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arXiv 2007.11776eess.SYcs.SY
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电池驱动电压源型变换器的电网耦合动态响应

Grid-Coupled Dynamic Response of Battery-Driven Voltage Source Converters

Ciaran Roberts, Jose Daniel Lara, Rodrigo Henriquez-Auba, Bala Kameshwar Poolla, Duncan S. Callaway

摘要:

随着人们对逆变器供电的孤岛微电网的兴趣越来越大,特别是对恢复能力的兴趣越来越大,了解这些系统的动态行为变得越来越重要。本文从整体上看,电网形成转换器,并考虑控制方法建模和调节直流链路电压时,直流电源是电池储能系统。我们特别感兴趣的是了解这些控制器的性能,受大负载变化,直流侧电容值的减少。我们考虑的第四,第二,零阶模型的电池,并建立零阶模型捕获的动态感兴趣的时间尺度考虑干扰检查。此外,我们适应网格搜索优化的DC/DC控制器的控制器参数,并显示如何列入AC侧测量到DC/DC控制器可以提高其动态性能。在给定可容许的DC电压瞬态偏差的情况下,性能的这种改进提供了减小DC侧电容的机会,从而潜在地允许部署更可靠的电容器技术。

英文摘要:

With the increasing interest in converter-fed islanded microgrids, particularly for resilience, it is becoming more critical to understand the dynamical behavior of these systems. This paper takes a holistic view of grid-forming converters and considers control approaches for both modeling and regulating the DC-link voltage when the DC-source is a battery energy storage system. We are specifically interested in understanding the performance of these controllers, subject to large load changes, for decreasing values of the DC-side capacitance. We consider a fourth, second, and zero-order model of the battery; and establish that the zero-order model captures the dynamics of interest for the timescales considered for disturbances examined. Additionally, we adapt a grid search for optimizing the controller parameters of the DC/DC controller and show how the inclusion of AC side measurements into the DC/DC controller can improve its dynamic performance. This improvement in performance offers the opportunity to reduce the DC-side capacitance given an admissible DC voltage transient deviation, thereby, potentially allowing for more reliable capacitor technology to be deployed.

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