正弦拟合法在中性点非直接接地系统中的应用  

Application of Sine Curve Fitting Algorithm to Neutral Point Indirect Grounding System

作　　者：靳建峰[1] 王毅[1] 刘忠菁[1] 翁利民[2] 霍小江[1] 陈新军[1] 

机构地区：[1]郑州电力高等专科学校,河南郑州450004 [2]武汉大学电气工程学院,湖北武汉430072

出　　处：《水电能源科学》2007年第4期148-151,共4页Water Resources and Power

摘　　要：叙述了正弦曲线拟合算法的基本概念,结合电力系统现场运行、设计的特点和资料,介绍了正弦曲线拟合的基本概念。阐述了用正弦曲线拟合三采样值计算电流、电压、功率(有功、无功)、功率因数、故障距离等电气量的计算方法以及应注意的问题。通过计算有效值的具体实例,证明了该算法的正确性,具有硬件简单、测量精度高、反应速度快等特点,望在电力系统中发挥作用。The article describes the basic conception of sin curve fitting algorithm in terms of actual operating , designing trait and information. It explains computing method and noticing questions of current, voltage and power, power factor and fault distance ,etc ,by applying the sine curve algorithm to simulate three sampling value. By calculating valid value of electric quantum ,its correctness is proved by actual examples. The algorithm＇s hardware is simple ,measure precision is high and velocity is rapid. The paper hopes that the algorithm bring into action in electric power system.

关 键 词：正弦曲线拟合算法 采样值 中性点非直接接地 电气量 

分 类 号：TM727[电气工程—电力系统及自动化] TP274[自动化与计算机技术—检测技术与自动化装置]