数字化保护无效数据闭锁机制  

Blocking mechanism of digital protection with invalid data

作　　者：洪毅文 

机构地区：[1]中山供电局,广东中山528400

出　　处：《电力系统保护与控制》2010年第20期228-231,共4页Power System Protection and Control

摘　　要：介绍了现阶段数字化保护处理电流、电压等采样数据的通用方法,分析了目前采用的无效数据闭锁机制所存在的弊端,及其可能导致保护拒动等方面的危害。通过研究IEC60044-8规范中的数据帧格式,提出了将不同保护所需的通道数据进行分别对应的解决方案。以实际工程为例,介绍了现阶段数字化保护处理电压、电流采样数据时普遍采用的方法,通过分析其无效数据闭锁机制所存在的问题,提出了一套针对数字化母线保护、主变保护、线路保护的无效数据闭锁机制,完善地解决了数字化变电站各类保护对无效数据的防误闭锁问题,确保了保护的可靠性。This paper introduces the universal methods of the current and voltage data acquisition in digital protection system,analyzes the drawbacks of the invalid data latching mechanism at the present stage,which may lead to protection failure.Aiming at this problem,a solution of matching the channel data to the corresponding ptotection is provided by researching the data frame format of IEC60044-8.Taking an actual project as an example,through introducing the above methods and analyzing the problems existing in the invalid data latching mechanism,a new latching mechanism aiming at digital busbar protection,transformer protection,line protection is presented,which can solve the problem about all kinds of anti-mislock invalid data issues in digital substation protection perfectly,and ensure the reliability of protection.

关 键 词：数字化保护 无效数据 通道数据 闭锁 机制 

分 类 号：TM76[电气工程—电力系统及自动化]