相关实验视频
Updated: Jul 18, 2025

09:10
Fabrication and Testing of Microfluidic Optomechanical Oscillators
Published on: May 29, 2014
12.2K
在电力系统中使用先进的信号处理方法进行环境振荡模式评估.
Rahul Satheesh1, Sunitha Rajan2
1Amrita School of Artificial Intelligence, Coimbatore, Amrita Vishwa Vidyapeetham, India.
ISA transactions
|August 25, 2023
概括
本研究引入了一种使用基于时间变异过器的实证模式分解 (TVF-EMD) 和泰格凯泽能源运营商 (TKEO) 来分析电力系统振荡的新方法. 该方法有效地从现实世界的数据中估计机电模式属性,并减少计算负载.
科学领域:
- 电气工程 电气工程
- 电力系统分析 分析 分析
- 信号处理 信号处理
背景情况:
- 精确估计机电模式属性对于电力系统稳定性和操作员意识至关重要.
- 现有的基于测量的方法通常需要大量的计算资源来识别模式和参数估计.
- 现实世界的同步相机 (PMU) 数据为分析系统动态提供了丰富的来源.
研究的目的:
- 开发一种新的,计算效率高的框架,用于评估电力系统中低频振荡模式.
- 使用环境PMU数据准确估计瞬时模式参数 (频率,振幅,减噪比).
- 在合成,模拟和现实世界电网数据上验证拟议的方法的稳定性和有效性.
主要方法:
- 使用非静止方法,基于时间变化的过器的实证模式分解 (TVF-EMD) 技术来识别主导的低频模式.
- 将TVF-EMD与泰格凯泽能源运营商 (TKEO) 结合起来,以精确估计瞬时模式参数.
- 在合成信号,模拟IEEE测试系统和真实世界的印度电网数据上应用和验证拟议的方法.
主要成果:
- 拟议的TVF-EMD和TKEO组合有效地识别了环境PMU数据中的低频振荡模式.
- 即时模式的参数包括频率,振幅和减噪比率都得到了精确估计.
- 在分析模拟和真实世界电力系统数据方面表现出强大的性能.
结论:
- 这种新的框架提供了一个计算效率高和强大的解决方案,用于估计机电模式属性.
- 该方法提供了即时模式特征的准确评估,这对于电力系统的监控和控制至关重要.
- 这种方法提高了运营商使用现实世界同步相仪数据来衡量系统压力的能力.
相关概念视频
Oscillations In An LC Circuit
2.3K
An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by
2.3K
Forced Oscillations
6.6K
When an oscillator is forced with a periodic driving force, the motion may seem chaotic. The motions of such oscillators are known as transients. After the transients die out, the oscillator reaches a steady state, where the motion is periodic, and the displacement is determined.
6.6K
Load-frequency control
191
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...
191
Energy and Power Signals
337
In an electrical system with a resistor, voltage and current signals facilitate the measurement of power and energy across the resistor. For a continuous-time signal, the total energy over a time interval is defined as the integral of the square of the signal's magnitude over that interval. Mathematically, this is expressed as:
337
Frequency-Domain Interpretation of PD Control
139
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...
The proportional control gain, combined with the...
139
Damped Oscillations
5.8K
In the real world, oscillations seldom follow true simple harmonic motion. A system that continues its motion indefinitely without losing its amplitude is termed undamped. However, friction of some sort usually dampens the motion, so it fades away or needs more force to continue. For example, a guitar string stops oscillating a few seconds after being plucked. Similarly, one must continually push a swing to keep a child swinging on a playground.
Although friction and other non-conservative...
Although friction and other non-conservative...
5.8K

