基于数据驱动的配电变压器容量在线校正方法

On-line Correcting Method of the Distribution Transformer Capacity Based on Data-driven

为了提高配电系统的管理水平及优化策略的准确性,需对配电变压器容量进行核实,而依靠人工方式核实配电变压器容量耗时、耗力,因此提出了基于配电变压器历史运行数据驱动的变压器容量校正模型。首先,采用线索二叉树建立配电变压器群拓扑关系,利用相关系数法区分不同联结组别的配电变压器,并采用具有较高精度的链式评估方法建立整个模型的评估流程;然后根据Dyn11配电变压器短路阻抗和Yyn0配电变压器零序阻抗与标准参考值的对比结果,实现配电变压器容量的在线评估。测试算例表明:采用所提方法,同一条线路不同联结组别的配电变压器容量校正准确率可达到100%;所提出的方法能够有效性实现配电变压器容量的校正,且可适用于在运的配电变压器大规模推广与应用。论文研究可为配电变压器容量校正提供参考。

In order to improve the management of distribution system and the accuracy of optimization strategy,it is necessary to correct the capacity of distribution transformers.Moreover,it is time-consuming and laboursome to correct the distribution systems transformer capacity in artificial way.Hence,based on the analysis of the on-line operation data,an on-line data-driven model,which is used to detect the capacity of distribution transformer,was proposed in this paper.First,a high precision chain evaluation method was proposed to resolve the model,where the threaded binary tree was utilized to establish the topology relationship of distribution transformer group,and the distribution transformer with different joint groups was distinguished by correlation coefficient method.Then,the short circuit impedance of Dyn11 distribution transformer and the zero sequence impedance of Yyn0 distribution transformer were calculated and compared with the standard reference value.Therefore,the online evaluation of the distribution transformer capacity was realized.The results of test examples show that,when adopting the proposed method the correction rate of capacity correction of distribution transformers in the same feeder with different connection groups can reach 100%;the proposed method can effectively detect the transformer capacity of the distribution systems,and it can be applied to the large-scale on-line transformers in the distribution systems.The research results can provide a reference for the capacity correcting of distribution transformers.