对于VSG MMC-HVDC集成海上风电场的高频振荡抑制策略,考虑频率合
Haichang Sun1,2, Weiwei Yao2,3, Hailang Shi1,2
1School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China.
Sensors (Basel, Switzerland)
|March 14, 2026
概括
在海上风电场的虚拟同步发电机 (VSG) 控制可以导致高频振荡. 这项研究发现了一种新的频率合效应,并提出一个带停止波器,以有效地抑制这些振荡.
科学领域:
- 电气工程 电气工程
- 电力系统工程 电力系统工程
- 整合可再生能源的整合.
背景情况:
- 与MMC-HVDC系统集成的海上风电场使用虚拟同步发电机 (VSG) 控制来提供主动支持.
- VSG控制可以引入传统稳定性分析无法预测的高频振荡.
- 由于无地址的频率合,现有的抑制振荡的方法对于VSG控制的系统是不够的.
研究的目的:
- 揭示和分析VSG控制的MMC-HVDC海上风电场中的高频频率合效应.
- 为了确定这种合的根本原因,特别是不对称的控制和控制延迟.
- 提出一个有效的抑制振荡的战略.
主要方法:
- 分析风力轮机电网侧转换器 (GSC) 和VSG控制的风电场侧MMC (WFMMC) 之间的频率合效应.
- 确定VSG控制不对称性和控制延迟作为关键合因素.
- 在WFMMC电压采样循环中开发和模拟带停止波器抑制策略.
主要成果:
- 发现了一种新的高频范围频率合效应,与传统的V-f控制系统不同.
- 不对称的VSG控制结构和控制延迟被证实是这种合的主要驱动因素.
- 时间域模拟验证了拟议的带停止波器策略在抑制振荡方面的有效性.
结论:
- 识别的频率合是VSG控制的海上风电场的一个关键问题.
- 拟议的带停止波器策略有效地减轻了由这种合引起的高频振荡.
- 这项研究为加强集成电网的海上风电系统的稳定性提供了一条途径.
更多相关视频
11:44Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators
Published on: August 15, 2014
10.8K
06:51Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
Published on: August 21, 2018
7.5K
相关概念视频
01:24Fast Decoupled and DC Powerflow
799
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:
799
01:22Full wave rectifier
3.2K
A full-wave rectifier is a device that converts alternating current (AC) to direct current (DC) and is more efficient than its half-wave counterpart. It typically includes a center-tapped transformer, two diodes, and a load resistor. The secondary winding of the transformer is divided to provide two equal voltages of opposite polarities, which is the pivotal element of full-wave rectification.
3.2K
01:21Generator Voltage Control
726
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, use...
726
01:17Magnetic Damping
1.2K
Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
1.2K
01:30Oscillations In An LC Circuit
3.3K
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
3.3K
01:28Load-frequency control
732
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...
732