66kV-level prefabricated substation

Abstract

The utility model discloses a 66kV preassembled transformer substation, which comprises a 66kV high-voltage chamber, a low-voltage chamber and a 66kV transformer, and is characterized in that an inflatable high-voltage circuit breaker and a high-voltage bushing connected with the inflatable high-voltage circuit breaker are arranged in the 66kV high-voltage chamber; the 66kV transformer is fixedly arranged between the 66kV high-voltage chamber and the 66kV low-voltage chamber, the 66kV transformer is an oil-immersed transformer, a transformer high-voltage bushing is fixedly connected to an oil tank of the 66kV transformer, one end of the transformer high-voltage bushing is inserted into the 66kV high-voltage chamber, a current transformer is fixed in the oil tank, the width and the size of the 66kV preassembled substation are reduced, and long-distance transportation is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated substations, and particularly relates to a 66kV-class prefabricated substation. Background Art

[0002] A prefabricated substation, also known as a box-type substation, integrates high-voltage switchgear, transformers, and low-voltage switchgear in a factory. Compared with directly constructing a substation on-site, a prefabricated substation has the advantages of small volume, low cost, and short on-site construction period.

[0003] However, due to limited transportation dimensions, the high-voltage levels of current prefabricated substations at home and abroad only reach 35kV-class and below. Summary of the Utility Model

[0004] The utility model provides a 66kV-class prefabricated substation, aiming to solve the problem that the high-voltage level of the above-mentioned prefabricated substation cannot reach 66kV-class.

[0005] The purpose of the utility model is achieved by adopting the following technical solutions:

[0006] A 66kV-class prefabricated substation includes:

[0007] A 66kV high-voltage chamber, in which an inflatable high-voltage circuit breaker or a high-voltage load switch and a high-voltage bushing connected to the inflatable high-voltage circuit breaker or the high-voltage load switch are provided;

[0008] A low-voltage chamber;

[0009] A 66kV transformer, which is fixedly arranged between the 66kV high-voltage chamber and the low-voltage chamber. The 66kV transformer is an oil-immersed transformer, and a transformer high-voltage bushing is fixedly connected to its oil tank. One end of the transformer high-voltage bushing is inserted into the oil tank, and a current transformer is fixed in the oil tank. The current transformer is electrically connected to the transformer high-voltage bushing.

[0010] Further, a high-voltage switchgear and a high-voltage chamber are fixedly arranged in the 66kV high-voltage chamber. The inflatable high-voltage circuit breaker or the high-voltage load switch is arranged in the high-voltage switchgear, and both the high-voltage bushing and the transformer high-voltage bushing are arranged in the high-voltage chamber.

[0011] Further, a first cabinet door is equipped on the high-voltage switchgear, and a second cabinet door is equipped on the high-voltage chamber. The first cabinet door and the second cabinet door are arranged on the same side of the 66kV high-voltage chamber

[0012] Further, an outgoing line wall-through bushing is fixed on the top of the 66kV high-voltage chamber.

[0013] Further, a low-voltage conductive rod is fixedly connected to the 66 kV transformer, and the low-voltage conductive rod is arranged at the connection position between the 66 kV transformer and the low-voltage chamber.

[0014] Further, a low-voltage switchgear is fixed in the low-voltage chamber, and low-voltage power distribution equipment is arranged in the low-voltage switchgear.

[0015] Further, the bottoms of the 66 kV high-voltage chamber, the 66 kV transformer, and the low-voltage chamber are all fixed on the same base.

[0016] Further, a high-voltage winding is fixed in the oil tank, a high-voltage lead is connected between the high-voltage winding and the transformer high-voltage bushing, and the high-voltage lead passes through the current transformer.

[0017] The beneficial effects of the present utility model are as follows:

[0018] The present utility model adopts the method of directly inserting the current transformer into the oil tank to reduce the volume of the prefabricated substation, and adopts the method of arranging the 66 kV high-voltage chamber and the low-voltage chamber on both sides of the 66 kV transformer respectively to reduce the width of the prefabricated substation. By reducing the volume and width of the prefabricated substation, the transportation difficulty of the 66 kV prefabricated substation is reduced. Description of the Drawings

[0019] Figure 1 is the front view of the 66 kV prefabricated substation of the present utility model;

[0020] Figure 2 is the top view of the 66 kV prefabricated substation of the present utility model;

[0021] Figure 3 is the installation relationship diagram of the current transformer and the transformer high-voltage bushing in the present utility model.

