GE公司变压器保护DTP内部补偿算法的研究

传统的变压器保护通过改变TA接线补偿其接线组别产生的角度误差 ,微机保护则靠其强大的计算能力通过软件算法实现内部补偿 ,从而对TA接线型式无要求。华能德州电厂 2× 6 6 0MW三期工程中 ,GE公司DTP型微机变压器保护得到了广泛的应用。但其说明书中对具体算法原理说明甚少 ,为校验保护性能 ,利用叠加原理及相量计算推导出其算法 ,方便了保护校验及定检。

Study of Inter-Compensating Arithmetic in Digital Transformer Protection from GE Incorporation

Digital protection is deploying its strong computation ability in software algorithm to achieve inter-compensate, while in traditional transformer protection, compensating the angle error created by connection is achieved by changing TA connection type. So digital protection has no requirement on the connection styles. During the third stage of HuaNeng DeZhou electric power plant, a digital transformer protection from GE Incorporation has been widely used. But its manual covers too less about the algorithm details. Here, superposition principle and phasor computation are used to get the details. By this, protection checkout and fix-examine can easily be done.