【摘要】 配电网中配电变压器的监测已经成为配电自动化系统中的一个重要组成部分,但是如何充分利用已收集到的配变监测历史数据对其运行优劣情况进行科学的评价仍然是一个急待解决的问题。首先从配变监测系统的海量历史负荷信息中计算出表征配变优劣运行的多项运行参数指标,然后针对评价指标数据中庞大的数据空间以及数据之间的相关性而不易进行综合评价的缺点,运用改进主成分分析法,经过矩阵变换,在保留运行参数数据主要信息的基础上去除数据间的相关性,降低评价配变的指标维数,提炼出反映配变优劣运行的主要特征,获得配电变压器运行的综合评价指标,为配变的运行、管理、状态监测与诊断提供有效的评价。一个现场的实例验证了所提方法的有效性。更多还原

【Abstract】 The monitoring system for distribution transformer has become an important part of the distribution automation system.However,how to make use of the historical data to evaluate distribution transformer’s optimal operation is still an urgent problem to be solved.This paper calculates many indices of the operational parameters from massive historical loading data to evaluate the distribution transformer’s operational status.Moreover,this paper makes use of the indices and applies the modified principal component analysis(PCA) to evaluate the optimal operation states,which can reduce the dimensions of the indices through matrix conversion,abstract the principal components.It can provide the effective evaluation for the operation,management,status monitoring and diagnosis of the distribution transformers.The practical example shows that the proposed method is effective.更多还原