摘要
分布式发电系统要求具有孤岛检测的功能,通常采用带有正反馈扰动的孤岛检测算法。分布式发电系统的孤岛检测性能与系统稳定性之间存在矛盾。文章通过分布式发电系统的小信号模型,分析了带正反馈反孤岛控制时系统的稳定性。通过分析正反馈反孤岛增益与系统功率传输能力以及系统最大功率传输限与孤岛检测时间之间的关系,说明了主动相位偏移反孤岛算法有关参数对系统稳定性及系统功率传输能力的影响,为设计反孤岛算法的参数及确定系统最大功率传输能力提供了依据。
Islanding detection is required for distributed generator system, and usually an islanding detection algorithm with positive-feedback perturbation is adopted. There is a conflict between islanding detection performance and system stability. This paper analyzes the impact of positive-feedback control on system stability according to the small signal model of distributed generator. Through analyzing the relationship between positive-feedback anti-islanding gain and system power transfer capability and the relationship between maximum power transfer level and islanding detection time, illustrates the parameter impact of active phase shift anti-islanding algorithm on system stability and power transfer capability, and provides a reference for the parameter design of anti-islanding algorithm and the determination of system maximum power transfer capability.
出处
《电工技术学报》
EI
CSCD
北大核心
2013年第6期232-237,共6页
Transactions of China Electrotechnical Society
关键词
分布式发电系统
孤岛检测
小信号模型
稳定性
最大功率传输
Distributed generator system
islanding detection
small signal model
stability
maximum power transfer
