电子式互感器在数字化变电站中的应用

Application of Electronic Transformers in Digital Substation

由于电力系统对设备小型化、智能化、可靠性的要求越来越高,而常规互感器的绝缘结构复杂、体积庞大、造价高昂、磁饱和、铁磁谐振、动态范围小,故从标准、定义、结构性能、试验等方面对比介绍了电子式互感器,指出其优良的绝缘性能和暂态特性、高可靠性高、小体积、低造价等特点,还介绍了当前国内外电子式互感器的主要型式、应用时的优缺点,指出电原理的电子式互感器能满足实际运行要求。最后阐述了它在数字化变电站中应用的原则和方案,指出电子式互感器的采用,将给国内乃至国际变电站,尤其是超高压及特高压变电站的自动化运行和管理带来深远的影响和变革,具有非常重大的技术和经济意义。

The requirements of miniaturized, intelligentized, high security electric power equipments are higher in power system, but the routine transformer has complex insulation configuration, big solidity and high price, it also has some disadvantages like magnetism saturation, resonance, and small dynamic range. The new electronic transformer is expounded here about its standard, definition, frame, performance, and routine test, the compare of electronic transformer with routine transformer shows that electronic transformer has obvious advantages such as good insulation, good transient performance, high security, small solidity, and low price. The currently main types of electronic transformers inland and overseas are described here, the virtues and disadvantages of them in application are also described, it is pointed that the electronic transformer with electricity theory can satisfy the need of practice. The principle and scheme of electronic transformer application in digital substation are analyzed here, it is pointed that for automatization of substation, especially for EHV and UHV substation, application of electronic transformer will leads deep effect and revolution, which have very important technical and economic significance.