CAJ | 학술논문

指出了电子式互感器(ET)接入的线路光纤差动保护在数据同步方面遇到的主要困难,分析了全球定位系统(GPS)同步方法与传统数据同步方法的局限.提出了利用改进插值法进行数据同步的新方法.该方法不依赖于任何外部设备,可靠性高;不调整采样时刻,适应于IEC 60044-8标准规定的合并单元功能结构条件,并能灵活适用于线路一侧为ET一侧为传统互感器的情况.数据同步的目标始终是要保证参加差动运算的电压电流量追溯到一次侧是同一时刻的,为此,各侧ET二次变送延时的影响必须被计及到保护装置的数据同步过程之中.对保护装置而言,补偿两侧ET二次变送延时的时间差是数据同步的核心内容.对需要配置光纤差动保护的线路,ET的合并单元最好能够提供符合IEC 60044-8标准的数据输出接口.
지출료전자식호감기(ET)접입적선로광섬차동보호재수거동보방면우도적주요곤난,분석료전구정위계통(GPS)동보방법여전통수거동보방법적국한.제출료이용개진삽치법진행수거동보적신방법.해방법불의뢰우임하외부설비,가고성고;불조정채양시각,괄응우IEC 60044-8표준규정적합병단원공능결구조건,병능령활괄용우선로일측위ET일측위전통호감기적정황.수거동보적목표시종시요보증삼가차동운산적전압전류량추소도일차측시동일시각적,위차,각측ET이차변송연시적영향필수피계급도보호장치적수거동보과정지중.대보호장치이언,보상량측ET이차변송연시적시간차시수거동보적핵심내용.대수요배치광섬차동보호적선로,ET적합병단원최호능구제공부합IEC 60044-8표준적수거수출접구.
The major difficulties encountered during the data synchronization process of optical fiber differential protection connected with electronic transformers (ET) are pointed out, and the shortcomings of GPS and traditional data synchronization methods are analyzed. In addition, a new data synchronization method employed with improved inserting is proposed. The method depends not on any peripheral equipment and has high reliability. It doesn' t need to adjust the sampling time in compliance with the function and frame condition of merged unit (MU) specified in standard IEC 60044-8,and it can be applied flexibly to the case that one side connected with ET and other side with traditional transformer. This paper shows that the target of data synchronization is to ensure that voltage and current value in the differential calculation are simultaneously traced back to primary side. Therefore, the secondary transform delay of ET at every side must be accounted in protection data synchronization process. As for the protection, compensation of time difference of the secondary transform delay at two sides of ET is the core content of data synchronization. For the line, which needs to use optical fiber differential protection, the MU of the ET may provide better data output interface according with standard IEC 60044-8.