[0022] In the figure: 1, 66 kV high-voltage chamber; 2, gas-insulated high-voltage circuit breaker or high-voltage load switch; 3, high-voltage bushing; 4, low-voltage chamber; 5, 66 kV transformer; 6, oil tank; 7, transformer high-voltage bushing; 8, current transformer; 9, high-voltage switchgear; 10, high-voltage chamber; 11, outgoing line through-wall bushing; 12, low-voltage conductive rod; 13, low-voltage switchgear; 14, base; 15, first cabinet door; 16, second cabinet door; 17, high-voltage winding; 18, high-voltage lead. Detailed Embodiments

[0023] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear and understandable, the following further describes the utility model in conjunction with the drawings and embodiments.

[0024] As Figures 1-3As shown in the figure, the utility model provides a prefabricated substation of 66 kV class, which includes a 66 kV high-voltage chamber 1, a low-voltage chamber 4 and a 66 kV transformer 5. An inflatable high-voltage circuit breaker or a high-voltage load switch 2 is fixedly arranged in the 66 kV high-voltage chamber 1, and a high-voltage bushing 3 fixedly connected with the inflatable high-voltage circuit breaker or the high-voltage load switch 2 is also provided. The 66 kV transformer 5 is fixedly arranged between the 66 kV high-voltage chamber 1 and the low-voltage chamber 4. The 66 kV transformer 5 is an oil-immersed transformer, and a transformer high-voltage bushing 7 is fixedly connected to its oil tank 6. One end of the transformer high-voltage bushing 7 is inserted into the oil tank 6, and a current transformer 8 is fixedly arranged in the oil tank 6. The current transformer 8 is electrically connected with the transformer high-voltage bushing 7.

[0025] For this prefabricated substation, the 66 kV transformer 5 is located in the middle, and the 66 kV high-voltage chamber 1 and the low-voltage chamber 4 are respectively arranged on both sides of the 66 kV transformer 5. The 66 kV high-voltage chamber 1, the low-voltage chamber 4 and the 66 kV transformer 5 are fixedly integrated side by side to form a prefabricated substation in the shape of a Chinese character "mu". Compared with the traditional prefabricated substation where the high-voltage chamber and the low-voltage chamber are both arranged on the same side of the transformer, the width of the prefabricated substation in the shape of a Chinese character "mu" is reduced, which is more convenient for vehicle transportation.

[0026] At the same time, directly fixing the high-voltage current transformer 8 inside the oil tank 6 of the 66 kV transformer 5 can effectively reduce the volume of the prefabricated substation, and at the same time save the accommodation space cost originally required for the current transformer 8 on the 66 kV transformer 5.

[0027] Furthermore, when assembling the 66 kV high-voltage chamber 1 and the 66 kV transformer 5, the head of the oil tank 6 is extended and fixed in the 66 kV high-voltage chamber 1, so that the current transformer 8 inserted into the oil tank 6 can be placed in the 66 kV high-voltage chamber 1.

[0028] Furthermore, a high-voltage cabinet 9 and a high-voltage chamber 10 are fixedly arranged in the 66 kV high-voltage chamber 1. The inflatable high-voltage circuit breaker or the high-voltage load switch 2 is arranged in the high-voltage cabinet 9, and both the high-voltage bushing 3 and the transformer high-voltage bushing 7 are arranged in the high-voltage chamber 10.

[0029] Isolating the inflatable high-voltage circuit breaker or the high-voltage load switch 2 separately is safer. Correspondingly, the high-voltage cabinet 9 is equipped with a first cabinet door 15, and the high-voltage chamber 10 is equipped with a second cabinet door 16. The first cabinet door 15 and the second cabinet door 16 are arranged on the same side of the 66 kV high-voltage chamber 1. When observation or maintenance is needed, only the first cabinet door 15 or the second cabinet door 16 needs to be opened, which is more convenient.

[0030] Furthermore, the inflatable high-voltage circuit breaker or the high-voltage load switch 2 is preferably an inflatable circuit breaker, and the inflatable circuit breaker can further reduce the volume of the prefabricated substation.

[0031] Further, an outgoing line wall bushing 11 is fixed to the top of the 66 kV high-voltage compartment 1. In traditional high-voltage outgoing lines, the bottom cable outgoing method is adopted. When the transmission line is in the form of an overhead line, after the bottom outgoing, it is necessary to re-lead it to the transmission tower at the top of the substation, increasing the lead-in process. However, by presetting the high-voltage outgoing line of the prefabricated substation as the top outgoing method, compared with the traditional bottom cable threading, it saves the lead-in material, reduces the cost of the outgoing cable and the cost of the jump wire for the lead-up line, and further reduces the investment cost of the wind power / solar power plant.

