基于子机间同步技术的变压器就地化差动保护方案

Implementation Scheme of Outdoor Installation Transformer Different Protection Based on Inter-computer Synchronization Technology

就地化变压器保护,即各保护子机集成主后备一体化保护功能,根据间隔配置保护子机,子机之间采用高可靠无缝冗余(HSR)双向环形高速网络交互数据。理论分析表明:相较于传统变压器保护,就地化变压器保护在可靠性和快速性方面具有一定的优势。但是在实际运行过程和中国电科院动模测试过程中均出现变压器保护各子机差动保护动作行为不一致情况,各子机差动保护动作时间差最大可达到20 ms左右,有较明显的缺点。提出了基于子机间同步技术的变压器就地化差动保护方案,解决各子机差动保护动作行为不一致的问题,为变压器保护就地化的推广提供有益帮助,实现了就地化变压器差动保护的冗余配置,保证了可靠性。

In order to make the transformer protection outdoor installation,an implementation scheme of distributed transformer protection is proposed in this paper.Distributed sub protection machines, which transfer data between each other through the high-availability seamless redundancy(HSR) bidirectional ring network,are installed for each switch of transformer.Each side sub machine integrates the main and backup protection function. After an analysis of the overall scheme.Theoretical analysis and experimental data show that, distributed sub protection machines may operate at different time.In this paper a new method based on the operation flag sync is proposed.