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The Development of a Coordinated Anti-Islanding Protection for Collector Systems With Multiple Distributed Generation Units

机译:具有多个分布式发电机组的集热系统协调抗孤岛保护的发展

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This paper presents a coordinated anti-islanding protection for collector systems with multiple distributed generation units (DGUs). The presented anti-islanding protection is established based on processing the d−q-axis components of the instantaneous three phase apparent powers (sd and sq) determined at the point-of-common-coupling using the wavelet packet transform (WPT). Processing sd and sq by using WPT allows the extraction of low- and high-frequency sub-band contents. The contents of the high-frequency sub-band are used to detect and distinguish islanding events, and contents of the low- and high-frequency sub-bands are employed to define a coordination index, which is used to identify the islanded DGU(s). The presented anti-islanding protection is implemented for off-line testing using data obtained from a laboratory collector with four different DGUs. Off-line test results demonstrate accurate, fast, and reliable responses to islanding and nonislanding event(s), and accurate identification of islanded DGUs along with negligible sensitivity to levels of power delivery to the collector system.
机译:本文提出了针对具有多个分布式发电单元(DGU)的集热系统的协调防孤岛保护。提出的防孤岛保护是基于使用小波包变换(WPT)处理在公共耦合点确定的瞬时三相视在功率(sd和sq)的d-q轴分量而建立的。通过使用WPT处理sd和sq可以提取低频和高频子带内容。高频子带的内容用于检测和区分孤岛事件,低频和高频子带的内容用于定义协调索引,用于识别孤岛DGU )。所提出的防孤岛保护功能是使用从实验室采集器中获得的具有四个不同DGU的数据进行离线测试而实现的。离线测试结果显示出对孤岛和非孤岛事件的准确,快速和可靠的响应,对孤岛DGU的准确识别以及对向收集器系统供电的敏感度可忽略不计。

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