西南石油大学学报(自然科学版)

Previous Articles     Next Articles

Hierarchical Fault Diagnosis of Rod Pumping System Based on
Fault Distinguishing

Liang Hua*   

  1. College of Energy and Electrical Engineering,Hohai University,Nanjing,Jiangsu 210098,China
  • Online:2015-02-01 Published:2015-02-01

Abstract:

There is higher fault probability for rod pumping system under the bad work conditions. Because of the large amount
of sample and the long-time steady status,this paper proposes hierarchical fault diagnosis method. Fault distinguishing and
fault identification are two stages in this method. In the second stage of the fault hierarchical diagnosis of rod pumping system
based on surface dynamometer card,starting from fault mechanism,we propose search tree method in fault identification of
rod pumping system on the basis of fault distinguish. In fault identification,combining statistical rule of normal samples and
search tree based on fault principle and fault distinguish,search tree of rod pumping system is established to identify fault style
including serious fault. Efficiency of this method is verified by identifying single fault and combined fault of rod pumping
system accurately through typical fault dynamometer cards.

Key words: rod pumping system, fault hierarchical diagnosis, fault identification, surface dynamometer card, search tree