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A 24‐hour operational single‐phase quasi‐Z‐source photovoltaic power system
International Journal of Circuit Theory and Applications ( IF 1.8 ) Pub Date : 2021-01-19 , DOI: 10.1002/cta.2947 Xianglin Wei 1, 2 , Yushan Liu 3 , Han Wang 4 , Wanhong Zhang 5 , Wei Chen 2 , Weiman Yang 2 , Surong Huang 1
International Journal of Circuit Theory and Applications ( IF 1.8 ) Pub Date : 2021-01-19 , DOI: 10.1002/cta.2947 Xianglin Wei 1, 2 , Yushan Liu 3 , Han Wang 4 , Wanhong Zhang 5 , Wei Chen 2 , Weiman Yang 2 , Surong Huang 1
Affiliation
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Battery energy stored single‐phase quasi‐Z‐source inverter photovoltaic (BES‐qZSI‐PV) power system shows many advantages in comparison with other tri‐port inverter‐based PV power systems. However, the existing BES‐qZSI‐PV power system does not work at night or cloudy day because of its circuit limitation. This paper proposes a 24‐h operational BES‐qZS‐PV system by the following approaches: (1) the main power circuit is proposed for the day and night operation; (2) the detailed circuit models including the DC model and the second‐harmonics ripple model are built by considering scenarios of day and night operations; (3) the design method of quasi‐Z‐source network parameters is proposed to meet the requirement of day and night operations; and (4) the control strategy is proposed to achieve the high‐performance system operation all the time and seamless transition between day and night operation. After theoretical modeling and analysis, the built models are verified by comparing their calculation results with the circuit‐based simulation and experimental results. The proposed single‐phase BES‐qZSI‐PV power system is tested; experimental and simulation results are captured when the system operates in day, night, and transition to validate the proposed 24‐h operational BES‐qZSI‐PV system.
中文翻译：
24小时运行的单相准Z源光伏发电系统
与其他基于三端口逆变器的光伏发电系统相比，电池储能单相准Z源逆变器光伏发电（BES-qZSI-PV）电力系统显示出许多优势。但是，由于其电路限制，现有的BES-qZSI-PV电源系统无法在夜间或阴天工作。本文通过以下方法提出了一种24小时可运行的BES-qZS-PV系统：（1）提出了白天和晚上运行的主电源电路；（2）通过考虑白天和黑夜的工作场景，建立了包括直流模型和二次谐波纹波模型在内的详细电路模型；（3）提出了准Z源网络参数的设计方法，以满足昼夜运行的要求。（4）提出了控制策略，以始终实现高性能的系统运行，并实现昼夜运行之间的无缝过渡。经过理论建模和分析后，通过将构建模型的计算结果与基于电路的仿真和实验结果进行比较，对构建模型进行了验证。建议的单相BES-qZSI-PV电源系统已经过测试；当系统在白天，夜晚和过渡期间运行时，将捕获实验和仿真结果，以验证建议的24小时可运行的BES-qZSI-PV系统。
更新日期：2021-03-17
中文翻译：
24小时运行的单相准Z源光伏发电系统
与其他基于三端口逆变器的光伏发电系统相比，电池储能单相准Z源逆变器光伏发电（BES-qZSI-PV）电力系统显示出许多优势。但是，由于其电路限制，现有的BES-qZSI-PV电源系统无法在夜间或阴天工作。本文通过以下方法提出了一种24小时可运行的BES-qZS-PV系统：（1）提出了白天和晚上运行的主电源电路；（2）通过考虑白天和黑夜的工作场景，建立了包括直流模型和二次谐波纹波模型在内的详细电路模型；（3）提出了准Z源网络参数的设计方法，以满足昼夜运行的要求。（4）提出了控制策略，以始终实现高性能的系统运行，并实现昼夜运行之间的无缝过渡。经过理论建模和分析后，通过将构建模型的计算结果与基于电路的仿真和实验结果进行比较，对构建模型进行了验证。建议的单相BES-qZSI-PV电源系统已经过测试；当系统在白天，夜晚和过渡期间运行时，将捕获实验和仿真结果，以验证建议的24小时可运行的BES-qZSI-PV系统。
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