阅读说明：本技术 一种500kV变电站的降噪结构 (Noise reduction structure of 500kV transformer substation ) 是由 王卓林 龚淼 卢晨 朱春叶 于 2020-06-27 设计创作，主要内容包括：本发明涉及一种500kV变电站的降噪结构,用于500kV变电站中主变的降噪,所述的主变包括相互连接的变电组件和油箱,该降噪结构包括第一降噪模块和第二降噪模块,所述的第一降噪模块包括变电降噪组件和油箱降噪组件,所述的变电降噪组件包括依次竖直设置于地面的第一隔声板、第二隔声板和第三隔声板以及两端分别与第二隔声板和第三隔声板的顶部连接的第四隔声板,所述的变电组件设置于第二隔声板和第三隔声板之间,所述的油箱设置于第一隔声板和第二隔声板之间,所述的第二降噪模块设置于第一降噪模块的外围,包括多个降噪单元,所述的多个降噪单元依次连接成折线,与现有技术相比,本发明具有有效减少500kV变电站噪声且成本低等优点。(The invention relates to a noise reduction structure of a 500kV transformer substation, which is used for reducing noise of a main transformer in the 500kV transformer substation, wherein the main transformer comprises a transformer assembly and an oil tank which are connected with each other, the noise reduction structure comprises a first noise reduction module and a second noise reduction module, the first noise reduction module comprises a transformer noise reduction assembly and an oil tank noise reduction assembly, the transformer noise reduction assembly comprises a first sound insulation plate, a second sound insulation plate and a third sound insulation plate which are vertically arranged on the ground in sequence, and a fourth sound insulation plate of which two ends are respectively connected with the tops of the second sound insulation plate and the third sound insulation plate, the transformer assembly is arranged between the second sound insulation plate and the third sound insulation plate, the oil tank is arranged between the first sound insulation plate and the second sound insulation plate, the second noise reduction module is arranged on the periphery of the first noise reduction module and comprises a plurality of noise reduction units, and the plurality of noise reduction units are sequentially connected into a broken line, compared with the prior art, the invention has the advantages of effectively reducing the noise of the 500kV transformer substation, along with low cost and the like.)

1. A noise reduction structure of a 500kV transformer substation is used for reducing noise of a main transformer in the 500kV transformer substation, wherein the main transformer comprises a transformer assembly and an oil tank which are connected with each other, and the noise reduction structure is characterized by comprising a first noise reduction module and a second noise reduction module (6), wherein the first noise reduction module comprises a transformer noise reduction assembly and an oil tank noise reduction assembly, the transformer noise reduction assembly comprises a first sound insulation plate (3), a second sound insulation plate (3) and a third sound insulation plate (4) which are vertically arranged on the ground in sequence, and a fourth sound insulation plate (9) of which two ends are respectively connected with the tops of the second sound insulation plate (3) and the third sound insulation plate (4), the transformer assembly (1) is arranged between the second sound insulation plate (3) and the third sound insulation plate (4), and the oil tank (7) is arranged between the first sound insulation plate (3) and the second sound insulation plate (3);

the second noise reduction module (6) is composed of a plurality of noise reduction units which are connected in sequence and is arranged on the periphery of the first noise reduction module.

2. The noise reduction structure of a 500kV transformer substation of claim 1, characterized in that, the first noise reduction module still include prevent hot wall (5) and acoustic absorber (13), the both sides of preventing hot wall (5) respectively with first sound insulation board (3) and third sound insulation board (4) be connected, the middle part is connected with second sound insulation board (3), prevent hot wall (5), first sound insulation board (3), second sound insulation board (3) and third sound insulation board (4) mutually support and form the enclosure, surround power transformation subassembly (1) and oil tank (7), acoustic absorber (13) set up in preventing hot wall (5) inboard.

3. The noise reduction structure of the 500kV transformer substation as claimed in claim 2, wherein the sound absorber (13) comprises a plurality of rectangular sound absorbers, and the plurality of rectangular sound absorbers are uniformly arranged on the firewall (5) between the second sound insulation plate (3) and the third sound insulation plate (4) respectively to form a sound absorber array.

4. A noise reduction structure of a 500kV substation according to claim 3, characterized in that the sound absorber (13) is an aluminum honeycomb sound absorbing panel.

5. A noise reduction structure of 500kV substation according to claim 1, characterized in that the first noise reduction module further comprises an exhaust silencer (8) disposed at the exhaust port, and the exhaust silencer (8) is disposed on the upper portion of the fourth sound insulation board (9) for reducing noise of the exhaust of the fan (14).

6. The noise reduction structure of the 500kV transformer substation of claim 5, wherein the exhaust silencer (8) comprises a shell (82), angle iron (81), louver air outlets (83) and a guide plate (84), the shell (82) is a cuboid shell, the angle iron (81) is U-shaped and is arranged at two corners of the bottom of the shell (82) for fixedly mounting the exhaust silencer (8), the louver air outlets (83) are respectively arranged at two side faces of the shell (82), and the guide plate (84) is arranged inside the shell (82).