[0032] Further, a low-voltage conducting rod 12 is fixedly connected to the 66 kV transformer 5, and the low-voltage conducting rod 12 is arranged at the connection position between the 66 kV transformer 5 and the low-voltage compartment 4.

[0033] Further, a low-voltage switchgear 13 is fixed in the low-voltage compartment 4, and low-voltage power distribution equipment is arranged in the low-voltage switchgear 13.

[0034] Further, the bottoms of the 66 kV high-voltage compartment 1, the 66 kV transformer 5, and the low-voltage compartment 4 are all fixed on the same base 14. By using the same base 14, the 66 kV high-voltage compartment 1, the 66 kV transformer 5, and the low-voltage compartment 4 are integrated into one body, which is beneficial to the combination of the three and facilitates transportation and on-site installation.

[0035] Further, a high-voltage winding 17 is fixed in the oil tank 6. A high-voltage lead 18 is connected between the high-voltage winding 17 and the transformer high-voltage bushing 7. The high-voltage lead 18 passes through the current transformer 8, or one end of the transformer high-voltage bushing 7 inserted into the oil tank 6 directly passes through the current transformer 8.

[0036] The utility model adopts an air-filled circuit breaker and the method of directly inserting the current transformer 8 into the oil tank 6 to reduce the volume of the prefabricated substation, and adopts the method of arranging the 66 kV high-voltage compartment 1 and the low-voltage compartment 4 on both sides of the 66 kV transformer 5 respectively to reduce the width of the prefabricated substation. By reducing the volume and width of the prefabricated substation, the transportation difficulty of the 66 kV prefabricated substation is reduced.

[0037] The above are only the preferred embodiments of the utility model and are not intended to limit the utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the utility model shall fall within the protection scope of the utility model.

Claims

1. A 66kV prefabricated substation, characterized in that: include: A 66 kV high-voltage chamber (1), wherein a gas-filled high-voltage circuit breaker or a high-voltage load switch (2) and a high-voltage bushing (3) connected to the gas-filled high-voltage circuit breaker or the high-voltage load switch (2) are arranged in the 66 kV high-voltage chamber (1); Low pressure chamber (4); A 66 kV transformer (5), the 66 kV transformer (5) being fixedly arranged between the 66 kV high voltage chamber (1) and the low voltage chamber (4), the 66 kV transformer (5) being an oil-immersed transformer and having an oil tank (6) thereof fixedly connected to a transformer high voltage bushing (7), one end of the transformer high voltage bushing (7) being inserted into the oil tank (6), a current transformer (8) being fixedly arranged in the oil tank (6), and the current transformer (8) being electrically connected to the transformer high voltage bushing (7).

2. A 66kV prefabricated substation according to claim 1, characterized in that: A high-voltage cabinet (9) and a high-voltage chamber (10) are fixedly arranged in the 66 kV high-voltage chamber (1); the inflatable high-voltage circuit breaker or high-voltage load switch (2) is arranged in the high-voltage cabinet (9); and the high-voltage bushing (3) and the transformer high-voltage bushing (7) are both arranged in the high-voltage chamber (10).

3. A 66kV prefabricated substation according to claim 2, characterized in that: The high-voltage cabinet (9) is provided with a first cabinet door (15), and the high-voltage chamber (10) is provided with a second cabinet door (16); the first cabinet door (15) and the second cabinet door (16) are arranged on the same side of the 66 kV high-voltage chamber (1).

4. A 66kV prefabricated substation according to claim 1, characterized in that: An outlet wall bushing (11) is fixed on the top of the 66 kV high voltage chamber (1).

5. A 66kV prefabricated substation according to claim 1, characterized in that: A low-voltage conductive rod (12) is fixedly connected to the 66 kV transformer (5), and the low-voltage conductive rod (12) is arranged at a connection position between the 66 kV transformer (5) and the low-voltage chamber (4).

6. A 66kV prefabricated substation according to claim 1, characterized in that: A low-voltage cabinet (13) is fixed in the low-voltage room (4), and a low-voltage power distribution device is arranged in the low-voltage cabinet (13).

7. A 66kV prefabricated substation according to claim 1, characterized in that: The bottoms of the 66 kV high voltage chamber (1), the 66 kV transformer (5) and the low voltage chamber (4) are all fixed on the same base (14).

8. A 66kV prefabricated substation according to claim 1, characterized in that: A high-voltage winding (17) is fixed in the oil tank (6), a high-voltage lead (18) is connected between the high-voltage winding (17) and the transformer high-voltage bushing (7), and the high-voltage lead (18) passes through the current transformer (8).

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