Examinando por Materia "Experimental network"
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- PublicaciónSólo datosStudy of Power Quality at the Point of Common Coupling of a Low Voltage Grid and a Distributed Generation System of 7.8 kWp in a Tropical Region(Energies - MDPI, 2018-06-13) Valverde Granja, Agustín; De Souza, Teófilo Miguel; Magalhães Sobrinho, Pedro; Arévalo Santos, Daniel FelipeIn this paper we analyze an experimental 1000 kWh/month distributed generation system in a tropical region connected to a point of common coupling in a low voltage grid that was characterized according to NTC 5001. This photovoltaic system has 7.8 kWp and uses 30 polycrystalline silicon-panels of 260 Wp each. Its maximum energy produced was 850 kWh/month, equivalent to 72.65% of the installed capacity. Finally, there was an increase of 2% with respect to the minimum voltage value that was recorded. The voltage unbalance decreases between 3.5 and 70% and voltage harmonics in each line increased by 7% on line U1, 0.8% on U2, 3% on U3 and current harmonics have a 22% increase. Likewise, the total active and reactive power were increased by 58% and 42% respectively, and the thermography study allowed to establish a temperature increase at the point of common coupling of 7.5%. Therefore, it is expected that this paper can serve as a reference for the application of Colombian law 1715 in solar energy.
- ÍtemAcceso abiertoStudy of the electrical Power quality in the common connection point between a 7.8 kWp PV system and a low-voltage network.(Ingeniería y Competitividad, 2018-02-11) Valverde-Granja, Agustín; De Souza, Teófilo M; Magalhaes-Sobrinho, PedroAn experimental 1,000 kWh/month PV solar system was connected to a low-voltage network at the Universidad de Ibagué, Colombia. In this work, we present the findings about the electrical voltage issues in the common connection point. The characterization of the low-voltage network was based on the NTC 5001 standard, including aspects such as voltage imbalance, intermittency, short and long-term flicker, and harmonics. The maximum energy production was 850 kWh /month, equal to the 72.65 % of the total installed capacity. In this condition, the minimum voltage measurements evidenced a 2 % increase from the previous value, the voltage imbalance was 3.5 to 70 % lower, and the voltage harmonics (TDH) increased 7, 0.8 and 3 % in the phases U1, U2 and U3, respectively. Current harmonics did not show significant increases in lines U2 and U3, line U1 recorded an increase of 22 %, but there were no significant variations in the short and long-term flicker, notches and interruptions. Regarding the electrical power, the active and reactive components increased 58 and 42 %, respectively, and the thermographic study indicated a 7.5 % increasing temperature after the installation of the experimental PV system. This experience aims to be a reference project in the implementation of the Act 1715 of the Colombian government to promote solar systems.