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Improved voltage control strategy for photovoltaic grid-connected system based on double-layer coordination control

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Abstract

An improved automatic voltage coordination control strategy (AVCCS) based on automatic voltage control (AVC) and battery energy storage control (BESC) is proposed for photovoltaic grid-connected system (PVGS) to mitigate the voltage fluctuations caused by environmental disturbances. Only AVC is used when small environmental disturbances happen, while BESC is incorporated with AVC to restrain the voltage fluctuations when large disturbances happen. An adjustable parameter determining the allowed amplitudes of voltage fluctuations is introduced to realize the above switching process. A benchmark low voltage distribution system including PVGS is established by using the commercial software DIg SILENT. Simulation results show that the voltage under AVCCS satisfies the IEEE Standard 1547, and the installed battery capacity is also reduced. Meanwhile, the battery’s service life is extended by avoiding frequent charges/discharges in the control process.

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Authors and Affiliations

  1. Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin, 300072, China

    Yan Qi  (戚 艳) & Hongjie Jia  (贾宏杰)

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  1. Yan Qi  (戚 艳)
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  2. Hongjie Jia  (贾宏杰)
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Corresponding author

Correspondence to Hongjie Jia  (贾宏杰).

Additional information

Supported by National Basic Research Program of China (“973” Program, No. 2009CB219701 and No. 2010CB234608), Tianjin Municipal Science and Technology Development Program (No. 09JCZDJC25000) and Specialized Research Fund for Doctor Discipline of Ministry of Education of China (No. 20090032110064).

QI Yan, born in 1986, female, doctorate student.

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Qi, Y., Jia, H. Improved voltage control strategy for photovoltaic grid-connected system based on double-layer coordination control. Trans. Tianjin Univ. 18, 271–278 (2012). https://doi.org/10.1007/s12209-012-1828-0

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  • DOI: https://doi.org/10.1007/s12209-012-1828-0

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