1、相电压平均值为219.1V ,最小值215.7V,最大值得221.3;相电流平均值为129.1A,最大瞬时电流为331A,电压、电流有效值趋势图如下:(2)相电压、相电流波形如下:红色为电压、绿色为电流(3)相电流、相电压谐波总畸变率相电压谐波总畸变率平均值为2.5%,最大值3.2%;相电流谐波总畸变率平均值52%,最大值69%。相电压、相电流谐波总畸变率趋势图如下:(4)相电压、相电流谐波棒形图如下:(5)部分采样值的电流谐波数据相电流数据表(仅列出主要谐波):时间基波5次7次11次13次A10:06144.958.97432.0239.99818.838907110.642.58121.3
2、468.2956.304208144.255.51727.1111.2488.363609111.346.30124.7099.12666.121510139.861.37233.41210.9049.0871113870.79442.7810.3510.07412111.851.20429.2928.27327.378813137.653.66428.0710.327.705614114.551.29629.1988.35857.213515118.945.53922.8299.15536.65842)1#变压器低压总出线端(测量时间2010年7月7日10:30分-10:40分)(1)相电压
3、、相电流有效值相电压平均值为218.2V ,最小值215.3V,最大值得220.5V;相电流平均值为577.2A,最小瞬时电流为442A; 最大瞬时电流为756A。相电压、相电流有效值趋势图如下:(3)相电压、相电流谐波总畸变率相电压谐波总畸变率平均值为2.4%,最大值3%;相电流谐波总畸变率平均值9.9%,最大值11.3%。(4)相电压、相电流谐波总畸变率棒形图相电流数据表(仅出主要谐波)基波(A)3次(A)5次(A)7次(A)11次(A)13次(A)30:47585.49.366446.83225.7589.951811.12348581.411.62845.34924.41911.047
4、49576.311.52643.22324.2059.220810.37350573.510.32344.1623.5149.7495515809.8645.2424.3611.0252572.79.163245.24323.48110.88153574.610.91743.6724.7089.193654576.911.53843.84424.8079.230410.38455567.410.78142.55523.8319.07849.645856571.411.42846.28323.42710.8573)3#污水泵用变频器进线端(测量时间2010年7月7日10:45分-10:50分)相
5、电压平均值为219.3V ,最小值215.4V,最大值得220V;相电流平均值为239.5A,最小瞬时电流为220A; 最大瞬时电流为266A。相电压谐波总畸变率平均值为4.8%,最大值5.2%;相电流谐波总畸变率平均值36.9%,最大值38.3%。45:36224.74.943475.72427.41317.9767.864537224.85.395274.40927.20118.2097.86838224.23.587274.88327.12818.167.622839224.66.73874.11826.50317.7437.636440224.96.74773.31726.53817.
6、7677.421741225.32.703674.57426.13518.0247.2096426.064272.99543224.15.378473.28126.89217.7047.843544223.66.037274.23526.38517.4417.602445223.56.034575.9927.04417.6577.5994)2#变压器低压总出线端(测量时间2010年7月7日10:52分-10:59分)相电压平均值为220.6V ,最小值217.6V,最大值得224.1;相电流平均值为415.1A,最小瞬时电流为387A; 最大瞬时电流为459A。相电压谐波总畸变率平均值为4.5
7、%,最大值5%;相电流谐波总畸变率平均值21.5%,最大值22.4%。52:411.76.175572.87127.17218.11511.116408.47.351273.10426.95418.37811.43557407.98.15873.42226.92119.17111.01358407.88.971673.81226.91519.16710.60359408.39.390973.08626.94819.59811.02453:00406.88.949672.00427.66219.52610.98401406.410.56671.1227.63518.28802407.79.377
8、171.34826.90818.75410.19303407.49.777672.51726.88818.33310.185044078.95472.03926.45518.31510.1751.3常用谐波治理标准GB/T 14549-1993电能质量公用电网谐波见下表表1公用电网谐波电压(相电压)限值电网标称电压(KV)电压总谐波畸变率(%)各次谐波电压含有率(%)奇次偶次0.385.04.02.063.21.6353.02.41.2661100.8表2 注入公共连接点的谐波电流允许值标准电压(KV)基准短路容量(MVA)谐波次数及谐波电流允许值(A)2357897862261921162824100348.57.1206.46.85.19.34.37.92507.78.83.84.13.15.62.64.75008.15.43.35.92.77509.66.03.7
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