阻抗匹配平衡变压器差动保护技术及应用  

Technology and application of impedance matching balance transformer differential protection

作　　者：马水生 张亮 李延军[2] 徐冰[2] 

机构地区：[1]许继电气公司,河南许昌461000 [2]北京铁路局石家庄供电段,河北石家庄050000

出　　处：《电力系统保护与控制》2011年第6期140-143,共4页Power System Protection and Control

摘　　要：介绍了电气化铁道阻抗匹配平衡变压器的平衡匹配机制原理,并进一步就平衡匹配关系数学模型的搭建和变压器高低压侧电流变化的规律进行了推理分析。解析了差动保护在阻抗匹配平衡变压器中如何实现以及铁路电气化差动保护在实现过程中为防止误动作所增加的一些判据。阻抗匹配平衡变压器在电气化铁路建设中广泛应用,其差动保护逻辑和判据已完全由微机来实现,所提的计算方法和理论研究对于阻抗匹配平衡变压器保护设备的开发和应用具有较高的实用价值。This paper introduces the principle of balance matching mechanism of the electric railway impedance matching balance transformer,and for further,the building of the mathematical model of balance matching relations and the law of current change between high and low pressure side,how to achieve differential protection in impedance matching balance transformer and some criterion added in the realization of railway electrification process in order to prevent malfunction are analyzed.Impedance matching balance transformer is widely used in electrification of railway construction,and its logic and criteria of differential protection has been achieved entirely by computer.The proposed calculation method and theoretical study have high practical value for the development and application of impedance matching balance transformer protection equipment.

关 键 词：差动保护 阻抗匹配 平衡 负载 励磁涌流 比率制动特性 

分 类 号：TM772[电气工程—电力系统及自动化]