电压不平衡度的准同步采样快速测量方法

发布时间：2018-03-28 06:24

本文选题：电压不平衡度　切入点：相序分量　出处：《仪器仪表学报》2015年03期

【摘要】：采用IEC 61000-4-27所推荐方法进行电压不平衡度测量时,复杂的开方运算是不可避免的。提出一种电压不平衡度的准同步采样快速测量方法,该方法首先采用准同步采样算法计算三相电压相量(幅值和初相角),然后利用几何原理将开方运算转化为三角函数计算,并最终利用代数多项式简化三角函数式,实现电压不平衡度的快速、准确测量。与IEC 61000-4-27所推荐方法相比,提出的电压不平衡度的准同步采样快速测量方法避免了傅里叶变换和复杂的开方运算,减少了运算量。仿真和实际测量结果表明,电压不平衡度的准同步采样快速测量方法与IEC 61000-4-27所推荐方法具有相同的测量准确度,为电压不平衡度的快速测量提供新的思路。
[Abstract]:Complex square operation is inevitable when using the method recommended by IEC 61000-4-27 to measure voltage unbalance. A fast quasi-synchronous sampling method for measuring voltage unbalance is proposed. In this method, the quasi-synchronous sampling algorithm is used to calculate the three-phase voltage phasor (amplitude and initial phase angle), then the square operation is transformed into trigonometric function calculation by geometric principle, and the trigonometric function formula is simplified by algebraic polynomial. Compared with the method recommended by IEC 61000-4-27, the proposed fast quasi-synchronous sampling method avoids Fourier transform and complex square operation. The simulation and actual measurement results show that the fast measurement method of voltage imbalance has the same accuracy as that recommended by IEC 61000-4-27, which provides a new idea for the fast measurement of voltage unbalance.
【作者单位】：湖南大学电气与信息工程学院;湖南省计量检测研究院;
【基金】：国家自然科学基金(61370014)资助项目
【分类号】：TM933.2

【共引文献】