|
|||||
|
|
| 变压器保护励磁涌流识别方法的研究 | |
| 引用本文： | 张晓东,卢启付,程养春.变压器保护励磁涌流识别方法的研究[J].广东电力,2012,25(6):15-18,23. |
| 作者姓名： | 张晓东 卢启付 程养春 |
| 作者单位： | 1. 广东电网公司佛山供电局,广东佛山,528200 2. 广东电网公司电力科学研究院,广东广州,510080 3. 新能源电力系统国家重点实验室,北京,102206 |
| 摘 要： | 在介绍和分析变压器励磁涌流产生原因和机理、励磁涌流特点、目前保护装置中常用的几种制动原理的基础上,重点介绍了二次谐波制动中存在的问题,提出了几种增强变压器保护励磁涌流识别能力的新措施,包括:调整差动电流来改善分相制动;增加涌流浮动门槛定值功能;通过算法来捕捉二次谐波数据的趋势判据;在差动保护装置中增加自适应短时投入的循环闭锁功能。这些措施能够有效消除原有二次谐波制动的不足,大大提高了变压器保护的安全性和灵敏性。 |
| 关 键 词： | 励磁涌流 谐波制动 变压器保护 差动电流 |
Research on Recognition Method for Excitation Surge Current Protection of Transformer |
|
| ZHANG Xiaodong , LU Qifu , CHENG Yangchun.Research on Recognition Method for Excitation Surge Current Protection of Transformer[J].Guangdong Electric Power,2012,25(6):15-18,23. | |
| Authors: | ZHANG Xiaodong LU Qifu CHENG Yangchun |
| Affiliation: | 1. Foshan Power Supply Bureau of Guangdong Power Grid Corporation, Foshan, Guangdong 528200, China; 2. Electric Power Research Institute of Guangdong Power Grid Corporation, Guangzhou, Guangdong 510080, China; 3. State Key La- boratory of Alternate Electric Power System with Renewable Energy Sources, Beijing 102206, China) |
| Abstract: | On the basis of introducing and analyzing cause, mechanism of surge current and several braking principles of cur rent protective devices, the paper mainly introduces existing problems in secondary harmonic brake and proposes new ures for enhancing recognition capability of excitation surge current protection of transformer： improve phasic braking by adjusting differential current; add value fixing function of floating threshold of surge current; capture the trend criterion of secondary harmonic data by means of algorithm; equip the differential protection device with self-adaptive cycling locking. These measures can handle disadvantages of secondary harmonic braking and greatly improve safety and flexibility of trans- former protection. |
| Keywords: | excitation surge current harmonic braking transformer protection differential current |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |