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A novel Z-source boost derived hybrid converter for PV applications
Analog Integrated Circuits and Signal Processing ( IF 1.4 ) Pub Date : 2021-01-25 , DOI: 10.1007/s10470-021-01800-7
S. Jeyasudha , B. Geethalakshmi , Krishnan Saravanan , Raghvendra Kumar , Le Hoang Son , Hoang Viet Long

This paper proposes a novel Z-source boost derived hybrid converter (ZSBDHC) that produces high gain dual output from a single DC input, which is the choice of a solar photovoltaic system. This has multiple advantages as lesser count of switches, high power processing capability and high reliability result in reduction of overall cost. Besides, the prime advantage of this topology is achieving high voltage gain for a low duty ratio. The system transfer function is derived and the stability of the system is studied with the aid of average state model of the converter under continuous conduction mode. The transfer function of the system exhibits the sixth order dynamic characteristics, which is reduced to second order approximation to design the control parameters and to develop the closed loop scheme. To prove the robustness of the ZSBDHC with voltage feedback control, it is examined with line, load regulation and set point variation. Computer simulation is done for the dynamic characteristics of the ZSBDHC. The experimental operation is also demonstrated to validate the simulated results.



中文翻译:

用于光伏应用的新型Z源升压衍生混合转换器

本文提出了一种新颖的Z源升压衍生混合转换器(ZSBDHC),该转换器可从单个DC输入产生高增益双输出,这是太阳能光伏系统的选择。这具有多个优点,因为更少的开关数量,高功率处理能力和高可靠性可降低总体成本。此外,这种拓扑的主要优点是在低占空比下实现了高电压增益。推导了系统传递函数,并在连续导通模式下借助换流器的平均状态模型研究了系统的稳定性。该系统的传递函数具有六阶动态特性,可将其降低为二阶近似值,以设计控制参数并开发闭环方案。为了证明带有电压反馈控制的ZSBDHC的鲁棒性,通过线路,负载调节和设定点变化对其进行了检验。针对ZSBDHC的动态特性进行了计算机仿真。还演示了实验操作以验证模拟结果。

更新日期:2021-01-28
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