电力系统的变压器微机保护研究

随着电力规模的不断扩张,作为电网核心设备的变压器如何保障其正常运行成为研究的重要课题。在简要介绍了当前变压器微机保护的发展概况后,从纵联差动保护原理出发,提出了一套基于双DSP结构的微机保护方案,并从总体规划、信号采集、硬件抗干扰和软件设计等角度对系统的设计过程进行了详细的分析。实验表明:剩磁的大小与饱和时间成反比,而饱和时间的增大对变压器保护是有利的。

Computer Protection of Transformer in Power System

With the continuous expansion of the power scale,as the core equipment,the power transformer has become an important research subject to ensure their normal operation.After briefly introduced the development of microprocessor-based protection profiles transformer,the paper presents a structure based on dual DSP microprocessor-based protection scheme from the longitudinal differential protection.And then,it analyzes design process in details from the overall planning,data acquisition,hardware and software design.Experiments show that the size and the saturation remanence of time inversely proportional to the saturation time of increased protection is beneficial to the transformer.