Adaptive coordinated damping control strategy for grid-connected direct-driven wind turbine system with energy storage-based virtual synchronous generators

被引：0
|
作者：
Jin M. [1 ]
Wang T. [1 ]
Huang S. [1 ]
Wang K. [2 ]
Chi F. [2 ]
Li L. [2 ]
机构：
[1] State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing
[2] Dispatch and Control Center of State Grid Shaanxi Electric Power Company, Xi'an
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2021年 / 41卷 / 10期
关键词：
Coordinated control; Damping; Direct-driven wind turbine; Energy storage; Linear parameter varying; Low frequency oscillation; Sub-synchronous oscillation; Virtual synchronous generator;
D O I：
10.16081/j.epae.202110011
中图分类号：
学科分类号：
摘要：
The flexible control characteristics of the energy storage-based VSG (Virtual Synchronous Generator) can provide effective frequency and voltage support for the grid-connected wind power system. However, the system oscillation characteristics will be affected to some extent, and the change of operation point caused by the time-varying output characteristics of wind power will also cause insufficient adaptability of the fixed parameter damping control. Therefore, an adaptive coordinated damping control strategy is proposed to adapt to the time-varying characteristics of wind power output. Firstly, the linear parameter varying model is derived based on the state space model of grid-connected wind power system. The active power of direct-driven wind turbine is taken as the scheduling variable and the operation space range is determined according to the stability region. Then, the operation space is divided according to the gap metric, the typical operation points of each sub-operation space are determined and taken as the vertices of polytope, and the mapping relationship between the scheduling gain and the system operation conditions and the controller is established. Finally, an adaptive controller is designed for different frequency oscillation modes. Simulative results of the test system show that the adaptive coordinated damping controller can not only damp the sub-synchronous oscillation and low frequency oscillation simultaneously in the grid-connected energy storage-based VSG system, but also maintain a good damping level under a wide range of time-varying operating conditions of wind power output. © 2021, Electric Power Automation Equipment Press. All right reserved.
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页码：170 / 177and191
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