مقاله انگلیسی رایگان در مورد برنامه مدیریت شرایط ترانسفورماتور قدرت برای تأسیسات صنعتی نفت و گاز – ۲۰۱۹ IEEE

I- Introduction

II- TRANSFORMER CONDITION ASSESSMENT PROGRAM

III- WEIGHTING AND SCORING METHODOLOGY

IV- CASE STUDY DISCUSSION

V- CONCLUSION

References

Abstract

This paper presents the lessons learned and challenges faced during the development and implementation of a transformer condition assessment program at a large oil and gas company. A methodology was developed to identify the condition of large power transformers that are due for replacement or have a risk of failure and require immediate action to rectify. This was achieved by a rational application of assessment criteria and ranking mechanisms. The transformer condition assessment program helps to minimize capital expenditures by using cost-effective alternatives that will extend the economic life of a power transformer. This paper focuses on evaluating aged power transformers (over 20 years old) through an advanced assessment program, which mainly consists of a two-level criteria scoring system. This will allow proactive action of flagging end of life, expediting mitigations, monitoring, and reporting the state of critical power transformers, which can be implemented on conservator type oil-immersed power transformers. A case study is also presented in this paper.

INTRODUCTION

Transformers reliability is crucial and their continuous operation is a desire for all power providers and consumers. Engineers at world-class companies are currently facing the challenge of assessing the condition of aged power transformers that were installed and on duty for more than 20 years. From experience in the oil and gas industry, power transformers are able to operate for more than 40 years especially when they are lightly loaded through double ended switchgear. The advantage of this configuration is to distribute the loads into two feeders that in order will increase power system availability and maintain operation continuity. Power transformers are like any other equipment, it degrades overtime. This is a normal behavior for all type of equipment and the process of this phenomenon for power transformer based on its mechanical strength and the integrity of its insulation system. Kraft paper, pressboard, and mineral oil are the main insulation media in oil-immersed power transformers. Periodic preventive maintenance and recently developed online monitoring systems are valuable methods to maintain and evaluate the condition of power transformers. Nevertheless, these methods do not take into consideration the analysis of all transformer’s parameters and do not present the actual condition of the entire transformer.