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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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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.
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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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The analysis of suspension bridges is a complex and critical process that involves multiple factors, including the shape and tension of the main cables. The main cables of suspension bridges are subjected to distributed loads, which result in changes in tensile forces and deformation of the cable. These loads must be carefully considered to ensure that the bridge is safe and capable of supporting the weight of different loads.
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Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
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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.
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Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment
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Uplink NOMA-MIMO Systems with Rayleigh Power Distribution.

Mikhail Bakulin1, Taoufik Ben Rejeb1, Vitaly Kreyndelin1

  • 1Moscow Technical University of Communications and Informatics (MTUCI), Moscow 111024, Russia.

Sensors (Basel, Switzerland)
|June 10, 2022
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Summary

Multiple-input multiple-output (MIMO) systems can function in overloaded mode, behaving like non-orthogonal multiple access (NOMA) systems. Statistical simulations confirm the viability of MIMO systems operating under these conditions.

Keywords:
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Area of Science:

  • Wireless Communication
  • Signal Processing

Background:

  • Multiple-input multiple-output (MIMO) systems are integral to modern wireless communications.
  • Overloaded MIMO systems exhibit characteristics similar to non-orthogonal multiple access (NOMA) systems.

Purpose of the Study:

  • To analyze the performance of MIMO systems operating in an overloaded mode.
  • To investigate the potential of MIMO systems as NOMA systems.

Main Methods:

  • Statistical computer simulation.
  • Analysis of the capacity of a discrete-continuous multiuser MIMO uplink channel.

Main Results:

  • The study demonstrates that MIMO systems can effectively operate in an overloaded state.
  • The capacity analysis provides evidence for the feasibility of overloaded MIMO systems.

Conclusions:

  • MIMO systems can be effectively utilized in overloaded scenarios, offering NOMA-like functionality.
  • The findings support the practical application of overloaded MIMO systems in wireless networks.