基于“即插即用”的智能变压器差动保护系统研究

Y. Xing, Feng Hou, Pei-Lin Wu, Yanrong Mao, S. Yin, Ying-yu Wang
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引用次数: 0

摘要

为了更好地实现变压器的差动保护,提出了基于“即插即用”的智能变压器差动保护系统的研究。在硬件方面,采用“即插即用”实现差动保护的连接。根据IEC 60870-5-104传输协议,建立变压器与差动保护装置之间的通信,实现验证后信息的相互传递。在软件方面,通过信息自动校验来完成从主站到变电站、从变电站到差动装置的信息自动校验业务。在介绍电流差动保护基本原理的基础上,介绍了制动量,分析了速比差动保护的判据。差动保护装置采集被检信息,A/D转换后计算涌流的二次谐波,完成差动保护。试验结果表明,该系统具有较高的信息自动检查效率和比率差动保护运行效率,能较好地完成智能变压器的差动保护。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Research on Intelligent Transformer Differential Protection System Based on "Plug and Play"
In order to realize the differential protection of transformer better, the research of intelligent transformer differential protection system based on "plug and play" is put forward. In the aspect of hardware, "plug and play" is used to realize the connection of differential protection. According to IEC 60870-5-104 transmission protocol, the communication between transformer and differential protection device is established to realize the mutual transfer of information after verification. In the aspect of software, the information automatic checking service from main station to substation and from substation to differential device is accomplished by information automatic checking. On the basis of the basic principle of current differential protection, the brake quantity is introduced and the criterion of ratio differential protection is analyzed. The differential protection device is used to collect the checked information, and the secondary harmonic of the inrush current is calculated after A/D conversion to complete the differential protection. The test results show that the system has higher information automatic check efficiency and ratio differential protection operation efficiency, and can better complete the differential protection of intelligent transformer.
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