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Related Concept Videos

Turbine-Governor Control01:17

Turbine-Governor Control

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Turbine-governor control is crucial for maintaining power system stability by balancing turbine mechanical power output with electrical load demand. This mechanism ensures that generator frequency and rotor speed are within acceptable limits during load variations. Turbine-generator units store kinetic energy due to their rotating masses; this energy is released to meet the load requirement when the load increases. The electrical torque of turbines rises to meet the demand, whereas the...
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Wind Turbine Machine Models01:24

Wind Turbine Machine Models

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In the growing field of wind energy, incorporating wind turbine models into transient stability analysis is essential. Induction and synchronous machines are the primary models used, with induction machines being prevalent due to their simplicity and reliability.
Induction machines interact through the rotating magnetic field generated by the stator and the rotor. The key parameter is slip, which is the difference between synchronous speed and rotor speed relative to synchronous speed. Slip is...
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Generator Voltage Control01:21

Generator Voltage Control

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Generator voltage control is crucial for maintaining the stable operation of synchronous generators and wind turbines. In older models, a DC generator driven by the rotor delivers DC power to the rotor's field winding, and the power is transferred through slip rings and brushes. In the latest models, static or brushless exciters are used. Static exciters rectify AC power from the generator terminals and then transfer the DC power directly to the rotor. Brushless exciters, on the other hand,...
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Load-frequency control01:28

Load-frequency control

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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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Generation of Three-Phase Voltage01:21

Generation of Three-Phase Voltage

388
A three-phase AC generator has a rotor with a rotating magnet placed within the stator mounted with the stationary three-phase winding to generate three-phase voltages via mutual induction. These windings are evenly distributed around the inner circumference of the stator and are arranged 120 electrical degrees apart. Three-phase stator windings consist of three separate coils or groups of coils, known as phases, each connected in Y (star) configuration or Delta configuration.
As the rotor...
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DC Generator01:19

DC Generator

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An alternator converts mechanical energy into electrical energy that varies sinusoidally, resulting in AC current. Meanwhile, a DC generator converts mechanical energy into electrical energy, which are DC pulses with the same polarity. The construction of a DC generator is similar to that of an alternator, except that the pair of slip rings is replaced by a single split ring, also called a commutator. The commutator functions like a periodic rotary switch; it changes the contacts with the...
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Design and Implementation of an Online Efficiency-Optimized Multi-Functional Compensator for Wind Turbine Generators.

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  • 1Applied Power Electronics Systems Research Group, Department of EE, CEECS, National United University, Miaoli City 36063, Taiwan.

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Summary

This study introduces a multifunctional wind turbine generator intelligent compensator (WTGIC) to manage unpredictable wind power flow. The WTGIC enhances power system stability and efficiency by integrating energy storage and advanced control for renewable energy integration.

Keywords:
energy storage unit (ESU)power quality (PQ)power semiconductor device (PSD)renewable energy (RE)wind turbine generator (WTG)

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Area of Science:

  • Electrical Engineering
  • Renewable Energy Systems
  • Power Electronics

Background:

  • Growing integration of wind power presents challenges due to unpredictable generator output.
  • Dynamic power flow from wind turbine generators (WTGs) can negatively impact existing power grids.
  • Need for advanced solutions to manage and compensate for wind power fluctuations.

Purpose of the Study:

  • To propose a multifunctional WTG intelligent compensator (WTGIC) for advanced power management.
  • To enhance the stability and efficiency of power systems with significant WTG penetration.
  • To address the unpredictable nature of wind power generation.

Main Methods:

  • Development of a WTGIC comprising a power semiconductor device (PSD)-based bidirectional inverter and an energy storage unit (ESU).
  • Implementation of a modularized all-digital control scheme integrating various control functions and algorithms.
  • Design and implementation of an online efficiency optimization algorithm and associated controllers.

Main Results:

  • The WTGIC demonstrates high-efficiency charging/discharging of the ESU.
  • Real-time power quality (PQ) compensation and efficient power smoothing of WTGs are achieved.
  • Simulations in PSIM and a hardware experimental system validated the WTGIC's effectiveness.

Conclusions:

  • The proposed WTGIC effectively manages dynamic power flow from wind turbines.
  • The system enhances power quality and grid stability in renewable energy-integrated power systems.
  • The modular design and digital control scheme offer flexibility and improved performance.