基于网络同步的方向过流保护采样值计算  

Calculation of directional over-current protection sampling value based on network synchronization

作　　者：朱重阳[1] 张华[1] 

机构地区：[1]国电南京自动化股份有限公司,南京211100

出　　处：《华电技术》2016年第12期37-38,52,共3页HUADIAN TECHNOLOGY

摘　　要：目前,配电网中不依赖于电压,通过电流的采样值来计算方向过流的方法,对于采样值两端的同步提出了很高的要求。提出通过网络传输来调整电流采样值的同步算法,进而计算电流两端相位差,同时起到方向过流保护的作用。该方案不仅能够很好地解决采样值的同步性,准确判断过流相位,而且避免硬件设计过于复杂,减少方向过流元器件的使用。此方案已在双回线配电系统中得以验证。At present,distribution network is not dependent on the voltage,but through the current sampling value method to calculate the direction of flow,for the sampling values at both ends of the synchronous high demands are put forward.Put forward by network transmission to adjust the current sampling values of synchronization algorithm,phase difference on both ends of the current are calculated,at the same time have the effect of direction over-current protection.This scheme not only can well solve the synchronization of sampling values,accurate judgment flow phase,but also avoid the hardware design is too complicated,reduce the use of direction over-current components.This plan has set up a file in the double circuit line distribution system to test and verify.

关 键 词：采样值同步 方向过流保护 相位差 相位同步 相位失步 

分 类 号：TM733[电气工程—电力系统及自动化]