Islanding Operation among Solar Hybrid System and Grid-tied PV System in Buildings

Piyadanai Pachanapan, Phisut Apichayakul, Akaraphunt Vongkunghae, Sarintip Tantanee

Abstract


The solar hybrid system which consists of photovoltaic (PV) and battery storage can provide electricity supply to the buildings both on-grid and off-grid conditions. To improve the uninterrupted operation, it is possible to integrate the grid-tied PV system, without the battery, with the solar hybrid system to enhance the power generation during islanding condition. However, many hybrid on/off grid inverters do not allow the other energy sources to charge the battery in the off-grid mode. A particular power curtailment control is then required for the grid-tied inverter to prevent the excessive power. In this work, the power curtailment controller with the combination of smart meter and solar irradiance sensor is introduced. The set-point of grid-tied inverter is automatically adjusted following the changes of load consumption and PV power. The performance of islanding operation among solar hybrid and grid-tied PV systems is examined based on a time-sweep power flow calculation on DIgSILENT PowerFactory software. It is shown that instead of using solar hybrid system alone, coupling with the grid-tied PV system can help increasing the efficiency of battery usage. Hence, this can extend the continued electricity supply to the building during the loss of grid voltage.

Keywords


Grid-tied inverter; Hybrid inverter; Islanding operation; Power curtailment; Solar hybrid system

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References


Sadeghian H. and Z. Wang. 2018. Decentralized demand side management with rooftop PV in residential distribution network. In 2018 IEEE Power & Energy Society Innovative Smart Grid Technologies Conference (ISGT), Washington, DC, pp. 1-5.

Johnston D., 2013. Islanding Operation of Electrical Systems in Buildings. Energy and Power Engineering 5(4B): 198-201.

MPP Solar Inc. , User Manual: MPI Hybrid 10 kW PV Inverter.

Goqo Z. and I.E. Davidson. 2018. A Review of Grid Tied PV Generation on LV Distribution Networks. In 2018 IEEE PES/IAS PowerAfrica, pp. 907-912.

Seuss J., Reno M.J., Lave M., Broderick R.J. and Grijalva S., 2016. Advanced inverter controls to dispatch distributed PV systems. In IEEE 43rd Photovoltaic Specialists Conference (PVSC), pp. 1387-1392.

Oureilidis K.O., Bakirtzis E.A. and Demoulias C.S., 2016. Frequency-based control of islanded microgrid with renewable energy sources and energy storage. Journal of Modern Power Systems and Clean Energy 4(1): 54-62.

GoodWe Technologies Co. Ltd. Smart DT (SDT) Series Solar Inverter. [Online serial], Retrieved September 1, 2021 from the World Wide Web: https://en.goodwe.com/sdt-g2-series-three-phase-commercial-rooftop-solar-inverter.

Benabderrazik A. Power limitation and zero export. Elum Energy. [Online serial], Retrieved May 14, 2021 from the World Wide Web: https://elum-energy.com/en/2020/12/22/power-limitation-and-zero-export/.

Zhang Z., Mishra Y., Dou C., Yue D., Zhang B. and Tian Y.-C., 2020. Steady-state voltage regulation with reduced photovoltaic power curtailment. IEEE Journal of Photovoltaics 10(6): 1853-1863.

Azzolini J.A., Reno M.J., Gurule N.S. and Horowitz K.A.W., 2021. Evaluating distributed PV curtailment using quasi-static time-series simulations. IEEE Open Access Journal of Power and Energy 8: 365-376.

Bolgaryn R., Wang Z., Scheidler A., and Braun M., 2021. Active power curtailment in power system planning. IEEE Open Access Journal of Power and Energy 8: 399-408.

Qi J. and T. Tsuji. 2017. Frequency control in microgrid based on inertial response of wind turbine and curtailment of photovoltaic generation. In 2017 IEEE Manchester PowerTech , pp. 1-6.

Qi G., Chen A., and Chen J., 2017. Improved control strategy of interlinking converters with synchronous generator characteristic in islanded hybrid AC/DC microgrid. CPSS Transactions on Power Electronics and Applications 2(2): 149-158.

Naderi Y., Sims R., Coffele F. and Xu L., 2020. Active power quality management in smart microgrids. In CIRED 2020 Berlin Workshop (CIRED 2020): 262-265.

Dou X., Xu P., Hu Q., Sheng W., Quan X., Wu Z., and Xu B., 2018. A Distributed Voltage Control Strategy for Multi-Microgrid Active Distribution Networks Considering Economy and Response Speed. IEEE Access, vol. 6, pp. 31259-31268.

Schneider K.P., Laval S., Hansen J., Melton R. B., Ponder L., Fox L., Hart J., Hambrick J., Buckner M., Baggu M., Prabakar K., Manjrekar M., Essakiappan S., Tolbert L. M. and Liu Y. and Dong J., Zhu L., Smallwood A., Jayantilal A., Irwin C. and Yuan G., 2019. A Distributed Power System Control Architecture for Improved Distribution System Resiliency. IEEE Access, vol. 7, pp. 9957-9970.

De Araujo L.S., Alonso A.M.D.S., and Brandao D.I., 2020. Decentralized control of voltage- and current-controlled converters based on AC bus signaling for autonomous microgrids. IEEE Access, 8: 202075-202089.

Hou X., Sun Y., Lu J., Zhang X., Koh L. H., Su M. and Guerrero J. M., 2018. Distributed Hierarchical Control of AC Microgrid Operating in Grid-Connected, Islanded and Their Transition Modes. IEEE Access, vol. 6, pp. 77388-77401.

Dobos A.P., 2014. Technical report the PVWATTs version 5 manual. National Renewable Energy Laboratory (NREL) of U.S. p.1 – 123.

Mastervolt. Charging batteries. [Online serial], Retrieved May 14, 2021 from the World Wide Web: https://www.mastervolt.com/charging-batteries/#:~:text=Charge%20current,to%20the%2015%2D25%20%25