High-Voltage Cable Sheath Induced Voltage and Circulation Current Analysis

2019 ◽  
Vol 08 (03) ◽  
pp. 94-101
Author(s):  
向东 朱
Keyword(s):  
High Voltage ◽  
Induced Voltage ◽  
Current Analysis ◽  
Circulation Current

scholarly journals Hidden High Voltage Safety Risks for Parallel High Voltage Transmission Lines

2018 ◽  
Vol 171 ◽  
pp. 02005
Author(s):  
M. Nassereddine ◽  
J. Rizk ◽  
M. Nagrial ◽  
A. Hellany ◽  
N. Moubayed ◽  
...  
Keyword(s):  
High Voltage ◽  
Transmission Lines ◽  
Electrical Power ◽  
Paper Analysis ◽  
Induced Voltage ◽  
Parallel Transmission ◽  
Safety Risks ◽  
Unsafe Condition ◽  
Risk Potential

High voltage (HV) infrastructures market is growing due to the corresponding growth in industries and population. To ensure continuous and reliable electrical power supply, existing substation and transmission lines are being upgraded to accommodate the additional load requirements. These upgrades involve up-rating the existing transmission lines or the installation of new lines. To save on easement cost and reduce the environmental impacts, transmission lines are occupied the same easement or path. This parallel option introduces the risk of induced voltage which could reach an unsafe condition and jeopardize the safety of works and people. This paper analysis and highlight the hidden risk associated with two parallel transmission lines that connected the same high voltage substation. The theoretical study which is supported by the case study shows the high risk potential tempering with the OHEW on the isolated circuit while the other one is still energized

scholarly journals INDUCED VOLTAGES CREATED BY A HIGH-VOLTAGE CABLE

2020 ◽  
Vol 2020 (1) ◽  
pp. 219-220
Author(s):  
Ty Nguen
Keyword(s):  
High Voltage ◽  
Power Lines ◽  
Induced Voltage ◽  
Modes Of Operation ◽  
Short Circuits

The results of modeling the effects of a high-voltage cable with cross-linked polyethylene insulation on adjacent power lines are presented. The calculations of the induced voltage on the adjacent voltage line were performed for five modes of operation of the 110 kV cable: symmetric and four unbalanced, caused by short circuits between the conductors, as well as between the conductors and the screen.

Voltage Multiplier Circuits with Coupled-Inductor Applied to a High Step-Up DC-DC Converter

2015 ◽  
Vol 781 ◽  
pp. 418-421
Author(s):  
Chalermpol Reaungepattanawiwat ◽  
Yutthana Kanthaphayao
Keyword(s):  
High Voltage ◽  
Field Programmable Gate Array ◽  
Input Voltage ◽  
Control Signal ◽  
Voltage Gain ◽  
Induced Voltage ◽  
Voltage Multiplier ◽  
High Voltage Gain ◽  
Field Programmable ◽  
Multiplier Circuit

This paper presents a high voltage gain of a DC-DC converter. The proposed system consists of voltage multiplier circuits and a coupled inductor of a boost DC-DC converter. The input voltage of the voltage multiplier circuit is the induced voltage of inductor at a boost DC-DC converter. The field programmable gate array (FGPA) is used for generating the control signal of the proposed system. To verify the proposed circuit, an experiment was conducted from the prototype circuit. The proposed circuit can step-up the voltage with high voltage gain. Moreover, the voltage across the switch is very low.

Induced Voltage Behavior on Pipelines Due to HV AC Interference: Effective Length Concept

2015 ◽  
Vol 16 (2) ◽  
pp. 131-139
Author(s):  
Mohamad Nassereddine ◽  
Jamal Rizk ◽  
Mahmood Nagrial ◽  
Ali Hellany
Keyword(s):  
Environmental Impact ◽  
High Voltage ◽  
Transmission Lines ◽  
Theoretical Study ◽  
Effective Length ◽  
Induced Voltage ◽  
Shielding Factor ◽  
Ac Interference ◽  
Superposition Theorem

Abstract High-voltage infrastructure upgrade is expending due to the growth in populations. To save on easement cost and to reduce the environmental impact of these projects, HV transmission lines occupy the same easement as pipelines in many cases. This joint easement introduces the AC interference between transmission lines and pipelines. The induced voltage can reach a limit which will jeopardize the human safety. The cited research studies the induced voltage under the presence of the overhead earth wire (OHEW) using the shielding factor. The work in this paper studies the induced voltage using the OHEW section current along with the superposition theorem. The simulations are compared to the existing research methods. The case study along with the theoretical study discusses the advance accuracy of the proposed method over the existing shield factor used in the presence research. Furthermore, they introduce the effective length along with the effective shielding factor, which aids in computing the additional effect that the OHEW has on the induced voltage.

A Dedicated Device Based on the Spatial Electric Field for Measuring Voltage of Catenary System

2015 ◽  
Vol 734 ◽  
pp. 109-112
Author(s):  
Jia Song ◽  
Xiao Dong Zhang ◽  
Yue Jia Sun
Keyword(s):  
Electric Field ◽  
Field Test ◽  
High Voltage ◽  
Test Results ◽  
Induced Voltage ◽  
Voltage Measurement ◽  
Measuring Device ◽  
Voltage Difference ◽  
The Earth ◽  
Catenary System

The traditional high-voltage electroscope is difficult to distinguish normal catenary voltage and induced voltage. In order to solve the problem, a method to measure high-voltage based on the effect of space electric field is proposed and a dedicated catenary voltage measuring device is made. The method follows divider effect of spatial capacitance and achieves quantitative voltage measurement without grounding by measuring and transforming the induced voltage difference of the capacitance which is placed between the catenary system and the earth and showing the actual catenary voltage value in LCD. The device can effectively distinguish catenary normal voltage and induced voltage, then reflects catenary real operation state. The field test results show the device meets the requirement of catenary voltage measurement.

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