scholarly journals Assessment by Simulation of Different Topological Integration of Solar Photovoltaic Plant in Medium Voltage Distribution Networks

2021 ◽  
Vol 29 (2) ◽  
Author(s):  
Md. Milon Uddin ◽  
Mushfiqur Rahman ◽  
Md. Tanzid Ridwan Hossain ◽  
Md. Habibur Rahman
Keyword(s):  
Power Plant ◽  
Distribution Systems ◽  
Fossil Fuels ◽  
Induction Machine ◽  
Distribution Networks ◽  
Solar Photovoltaic ◽  
Voltage Distribution ◽  
Medium Voltage ◽  
Study Results ◽  
Photovoltaic Plant

Fossil fuels are diminishing day by day and are being utilized for various purposes like transportation, electricity generation, cooking and other uses which emits harmful gases. Global warming is increasing due to greenhouse gases. Sunlight is abundant compared to fossil fuels. Photovoltaic (PV) power plant could be one of the best techniques to lessen using of fossil fuels. Effect of different topological integration of solar photovoltaic plant in medium voltage distribution network had been analyzed in this research. Analysis had been done based on 1. loadability (capability of an electrical grid to run the connected load) 2. maximum power input. Fractioning (a way of splitting the total photovoltaic power generation into different size and number of plant) generation effect of PV generators in distribution systems had been found by a comparative study. Results show that change in loadability was due to placement and fraction of solar power plant in various buses. In addition, maximum input power of PV system varied with the placement of generation units among picked buses. Interaction among PV systems, and induction machine had been carried out and the result shows that interaction among PV and induction machine was different in terms of loadability because of fractioning. It had been found that change of loadability occurred due to fractioning and distribution of photovoltaic systems on different types of designed topology.

scholarly journals Permanent Closed-Loop Operation as a Measure for Improving Power Supply Reliability in a Rural Medium Voltage Distribution Network

2021 ◽  
Vol 19 ◽  
pp. 523-527
Author(s):  
G. Stumberger ◽  
◽  
M. Roser ◽  
B. Polajzer
Keyword(s):  
Power Supply ◽  
Rural Areas ◽  
Urban Areas ◽  
Distribution Systems ◽  
Closed Loop ◽  
Distribution Network ◽  
Distribution Networks ◽  
Voltage Distribution ◽  
Medium Voltage ◽  
Supply Reliability

Power supply reliability is one of the critical elements of power quality. Its improvement in medium voltage distribution systems in urban areas is typically achieved by cabling. Unfortunately, this approach is often too expensive to be applied in rural areas. One of the possible alternative solutions that can be used in rural medium voltage distribution networks is permanent closed-loop operation. It requires the introduction of additional reclosers with properly parametrized protection relays enabling directional protection. This paper focuses on the case study performed in the 20 kV rural distribution network of Elektro Celje d.d.. Two feeders, where the reliability of the power supply was low, were analyzed. Results of techno-economical evaluation eliminated cabling as a viable solution. The permanent closed-loop operation was selected and implemented after proper placement and parameterization of relays with directional protection functions. The results of two years operation in permanent closedloop arrangement of feeders show substantial improvement in the reliability of power supply.

Techniques for the diagnosis of oscillatory transients resulting from capacitor bank switching in medium voltage distribution systems

2021 ◽  
Vol 133 ◽  
pp. 107198
Author(s):  
Alessandra B.G. Hoffmann ◽  
Carlos H. Beuter ◽  
André L.S. Pessoa ◽  
Liz R.A. Ferreira ◽  
Mário Oleskovicz
Keyword(s):  
Distribution Systems ◽  
Capacitor Bank ◽  
Voltage Distribution ◽  
Medium Voltage ◽  
Capacitor Bank Switching
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