摘要
简要介绍了基于IEC61850协议的数字化变电站分层分布式网络架构,强调了数字站与常规站中变压器保护所应用的交流采样系统在设备组成、信号传输方式、传输介质等方面存在的差异。在此基础上,详细分析了数字化变电站中变压器保护在变压器某侧一次设备检修的特殊运行方式下,出现保护闭锁问题的成因,阐述了在保护软件方面对这一问题的解决方案。所提方案已在河北名府数字化变电站中得到实际应用,运行结果证明了该方案的可行性和有效性。
In this paper, a brief introduction is given to the hierarchical distributed network architecture of digital substation based on IEC 61850 protocols. And the differences of AC sampling systems for transformer protection are pointed out, which exist in the equipments compositions, information transmission modes and transmission medium between the traditional substation and digital substation. By taking the special operation mode when primary main equipments are in maintenance into comprehensive consideration, the reason for blocking problem happened in transformer protections is analyzed detailedly in digital substation. Finally, a modification scheme is proposed to solve this phenomenon for the transformer protections in digital substation, and the solutions have been applied in Mingfu digital substation project in Hebei power grid. According to the actual operation results, the validity and feasibility of the scheme have been proved.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2010年第8期134-136,共3页
Power System Protection and Control
