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首页> 外文会议>9th Power Systems Protection amp; Control Conference >A new hybrid islanding detection method combination of NJSMS and Q-f for islanding detection of microgrids
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A new hybrid islanding detection method combination of NJSMS and Q-f for islanding detection of microgrids

机译：NJSMS和Q-f结合的新型孤岛检测方法用于微电网的孤岛检测

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Microgrids can provide economic and environmental benefits, but their performance poses great technical challenges in control, protection and energy management. Microgrids can be operated either grid-connected or islanded mode. Such dual configuration capability produces challenges on the design of the protection system. Fault current magnitudes will change depending on the microgrid operating mode. this paper proposes a novel hybrid method for islanding detection of microgrids. The proposed method which is a combination of nonlinear jumping Slip mode frequency shift (NJSMS) and reactive power versus frequency (Q-f) as active methods, detects the islanding phenomena by forcing the DG lose its stable operation and drift the frequency out of the normal range of the system frequency. A simple passive islanding detection scheme that relies on system frequency such as under/over frequency protection (UFP/OFP) would be sufficient to detect the moment of islanding. The effectiveness of proposed method is demonstrated and discussed through a comprehensive set of simulation studies conducted in the Matlab/Simulink environment.
机译：微电网可以带来经济和环境效益，但是其性能在控制，保护和能源管理方面提出了巨大的技术挑战。微电网可以并网运行或孤岛运行。这种双重配置功能对保护系统的设计提出了挑战。故障电流的大小将根据微电网的工作模式而变化。本文提出了一种用于微电网孤岛检测的新型混合方法。所提出的方法是将非线性跳跃滑模频率偏移（NJSMS）和无功功率与频率（Qf）结合起来作为主动方法，通过迫使DG失去稳定运行并使频率偏离正常范围来检测孤岛现象。系统频率依靠系统频率的简单无源孤岛检测方案（例如欠频/过频保护（UFP / OFP））就足以检测孤岛的力矩。通过在Matlab / Simulink环境中进行的全面模拟研究，论证并讨论了所提出方法的有效性。

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