摘 要
随着全球能源结构转型的加速，新能源发电技术在电力系统中的渗透率持续提升，然而其并网运行中面临的孤岛效应问题已成为制约系统稳定性和安全性的重要因素。孤岛效应不仅可能导致设备损坏，还可能对维护人员造成威胁，因此亟需开发高效、可靠的检测与保护技术。本研究旨在深入探讨新能源并网场景下的孤岛效应机理，并提出一种基于智能算法的主动检测方法，以实现快速、精准的孤岛状态识别。通过构建多维度特征提取模型，结合改进型自适应谐波注入策略，该方法能够显著提升检测灵敏度和抗干扰能力。同时，研究设计了一套集成化的保护方案，能够在检测到孤岛效应后迅速采取隔离措施，确保系统的安全运行。实验结果表明，所提出的检测方法在不同负载条件下均表现出优异的性能，其检测时间较传统方法缩短了约30%，误检率降低了近50%。
关键词：孤岛效应 新能源并网 智能算法
Abstract
With the accelerating transformation of the global energy structure, the penetration rate of new energy generation technologies in power systems continues to increase. However, the islanding effect encountered during grid integration has become a critical factor constraining system stability and safety. The islanding effect not only poses a risk of equipment damage but also threatens the safety of maintenance personnel, thus necessitating the development of efficient and reliable detection and protection technologies. This study focuses on exploring the mechanism of the islanding effect in the context of new energy grid integration and proposes an active detection method based on intelligent algorithms for rapid and precise identification of islanding states. By constructing a multi-dimensional feature extraction model combined with an improved adaptive harmonic injection strategy, this method significantly enhances detection sensitivity and anti-interference capability. Additionally, an integrated protection scheme is designed to promptly implement isolation measures upon detecting the islanding effect, ensuring safe system operation. Experimental results demonstrate that the proposed detection method exhibits superior performance under various load conditions, reducing detection time by approximately 30% compared to traditional methods while lowering the false detection rate by nearly 50%.
Keyword:Island Effect New Energy Grid Connection Intelligent Algorithm
目 录
引言 1
1孤岛效应的基本原理与特性分析 1
1.1孤岛效应的定义与分类 1
1.2孤岛效应对电网的影响分析 2
1.3孤岛效应的产生机制研究 2
1.4孤岛效应检测的关键挑战 3
2孤岛效应检测技术的研究现状 3
2.1主动检测技术的原理与应用 3
2.2被动检测技术的特点与局限性 3
2.3混合检测技术的优势与实现方法 4
2.4新型检测技术的发展趋势 4
3孤岛效应保护策略的设计与优化 5
3.1保护策略的基本框架构建 5
3.2快速保护算法的研究与实现 5
3.3分布式电源系统的保护需求分析 6
3.4保护策略的性能评估与改进方向 6
4孤岛效应检测与保护技术的实际应用 7
4.1实际案例中的孤岛效应分析 7
4.2检测与保护技术的工程实现方案 7
4.3系统仿真与实验验证过程 7
4.4技术应用中的问题与改进建议 8
结论 8
参考文献 10
致谢 11
