Impact of Household PV Generation on the Voltage Quality in 0.4 kV Electric Grid—Case Study

Peteris Apse-Apsitis (), Oskars Krievs and Ansis Avotins
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Peteris Apse-Apsitis: Institute of Industrial Electronics and Electrical Engineering, Riga Technical University, LV-1048 Riga, Latvia
Oskars Krievs: Institute of Industrial Electronics and Electrical Engineering, Riga Technical University, LV-1048 Riga, Latvia
Ansis Avotins: Institute of Industrial Electronics and Electrical Engineering, Riga Technical University, LV-1048 Riga, Latvia

Energies, 2023, vol. 16, issue 6, 1-11

Abstract: This article (case study) discusses the influence of household photovoltaic generation on the voltage quality in a three-phase 0.4 kV grid. The research analyzes remotely acquired data from two specially designed three-phase Y-connected power meters to understand the PV system’s influence on the grid. The values of the voltages, currents, THD, individual harmonics, power factor, and K-factor are obtained every 200 ms over several months, creating more than 20 GB of data. The loads are typical household electrical appliances and EV portable chargers. The main conclusion after analyzing the measurements is that three-phase PV generation in the presence of household loads can create or increase grid unbalance; important current values into the neutral wire and THD and K-factor increase in some cases. The results also uncovered that without current sensing at the household connection point to the three-phase grid to control the PV inverter, the balanced phase output power of the grid-tied inverter is harmful to the 0.4 kV grid balance.

Keywords: solar energy; photovoltaic; power quality; harmonics; THD; inverters (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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