摘要
双馈感应风力发电机组(Doubly-Fed Induction Generator,DFIG)现有的基于最大风功率追踪的控制策略不能对系统频率的变化作出响应。大量基于DFIG的风电场并入电网并取代传统的同步发电机组,将降低系统的频率控制能力。首先分析了风力发电穿透率对系统频率控制能力的影响;其次研究了DFIG附加'虚拟'惯性控制环的频率响应,分析了桨距角控制参与系统一次调频的能力;最后设计了一种新的复合频率控制方法,该方法通过'虚拟'惯性控制和桨距角频率控制的共同作用,降低了系统频率的初始变化率及稳态偏差。仿真结果验证了所提控制策略的有效性。
The existing control strategy based on maximum wind power tracking of Doubly-fed Induction Generators （DFIG） can not response to the deviation of the system frequency. A large number of DFIG-based wind farms taking the place of conventional synchronous generators will decrease the control ability of the system frequency. First, the impact of the wind penetration on the controllability of the system frequency is analyzed. Then, the response of the virtual inertia control loop and the pitch angle control used for primary frequency regulation are introduced in detail. Finally, a new composite frequency control strategy is proposed, which can decrease the initial rate of change and the steady-state error of the system frequency through the combination of the virtual inertia control and the pitch angle control. The simulation results demonstrate the effectiveness of the approach.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2012年第8期20-24,29,共6页
Power System Protection and Control
基金
国家自然科学基金项目(50807015
50977028)
中央高校基本科研业务费专项资金资助~~
关键词
双馈感应发电机
风力发电
频率控制
惯性控制
桨距角控制
doubly-fed induction generator （DFIG）
wind power generation
frequency regulation
inertia control
pitch angle control
