单相变压器参数测定中试验表计不同接入方式的影响

Influence of different access mode of test meter in single-phase transformer parametric measurement

根据单相变压器空载试验、短路试验与试验表计的特点,从理论上分析了电压表、电流表和功率表的相对位置对试验结果的影响,并依据分析结果设计3种不同接法的试验电路,然后利用简化的电路模型推导出3种不同试验电路所测试验数据的准确性,最后通过试验数据的验证,得出单相变压器空载试验和短路试验表计的正确接法.

On the basis of characteristics of single-phrase transformer＇s no-load test,short circuit and test meter, the influence on test results of the relative position of voltage meter,current meter and power meter,and designed breadboard circuit with three different access modes were analysed theoretically.Then,the accuracy of the test data of the three different breadboard circuits with the simplified circuit model were derived.Finally,by checking the test data, the proper access mode of testing meter of single-phrase transformer＇s no-load test,short circuit test is reached.