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基于脉动高频信号注入的三相与单相系统孤岛检测

Islanding Detection in Three-Phase and Single-Phase Systems Using Pulsating High-Frequency Signal Injection

语言:

中文摘要

本文分析了利用脉动高频信号注入进行孤岛检测的方法。相比传统方案,主动式高频信号注入具有非检测区(NDZ)小、成本低且易于实现的优势。文中重点探讨了该方法在三相及单相系统中的应用,解决了传统旋转高频信号注入仅适用于三相系统的局限性。

English Abstract

This paper analyzes the use of pulsating high-frequency signal injection for islanding detection purposes. Active islanding detection using high-frequency signal injection is an appealing option due to its reduced nondetection zone, reduced cost, and ease of implementation. The use of a rotating high-frequency signal has been reported and analyzed. However, this method can only be applied to three...
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SunView 深度解读

孤岛检测是光伏逆变器并网安全的核心功能。该技术对阳光电源的组串式逆变器(如SG系列)和户用逆变器产品线具有重要价值。通过采用脉动高频信号注入技术,可以显著减小非检测区,提升在弱电网或复杂负载环境下的并网安全性,同时降低对电网阻抗变化的敏感度。建议研发团队在下一代逆变器控制算法中引入该方案,以优化产品在多机并联场景下的孤岛保护性能,进一步满足全球各地区严苛的并网认证标准。