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Related Concept Videos

Secondary Distribution01:25

Secondary Distribution

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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...
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Power System Distribution01:25

Power System Distribution

961
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...
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Pilot and Numeric Relaying01:21

Pilot and Numeric Relaying

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Pilot relaying is a type of differential protection used in power systems. It compares electrical quantities at the terminals of equipment via a communication channel instead of direct relay interconnection. This method is essential for transmission lines where the terminals are far apart, typically up to 80 km for lines with 69 to 115 kV ratings. Four types of communication channels are used for pilot relaying:
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Three-Phase Circuits01:22

Three-Phase Circuits

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AC power distribution systems have three categories: single-phase, two-phase, and three-phase systems. The single-phase circuit, common in residential settings, typically employs a two-wire system connecting a single AC source to various loads. These circuits support standard household appliances operating at 120 volts (V) and 240 V, such as lamps, televisions, and microwaves. The first generators, Niagara Falls hydro plant installed in 1895, were two-phase and designed by Nikola Tesla. The...
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Multimachine Stability01:25

Multimachine Stability

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Multimachine stability analysis is crucial for understanding the dynamics and stability of power systems with multiple synchronous machines. The objective is to solve the swing equations for a network of M machines connected to an N-bus power system.
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
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Power System Three-Phase Short Circuits01:21

Power System Three-Phase Short Circuits

473
Determining the subtransient fault current in a power system involves representing transformers by their leakage reactances, transmission lines by their equivalent series reactances, and synchronous machines as constant voltage sources behind their subtransient reactances. In this analysis, certain elements are excluded, such as winding resistances, series resistances, shunt admittances, delta-Y phase shifts, armature resistance, saturation, saliency, non-rotating impedance loads, and small...
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Related Experiment Video

Updated: Dec 26, 2025

Experimental Investigation of the Hierarchical Control in DC Microgrids Using a Real-time Simulator
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A Multi-User, Single-Authentication Protocol for Smart Grid Architectures.

Ahmed S Alfakeeh1, Sarmadullah Khan2, Ali Hilal Al-Bayatti2

  • 1Faculty of Computing and Information Technology, King Abdulaziz University, Jeddah 21589, Saudi Arabia.

Sensors (Basel, Switzerland)
|March 18, 2020
PubMed
Summary
This summary is machine-generated.

A new group authentication algorithm enhances smart grid security by protecting demand-response data from tampering. This method improves efficiency and access control for utility servers and smart grid devices.

Keywords:
authenticationsecret session keysmart grid

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Area of Science:

  • Computer Science
  • Electrical Engineering
  • Cybersecurity

Background:

  • Smart grid systems rely on data from devices for energy distribution and balancing.
  • Data traversing from devices to utility servers are vulnerable to tampering attacks, risking energy disruption.
  • Authentication is crucial for device and server integrity and preventing malicious data manipulation.

Purpose of the Study:

  • To propose a group authentication algorithm for preserving demand-response security in smart grids.
  • To introduce a fine-grained access control mechanism for utility servers.
  • To enhance the efficiency and security of data exchange in smart grid environments.

Main Methods:

  • Development of a group authentication algorithm for smart grid security.
  • Implementation of a fine-grained access control feature for utility servers.
  • Security analysis through formal and informal methods to test resilience against attacks.

Main Results:

  • The proposed algorithm successfully authenticates devices and utility servers, preventing tampering.
  • Subsequent authentications within a group reduce computational and communication overheads.
  • Faster establishment of secret session keys for secure information exchange.

Conclusions:

  • The group authentication algorithm effectively preserves demand-response security in smart grids.
  • The mechanism provides efficient authentication and fine-grained access control.
  • The algorithm demonstrates resilience against various security threats.