在正常和故障条件下对联网风力轮机的PI和模糊逻辑控制器进行比较分析
Mohamed Bahgat1, Mohamed Ezzat1, Mahmoud A Attia2
1Electrical Power and Machines Department, Ain Shams University, Cairo, Egypt.
Scientific reports
|January 14, 2025
概括
模糊逻辑控制 (FLC) 通过改进旋转机侧转换器控制来提高风力轮机的效率. 与优化PI控制器相比,这种方法提供了更高的稳定性和更快的响应,特别是在故障条件下.
科学领域:
- 电气工程 电气工程
- 可再生能源系统可再生能源系统
- 控制系统 控制系统
背景情况:
- 风力轮机,特别是带有双输入感应发电机 (DFIG) 的风力轮机,需要先进的控制系统来实现最佳性能.
- 像比例积分 (PI) 这样的传统控制器在不同的条件下可能会在响应和稳定性方面表现出局限性.
- 提高风能转换的效率和可靠性对于可持续发电至关重要.
研究的目的:
- 增强风力轮机 (WT) 的控制系统,以实现最佳效率和快速响应.
- 实施和评估DFIG的旋翼侧转换器 (RSC) 的模糊逻辑控制 (FLC) 策略.
- 为了比较拟议的FLC与优化的比例积分 (PI) 控制器的性能.
主要方法:
- 实现模糊逻辑控制 (FLC) 的转子侧转换器 (RSC) 的DFIG.
- 优化电网侧转换器 (GSC) 和RSC控制器.
- 使用MATLAB/Simulink模拟在各种风形状和故障条件下进行性能评估.
主要成果:
- 在稳定状态时间,稳定性和精度方面,FLC在优化PI控制器上表现优越.
- FLC实现了显著更好的沉降时间 (14-70%正常,40-70%故障条件),并减少了峰值到峰值的振荡 (30-65%在故障期间).
- 在正常和大多数故障场景下,FLC导致较小的稳定状态误差 (2-4%),表明控制精度提高.
结论:
- 模糊逻辑控制为改善基于DFIG的风力轮机性能提供了强大而有效的解决方案.
- 拟议的FLC方法克服了传统控制器的局限性,从而提高了效率和响应能力.
- 由于其与风特征的兼容性和在动态条件下的有效性,FLC非常适合风能应用.
相关概念视频
Turbine-Governor Control
160
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...
160
Time and frequency -Domain Interpretation of PI Control
104
Proportional-Integral (PI) controllers are essential in many control systems to improve stability and performance. They are commonly used in everyday devices like thermostats to enhance system damping and reduce steady-state error. When the zero in the controller's transfer function is optimally placed, the system benefits significantly in terms of stability and accuracy.
Acting as a low-pass filter, the PI controller slows the system's response and extends settling times. This requires...
Acting as a low-pass filter, the PI controller slows the system's response and extends settling times. This requires...
104
Wind Turbine Machine Models
100
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...
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...
100
Load-frequency control
119
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...
119
PI Controller: Design
199
Proportional Integral (PI) controllers are a fundamental component in modern control systems, widely used to enhance performance and mitigate steady-state errors. They are particularly effective in applications such as automatic brightness adjustment on smartphones, where they excel at mitigating steady-state errors for step-function inputs. Unlike PD controllers, which require time-varying errors to function optimally, PI controllers leverage their integral component to address residual...
199
Generator Voltage Control
118
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,...
118


