应用微机校定三相变压器的联结组及标号

三相变压的联结组标号对其正常运行极为重要，必须校定，而目前变还缺少全面快捷的校定方法和设备。本文介绍采用微机系统来实现联结组桔的校定，首先把四类联结组差别区分开，然后分析指出同一类联结组中，除有六种正序标号外，存在六种逆序标号，提出用新的筛选法能简捷地判别校定同一类的十二种标号，当微机系统进行实际测试时，必须考虑电源电压三相不对称程序的影响，故经数学推导得出用实测计算值代替理想计算值作判别比较的基

APPLYING THE COMPUTER TO VERIFY THE CONNECTION GROUP SYMBOLS OF THE THREE PHASE TRANSFORMER

It is very important the connection group symbols of the three phase transformer for itsnormal running. So it must be verified. However, it is short of overall and quick verifiedmethod and device. This article will introduce how to verify the symbol of connection groupby the computer system.First it should be distinguished among four-type connection groups, then authors anal ysed and pointed: there are not only six kinds of positive phase sequence symbols. but also sixkinds of negative phase sequence symbols in the same connection group. It is indicated thatone can easily verify twelve kinds of symbols of the same type by this screening method.When measured by computer system, it must be considered the effect of asymmetry ofthe power's three phase voltage. So during the process of verifying. we use the calculated value by measuring instead of ideal calculated value. According to the mentioned 'method thecomputer program have been made and a block diagrem of the program is given. The combi nation of hardware with software had been tested, it is clarified that all the connection groupsymbols can be verified and got the results quickly and correctly.