Amorphous alloy transformer refers to a transformer made of amorphous alloy iron core and assembled into a transformer, also known as amorphous alloy iron core transformer. Amorphous alloys are manufactured using a technique called super-quench solidification, in which the metal atoms solidify from a liquid to a solid without having time to arrange into a conventional crystal structure. The disordered arrangement of the atomic structure is called amorphous state, and the material produced is called amorphous alloy.
Characteristics of amorphous alloys
Amorphous alloy has very excellent permeability performance, easy to complete its demagnetization and magnetized process, the silicon steel material core loss is low, can achieve high efficiency and energy saving effect, it has low coercive force, low exciting current, good temperature stability etc, made of amorphous alloy iron core transformer, the no-load loss compared with silicon steel sheet of the integrated products dropped 70-80%, down 20% compared with the integrated series of idle current. Therefore, as an excellent magnetic conductive material, it is introduced into transformers and other products that need magnetic circuit.
Usually referred to as amorphous alloy due to the limitation of material production process, generally for strip. Amorphous alloy transformers are more suitable for distribution networks because capacity limits are generally not greater than 40,000 KVA.
The use of amorphous alloy as the core transformer has the remarkable characteristics of energy saving and environmental protection. First of all, in terms of environmental protection, by technical detection, amorphous alloy oil immersed transformer can effectively reduce carbon monoxide, sulfur monoxide, nitric oxide and other harmful gases, can effectively reduce the pollution of the atmosphere. Secondly, the most significant characteristic of amorphous alloy transformer is that the no-load loss is very low and the energy saving effect is obvious. Due to the superior magnetic conductivity of amorphous alloy materials, it is easier to be magnetized or demagnetized with very little energy consumption, so the no-load loss of amorphous alloy transformers is far lower than that of traditional transformers. The energy saving efficiency of amorphous alloy transformers is more obvious in the fields with large fluctuation of power load, such as highways, urban infrastructure and residential areas. Due to the remarkable effect of energy saving, it can save a lot of power plant investment, reduce the consumption of power generation fuel, and thus reduce the pollution to the atmospheric environment.
Because the process of amorphous alloy transformer is complex, the price of its product is about 30% higher than the traditional transformer of the same type. However, because of its remarkable energy saving effect and low operating cost, its comprehensive use cost is still lower than the traditional transformer. Compared with the commonly used S9 type transformer, the amorphous alloy transformer of 500 kVA can save 6832.8 kWh of electric energy per year, and save 5207 yuan of electric energy per year (the average commercial electricity price in Beijing is 0.762 yuan/kWh). Although the price of amorphous alloy transformer is about 30% higher than that of S9 type transformer, the increased cost can be fully recovered within 3~5 years of operation of the transformer.
Application status of amorphous alloy transformers
Because the urban distribution network emphasizes the operation mode of interconnection and interband in the development planning, a large number of transformers appear in the actual operation of no-load and low-load, transformer no-load loss is huge. Using amorphous alloy transformer to reduce no-load loss of equipment is of great significance to reduce line loss and increase economic benefit.
At the same time, the amorphous alloy transformer adopts the fully sealed structure, which can delay the aging of transformer oil and insulating paper. It is not only compact in structure, but also maintenance-free and high in operation efficiency. The amorphous alloy transformer has the advantages of low loss, less heat, low temperature rise and very stable operation performance. In addition, the low-voltage winding of amorphous alloy transformer is foil-wound, which has the advantages of low loss, strong short-circuit resistance and reasonable structure. Dyn11 is used in the connection group of the transformer to reduce the influence of harmonics on the power grid, improve the quality of power supply and enhance the reliability of power supply.
Broad prospects
With the gradual understanding of the advantages of amorphous alloy materials and large-scale production, amorphous alloy materials will gradually replace the traditional silicon steel sheet iron core transformer, and become a new generation of energy saving and consumption reduction products. This will play an immeasurable role in improving the power quality of the power grid, reducing its own loss, maximizing the use of energy conversion, and increasing the vitality of power enterprises, especially in the large-scale application of distribution network.
Due to the increasing contradiction between power grid construction and energy supply and demand, Beijing Electric Power Company is trying to solve the structural contradiction of power and change the past tendency of "attaching importance to the main network and light distribution network". The direction of power grid construction in Beijing is: "the main network is strong and the distribution network is reliable." In order to build a reliable distribution network, it is necessary to eliminate those facilities with low efficiency, high consumption, backward performance and poor safety, and strive to develop energy saving electric power equipment. The amorphous alloy transformer has the obvious advantages of high efficiency and energy saving, which is a good choice for the status quo of Beijing urban power distribution network.
The production of amorphous alloy transformers has greatly improved the traditional pattern of distribution transformer manufacturing. In particular, its remarkable energy saving effect effectively reduces the line loss of the power grid, thus reducing the operation cost of the power supply department. Although the initial cost of the amorphous alloy transformer is higher, its excellent low loss performance will make the power supply enterprises change the traditional concept, through the selection of energy-saving power equipment, reduce operating costs, and achieve the purpose of energy saving and efficiency. Therefore, the popularization and application of amorphous alloy transformer will be a way to save energy and increase efficiency, and it will have a broad application prospect in the distribution network.
Service