In the power industry, the quality of transformer oil is directly related to the safe and stable operation of power equipment. Problems such as excessive water content and impurity contamination can seriously affect the insulation performance of transformers and even lead to equipment failures. The LYC-J series coalescing dewatering oil filters developed and produced by Xinxiang Lifeierte Filter Corp.,LTD, with advanced technology and excellent performance, provide a reliable solution for power enterprises to solve the problem of oil purification. The following takes the actual project of a provincial power grid company as an example to introduce the application of this oil filter in detail.
I. Project Background
A provincial power grid company manages hundreds of substations, with a total transformer capacity of over 50 million kVA. During routine inspections, it was found that the transformer oil of some equipment in operation for more than 3 years had serious performance degradation problems:
Excessive Water Content
Tests showed that about 30% of the transformer oil had a water content exceeding 50ppm (the national standard is below 35ppm). The presence of water reduces the insulation strength of the transformer oil and increases the risk of partial discharge.
Impurity Contamination
The oil contains solid impurities such as metal debris and fibers. These impurities can form conductive channels under the action of an electric field, threatening the safe operation of the transformer.
Decline in Oil Performance
Oxidation led to an increase in acid value. The acid value of some oil products reached 0.15mgKOH/g (the new oil standard is below 0.03mgKOH/g), accelerating equipment aging and shortening the service life of the transformer.
The traditional oil filters previously used had poor treatment effects. After treatment, the water content of the oil could only be reduced to about 45ppm, failing to meet the high - standard operation requirements of the power grid. To ensure the safe and stable operation of power equipment and reduce the risk of equipment failures, the power grid company decided to introduce advanced oil filtering equipment. After comprehensive technical evaluation and comparison, it finally selected the LYC-J series coalescing dewatering oil filters of our company.
II. Application and Implementation of Our Company's LYC-J Series Coalescing Dewatering Oil Filters
(I) Equipment Selection and Customization
Based on the transformer capacity, oil product status, and treatment requirements of the power grid company, our technical team customized three different models of LYC-J series coalescing dewatering oil filters for it. Among them, for 500 kV large - scale transformers, the LYC-J - 200 model oil filter with a processing flow rate of 200L/min was selected; for 220 kV and below transformers, the LYC-J - 100 model oil filter with a processing flow rate of 100L/min was equipped. The equipment features a core design that combines coalescence separation technology with high - precision filter materials to ensure efficient dewatering and impurity removal.
(II) System Installation and Debugging
Equipment Installation
The oil filters were installed in the substation maintenance workshop and equipped with dedicated inlet and outlet oil pipe interfaces, enabling quick connection to the transformer oil circulation system. The equipment is equipped with an intelligent control panel, integrating operation buttons, display instruments, and fault alarm devices for easy on - site operation and monitoring.
Application of Working Principles
Coalescence Dewatering: The LYC-J series oil filters utilize the special structure of the coalescing filter element to coalesce tiny water droplets in the oil into larger ones. When the water - containing transformer oil passes through the coalescing filter element, the water droplets are adsorbed and aggregated on the surface of the filter element, continuously increasing in volume.
Separation Dewatering: The coalesced large water droplets are separated from the transformer oil under the action of gravity and the separation filter element and settle into the water storage tank of the oil filter, achieving efficient dewatering.
Impurity Filtration: High - precision cellulose filter elements and stainless - steel mesh filter elements are used for multi - stage filtration of solid impurities in the oil, ensuring a filtration accuracy of 3 microns.
Debugging and Optimization
Our technical personnel conducted a one - week debugging of the oil filters, adjusting the equipment operation pressure (set at 0.3 - 0.5MPa) and flow parameters to ensure stable operation; conducting trial treatments on transformer oils with different water and impurity contents, and optimizing the filter element combination and operation time according to the treatment effects. At the same time, comprehensive operation training and maintenance guidance were provided for the operators of the power grid company, including equipment start - up and shutdown procedures, filter element replacement methods, and common fault troubleshooting.
III. Application Effects
Effect Category | Specific Performance |
Significant Improvement in Oil Quality | - The water content has been significantly reduced. After treatment, the water content of the transformer oil is all reduced to below 15ppm, far lower than the national standard, effectively enhancing the insulation performance - The removal rate of solid impurities reaches 99.8%, and the cleanliness of the oil reaches NAS 6 level standard, reducing the risk of conductive channel formation - After treatment by the oil filter, the acid value of the oil drops to below 0.05mgKOH/g, slowing down the aging rate of the oil |
Reduction in Equipment Operation Costs | - The transformer failure rate has decreased by 60%, reducing power outage losses caused by equipment failures by about 8 million yuan annually - The filter elements have a long service life. The coalescing filter elements and separation filter elements can be repeatedly cleaned and used, and the replacement cycle is extended to 1 - 2 years, reducing consumable costs by 40% compared with traditional oil filters |
Enhanced Operational Convenience | - High degree of automation. One - click start can complete the entire oil filtering process, reducing manual operation links and labor intensity - The intelligent monitoring system real - time displays operation parameters and fault information, facilitating timely handling of abnormal situations and improving work efficiency |
IV. Summary of Application Experience
Accurate Selection to Match Requirements
Transformers of different voltage levels have different requirements for oil treatment. Our company provides customized equipment selection solutions through detailed analysis of customer equipment parameters and oil product conditions, ensuring a high degree of matching between the performance of the oil filter and actual needs.
Core Technology Ensures Effects
The combination of coalescence separation technology and high - precision filter materials is the core advantage of the LYC-J series oil filters, which can quickly and efficiently remove water and impurities and improve oil quality.
Complete Service for Protection
Our company provides comprehensive after - sales services for customers, including equipment installation and debugging, personnel training, regular maintenance inspections, and 24 - hour technical support, ensuring the long - term stable operation of the equipment and winning high recognition from customers.
The successful application of our company's LYC-J series coalescing dewatering oil filters in this provincial power grid company fully demonstrates the reliability and advancement of the products. In the future,Xinxiang Lifeierte Filter Corp.,LTD will continue to focus on the research and development of oil purification technology, providing higher - quality and more efficient oil filtering equipment and solutions for the power industry and more fields.
