Surge overvoltages and surge protection in low-voltage a.c. power systems. General basic information

2015 ◽  
Keyword(s):  
Power Systems ◽  
Low Voltage ◽  
Basic Information ◽  
Surge Protection

scholarly journals Uncontrolled Electric Vehicle Charging Impacts on Distribution Electric Power Systems with Primarily Residential, Commercial or Industrial Loads

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1688 ◽  
Author(s):  
C. Birk Jones ◽  
Matthew Lave ◽  
William Vining ◽  
Brooke Marshall Garcia
Keyword(s):  
Power Systems ◽  
Electric Power ◽  
Low Voltage ◽  
Peak Load ◽  
Electric Power Systems ◽  
Primary System ◽  
Maximum Increase ◽  
Actual Distribution ◽  
The Impact ◽  
Ev Charging

An increase in Electric Vehicles (EV) will result in higher demands on the distribution electric power systems (EPS) which may result in thermal line overloading and low voltage violations. To understand the impact, this work simulates two EV charging scenarios (home- and work-dominant) under potential 2030 EV adoption levels on 10 actual distribution feeders that support residential, commercial, and industrial loads. The simulations include actual driving patterns of existing (non-EV) vehicles taken from global positioning system (GPS) data. The GPS driving behaviors, which explain the spatial and temporal EV charging demands, provide information on each vehicles travel distance, dwell locations, and dwell durations. Then, the EPS simulations incorporate the EV charging demands to calculate the power flow across the feeder. Simulation results show that voltage impacts are modest (less than 0.01 p.u.), likely due to robust feeder designs and the models only represent the high-voltage (“primary”) system components. Line loading impacts are more noticeable, with a maximum increase of about 15%. Additionally, the feeder peak load times experience a slight shift for residential and mixed feeders (≈1 h), not at all for the industrial, and 8 h for the commercial feeder.

scholarly journals Power anomaly effects and costs in low-voltage mobile power systems

2006 ◽  
Vol 42 (2) ◽  
pp. 612-624 ◽  
Author(s):  
Shengyi Liu ◽  
C.H. Singer ◽  
R.A. Dougal
Keyword(s):  
Power Systems ◽  
Low Voltage

Characteristic Analysis on Suppressing VFTO in GIS by Ferrite

2013 ◽  
Vol 834-836 ◽  
pp. 385-389
Author(s):  
Xiang Gen Gan ◽  
Shui Ping Zhong ◽  
Sheng Wei ◽  
Dong Bao Yang
Keyword(s):  
Wave Propagation ◽  
Power Systems ◽  
Traveling Wave ◽  
Low Voltage ◽  
Characteristic Analysis ◽  
Fast Transient ◽  
Transient Overvoltage ◽  
Great Harm

When disconnecting switches were operated,Very Fast Transient Overvoltage (VFTO) did great harm to power systems and their equipments in Gas Insulated Substations (GIS). Although VFTO can be suppressed by a few of known methods, there were some problems. Low voltage simulation tests show that putting ferrite rings around a disconnecting generatrix can damp traveling wave propagation and suppress VFTO in GIS. This method is economic and practical. We had analyzed ferrite characteristics of suppressing VFTO and got hold of ways of calculating ferrite size in GIS. Investigation shows that ferrite characteristics and sizes have a great effect on suppressing VFTO.

A Review of the Smart Grid Concept for Electrical Power System

2022 ◽  
pp. 1361-1385
Author(s):  
Amam Hossain Bagdadee ◽  
Li Zhang
Keyword(s):  
Smart Grid ◽  
Power Systems ◽  
Power System ◽  
Electric Power ◽  
Smart Grids ◽  
Electrical Power ◽  
Future Generation ◽  
Electric Power Systems ◽  
Basic Information ◽  
Electrical Power System

The review this article conducts is an extensive analysis of the concept of a smart grid framework with the most sophisticated smart grid innovation and some basic information about smart grid soundness. Smart grids as a new scheme for energy and a future generation framework encourages the expansion of information and progress. The smart grid framework concord will potentially take years. In this article, the focus is on developing smart networks within the framework of electric power systems.

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