CN213339735U - Electromagnetic shielding tubular bus of transformer substation - Google Patents

Abstract

The utility model discloses a tubular generating line of transformer substation electromagnetic shield type, including copper base or aluminium base tubular generating line body, there is the iron-based amorphous alloy layer that is used for electromagnetic shield through the electrodeposition technology deposit on the generating line body outer peripheral face. The utility model has the advantages that the iron-based amorphous alloy layer has been deposited at present generating line body outer peripheral face, can reduce transformer substation main transformer middling pressure side tubular generating line electromagnetic radiation intensity 50% ~ 70%, not only can reduce the influence to the outside resident of transformer substation and social personnel electromagnetic radiation, reduces the influence to the inside operation personnel electromagnetic radiation of transformer substation simultaneously, creates good living environment and operational environment.

Description

Electromagnetic shielding tubular bus of transformer substation

Technical Field

The utility model relates to a tubular bus of transformer lead-out wire in electric power system transformer substation especially relates to the tubular bus of transformer substation's electromagnetic shield type.

Background

Electromagnetic radiation refers to the propagation of a portion of the electromagnetic energy emitted by a field source away from the field source and out-diffusing the energy in the form of electromagnetic waves. Electromagnetic waves are waves in which electric and magnetic fields move and transfer energy, including radio waves, microwaves, infrared rays, visible light, ultraviolet rays, x-rays, gamma rays, and the like. In urban (town) areas, substations are built, and electric fields, magnetic fields and electromagnetic radiation exist inside and around the substations; the main reason for generating electric field, magnetic field and electromagnetic radiation is that the live equipment and live conductor of the substation have power frequency voltage and power frequency current. In order to prevent the electric field, the magnetic field and the electromagnetic radiation generated by the charged equipment from affecting the human body, the electric field, the magnetic field and the electromagnetic radiation energy need to be controlled within a certain range. The concern of electric and magnetic fields affecting human health was first originated in the united states of the last century, western europe, etc., where electric power facilities were first used on a large scale. In the research work on electromagnetic fields and human health by the international committee for non-ionizing radiation protection, according to the relevant research results, the international committee for non-ionizing radiation protection issued a guideline in 1998 to specify that the safety value of the power frequency electric field intensity to the public is 4kV/m and the limit value of the power frequency magnetic induction intensity to the public is 100 microtesla. This standard was officially recommended by the world health organization in 2007 and adopted by most countries. The power frequency electromagnetic radiation protection safety value regulation of part of the countries (organizations) in the world is shown in figure 3.

The 'electromagnetic radiation environmental protection management method' in China is attached to a power frequency strong radiation system specified by 'electromagnetic radiation construction project and equipment directory', wherein two items are related to power transmission and transformation engineering, and the three items comprise: a power transmission and transformation system with the voltage of more than 100 kV; and the current is over 100A.

The experts such as the teaching just at the high points of the main committee of the Chinese electromagnetic compatibility committee, the teaching of Zhaoyefeng of the Chinese electro-technical society, the teaching of pottery and Yongyu of the original institute of labor protection in Beijing city, and the like indicate that: there is a lot of scientific evidence at home and abroad that the electromagnetic radiation environment with the magnetic field higher than 0.2 microtesla is likely to cause harm to human body. Professor soviet Thomsom the Chinese disease prevention center environment suggests that the harm of electromagnetic radiation to human health is accumulated, and the harm cannot be said to be caused even if the electromagnetic radiation does not exceed the standard.

The high-voltage bus of the transformer substation is an important node for collecting and distributing electric energy, the current density of the whole bus is high, and a power frequency electric field and a power frequency magnetic field are generated. Especially, the contact area between the tubular bus and the outside air is large, and the generated power frequency electric field and the power frequency magnetic field are stronger under the condition of the same current density. Especially, when a power system where a transformer substation is located breaks down, performs switching operation, overhauls equipment and tests, the tubular bus can be instantly conducted or interrupted by large current, the electromagnetic radiation intensity at the moment is high, and the influence on external electromagnetic interference is also large. Therefore, the research on how to reduce the generation of power frequency electric field and power frequency magnetic field and prevent the transmission to the outside by taking the transformer substation and the high-voltage transmission line as key objects and create a safe electromagnetic environment for social public space and transformer substation operators is still an important subject of the research in the field.

Disclosure of Invention

An object of the utility model is to provide a tubular generating line of electromagnetic shield type of transformer substation can not only play shielding three-phase tubular generating line power frequency electric field and power frequency magnetic field, prevent the effect of electromagnetic wave to the outer space radiation, can also eliminate the vortex that three-phase tubular generating line produced to the generating line gold utensil and metal component on every side simultaneously, reduces the electric energy loss.

