Fast and Secure Operation of Voltage Source Inverter based DERs using Model Predictive Droop Control
Fast and Secure Operation of Voltage Source Inverter based DERs using Model Predictive Droop Control
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DOI：
10.1109/ecce.2018.8558323
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发表时间：
2018-09
期刊：
影响因子：
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通讯作者：
W. Alhosaini;M. Mahmud;Yue Zhao
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文献类型：
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作者：
W. Alhosaini;M. Mahmud;Yue Zhao
电网的可靠性可以通过使用微电网（MG）概念来提高，微电网（MG）概念在正常和/或故障条件期间调节公共耦合点（PCC）处的电压和频率。基于下垂特性的分级控制策略通常用于MG中，其中功率转换器可以并联操作。然而，多个控制回路的需要不仅增加了控制器设计的复杂性，而且降低了系统的动态响应。在未来的电力系统中，需要具有快速动态响应的并网变流器来处理分布式能源的高度渗透所引起的不确定性。因此，本文提出了一种新的模型预测控制，以确保快速的动态响应的大功率三电平变换器在独立运行模式，以及并网运行模式。所提出的控制器被应用到MG，其中包括一个太阳能逆变器并联连接的能量存储系统的PCC，其中本地负载被绑。仿真和实验结果表明，快速变化的大气条件下，不同的电网运行模式下，所提出的控制器的鲁棒性和高动态性能。
Reliability of the power grid can be improved by the use of microgrids (MGs) concept, which regulates the voltage and frequency at the point of common coupling (PCC) during normal and/or faulty conditions. Droop characteristics based hierarchical control strategies are commonly used in MGs, where power converters can operate in parallel. However, the need of multiple control loops not only adds complexity to the controller design, but also reduces the dynamic response of the system. In the future power system, grid-tied converters with fast dynamic response are desired to handle the uncertainties induced by high penetration of distributed energy resources. Therefore, this paper presents a novel model predictive control to ensure fast dynamic response of high power three-level converters in stand-alone operating mode as well as grid-tied operating mode. The proposed controller is applied to a MG which consists of a solar inverter connected in parallel with an energy storage system to the PCC, where a local load is tied. Both simulation and experimental results are presented to demonstrate robustness and the high dynamic performance of the proposed controller under rapidly changing atmospheric conditions and different grid operating modes.