Coordinated Microgrid Frequency Regulation Based on DFIG Variable Coefficient Using Virtual Inertia and Primary Frequency Control
Coordinated Microgrid Frequency Regulation Based on DFIG Variable Coefficient Using Virtual Inertia and Primary Frequency Control
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DOI：
10.1109/tec.2016.2537539
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发表时间：
2016-03
影响因子：
4.9
通讯作者：
Jingjing Zhao;Xue Lyu;Yang Fu;Xiaoguang Hu;F. Li
中科院分区：
文献类型：
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作者：
Jingjing Zhao;Xue Lyu;Yang Fu;Xiaoguang Hu;F. Li
提出了一种双馈感应发电机（DFIG）与柴油发电机协同参与风电/光伏/柴油微网调频的变系数虚拟惯量与一次频率相结合的控制策略。分析了在不同风速下，对应的惯性控制参数不同时，系统的频率响应特性.通过风力发电控制和桨距角控制，保持10%的风电裕度，以抵消临时额外功率浪涌后风电输出功率的下降，并为微电网提供永久的频率支持。在不同的风速下，下垂控制增益设置的影响也被示出。通过根据风速变化连续调整控制参数，实现了变系数法。该方法可以保证该策略在时变条件下的有效实施。最后，这种协调控制策略进行了测试，在存储独立的微电网与太阳能，风能和柴油发电机。
This paper proposes a variable coefficient combined virtual inertia and primary frequency control strategy for doubly fed induction generators (DFIG) in coordination with diesel generator to participate in wind/photovoltaic/diesel microgrid frequency regulation. The frequency response characteristic is analyzed under different wind speeds with corresponding inertia control parameters different. A 10% wind power margin is preserved through overspeed control and pitch angle control to offset the decrease of wind output power after temporary extra power surge, and provide a permanent frequency support for microgrids. The influence of droop control gain setting is also illustrated under different wind velocities. By continuously adjusting the control parameters according to wind speed variation, a variable coefficient method is realized. The method can guarantee an efficient implementation of this strategy in time-varying conditions. Finally, this coordinated control strategy is tested in a storage-independent microgrid with solar, wind, and diesel generators.