The impact of charging strategies for electric vehicles on power distribution networks

2011 ◽  
Author(s):  
Philipp Stroehle ◽  
Silvio Becher ◽  
Steffen Lamparter ◽  
Alexander Schuller ◽  
Christof Weinhardt
Keyword(s):  
Electric Vehicles ◽  
Power Distribution ◽  
Distribution Networks ◽  
Power Distribution Networks ◽  
The Impact

Impact of pin Type Insulators on Power Distribution Networks Caused by Lightning Impulse Overvoltage

2015 ◽  
Vol 781 ◽  
pp. 300-303
Author(s):  
Khamhyo Phothilath ◽  
Kittipong Tonmitra ◽  
Pramin Artrit
Keyword(s):  
Power Distribution ◽  
Current Flow ◽  
Distribution Networks ◽  
Lightning Strike ◽  
Power Distribution Networks ◽  
Lightning Impulse ◽  
Flow Through ◽  
The Impact

The impact of pin type insulators may cause from the lightning impulse overvoltage that hits directly to them. To investigate this problem, this work applies the ATP Draw version 5.6 software to simulate the effect of pin type insulators. Therefore, the obtained results are showed that pin type insulators at pole P4 is closely the lightning strike point, has affected more than the poles P3-P1 and P5-P7. In addition, the conductor has been taken by the heat of over current flow through on it. The flashover and breakdown severity is on insulator upon the distance of them.

scholarly journals Instantaneous Disturbance Index for Power Distribution Networks

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1348
Author(s):  
María Dolores Borrás-Talavera ◽  
Juan Carlos Bravo ◽  
César Álvarez-Arroyo
Keyword(s):  
Power Systems ◽  
Real Time ◽  
Power Quality ◽  
Power Distribution ◽  
Distribution Networks ◽  
Accurate Estimation ◽  
Time Data ◽  
Power Distribution Networks ◽  
Disturbance Index ◽  
The Impact

The stability of power systems is very sensitive to voltage or current variations caused by the discontinuous supply of renewable power feeders. Moreover, the impact of these anomalies varies depending on the sensitivity/resilience of customer and transmission system equipment to those deviations. From any of these points of view, an instantaneous characterization of power quality (PQ) aspects becomes an important task. For this purpose, a wavelet-based power quality indices (PQIs) are introduced in this paper. An instantaneous disturbance index (ITD(t)) and a Global Disturbance Ratio index (GDR) are defined to integrally reflect the PQ level in Power Distribution Networks (PDN) under steady-state and/or transient conditions. With only these two indices it is possible to quantify the effects of non-stationary disturbances with high resolution and precision. These PQIs offer an advantage over other similar because of the suitable choice of mother wavelet function that permits to minimize leakage errors between wavelet levels. The wavelet-based algorithms which give rise to these PQIs can be implemented in smart sensors and used for monitoring purposes in PDN. The applicability of the proposed indices is validated by using a real-time experimental platform. In this emulated power system, signals are generated and real-time data are analyzed by a specifically designed software. The effectiveness of this method of detection and identification of disturbances has been proven by comparing the proposed PQIs with classical indices. The results confirm that the proposed method efficiently extracts the characteristics of each component from the multi-event test signals and thus clearly indicates the combined effect of these events through an accurate estimation of the PQIs.

scholarly journals Structural Evaluation for Distribution Networks with Distributed Generation Based on Complex Network

Complexity ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Fei Xue ◽  
Yingyu Xu ◽  
Huaiying Zhu ◽  
Shaofeng Lu ◽  
Tao Huang ◽  
...  
Keyword(s):  
Complex Network ◽  
Power Supply ◽  
Power Distribution ◽  
Distribution Networks ◽  
Original Structure ◽  
Power Distribution Networks ◽  
Complex Network Theory ◽  
Security Issues ◽  
Continuous Power ◽  
The Impact

Structural analysis based on complex network theory has been considered promising for security issues of power grids. At the same time, modern power distribution networks with more Distributed Generations (DGs) and Energy Storage Systems (ESS) have taken on more challenges in operation and security issues. This paper proposed a dedicated metric named as Power-Supply-Ability for power distribution networks based on net-ability. Special features of DGs, such as relations of capacities, identification of effective supply area, and limitation in continuous power supply, have been considered in definition. Furthermore, a novel opinion is proposed that the extent of improvement for operation and security by adding DGs also depends on the original structure of the distribution networks. This is an inherent ability of the original networks and could be quantitatively analyzed. Through case studies, this method has been proved to be effective in identifying potential structural vulnerabilities of distribution networks; particularly the impact of DGs on security has been studied. Furthermore, it can help in site selection for DGs by providing different priorities of locations compared with results of other works. This can help to complement other methods to construct a more comprehensive methodology by considering aspects of security, economy, and quality.

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