Performance of ROCOF relays for embedded generation applications

被引：72

作者：

Affonso, CM

Freitas, W

Xu, W

da Silva, LCP

机构：

[1] Univ Estadual Campinas, Dept Energy Syst & Control, BR-13081970 Campinas, SP, Brazil

[2] Univ Alberta, Dept Elect & Comp Engn, Edmonton, AB T6G 2V4, Canada

来源：

IEE PROCEEDINGS-GENERATION TRANSMISSION AND DISTRIBUTION | 2005年 / 152卷 / 01期

关键词：

D O I：

10.1049/ip-gtd:20041079

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 [电气工程]; 0809 [电子科学与技术];

摘要：

The performance characteristics of rate of change of frequency (ROCOF) relays for embedded generation islanding detection are investigated. The concepts of detection-time versus power-imbalance curve and critical power imbalance are proposed. These concepts are employed to determine the factors that may affect the islanding detection capability of ROCOF relays. The factors analysed are voltage-dependent loads, load power factor, generator inertia constant, feeder length and X/R ratio and multi-embedded generators. In addition, false operation due to faults on adjacent feeders is investigated. The results show that ROCOF relays may become ineffective for islanding detection if the power imbalance in the islanded system is smaller than 15%. In addition, these devices have a high risk of false operation.

引用

页码：109 / 114

页数：6

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