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Damped-SOGI-Based Control Algorithm for Solar PV Power Generating System

机译:基于阻尼SOGI的太阳能光伏发电系统控制算法

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摘要

This paper deals with two-stage solar photovoltaic (PV) system with a damped-second-order generalized integrator (SOGI) algorithm. Proposed topology not only integrates the PV energy to the grid, in addition, it provides the load compensation, power factor correction, and harmonics elimination. Therefore, a double stage system is proposed where the first stage is a dc–dc boost converter, which performs the maximum power point tracking by regulating its duty ratio. For extracting maximum power from the PV array, an incremental conductance-based approach is utilized. Moreover, in the next stage, a voltage source converter (VSC) is utilized. To control the VSC, a damped-SOGI algorithm is used. By using a damped-SOGI-based control algorithm, fundamental active components of load currents are extracted for evaluating the reference grid currents. After comparing reference grid currents with sensed grid currents, switching pulses for the grid tied VSC are produced. A prototype of the proposed system is developed in the laboratory and test results are presented for verification of control of solar photovoltaic system.
机译:本文研究了具有阻尼二阶广义积分器(SOGI)算法的两阶段太阳能光伏(PV)系统。拟议的拓扑不仅将PV能量整合到电网,而且还提供负载补偿,功率因数校正和谐波消除。因此,提出了一种双级系统,其中第一级是dc-dc升压转换器,该转换器通过调节其占空比执行最大功率点跟踪。为了从PV阵列中提取最大功率,采用了基于增量电导的方法。此外,在下一阶段,利用电压源转换器(VSC)。为了控制VSC,使用了阻尼SOGI算法。通过使用基于阻尼SOGI的控制算法,可以提取负载电流的基本有效分量,以评估参考电网电流。在将参考电网电流与感测到的电网电流进行比较之后,会产生并网VSC的开关脉冲。在实验室中开发了该系统的原型,并给出了测试结果以验证对太阳能光伏系统的控制。

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