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Real-Time Simulation of Smart DC Microgrid with Decentralized Control System Under Source Disturbances

机译:源扰动下带分散控制系统的智能直流微电网实时仿真

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摘要

Decentralized control of DC microgrid (dc mu G) using hybrid renewable energy sources (RES) and battery energy storage system (BESS) which operate with and without grid-connected mode is proposed in this paper. In dc mu G integrated with multiple RES and BESS, fluctuating output characteristics of the distributed generations (DGs) due to changing input conditions and the dynamic interactions of the source and load interface converters are main factors which cause stability problem of DC bus voltage. Thus, to solve this problem, the decentralized control scheme which uses bus voltage level as communication link in the control law is proposed in this paper. Accordingly, the control method realizes different operating modes based on the available generations and load demand. Maximum power and constant voltage controls schemes are applied in the DGs interfacing control to regulate the power and voltage variations due to changing input conditions. Furthermore, in the control strategy, the source and battery interfacing converters are controlled autonomously using the bus voltage level without any communication. This maintains the reliability and flexibility of the system. The proposed system model is developed with Matlab/Simulink SimPowerSystem and simulated with real-time simulation using OPAL-RT.
机译:本文提出了使用混合可再生能源(RES)和电池储能系统(BESS)在有或没有并网模式下运行的DC微电网(DC mu G)的分散控制。在集成有多个RES和BESS的dc mu G中,由于变化的输入条件以及源和负载接口转换器的动态交互作用引起的分布式发电(DG)的输出特性波动,是导致DC总线电压稳定性问题的主要因素。因此,为解决这一问题,提出了一种在控制律中采用总线电压电平作为通信链路的分散控制方案。因此,该控制方法基于可用世代和负载需求来实现不同的操作模式。 DG接口控制中采用了最大功率和恒定电压控制方案,以调节由于输入条件变化而引起的功率和电压变化。此外,在控制策略中,源和电池接口转换器使用总线电压电平自动控制,而无需任何通信。这样可以保持系统的可靠性和灵活性。所提出的系统模型是使用Matlab / Simulink SimPowerSystem开发的,并使用OPAL-RT进行了实时仿真。

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