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Control of solar photovoltaic integrated UPQC operating in polluted utility conditions

机译:在受污染的公用事业条件下运行的太阳能光伏集成式UPQC的控制

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摘要

This study proposes a control approach based on second-order generalised integrator (SOGI) and delayed signal cancellation (DSC) for improved control of single-phase two-stage solar photovoltaic array integrated unified power quality conditioner (UPQC-SPV). The SPV array is integrated to the DC link of UPQC-SPV through a simple boost converter. The boost converter is controlled using a maximum power point tracking algorithm to operate SPV array at its peak power point. The series compensator control is based on extraction of point of common coupling voltage template using two cascaded SOGI (CSOGI) band-pass filter. The shunt compensator control is based on extraction on fundamental load current. As the load current is highly non-linear, a combination of CSOGI and DSC is used to extract fundamental active component of load current, from which the reference signal for shunt compensator is generated. This approach allows good accuracy in extraction of fundamental component of load current without sacrificing the dynamic performance. The performance of UPQC-SPV is verified experimentally on a prototype developed in the laboratory under dynamic conditions such as load change, voltage sags/swells and irradiation variation.
机译:这项研究提出了一种基于二阶广义积分器(SOGI)和延迟信号消除(DSC)的控制方法,以改善对单相两级太阳能光伏阵列集成统一电能质量调节器(UPQC-SPV)的控制。 SPV阵列通过一个简单的升压转换器集成到UPQC-SPV的DC链路。使用最大功率点跟踪算法控制升压转换器,以在其峰值功率点上运行SPV阵列。串联补偿器控制基于使用两个级联SOGI(CSOGI)带通滤波器提取的公共耦合电压模板的点。并联补偿器控制基于对基本负载电流的提取。由于负载电流是高度非线性的,因此使用CSOGI和DSC的组合来提取负载电流的基本有源分量,并从中生成分流补偿器的参考信号。这种方法在不牺牲动态性能的情况下,可以在提取负载电流的基本成分时提供良好的精度。 UPQC-SPV的性能已在实验室动态条件下(例如负载变化,电压骤降/骤升和辐射变化)开发的原型上进行了实验验证。

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