引用本文:龚方亮,牟龙华,郭文明,等.基于D-S证据理论的配电终端状态诊断[J].电力系统保护与控制,2018,46(1):30-36.
GONG Fangliang,MU Longhua,GUO Wenming,et al.D-S evidence theory based condition diagnosis for distribution terminal units[J].Power System Protection and Control,2018,46(1):30-36
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基于D-S证据理论的配电终端状态诊断
龚方亮1,牟龙华2,郭文明1,朱吉然1,冷 华1,唐海国1,龚汉阳1,张志丹1
(1.国网湖南省电力公司，湖南 长沙 410007;2.同济大学电子与信息工程学院，上海 201804)
摘要:
为满足配电系统精益化运维对二次设备状态检修的要求，提出了一种多源信息融合的配电终端状态诊断方法。通过分析配电终端的运行监测信息，提炼出三种方便采集的状态特征量，从而建立了配电终端状态诊断的证据体系。提出了基于相关系数的基本概率分配函数构造方法，为避免故障终端样本数量不足导致的训练偏差，利用基于专家经验的加权平均模糊隶属度代替相关系数完成实际计算。利用D-S证据理论合成规则实现多元信息融合，并根据基本概率分配决策准则来判断配电终端的状态。最后，对配电终端的状态诊断进行了实例分析，相关结果验证了所提方案的有效性。
关键词:  配电终端  状态诊断  D-S证据理论  模糊隶属度  基本概率分配
DOI：10.7667/PSPC162094
分类号:
基金项目:国家自然科学基金项目(51407128);国家电网公司总部科技项目(5216A016000T);国网湖南省电力公司科技项目(5216A515008)
D-S evidence theory based condition diagnosis for distribution terminal units
GONG Fangliang1,MU Longhua2,GUO Wenming1,ZHU Jiran1,LENG Hua1,TANG Haiguo1,GONG Hanyang1,ZHANG Zhidan1
(1. State Grid Hunan Electric Power Company, Changsha 410007, China;2. College of Electronics and Information Engineering, Tongji University, Shanghai 201804, China)
Abstract:
To satisfy the requirements for secondary equipment condition-based maintenance from distribution network lean operation, this paper proposes a condition diagnosis method for Distribution Terminal Units (DTU) on the basis of multi-source information fusion concept. Three kinds of easily collected condition features are put forward by analyzing DTU monitoring information, thus the corresponding evidence framework is built. The Basic Probability Assignment (BPA) function constructor is presented, where the expertise-based weighted average fuzzy membership instead of correlation coefficients is utilized for calculation in order to avoid the training biases derived from the lower quantity of faulty DTUs. Multi-source information fusion is achieved by D-S evidence combining theory, and DTU condition is diagnosed according to the BPA decision rules. Finally, a case study of DTU condition diagnosis is carried out, where the results validate the effectiveness of this proposed method. This work is supported by National Natural Science Foundation of China (No. 51407128), Science and Technology Project of State Grid Corporation of China (No. 5216A016000T), and Science and Technology Project of State Grid Hunan Electric Power Company (No. 5216A515008).
Key words:  distribution terminal units  condition diagnosis  D-S evidence theory  fuzzy membership  basic probability assignment
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