Fan Wenbo

Study on information fusion method of distribution equipment condition comprehensive evaluation

This paper proposes an information fusion method which is suitable for distribution equipment condition comprehensive evaluation. In view of the characteristics such as distribution equipment condition has complex information source, multiple types of information and different data format, different sources of data features are excavated. Combining with the particularity of distribution equipment condition evaluation and the applicability of different hierarchical information fusion method, an information fusion model for distribution equipment condition comprehensive evaluation is built, meanwhile the corresponding information fusion method is obtained.

Condition evaluation index system of distribution equipments

In this paper, the condition-based maintenance index system for distribution equipments made by State Grid is supplemented by adding the maintenance strategy evaluation indexes, which will be helpful for the maintenance staff to optimize the choice of maintenance strategies. A risk factor is introduced in the security and economy indexes for maintenance strategy evaluation by building function between the equipment failure rate and equipment health state. So the evaluation result of different maintenance strategy, especially for preventive maintenance and Breakdown Maintenance, will be great different, and thus the decision makers with different risk preference are assisted to make their choices. Besides, A service restoration optimization program is implemented during the evaluation, so the outage load caused by maintenance will be divided into two sets: one is the load can be restored with the outage time equals to the switch operation time; another is the load cannot be restored with the outage time equals to the maintenance time. This improvement will make the corresponding evaluation indexes more accurate and hence can distinguish the slight difference of different maintenance strategy. Mathematical analysis shows that the established indexes can be calculated and can provide richer information to assist decision makers, therefore the established index system is practical and effective.

Design and research of integrated interface adapter for power enterprises heterogeneous system

For the interoperability of heterogeneous system integration of electric power enterprise existing conversion problems, put forward a kind of power system interoperability based integrated interface adapter design method based on The adapter design basis and principles of public information model, component interface specification, the message based on the proposed model, using four layers architecture integration adapter contains model information storage module, model conversion unit, mapping unit, application system interface module and a common component interface model, two-way conversion model and two sets of work flow and based on the interface, universalize the interface of power system which has the different structures, and then accessed in Utility Integrate Bus(UIB) to realize the integration and sharing of heterogeneous data.

Condition evaluation of distribution equipment based on conjoint analysis

Conjoint analysis is a new evaluation method. It has many advantages, but it has been seldom applied in the field of power equipment condition evaluation. This paper applies conjoint analysis method in the condition evaluation of distribution equipment, and proposes corresponding solutions to the specific problems appeared in implementation process: by refining the rule of consistency check in conjoint analysis, an optimization model with the goal of minimizing the adjustment to the original scores without violating the logical consistency constraint has been built; in view of the problem that too few levels to do accurate evaluation, the concept of membership degree is introduced in the transition process of index scores to levels to improve the evaluation sensitivity to the minor changes of index, making the results more accurate; under the presume of making sure that survey cards have reasonable redundancy, the linear correlation cards are removed in orthogonal experiment to reduce the cards number to improve the efficiency of investigation. The example analysis results show that those proposed solutions are correct and effective.