Modelling of Aggregated Power Output of Photovoltaic Power Generation in Consideration of Smoothing Effect of Power Output Fluctuation around Observation Point T. Kato, T. Murase, M. Kurimoto, Y. Manabe and T. Funabashi   2018/04/20

Abstract

High penetration photovoltaic power generation system (PVS) may cause negative impacts on
the frequency control of electric power system. In the impact assessment of high penetration PVS on the system frequency, the proper preparation of time-series data of aggregated PVS power output in electric power system service area is essential. However, the available data points are limited compared to the huge installation points of widely dispersed PVS in a power system service area. Therefore, this study proposes a modelling of aggregated PVS power output based on a low-pass filter (LPF) which is capable to take into account a smoothing effect of power output fluctuation around individual observation point. Then, the proposed model is applied to estimate the spatial
average irradiance in the central region (called the Chubu region) in Japan by using the irradiance data observed at 61 points. The reduction in the short-cycle fluctuation is evaluated in comparison to the time-series data calculated by the simple average of 61 points data. Finally, the usefulness of proposed model is discussed in the situation that the aggregated PVS power output in electric power system service area must be curtailed due to the surplus power supply in the electric power system.

Authors and affiliations

T. Kato1, T. Murase2, M. Kurimoto2, Y. Manabe1 and T. Funabashi1
1 Institute of Materials and Systems for Sustainability (IMaSS). (Japan)
2 Department of Electrical Engineering. Nagoya University. (Japan)

Key words

Photovoltaic power generation system, irradiance, smoothing-effect, curtailment

References

[1] D. Wu, F. Tang, T. Dragicevic. J. C. Vasquez, and J. M. Guerrero, “Autonomous Active Power Control for Islanded
AC Microgrids With Photovoltaic Generation and Energy Storage System”, IEEE Trans. on Energy Conversion, Vol.
29, No. 4, pp. 882-892 (2014).
[2] B. I. Craciun, T. Kerekes, D. Sera, and R. Teodorescu, "Frequency Support Functions in Large PV Power Plants
With Active Power Reserves," IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 2, No. 4, pp.
849-858 (2014).
[3] A. Bloom, A. Townsend, D. Palchak, J. Novacheck, J. King, C. Barrows, E. Ibanez, M. O’Connell, G. Jordan, B. Roberts, C. Draxl, and K. Gruchalla, “Eastern Renewable Generation Integration Study”, NREL Technical Report 6A20-6447 (2016).
[4] K. Maslo, “Impact of Photovoltaics on Frequency Stability of Power System During Solar Eclipse”, IEEE Trans. On
Power Systems, Vol. 31, No. 5, pp. 3468-3655 (2016).
[5] T. Kato, Y. Manabe, T. Funabashi, T. Murase, M. Kurimoto, “A Study on Influence of Ramp-up of Aggregated Power
Output of Photovoltaic Power Generation on Electric Power System Frequency”, IEEE PESGM2017-001398 (2017)
[6] H. Nagoya, S. Komami, K. Ogimoto, “A Method for Presuming Total Fluctuation of Highly Penetrated Photovoltaic Generation Considering Mutual Smoothing Effect”, IEEJ Trans. EIS, Vol. 131, No. 10, pp. 1688-1695 (2011) (in Japanese)
[7] T. Kato, S. Kumazawa, N. Honda, M. Koaizawa, S. Nishino, Y. Suzuoki, “Development of Estimation Method of Spatial
Average Irradiance Fluctuation Characteristics Considering Smoothing Effect around Observation Point”, IEEJ Trans.
PE, Vol. 133, No. 1, pp.91-98 (2013) (in Japanese)
[8] T. Kato, K. Kawai, Y. Suzuoki, “Evaluation of Forecast Accuracy of Aggregated Photovoltaic Power Generation by
Unit Commitment”, IEEE PEGM2013-000900 (2013)