In order to achieve the above purpose, the utility model can adopt the following technical proposal:

tubular generating line of transformer substation electromagnetic shield type, including tubular generating line body outer peripheral face has the iron-based amorphous alloy layer that is used for electromagnetic shield through the electrodeposition technology deposit.

The utility model discloses an advantage embodies in following aspect:

1. after the technical result of the invention is adopted, the electromagnetic radiation intensity of the tubular bus at the medium-voltage side of the main transformer of the transformer substation can be reduced by 50-70% on the basis of the prior art, the influence on the electromagnetic radiation of residents and social personnel outside the transformer substation can be reduced, meanwhile, the influence on the electromagnetic radiation of operating personnel inside the transformer substation can be reduced, and a good living environment and a good working environment are created.

2. When the transformer substation normally operates, electromagnetic interference caused by electromagnetic radiation of a medium-voltage side tubular bus of a main transformer of the transformer substation can be effectively prevented, and electromagnetic environments in the inner space and the outer space of the transformer substation are purified. Generally, the voltage and current of equipment in a transformer substation in an electric power system are both power frequency (50 Hz), and no matter how perfect the harmonic treatment in the electric power system is, higher harmonics always exist, and the electromagnetic radiation of the higher harmonics corresponding to different frequencies is radiated to the space to form interference signals to influence the transmission of normal public wireless signals.

3. When a power system where a transformer substation is located breaks down, performs switching operation and transformer overhaul tests, and relates to live operation or quit operation of a main transformer, a high-current tubular bus at the medium-voltage side of the main transformer is instantly conducted or interrupted, the electromagnetic radiation intensity at the moment is high, and the influence on external electromagnetic interference is also large. After the technical result of the invention is adopted, the influence of electromagnetic radiation and electromagnetic interference can be effectively reduced.

4. The transformer substation has a positive effect on social stability, people know more and more natural scientific knowledge along with social progress, the fact that the transformer substation does not contend for external electromagnetic radiation is true, and a part of non-professional people in the society exaggerate the influence degree of the transformer substation on the external electromagnetic radiation on one side, so that the society is unstable. Therefore, electromagnetic radiation of the medium-voltage side tubular bus of the main transformer of the transformer substation is reduced, improvement of scientific and technological progress on the living environment of people is reflected, and social harmonious development is promoted.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged sectional view taken along line a-a of fig. 1.

Fig. 3 is a regulation diagram of the power frequency electromagnetic radiation protection safety value of part of the country (organization).

Detailed Description

The following describes embodiments of the present invention in detail with reference to the drawings, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are provided, but the scope of the present invention is not limited to the following embodiments.

As shown in fig. 1 and 2, the electromagnetic shielding tubular bus of transformer substation comprises a tubular bus body 1 made of copper material or aluminum material, and an iron-based amorphous alloy layer 2 for electromagnetic shielding is deposited on the outer peripheral surface of the bus body 1 by an electrolytic deposition process. In order to achieve a better shielding effect, the iron-based amorphous alloy layer 2 can be composed of the following components: 68.77%, Co: 18.23%, Si: 0.99%, B: 12.01 percent. Specifically, the deposition thickness of the iron-based amorphous alloy layer is determined according to the following table 1:

TABLE 1 thickness of Fe-based amorphous alloy layer under standard environmental conditions of tubular bus

The standard environmental conditions are as follows: the allowable working temperature of the tubular bus is +70 ℃, the rated current of the bus is the rated alternating current carrying capacity, the temperature of the outside air is +25 ℃, the relative humidity of the air is 50%, and the altitude is less than or equal to 1000 m.

The iron-based amorphous alloy can be deposited on the surface of the tubular bus 1 contacting with the outside to form an amorphous coating (the iron-based amorphous alloy layer 2) by adopting an electrolytic deposition method. The atoms of the amorphous coating are in a randomly arranged amorphous structure, a B-H loop is narrow (B is magnetic induction intensity, H is magnetic field intensity), the magnetic permeability is high, the coercive force (coercive magnetic field) is low, the decay capability of an electromagnetic field is strong, and the magnetic shielding performance is better particularly in a power frequency section. Meanwhile, the irregular arrangement of the amorphous alloy atoms limits the free passage of electrons, so that the resistivity is high, the iron-based amorphous alloy layer hardly generates eddy current, and the electric energy loss is extremely low.

Claims (2)

1. The utility model provides a tubular bus of transformer substation electromagnetic shield type, includes tubular bus body, its characterized in that: and an iron-based amorphous alloy layer for electromagnetic shielding is deposited on the outer peripheral surface of the tubular bus body through an electrolytic deposition process.

2. The substation electromagnetic shielding type tubular bus bar of claim 1, wherein: the tubular bus body is a copper-based bus or an aluminum-based bus.

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