Abstract
The characteristic variability of solar power brings potential threats to power system frequency stability by introducing short-term power fluctuations. A nationwide virtual PV (photovoltaic) system of 14 locations in Finland with interplant distances between 10 km to 1065 km has been analyzed at 1 Hz resolution by introducing stochastic variables i.e. power fluctuation, maximum power fluctuation and smoothing potential factor. The paper presents a multifold smoothing analysis based on geographical dispersion, ensemble size, temporal resolutions and interplant distances of PV plants. Empirical expressions are proposed using regression analysis, which represents a decay of smoothing potential factor for a decreasing time resolution. Aggregated strength of maximum power fluctuation of$N$number of PV plants decreases by a converging factor 1/-N and an ensemble of 14 PV plants follows the strict ramp rate limits for 97.5% of the total production time. Spatial correlation w.r.t interplant distances is also focused.
Original language | English |
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Title of host publication | 2018 IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT-Europe) |
Publisher | IEEE |
Number of pages | 6 |
ISBN (Electronic) | 978-1-5386-4505-5 |
ISBN (Print) | 978-1-5386-4506-2 |
DOIs | |
Publication status | Published - Oct 2018 |
Publication type | A4 Article in conference proceedings |
Event | IEEE PES Innovative Smart Grid Technologies Conference Europe - Duration: 1 Jan 1900 → … |
Conference
Conference | IEEE PES Innovative Smart Grid Technologies Conference Europe |
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Period | 1/01/00 → … |
Keywords
- Fluctuations
- Smoothing methods
- Power smoothing
- Uncertainty
- Frequency control
- Time-frequency analysis
- Power system stability
- Maximum power fluctuation
- PV generation
- Solar irradiance uncertainty
- Ramp rate
Publication forum classification
- Publication forum level 1