考虑负荷最大概率分布与故障风险的配电变压器优选方法  

Optimal Selection Method of Distribution Transformer Considering Maximum Probability Distribution Characteristics and Fault Risk

作　　者：陈磊 姜飞[1] 涂春鸣[2] CHEN Lei;JIANG Fei;TU Chunming(School of Electrical and Information Engineering,Changsha University of Science&Technology,Changsha 410004,Hunan Province,China;School of Electrical and Information Engineering,Hunan University,Changsha 410082,Hunan Province,China)

机构地区：[1]长沙理工大学电气与信息工程学院,湖南省长沙市410004 [2]湖南大学电气与信息工程学院,湖南省长沙市410082

出　　处：《电网技术》2021年第3期1109-1116,共8页Power System Technology

基　　金：国家自然科学基金项目(51707014);湖南省教育厅科研项目(17C0040);长沙理工大学科研项目(SJCX201946)。

摘　　要：针对我国农网较多居民变压器长期轻载运行、损耗偏大的问题,在保证设备可靠运行的前提下,提出了一种考虑负荷最大概率分布与故障风险成本的配变优选方法。首先,通过考虑配变的经济运行区间及台区负荷的分布情况,对比分析了传统配变选型方法和文中所提选型方法的差异;建立了一种综合考虑配变负载最大概率分布特征、故障概率和额定容量的故障风险成本模型,并基于此,构建了考虑选型故障风险成本的配变全寿命周期成本(lifecyclecost,LCC)模型。最后,通过对某地区10kV配电网变压器选型的实例测算,验证了所提方法的经济性和正确性。In view of the long-term light load operation and great loss of many residential transformers in the rural power grid in China,on the premise of ensuring the reliable operation of the equipment,this paper puts forward a distribution transformer optimization method considering the load maximum probability distribution and the fault risk cost.First of all,by considering the economic operation range of the distribution transformer and the load distribution in the substation area,the paper compares and analyzes the differences between the traditional distribution transformer selection method and the selection method proposed in this paper;a fault risk cost model is established comprehensively considering the maximum probability distribution characteristics of distribution transformer load,the fault probability and the rated capacity;on this basis,a distribution transformer model totally considering the fault risk cost of selection life cycle cost(LCC)is constructed.Finally,the economy and correctness of the proposed method are verified by the calculation of an example of a 10 k V distribution network transformer selection.

关 键 词：配电变压器 负荷最大概率分布 故障风险成本 全寿命周期成本 

分 类 号：TM721[电气工程—电力系统及自动化]