scholarly journals Control of Photovoltaic Systems for Enhanced Short-Term Voltage Stability and Recovery

2019 ◽  
Vol 34 (1) ◽  
pp. 243-254 ◽  
Author(s):  
Gustav Lammert ◽  
Daniel Premm ◽  
Luis David Pabon Ospina ◽  
Jens C. Boemer ◽  
Martin Braun ◽  
...  
Keyword(s):  
Voltage Stability ◽  
Photovoltaic Systems ◽  
Short Term

Impact of fault ride-through and dynamic reactive power support of photovoltaic systems on short-term voltage stability

2017 ◽  
Author(s):  
Gustav Lammert ◽  
Jens C. Boemer ◽  
Daniel Premm ◽  
Oliver Glitza ◽  
Luis David Pabon Ospina ◽  
...  
Keyword(s):  
Voltage Stability ◽  
Reactive Power ◽  
Photovoltaic Systems ◽  
Short Term ◽  
Fault Ride Through

scholarly journals An On-Line Low-Cost Irradiance Monitoring Network with Sub-Second Sampling Adapted to Small-Scale PV Systems

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3405 ◽  
Author(s):  
Manuel Espinosa-Gavira ◽  
Agustín Agüera-Pérez ◽  
Juan González de la Rosa ◽  
José Palomares-Salas ◽  
José Sierra-Fernández
Keyword(s):  
Sensor Networks ◽  
Low Cost ◽  
Monitoring Network ◽  
Absolute Error ◽  
Small Scale ◽  
Photovoltaic Systems ◽  
Real Time Control ◽  
Short Term ◽  
Time Control ◽  
Cloud Motion

Very short-term solar forecasts are gaining interest for their application on real-time control of photovoltaic systems. These forecasts are intimately related to the cloud motion that produce variations of the irradiance field on scales of seconds and meters, thus particularly impacting in small photovoltaic systems. Very short-term forecast models must be supported by updated information of the local irradiance field, and solar sensor networks are positioning as the more direct way to obtain these data. The development of solar sensor networks adapted to small-scale systems as microgrids is subject to specific requirements: high updating frequency, high density of measurement points and low investment. This paper proposes a wireless sensor network able to provide snapshots of the irradiance field with an updating frequency of 2 Hz. The network comprised 16 motes regularly distributed over an area of 15 m × 15 m (4 motes × 4 motes, minimum intersensor distance of 5 m). The irradiance values were estimated from illuminance measurements acquired by lux-meters in the network motes. The estimated irradiances were validated with measurements of a secondary standard pyranometer obtaining a mean absolute error of 24.4 W/m 2 and a standard deviation of 36.1 W/m 2 . The network was able to capture the cloud motion and the main features of the irradiance field even with the reduced dimensions of the monitoring area. These results and the low-cost of the measurement devices indicate that this concept of solar sensor networks would be appropriate not only for photovoltaic plants in the range of MW, but also for smaller systems such as the ones installed in microgrids.

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