An improved model for optimizing power system fault diagnosis

作者：Weng Hanli^*; Mao Peng; Lin Xiangning

来源：Automation of Electric Power Systems, 2007, 31(7): 66-70.

• Fault diagnosis
• Malfunction protection
• Optimizing model

A model for optimizing fault diagnosis for power systems is formulated as a 0-1 integer programming problem. The fault equipment can be determined by means of refined mathematical manipulation. Currently used optimizing models and their disadvantages are thoroughly studied, especially the problems of irrationality and non-uniqueness of some diagnosis results. It has been found that the cause of the non-uniqueness lies in the fact that the model only takes the influence of each protection into account to the neglect of the joint influence between the main and back- up protections. On the basis of this finding and taking an overall view of the configuration characteristics of the currently used secondary systems and the features of the diagnosis information, an improved optimizing model of fault diagnosis for power systems is proposed. The particularity of the breaker malfunction protection is considered in the new model. The expected status functions of equipment are redefined. The preprocessing of the raw data on fault diagnosis and the realization of the system are also briefly discussed. Theoretical analysis and example verification indicate that the new model proposed is more rational and the diagnosis result more accurate.

• 出版日期2007
• 单位华中科技大学