7. A noise reduction structure of a 500kV substation according to claim 1, wherein the height of the second sound insulation plate (3) is less than that of the third sound insulation plate (3), the fourth sound insulation plate (9) is obliquely arranged on the second sound insulation plate (3) and the third sound insulation plate (3), and the height of the first sound insulation plate (2) is greater than that of the oil tank (7).

8. The noise reduction structure of the 500kV transformer substation according to claim 1, wherein the second sound insulation plate (3) is provided with an oil pipe hole (12) for penetrating an oil pipe for connecting the oil tank (7) and the transformer assembly (1), an access door (11) is arranged on each of two sides of the second sound insulation plate, and an access door (11) and an air inlet silencer (10) are arranged on each of two sides of the third sound insulation plate (4).

9. The noise reduction structure of a 500kV transformer substation according to claim 1, wherein the noise reduction unit comprises a main support column (62) fixedly installed in a foundation (64), an auxiliary support column (61) arranged on the upper surface of the foundation (64), and a plurality of barrier plates (63) transversely arranged between the main support column (62) and the auxiliary support column (61), the plurality of barrier plates (63) are sequentially arranged from top to bottom, and the distance between two adjacent upper and lower barrier plates (63) is 8-9 cm.

10. A noise reduction structure of a 500kV substation according to claim 9, characterized in that the noise reduction unit has a height of 3m, 5m or 10 m.

Technical Field

The invention relates to the field of transformer substation noise reduction, in particular to a noise reduction structure of a 500kV transformer substation.

Background

In recent years, rapid development of power grid construction and increasing expansion of urban scale have led to the emergence of noise-sensitive buildings such as residential buildings around newly-built 500kV substations. Compared with the 110kV and 220kV transformer substations, the 500kV transformer substation has more types of noise sources, higher noise source intensity, more complex noise influence and more obvious influence on the environment outside the substation.

The noise generated during the operation of the transformer substation mainly comes from electromagnetic noise of electrical equipment such as a main transformer, a high-voltage reactor, a circuit breaker, outdoor power distribution equipment and the like and aerodynamic noise generated by a cooling fan, and according to the requirements of relevant environmental noise standards, the noise generated by a 500kv transformer substation project needs to be controlled within 55dB (A) in daytime and 45dB (A) at night.

Due to a series of reasons of uneven manufacturing process, ageing of equipment, long-term operation, close distance with a sensitive point and the like, the problem of noise pollution of the transformer substation is increasingly prominent. In recent years, dispute and complaint cases related to the substation noise problem are increasing, and the substation noise problem becomes an urgent problem to be faced in the power grid construction process.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a noise reduction structure of a 500kV transformer substation, so that the noise pollution of the transformer substation is effectively reduced, and the cost is low.

The purpose of the invention can be realized by the following technical scheme:

a noise reduction structure of a 500kV transformer substation is used for reducing noise of a main transformer in the 500kV transformer substation, wherein the main transformer comprises a transformer assembly and an oil tank which are connected with each other, the noise reduction structure comprises a first noise reduction module and a second noise reduction module, the first noise reduction module comprises a transformer noise reduction assembly and an oil tank noise reduction assembly, the transformer noise reduction assembly comprises a first sound insulation plate, a second sound insulation plate and a third sound insulation plate which are vertically arranged on the ground in sequence, and a fourth sound insulation plate, two ends of the fourth sound insulation plate are respectively connected with the tops of the second sound insulation plate and the third sound insulation plate, the transformer assembly is arranged between the second sound insulation plate and the third sound insulation plate, and the oil tank is arranged between the first sound insulation plate and the second sound insulation plate;

the second noise reduction module is composed of a plurality of noise reduction units which are connected in sequence and is arranged on the periphery of the first noise reduction module. The second noise reduction module is mainly arranged at two corners close to the power transformation assembly, surrounds two sides of the power transformation assembly and further cuts off noise of the power transformation assembly after the power transformation assembly passes through the first noise reduction module.

Further, first noise reduction module still including preventing hot wall and sound absorber, the both sides of preventing hot wall be connected with first sound insulation board and third sound insulation board respectively, the middle part is connected with the second sound insulation board, prevent hot wall, first sound insulation board, second sound insulation board and third sound insulation board mutually support and form the enclosure, surround transformer subassembly and oil tank, the sound absorber set up in preventing hot wall inboard. The transformer assembly is one of the largest noise sources of a main transformer of the transformer substation, the second sound insulation plate, the third sound insulation plate, the firewall and the fourth sound insulation plate surround the transformer assembly to form a first layer noise reduction layer, and meanwhile, the first sound insulation plate can further isolate the noise generated after the transformer assembly passes through the first layer noise reduction layer while isolating the noise of the oil tank.

