Analysis of the Impact of AC Faults and DC Faults on the HVDC Transmission Line

2021 ◽  
pp. 123-136
Author(s):  
Deepak Singh ◽  
D. Saxena ◽  
Rajeev Kumar Chauhan
Keyword(s):  
Transmission Line ◽  
Hvdc Transmission ◽  
The Impact

scholarly journals Methodology to calculate the density of the magnetic field generated in overhead transmission lines in HVDC applying a two-dimensional analysis of parallel poles above ground level

2020 ◽  
pp. 1-11
Author(s):  
Jorge Luis AGUILAR-MARIN ◽  
Luis CISNEROS-VILLALOBOS ◽  
Jorge Gabriel PADILLA-CANTERO ◽  
Julio Cesar VERGARA-VÁZQUEZ
Keyword(s):  
Magnetic Field ◽  
Transmission Line ◽  
Transmission Lines ◽  
Ground Level ◽  
Design Parameters ◽  
Hvdc Transmission ◽  
Overhead Transmission Line ◽  
The Impact ◽  
The Magnetic Field

The growth in the demand for electricity has led to the development and application of technologies that make its means of transport more efficient. Thus, one of these options is the implementation of transmission lines in HVDC. One of important design parameters of these lines is to know their magnetic field distribution, when it is required to calculate it, there is no methodology that can be applied to HVDC transmission lines. The following article presents a methodology that allows obtaining the density of the magnetic field on the corridor of an overhead transmission line. A case study of a 500 kV bipolar line in HVDC is presented, the results obtained are compared using the commercial software Field and corona Effects (FACE), the results obtained are consistent with those obtained from the presented methodology. An analysis of the impact of the transmission line configuration on the magnetic field density is developed, defining the most efficient configuration.

Toward Online Control of Local Bifurcation in Power Systems via Network Topology Optimization

2015 ◽  
Vol 25 (12) ◽  
pp. 1550167
Author(s):  
Lei Wang ◽  
Hsiao-Dong Chiang
Keyword(s):  
Topology Optimization ◽  
Power Systems ◽  
Transmission Line ◽  
Network Topology ◽  
Online Control ◽  
Power Grids ◽  
Local Bifurcations ◽  
Network Topology Optimization ◽  
Online Methods ◽  
The Impact

This paper presents online methods for controlling local bifurcations of power grids with the goal of increasing bifurcation values (i.e. increasing load margins) via network topology optimization, a low-cost control. In other words, this paper presents online methods for increasing power transfer capability subject to static stability limit via switching transmission line out/in (i.e. disconnecting a transmission line or connecting a transmission line). To illustrate the impact of network topology on local bifurcations, two common local bifurcations, i.e. saddle-node bifurcation and structure-induced bifurcation on small power grids with different network topologies are shown. A three-stage online control methodology of local bifurcations via network topology optimization is presented to delay local bifurcations of power grids. Online methods must meet the challenging requirements of online applications such as the speed requirement (in the order of minutes), accuracy requirement and robustness requirement. The effectiveness of the three-stage methodology for online applications is demonstrated on the IEEE 118-bus and a 1648-bus practical power systems.

scholarly journals Modeling for Development of Simulation Tool: Impact of TCSC on Apparent Impedance Seen by Distance Relay

2018 ◽  
Vol 8 (5) ◽  
pp. 3332-3337
Author(s):  
N. M. Khoa ◽  
D. D. Tung
Keyword(s):  
Transmission Line ◽  
Power Transmission ◽  
Short Circuit ◽  
Simulation Software ◽  
Voltage Source ◽  
Power Transmission Line ◽  
Distance Protection ◽  
Protection Relay ◽  
The Impact ◽  
Distance Protection Relay

The impact of thyristor controlled series capacitor (TCSC) on distance protection relays in transmission lines is analyzed in this paper. Voltage and current data are measured and collected at the relay locations to calculate the apparent impedance seen by distance protection relays in the different operating modes of the TCSC connected to the line. Short-circuit faults which occur at different locations on the power transmission line are considered in order to locate the fault for the purpose of evaluating the impact of TCSC on the distance protection relay. Matlab/Simulink simulation software is used to model the power transmission line with two sources at the two ends. Voltage source, transmission line, TCSC, voltage and current measurement, and discrete Fourier transform (DFT) blocks are integrated into the model. Simulation results show the impact of TCSC on the distance protection relay and determine the apparent impedance and fault location in the line.

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