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Related Concept Videos

Control of Power Flow01:30

Control of Power Flow

717
There are several methods to control power flow in power systems:
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Maximum Power Transfer01:16

Maximum Power Transfer

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Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...
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Power System Distribution01:25

Power System Distribution

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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.
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Maximum Power Flow and Line Loadability01:23

Maximum Power Flow and Line Loadability

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The maximum power flow for lossy transmission lines is derived using ABCD parameters in phasor form. These parameters create a matrix relationship between the sending-end and receiving-end voltages and currents, allowing the determination of the receiving-end current. This relationship facilitates calculating the complex power delivered to the receiving end, from which real and reactive power components are derived.
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Load-frequency control01:28

Load-frequency control

692
Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...
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Frequency-Domain Interpretation of PD Control01:24

Frequency-Domain Interpretation of PD Control

397
Proportional-Derivative (PD) controllers are widely used in fan control systems to improve stability and performance. A fan control system can be effectively represented using a Bode plot to illustrate the impact of a PD controller through its transfer function. The Bode plot visually conveys how PD control modifies the fan's response across various frequencies, providing a frequency domain interpretation of the controller's behavior.
The proportional control gain, combined with the...
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Related Experiment Video

Updated: Feb 24, 2026

Effective Analysis of Human Exposure Conditions with Body-worn Dosimeters in the 2.4 GHz Band
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Channel Deviation-Based Power Control in Body Area Networks.

Son Dinh Van, Simon L Cotton, David B Smith

    IEEE Journal of Biomedical and Health Informatics
    |August 23, 2017
    PubMed
    Summary
    This summary is machine-generated.

    Novel adaptive power control protocols for body area networks (BANs) reduce signal loss and extend wearable device life. These flexible schemes enhance energy efficiency and reliability for remote health monitoring applications.

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    Area of Science:

    • Wireless communication
    • Biomedical engineering
    • Signal processing

    Background:

    • Internet-enabled Body Area Networks (BANs) are crucial for remote health monitoring and assisted living.
    • Off-body BAN channels face challenges like deep fading due to body shadowing and multipath fading, impacting device performance.
    • Dynamic human activities introduce significant channel variations.

    Purpose of the Study:

    • To develop novel adaptive power control protocols for BANs.
    • To enhance energy efficiency and signal reliability in wearable devices.
    • To reduce outage probability in off-body BAN communication.

    Main Methods:

    • Implementing adaptive power control protocols based on channel deviation.
    • Dynamically adjusting power based on real-time channel variations.
    • Evaluating protocol performance against traditional and existing schemes.

    Main Results:

    • Proposed schemes significantly reduce outage probability.
    • Achieve substantial energy savings, reducing average transmit power.
    • Demonstrate improved signal reliability across various human activities.

    Conclusions:

    • The novel adaptive power control protocols are effective for BAN applications.
    • These protocols offer flexibility and simplicity for resource-constrained hardware.
    • They provide a practical solution for prolonging wearable device lifetime and ensuring reliable communication.