A New Method of Early Short Circuit Detection

• 作者: Feng Du Michael Anheuser Weigang Chen Yue Zhuo
• 来源期刊: 电力能源(英文)
• 学科: 医学
• 关键词: EARLY SHORT Circuit DETECTION ZONE Selective INTERLOCKING Instantaneous Protection
• 年，卷（期）: 2014,（4）
• 页码范围: 432-427
• 页数: 6页
• 分类号: R73

摘要

To reduce the pressure on contacts and circuit breaker and realize the zone selective interlocking (ZSI) function above the instantaneous protection threshold (e.g., >10In), the short circuit current needs to be early detected. The state-of–art of early short circuit detection (ESCD) method is reviewed. Based on the equivalent model of the short circuit, a new method based on the current and its integration is proposed. The prospective current value can be detected in the early stage of the short circuit. According to the evaluation result, the short circuit current can be early forecasted with the proposed method.