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首页> 外文期刊>Electric power systems research >Impact of load dynamics and load sharing among distributed generations on stability and dynamic performance of islanded AC microgrids
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Impact of load dynamics and load sharing among distributed generations on stability and dynamic performance of islanded AC microgrids

机译：负荷动态和分布式发电之间的负荷共享对孤岛式交流微电网稳定性和动态性能的影响

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Microgrids comprising of inverter-interfaced distributed generation (IIDG) units can be subjected to a high penetration level of dynamic induction motor (IM) loads and rectifier interfaced active loads, which may act as constant power loads. Constant power loads present a negative incremental resistance leading to the degradation of stability. Whereas, the highly non-linear IM load, which couples voltage, supply frequency, active power and reactive power dynamics, challenges the stability of islanded AC microgrids (ACMGs). Further, the stability of these microgrids is also affected by the load sharing among IIDG units. To address the aforementioned difficulties, this paper investigates the impact of load dynamics and load sharing among IIDG units on the stability and dynamic performance of islanded ACMGs. To explore this, a full dynamical non-linear state-space model of a studied islanded AC microgrid with both static and dynamic IM loads has been developed in synchronous (DQ) reference frame. The developed non-linear state-space model is linearized around its steady-state operating point to analyze the small-signal stability. Selective modal analysis and time-domain simulation results have been presented to observe the impact of load dynamics as well as load sharing among IIDG units on the stability and dynamic performance of islanded ACMGs. (C) 2017 Elsevier B.V. All rights reserved.
机译：由逆变器接口的分布式发电（IIDG）单元组成的微电网可以承受高渗透水平的动态感应电动机（IM）负载和整流器接口的有功负载，这些负载可以充当恒定功率负载。恒定功率负载呈现负增量电阻，导致稳定性下降。然而，高度非线性的IM负载（耦合电压，电源频率，有功功率和无功功率动态特性）挑战了孤岛式AC微电网（ACMG）的稳定性。此外，这些微电网的稳定性还受到IIDG单元之间的负载分担的影响。为了解决上述困难，本文研究了IIDG机组之间的载荷动态和载荷分担对孤岛ACMG稳定性和动态性能的影响。为了探索这一点，已在同步（DQ）参考框架中开发了具有静态和动态IM负载的已研究孤岛式交流微电网的全动态非线性状态空间模型。将开发的非线性状态空间模型围绕其稳态工作点线性化，以分析小信号稳定性。提出了选择性模态分析和时域仿真结果，以观察负载动态以及IIDG单元之间的负载共享对孤岛ACMG的稳定性和动态性能的影响。 （C）2017 Elsevier B.V.保留所有权利。

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