变化,不能有效实现节能控制。提出一适用于并网光伏电站汇流箱组串电流节能控制方法,将并网光伏电站汇流箱组串指令电流转换成指令电压,并将其当成SPWM的调制波。在输出指令电压中加入一个前馈电压,使得并网光伏电站汇流箱电感两端的电压差含有一个基波分量,依据并网光伏电站汇流箱组串电流控制结果获得隐含层全部节点的正定矩阵,通过cholesky对隐含层的输出矩阵进行分解,基于分解结果获取并网光伏电站汇流箱组串电流节能控制效果最优解。仿真实验结果表明,所提方法在组串电流控制精度和节能方面均具有较好的工作性能。
[Abstract]:There are some errors in sampling and calculation during the energy saving control process of confluence box in grid-connected photovoltaic power station. The output voltage of confluence box is not accurate in the traditional energy saving control process. The actual output confluence box series current can not track the change of instruction current accurately, and can not effectively realize the energy saving control. An energy saving control method for confluence box group of grid-connected photovoltaic power station is proposed. The instruction current of confluence box group of grid-connected photovoltaic power station is converted into instruction voltage and treated as modulation wave of SPWM. A feedforward voltage is added to the output instruction voltage so that the voltage difference between the two ends of the converters of grid-connected photovoltaic power stations contains a fundamental component. The positive definite matrix of all nodes of the hidden layer is obtained according to the current control results of the confluence box of grid-connected photovoltaic power station. The output matrix of the hidden layer is decomposed by cholesky. Based on the decomposition results, the optimal results of energy saving control of confluence box in grid-connected photovoltaic power station are obtained. The simulation results show that the proposed method has good performance in the control accuracy and energy saving.
【作者单位】：无锡职业技术学院物联网技术学院;
【基金】：江苏省前瞻性项目(BY2014024)~~
【分类号】：TM615

【相似文献】