Improved low voltage solution calculation method for voltage stability assessment of electric power systems

2002 ◽  
Author(s):  
C.A. Castro
Keyword(s):  
Power Systems ◽  
Electric Power ◽  
Calculation Method ◽  
Voltage Stability ◽  
Low Voltage ◽  
Electric Power Systems ◽  
Stability Assessment

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.

A generalized approach to the analysis of voltage stability in electric power systems

1985 ◽  
Vol 9 (1) ◽  
pp. 49-62 ◽  
Author(s):  
Michele Brucoli ◽  
Federico Rossi ◽  
Francesco Torelli ◽  
Michele Trovato
Keyword(s):  
Power Systems ◽  
Electric Power ◽  
Voltage Stability ◽  
Electric Power Systems

scholarly journals Mitigating the Adverse Impact of Un-Deterministic Distributed Generation on a Distribution System Considering Voltage Profile

2018 ◽  
Vol 8 (3) ◽  
pp. 2998-3003
Author(s):  
M. A. Aman ◽  
S. Ahmad ◽  
B. Noor ◽  
F. W. Karam
Keyword(s):  
Power Systems ◽  
Electric Power ◽  
Distributed Generation ◽  
Distribution System ◽  
Low Voltage ◽  
Stability Limit ◽  
Electric Power Systems ◽  
Primary Concern ◽  
Voltage Profile ◽  
Cross Sectional

Electric power systems are enforced to operate near to their stability limit due to the fast increase in power demand. Therefore, voltage stability has become a primary concern. The main cause of voltage variations is the imbalance between generation and consumption. In order to mitigate variations in voltage profile, most of the modern electric power systems are adopting new emerging technologies such as distributed generation. Validation of standard voltage optimization is a difficult task when distributed generation is integrated to medium and low voltage networks. Integration of distributed generation (DG) will have diverse impacts on voltage levels when connected un-deterministically to the electric distribution system. This paper analyzes both the impacts of un-deterministic large and small size DG on voltage profile. Feasible solutions by incorporating reactors and increasing cross sectional area of cables, variation in voltage profile were mitigated. Detailed simulations were performed in ETAP by modeling and evaluating Kohat road grid station situated in Peshawar, Pakistan. The results anticipated that this approach can be useful to ensure standard voltage profile and better utilization of un-deterministic DG units.

Sign in / Sign up

Export Citation Format

Share Document