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Related Concept Videos

Power System Distribution01:25

Power System Distribution

273
Power system distribution involves delivering electrical energy from power plants to consumers through a network of transmission and distribution systems. The process begins at power plants, where energy from coal, gas, nuclear, water, and wind is converted into electrical energy. These plants use three-phase generators, typically rated between 50 to 1300 MVA, with terminal voltages ranging from a few kV to 20 kV, depending on the size and age of the units.
The transmission system is designed...
273
Transformers in Distribution System01:27

Transformers in Distribution System

128
Transformers in distribution systems can be broadly categorized into distribution substation transformers and other distribution transformers. They are crucial for stepping down high transmission voltages to levels suitable for distribution and end-user applications.
Distribution substation transformers come in various ratings and typically use mineral oil for insulation and cooling. To prevent moisture and air from entering the oil, some transformers use an inert gas like nitrogen to fill the...
128
Instrument Transformers01:23

Instrument Transformers

109
Instrument transformers, comprising voltage transformers (VTs) and current transformers (CTs), play crucial roles in power substations by providing isolated replicas of current or voltage for measurement and protection purposes. Voltage transformers reduce the primary voltage to levels suitable for relay operation and measurement, while current transformers scale down the primary current. The primary winding of a current transformer often consists of a single turn, achieved by threading the...
109
Primary Distribution01:28

Primary Distribution

128
Primary distribution systems deliver electrical power from substations to consumers through various voltage classes, with 15-kV class voltages being predominant among U.S. utilities. Older 2.5- and 5-kV classes are being replaced by 15-kV primaries, while higher 25- to 34.5-kV classes are used in high-density urban areas and rural regions with long feeders. Three-phase, four-wire multigrounded systems are widely employed for balanced power delivery, using the neutral wire as a grounding point.
128
Distribution Reliability and Automation01:25

Distribution Reliability and Automation

134
Distribution reliability in electrical power systems is critical for ensuring an uninterrupted power supply to consumers at minimal cost. According to IEEE Standard Terms, reliability is the probability that a device will function without failure over a specified time period or amount of usage. For electric power distribution, this translates to maintaining continuous power supply and addressing customer concerns over power outages. Several indices, as defined by IEEE Standard 1366-2012, are...
134
Secondary Distribution01:25

Secondary Distribution

112
Secondary distribution systems provide electrical energy at the utilization voltage levels from distribution transformers to customer meters. Typical secondary voltages in the United States include 120/240 V for residential use, 208Y/120 V for residential and commercial use, and 480Y/277 V for industrial and high-rise commercial use.
In residential areas, 120/240 V single-phase, three-wire service is commonly used for lighting, outlets, and large appliances. Urban areas with high-density loads...
112

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Multi-Parameter Optical Monitoring Solution Applied to Underground Medium-Voltage Electric Power Distribution

Fabio R Bassan1, Joao B Rosolem1, Claudio Floridia1

  • 1CPQD-Research and Development Center in Telecommunications, Campinas 13086-902, SP, Brazil.

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Summary

This study introduces an optical fiber monitoring system for underground power grids using Fiber Bragg Grating (FBG) sensors. The system reliably tracks temperature, current, and other critical parameters, ensuring safer and more efficient power distribution.

Keywords:
FBGdistribution networkmedium voltagemonitoring systemoptical fiberunderground power cables

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Area of Science:

  • Electrical Engineering
  • Materials Science
  • Sensor Technology

Background:

  • Underground power distribution networks require robust monitoring for safe and efficient operation.
  • Traditional monitoring methods may not capture critical parameters like distributed temperature or partial discharges effectively.

Purpose of the Study:

  • To present a multi-parameter optical fiber monitoring solution for underground power distribution networks.
  • To evaluate the performance and robustness of Fiber Bragg Grating (FBG) sensors and radio frequency sensors in a real-world network environment.

Main Methods:

  • Utilized Fiber Bragg Grating (FBG) sensors for distributed temperature, external temperature, and current measurements.
  • Employed radio frequency sensors to detect partial discharges in cable connections.
  • Conducted laboratory characterization and 6-month field testing in an underground distribution network.

Main Results:

  • FBG temperature sensors showed distinct diurnal and seasonal thermal patterns.
  • Measured conductor temperatures indicated a need to reduce maximum current during high-temperature periods, aligning with Brazilian standards.
  • Other sensors successfully detected significant events, including intrusions and liquid level changes.

Conclusions:

  • The developed multi-parameter optical fiber monitoring system is functional and robust for underground power distribution networks.
  • The collected data enables safer operation, optimized capacity, and adherence to electrical and thermal limits.
  • This technology offers a valuable tool for enhancing the reliability and performance of power infrastructure.