电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2015年
15期
73-78
,共6页
智能变电站%电子式互感器%采样同步%埃特金插值%误差分析
智能變電站%電子式互感器%採樣同步%埃特金插值%誤差分析
지능변전참%전자식호감기%채양동보%애특금삽치%오차분석
digital substation%electronic transformer%sampling synchronization%Aitken interpolation%error analysis
分析了电子式互感器数据同步采样方面的问题，指出了二次插值理论和三次样条插值理论同步算法的不足。只有当数据采样频率较高时，才能使二次插值误差精度得到明显提高。三次样条插值的边界问题使计算过程变得复杂、计算量显著增大。提出了一种基于改进的三阶埃特金插值理论的同步算法，并对该算法的误差进行了理论分析和仿真。仿真验证结果与理论分析基本吻合。不同运行状态下，基波和各次谐波幅值及相角误差精度均满足IEC60044-8标准规定。改进后的三阶埃特金插值计算量小、精度高，在微机测量装置中易于实现，适于实际应用。
分析瞭電子式互感器數據同步採樣方麵的問題，指齣瞭二次插值理論和三次樣條插值理論同步算法的不足。隻有噹數據採樣頻率較高時，纔能使二次插值誤差精度得到明顯提高。三次樣條插值的邊界問題使計算過程變得複雜、計算量顯著增大。提齣瞭一種基于改進的三階埃特金插值理論的同步算法，併對該算法的誤差進行瞭理論分析和倣真。倣真驗證結果與理論分析基本吻閤。不同運行狀態下，基波和各次諧波幅值及相角誤差精度均滿足IEC60044-8標準規定。改進後的三階埃特金插值計算量小、精度高，在微機測量裝置中易于實現，適于實際應用。
분석료전자식호감기수거동보채양방면적문제，지출료이차삽치이론화삼차양조삽치이론동보산법적불족。지유당수거채양빈솔교고시，재능사이차삽치오차정도득도명현제고。삼차양조삽치적변계문제사계산과정변득복잡、계산량현저증대。제출료일충기우개진적삼계애특금삽치이론적동보산법，병대해산법적오차진행료이론분석화방진。방진험증결과여이론분석기본문합。불동운행상태하，기파화각차해파폭치급상각오차정도균만족IEC60044-8표준규정。개진후적삼계애특금삽치계산량소、정도고，재미궤측량장치중역우실현，괄우실제응용。
The problem of synchronous data acquisition in the electronic transformer is analyzed. Meanwhile, the deficiencies of the synchronous data acquisition of the quadratic interpolation and cubic spline interpolation are pointed out. The accuracy of error is clearly insufficient in the quadratic interpolation with low sampling frequency. However, the boundary conditions of cubic spline interpolation significantly increase the amount of computation. The synchronous data acquisition based on the advanced third-order Aitken interpolation theory is put forward, and the error is theoretically analyzed and simulated. The result of simulation is matched with the theoretical analysis. Under the various atmospheres, the fundamental and the harmonic amplitude and phase angle’s error follows the standard of IEC60044-8. The advanced Aitken interpolation with higher precision and less simulation is easy to implement in the microcomputer measurement device, adapted to practical applications.
