基于Matlab仿真的閃變儀自校驗(yàn)及誤差校正研究
高燕1,吳陽(yáng)2
1 東南大學(xué) 電氣工程學(xué)院,江蘇 南京 210096; 2 沭陽(yáng)縣供電公司,江蘇 沭陽(yáng) 223600
摘 要:為提高閃變儀的測(cè)量精度,在介紹IEC閃變儀的測(cè)量原理及短時(shí)閃變嚴(yán)重度計(jì)算方法的基礎(chǔ)上,論述了閃變儀的數(shù)字化實(shí)現(xiàn)模型及PID自校驗(yàn)控制算法的實(shí)現(xiàn),并采用統(tǒng)計(jì)排序法計(jì)算短時(shí)閃變嚴(yán)重度。針對(duì)不同波動(dòng)頻率下短時(shí)閃變嚴(yán)重度的測(cè)量誤差引入多項(xiàng)式擬合校正,Matlab仿真結(jié)果表明,引入多項(xiàng)式擬合校正方法明顯提高了閃變儀的檢測(cè)精度。
關(guān)鍵詞:閃變;短時(shí)閃變嚴(yán)重度;自校驗(yàn);誤差校正
中圖分類號(hào):TM933 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1007-3175(2013)02-0035-05
Research on Self Checking and Error Correction of Flicker Meter Based on Matlab Simulation
GAO Yan1, WU Yang2
1 School of Electric Engineering, Southeast University, Nanjing 210096, China;
2 Shuyang Power Supply Corporation, Shuyang 223600, China
Abstract:In order to improve the measurement precision of the flicker meter, on the basis of the IEC flicker meter measurement principle and the calculation methods of the short-term flicker severity, this paper discussed the model of digital flicker meter and the PID self-checking control algorithm, at the same time, the short-term flicker severity was calculated with statistic sequence. In allusion to the measurement error of the short-term flicker severity in different fluctuation frequency, polynomial fitting correction method was introduced and verified by the Matlab simulation experiment.
Key words: flicker; short-term flicker severity; self checking; error correction
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