| 引用本文: | 王 博,赵海森,李和明,罗应立,张 虹.电动机微机自动测试系统测试误差分析及改进方法[J].电力自动化设备,2014,34(6): |
| WANG Bo,ZHAO Haisen,LI Heming,LUO Yingli,ZHANG Hong.Analysis of measurement error for electric motor test system and countermeasures[J].Electric Power Automation Equipment,2014,34(6): |
|
| 摘要: |
| 从系统测量精度的角度出发，研究非标设备对电压、电流、电功率等电气量测试误差的影响。结果表明，测试系统有功功率测试误差为电压、电流、功率因数及采样环节测试误差之和，且标称相对误差会随被测电气量的减小而增大。在此基础上，提出互感器在全量程范围内进行变比、相位修正措施，以及消除因频率波动引起计量误差的解决方案。试验结果表明，电机负荷高于20 % 时，有功功率测试误差可由1.2 % 降低至0.35 %。 |
| 关键词: 电动机 互感器 自动测试 测量误差 误差分析 功率测量 数据采集 |
| DOI： |
| 分类号: |
| 基金项目: |
|
| Analysis of measurement error for electric motor test system and countermeasures |
|
WANG Bo, ZHAO Haisen, LI Heming, LUO Yingli, ZHANG Hong
|
|
State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources，
North China Electric Power University，Beijing 102206，China
|
| Abstract: |
| The influence of non-standard equipment on the measurement error of electrical variables such as voltage，current and power is studied from the aspect of system measurement accuracy，which shows that，the system measurement error of active power is the measurement error sum of voltage，current，power factor and sampling loop，and the nominal relative error increases along with the decrease of electrical variables. The measures to correct the transformer ratio and phase covering full measurement range and the solution to eliminate the measurement error caused by frequency deviation are proposed. Experimental results show the system measurement error of active power decreases from 1.2 % to 0.35 % when the load of electric motor is higher than 20 %. |
| Key words: electric motors electric transformers automatic testing measurement errors error analysis power measurement data acquisition |
