集成光伏、全尺寸风力发电机组和电池储能的弱并网混合系统的动态分析与稳定性增强

IF 7.9 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Mohammad Adnan K. Magableh;Amr Ahmed A. Radwan;Yasser Abdel-Rady I. Mohamed
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引用次数: 0

摘要

集成光伏发电(pv)、全尺寸风力涡轮机(WTs)和电池储能系统(bess)的混合发电系统由于其提高的效率和可靠性,在公用事业规模的并网应用中获得了极大的兴趣。然而,在电压源转换器直流侧整合这些资源的混合系统中,直流链路的稳定性在现有文献中仍未得到充分研究,特别是在弱电网条件下以及PV、WT和BESS的不同运行区域。本文采用详细的状态空间和增量阻抗模型对混合PV-WT-BESS系统进行了全面的小信号稳定性分析。分析表明,当光伏发电运行在限流区域时,混合系统在弱电网条件下表现出低频振荡不稳定性。引入了一种新的主动阻尼策略来减轻这些不稳定性,有效地抑制负相互作用动力学并提高整体系统稳定性;这是通过重新定位不稳定的特征模态和重塑直流连杆动力学以符合奈奎斯特稳定性准则来实现的。所提出的补偿技术具有以下几个主要优点:1)它简单有效,可以使用线性分析方法进行设计;2)在不改变稳态性能的前提下,保证了系统在不同电网条件下的稳定运行;3)提高了低压穿通能力;4)与其他稳定方法相比,它不需要额外的测量传感器,从而简化了实施并降低了成本。离线和实时软件在环仿真验证了所开发模型和动态交互的准确性,以及所提出的主动稳定方法在典型操作条件下的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dynamic Analysis and Stability Enhancement of a Weak Grid-Tied Hybrid System Integrating PV, Full-Scale Wind Turbine, and Battery Storage
Hybrid generation systems integrating photovoltaics (PVs), full-scale wind turbines (WTs), and battery energy storage systems (BESSs) have garnered substantial interest for utility-scale grid-tied applications due to their enhanced efficiency and reliability. However, in a hybrid system integrating these resources at the dc-side of a voltage-source converter, the dc-link stability remains largely unexplored in existing literature, particularly under weak grid conditions and across different operational regions of the PV, WT, and BESS. This article presents a comprehensive small-signal stability analysis of a hybrid PV-WT-BESS system using detailed state-space and incremental impedance models. The analysis reveals that the hybrid system exhibits low-frequency oscillation instability in weak grid conditions when the PV operates in the current-limited region. A novel active damping strategy is introduced to mitigate these instabilities, effectively suppressing negative interaction dynamics and improving overall system stability; this is achieved by repositioning unstable eigenmodes and reshaping the dc-link dynamics to comply with the Nyquist stability criterion. The proposed compensation technique offers several key advantages: 1) it is simple yet effective and can be designed using linear analysis methods; 2) it ensures stable operation under varying grid conditions without altering steady-state performance; 3) it enhances the low-voltage ride-through capability; and 4) it eliminates the need for additional measurement sensors, thereby simplifying the implementation and reducing costs compared to alternative stabilization methods. Offline and real-time software-in-the-loop simulations validate the accuracy of the developed models and dynamic interactions, as well as the effectiveness of the proposed active stabilization approach across typical operating conditions.
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CiteScore
13.50
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