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Local and remote control of automatic voltage regulators in distribution networks with different variations and uncertainties: Practical cases study
Ist Teil von
Electric power systems research, 2022-04, Vol.205, p.107773, Article 107773
Ort / Verlag
Amsterdam: Elsevier B.V
Erscheinungsjahr
2022
Link zum Volltext
Quelle
Elsevier ScienceDirect Journals Complete
Beschreibungen/Notizen
•A new modified successive NRIM has been proposed for radial distribution system embedded PDVRs.•Local and remote control of voltage regulator equipment.•Different load models, types, and associated uncertainties, with regard to the analysis of electrical energy distribution systems.•A satisfactory demonstration of the proposed methodology for practical cases studies.•System losses are significantly decreased, and the voltage profile is enhanced for all distribution nodes.•Robust verifications are demonstrated between the proposed NRIM and the well-known ETAP software.
Over time, increased loading density, feeder length and line losses lead to inappropriate voltage drop. Also, load demand variations which originate from daily and seasonal fluctuations present further impacts. Power Distribution Voltage Regulators (PDVRs) keep the voltages in the electrical distribution network under a certain range. Voltage regulation ensures that electrical devices perform efficiently. This paper presents an approach for adequate representation of PDVR in medium voltage (MV) distribution networks. Both local and remote-control modes of PDVR operation are provided. In local control, the PDVR automatically controls its tapping steps to regulate the voltage at the installed PDVR node whereas the remote-control mode makes use of reliable communications due to smart grid capability to regulate the voltage at other specified nodes. Added to that, different load models are conducted for suitable representation of residential, commercial and industrial types which are formulated as constant impedance, constant-power and constant-current models. Moreover, the hourly variations in the loading are considered and their impacts are analyzed on both control modes. As well, the uncertainties in loading values and types are investigated. The validity of the proposed NRIM is effectively demonstrated on two real power distribution networks from Egypt and from the metropolitan area of Caracas. The numerical results declare that the application of PDVR through the local and remote-control modes significantly improves the performance of the studied systems. The active and reactive power losses are greatly decreased, and the voltage profile is considerably enhanced for all distribution nodes.