Passivity-based coordinated control for islanded AC microgrid
Passivity-based coordinated control for islanded AC microgrid
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DOI：
10.1016/j.apenergy.2018.07.115
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发表时间：
2018-11
期刊：
影响因子：
11.2
通讯作者：
Yonghao Gui;B. Wei;Mingshen Li;J. Guerrero;J. Vasquez
中科院分区：
文献类型：
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作者：
Yonghao Gui;B. Wei;Mingshen Li;J. Guerrero;J. Vasquez
针对包含可再生能源和储能系统单元的孤岛式交流微网，提出了一种新的基于无源性的协调控制策略。其主要优点是，所提出的协调控制策略管理微电网，而不使用锁相环系统。在微电网中，储能系统支持微电网的电压，可再生能源在正常运行时向微电网注入其最大功率。对于储能系统，采用比例谐振控制器;对于可再生能源，采用电压调制直接功率控制方法，不仅具有良好的跟踪性能，而且具有良好的稳态性能。该方法的另一个优点是，当异构可再生能源接入微网时，利用无源性原理可以保证整个微网的渐近稳定性。为了验证所提出的协调控制律，我们使用一个微电网组成的一个储能系统，一个风力涡轮机，一个光伏和两个可控负载。仿真结果表明，与传统的锁相环矢量电流控制方法相比，该方法提高了微网中风电涡轮机和光伏发电的即插即用能力。此外，微电网的电压和频率恢复到其标称值的能量存储系统与所提出的方法。最后，在10 kW微电网系统上对所提出的协调控制算法进行实验验证。实验结果也与仿真结果相吻合。
A novel passivity-based coordinated control strategy is proposed for an islanded AC microgrid including renewable energy source and energy storage system units. The main advantage is that the proposed coordinated control strategy manages the microgrid without using a phase-locked loop system. In the microgrid, the energy storage system supports the voltage of the microgrid, and the renewable energy sources inject their maximum power to the microgrid in the normal operation. For the energy storage system, we use a proportional-resonant controller, and for the renewable energy sources, we use a voltage modulated direct power control method, which has not only a good tracking performance but also a good steady-state behavior. Another advantage of the proposed method is that the asymptotical stability of the whole microgrid can be guaranteed by using the passivity principle when the heterogeneous renewable energy sources are integrated into the microgrid. To validate the proposed coordinated control law, we use a microgrid consisting of one energy storage system, one wind turbine, one photovoltaic and two controllable loads. Simulation results show that the plug-and-play capability of the wind turbine and photovoltaic in the microgrid is enhanced when comparing with the conventional vector current control method with a phase-locked loop system. Moreover, the voltage and frequency of the microgrid are recovered to its nominal value by the energy storage system with the proposed method as well. Finally, experimental verification of the proposed coordinated control algorithm is performed on a 10 kW microgrid system. The experimental results match the simulation ones as well.