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相关概念视频

Generator Voltage Control01:21

Generator Voltage Control

105
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,...
105
Fast Decoupled and DC Powerflow01:24

Fast Decoupled and DC Powerflow

144
The fast decoupled power flow method addresses contingencies in power system operations, such as generator outages or transmission line failures. This method provides quick power flow solutions, essential for real-time system adjustments. Fast decoupled power flow algorithms simplify the Jacobian matrix by neglecting certain elements, leading to two sets of decoupled equations:
144
Load-frequency control01:28

Load-frequency control

106
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...
106
Multimachine Stability01:25

Multimachine Stability

127
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:
127
Turbine-Governor Control01:17

Turbine-Governor Control

134
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...
134
Control of Power Flow01:30

Control of Power Flow

246
There are several methods to control power flow in power systems:
246

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Experimental Investigation of the Hierarchical Control in DC Microgrids Using a Real-time Simulator
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多目标适应性预测性虚拟同步发电机控制策略,以实现电网稳定性和可再生能源整合.

Mrinal Kanti Rajak1, Rajen Pudur2

  • 1Department of Electrical Engineering, National Institute of Technology Arunachal Pradesh, Yupia, Jote, 791113, Arunachal Pradesh, India. mrinal.phd20@nitap.ac.in.

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概括

一个新的自适应预测虚拟同步发电机 (AP-VSG) 控制提高了可再生能源的电网稳定性. 这种方法可以改善并行连接的发电机的频率调节和故障传输,减少复杂性和损失.

关键词:
适应性控制是适应性的控制.多目标优化多目标优化预测性控制是一种预测性控制.实现可再生能源的整合.智能电网技术是一项智能电网技术.虚拟同步发生器 虚拟同步发生器

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科学领域:

  • 电气工程 电气工程
  • 电力系统 电力系统
  • 整合可再生能源的整合

背景情况:

  • 电网稳定性受到间歇性可再生能源的整合的挑战.
  • 集成自刺激感应发电机 (SEIG) 的传统方法通常涉及复杂的直流转换阶段.
  • 虚拟同步发电机 (VSG) 控制为电网稳定提供了一个有希望的方法,但需要优化并行运行.

研究的目的:

  • 提出一种新的自适应预测虚拟同步发生器 (AP-VSG) 控制策略.
  • 增强电网稳定性,并促进平行连接的SEIG无集成.
  • 通过实现直接交流域并行操作来降低系统复杂性和转换损失.

主要方法:

  • 实现了基于电网频率和频率变化率 (RoCoF) 的实时调整的自适应性惯性 (H) 和缓冲 (D) 机制.
  • 利用多目标预测优化来提高控制性能.
  • 通过与并行连接的2.2kW和5.5kWSEIG进行实验测试来验证战略.

主要成果:

  • 实现了最大RoCoF的56%降低和频率最低点的33%改善.
  • 证明了增强的减压比率 (41%) 和强大的故障通行能力,包括在100ms内恢复电压.
  • 控制力减少了36.7%,同时保持了稳定性边际,并将电流限制在1.5pu.

结论:

  • 拟议的AP-VSG控制策略显著改善了并行连接的SEIG的电网稳定性和频率调节.
  • 与传统方法相比,交流域并行操作有效降低了系统复杂性和转换损失.
  • 实验结果证实了在各种电网干扰下AP-VSG控制的稳定性和有效性.