Further preferably, the sound absorber comprises a plurality of rectangular sound absorbers, and the plurality of rectangular sound absorbers are respectively and uniformly arranged on the fireproof wall between the second sound insulation plate and the third sound insulation plate to form a sound absorber array.

Further preferably, the sound absorber is an aluminum honeycomb sound absorption plate. The first sound insulation plate, the second sound insulation plate, the third sound insulation plate, the fourth sound insulation plate and the aluminum honeycomb sound absorption plate are all set to be 100mm in thickness.

Furthermore, the first noise reduction module further comprises an exhaust silencer arranged at the air outlet, and the exhaust silencer is arranged at the upper part of the fourth sound insulation plate and used for reducing noise of the exhaust of the fan and further reducing noise influence.

Further preferably, the exhaust silencer comprises a shell, angle iron, louver air outlets and a guide plate, the shell is a cuboid shell, the angle iron is U-shaped and is arranged at two corners of the bottom of the shell and used for fixedly mounting the exhaust silencer, the louver air outlets are respectively arranged at two side faces of the shell, and the guide plate is arranged inside the shell.

Preferably, the height of second sound insulation board be less than the height of third sound insulation board, fourth sound insulation board slope set up on second sound insulation board and third sound insulation board, the height of first sound insulation board be greater than the height of oil tank, the size cooperation of each sound insulation board structure and the size of each main transformer improves the reliability.

Furthermore, the second sound insulation board is provided with an oil pipe hole for penetrating through an oil pipe for connecting the oil tank and the power transformation assembly, the two sides of the second sound insulation board are respectively provided with an access door, and the two sides of the third sound insulation board are respectively provided with an access door and an air inlet silencer.

Further, the unit of making an uproar of falling include the main tributary dagger of fixed mounting in the ground, set up in the supplementary support column of ground upper surface and transversely set up the barrier board between main tributary dagger and supplementary support column, the barrier board set up a plurality ofly, arrange from top to bottom in proper order, the distance between two upper and lower adjacent barrier boards is 8-9cm, the main tributary dagger plays the effect of main support, but in need squeezing into the ground, the processing difficulty, and supplementary support column can play certain supporting role, and processing is simple.

Further preferably, the height of the noise reduction unit is 3m, 5m or 10 m.

The second noise reduction modules are arranged at two corners close to the power transformation assembly respectively, the plurality of noise reduction units are matched with each other to form a Z-shaped folding line, so that the second noise reduction modules are formed, the starting point of one end of each second noise reduction module is parallel to the second sound insulation plate, and the other end of each second noise reduction module extends towards the outer side of the third sound insulation plate.

Compared with the prior art, the invention has the following advantages:

1) according to the invention, two layers of noise reduction modules which interact with each other are adopted, and noise reduction is mainly performed on the power transformation assembly of the main transformer in the 500kV transformer substation, so that the most main noise in the transformer substation can be treated, and the noise reduction performance of the transformer substation is effectively improved;

2) the noise reduction device is provided with the air exhaust silencer and the air inlet silencer, and noise reduction processing is performed on the air inlet and the air outlet of the power transformation assembly, so that the noise reduction performance of the transformer substation is further improved;

3) the materials such as the sound insulation board, the sound absorber, the barrier board and the like adopted in the invention can be easily obtained, the noise reduction effect is improved only by designing the placing position and the mutual relation, and the implementation is simple and the cost is low.

Drawings

FIG. 1 is a schematic structural diagram of a noise reduction device of a main transformer in a 500kV transformer substation;

FIG. 2 is a top view of a first noise reduction module;

FIG. 3 is a schematic structural diagram of a first noise reduction module, wherein FIG. 3a is a top view, FIG. 3B is a cross-sectional view taken along line A-A of FIG. 3a, and FIG. 3c is a cross-sectional view taken along line B-B of FIG. 3 a;

FIG. 4 is a side cross-sectional view of a first noise reduction module;

FIG. 5 is a perspective view of the exhaust silencer;

FIG. 6 is a cross-sectional view of the exhaust silencer;

FIG. 7 is a top view of the exhaust silencer;

FIG. 8 is a schematic view of a firewall construction;

FIG. 9 is a schematic structural diagram of a denoising unit in a second denoising module;

FIG. 10 is a schematic diagram of the ambient noise of a conventional substation;

fig. 11 is a schematic diagram of the ambient noise of the transformer substation after the structure of the invention is adopted.

The air conditioner comprises a transformer 1, a transformer 2, a first sound insulation plate 3, a second sound insulation plate 4, a third sound insulation plate 5, a firewall 6, a second noise reduction module 61, an auxiliary support column 62, a main support column 63, a screen plate 64, a foundation 7, an oil tank 8, an exhaust silencer 81, angle iron 82, a shell 83, a louver air outlet 84, a guide plate 9, a fourth sound insulation plate 10, an air inlet silencer 11, an access door 12, an oil pipe hole 13, a sound absorber 14 and a fan.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.