scholarly journals FIRES ON THE HOUSEHOLD LOW-VOLTAGE DISTRIBUTION BOARD CAUSED BY THE ABSENCE OF POLE MOUNTED FUSES AND SURGE ARRESTERS

2013 ◽  
Vol 3 (4) ◽  
Author(s):  
Nedžad Hadžiefendić ◽  
Ivan Zarev ◽  
Nebojša Đenić ◽  
Marko Medić
Keyword(s):  
Low Voltage ◽  
Distribution Network ◽  
Fault Current ◽  
Fire Occurrence ◽  
Voltage Distribution ◽  
Protective Devices ◽  
Surge Arresters ◽  
Fault Currents ◽  
Electrical Distribution ◽  
Electrical Distribution Network

This paper deals with the issue of the fire occurrence which is caused by low-voltage electrical installations (household distribution board) due to the absence of protective devices (fuses and surge arresters) on the pillars of the electrical distribution network. The example of calculation of fault currents is given, for the fault current on the basis of which it is proved the necessity of installing of pole mounted fuse on the latest pillar of low-voltage electrical distribution network. In the paper there are examples of fire expertise for fires caused by non-installation of pole mounted fuses and surge arresters are presented. Key words:atmospheric discharges, over-voltages, fault current, fire, pole mounted fuse, surge arrester

Impacts of Low Voltage PEVs Single Phase Charging on Electrical Distribution Network

2015 ◽  
Vol 781 ◽  
pp. 316-320 ◽  
Author(s):  
Thongchai Klayklueng ◽  
Sanchai Dechanupaprittha
Keyword(s):  
Case Studies ◽  
Single Phase ◽  
Low Voltage ◽  
Distribution Network ◽  
Base Case ◽  
Charging Time ◽  
Electrical Distribution ◽  
Electrical Distribution Network ◽  
Network Simulation Model ◽  
The Impact

This paper presents impacts of low voltage PEV single phase charging on electrical distribution network. Simulation model and analysis tools under DigSILENT Power Factory program were used in this research. There are 5 case studies under this analysis, where each case operates at different charging time durations between 16.00 and 24.00. Assessment of the impact of PEV charging is performed based on the PEA standards. The simulation results show that all charging case studies increase line loading in the distribution network over the limit by 80%. The voltage at the upstream point of the feeder slightly dropped while at the downstream point dropped 4 times lower. Average line losses for all case studies increase approximately 13.36% compared to the base case study.

scholarly journals Resilience Modeling of Flood Induced Electrical Distribution Network Failures: Munich, Germany

2021 ◽  
Vol 9 ◽  
Author(s):  
Jorge Leandro ◽  
Shane Cunneff ◽  
Lorenz Viernstein
Keyword(s):  
Low Voltage ◽  
Distribution Network ◽  
Heavy Precipitation ◽  
Electrical Network ◽  
Voltage Transformer ◽  
Medium Voltage ◽  
Electrical Distribution ◽  
Electrical Distribution Network ◽  
Flooding Events ◽  
Severe Flooding

Of many defining characteristics for a flood resilient city and its infrastructure networks, mitigating flooding impacts and recovering quickly to a pre-flood state are to be considered of high importance. With a likely increase in the frequency and intensity of future heavy precipitation and flooding events in Europe, the vulnerability of the electrical distribution network of Maxvorstadt, Munich will also increase. These facts justify the need for quantifying how the electrical distribution network would respond to flooding, and more so, how stakeholders can better prepare for such an event. For a synthetic electrical distribution network of Maxvorstadt, the timing and location of network components failure due to flooding and affected persons without power have been computed for a combination of realistic future flooding events via the Electrical Network Flood Resilience Model developed in this study. It has been learned that most buildings, and therefore their inhabitants, lose power due to the failure of a specific component, Medium Voltage—Low Voltage transformer buses, and that flood risk solutions should focus on protecting network components from inundation to ensure its functionality through flooding events. Solutions like dry proofing such components before severe flooding occurs is recommended for several neighborhoods analyzed in this study.

scholarly journals Optimal Routing an Ungrounded Electrical Distribution System Based on Heuristic Method with Micro Grids Integration

2019 ◽  
Vol 11 (6) ◽  
pp. 1607 ◽  
Author(s):  
Wilson Pavón ◽  
Esteban Inga ◽  
Silvio Simani
Keyword(s):  
Distribution System ◽  
Low Voltage ◽  
Voltage Drop ◽  
Distribution Network ◽  
Heuristic Method ◽  
Network Routing ◽  
Electrical Network ◽  
Optimal Routing ◽  
Electrical Distribution ◽  
Electrical Distribution Network

This paper proposes a three-layer model to find the optimal routing of an underground electrical distribution system, employing the PRIM algorithm as a graph search heuristic. In the algorithm, the first layer handles transformer allocation and medium voltage network routing, the second layer deploys the low voltage network routing and transformer sizing, while the third presents a method to allocate distributed energy resources in an electric distribution system. The proposed algorithm routes an electrical distribution network in a georeferenced area, taking into account the characteristics of the terrain, such as streets or intersections, and scenarios without squared streets. Moreover, the algorithm copes with scalability characteristics, allowing the addition of loads with time. The model analysis discovers that the algorithm reaches a node connectivity of 100%, satisfies the planned distance constraints, and accomplishes the optimal solution of underground routing in a distribution electrical network applied in a georeferenced area. Simulating the electrical distribution network tests that the voltage drop is less than 2% in the farthest node.

scholarly journals Series FACTS controllers in industrial low voltage electrical distribution networks for reducing fault current levels

2021 ◽  
Vol 12 (4) ◽  
pp. 1953
Author(s):  
Vishnu Charan Thippana ◽  
Alivelu Manga Parimi ◽  
Chandram Karri
Keyword(s):  
Low Voltage ◽  
Short Circuit ◽  
Thermal Power ◽  
Distribution Network ◽  
Distribution Networks ◽  
Fault Current ◽  
Control Logic ◽  
Control Series ◽  
Facts Devices ◽  
Electrical Distribution

In this paper, series FACTS devices like Thyristor control series capacitor(TCSC)and Static synchronous series compensator (SSSC) with designed control logic used to reduce the fault current located in LV distribution network at the LV busbar. The electrical distribution network in small and medium scale industries such as steel plants, process and power plants is through low voltage switchgear (LVS) fed from motor control centre (MCC) switchgear through step down transformer of 11kV or 33kV /415V. The designed switchgear in the LV side for these utilities usually is at 50kA. However, the process loads are continuously increasing and sustained with additional feeders with the existing switchgear. Consequently, the fault current at the busbar of the switchgear increases which may require the replacement of entire switchgear to the new design fault current. However, upgrading the existing switchgear is not an economical solution to the industries. Alternatively reducing the fault current at the busbar is feasible. Controller design implemented for reducing the short circuit current with series FACTS devices. A study carried on 800 MW Thermal power plant Ash handling LVS in ETAP and Matlab. It is observed that the results are encouraging to use series FACTS devices effectively in the LVS.

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