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Location:
Hybrid Conference, The Hague,
Netherlands
Conference date:12-14 October 2022
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A concern from a grid owner perspective is how so-called hybrid power park (HPP) will influence the power quality (PQ) in their distribution grid. This project studies how PQ and on-load tap-changer operations are affected by a solar-wind HPP located in a Swedish municipality. PQ measurements were performed in ten-minute intervals during 2021 for relevant PQ parameters in wind and photovoltiaics (PV) power parks and a low-voltage substation all connected to the same 10/130 kV transformer and compared to two other load-dominated transformers. Results show that 'events' (i.e., deviations from PQ standards) were more common when measured at the connection points of the parks (130-132 events) than in a than in a load-dominated transformer (70 events). Events are slightly more likely when PV power generation dominates. However, only a few (sag) events may require the grid operator to act. Overall there are less tap changing operations in the transformer in which the HPP is connected compared to in a load-dominated transformer. This is probably due to a broader bandwidth in the tap-changer of the HPP transformer, which may cause future problems downstream. In conclusion, the grid operator should presently not be worried that the HPP will increase PQ issues.