On-site boosting power transformation equipment for land wind power

Abstract

The utility model mainly relates to the technical field of wind power generation. In order to reduce the occupied area of land step-up power transformation equipment and the energy loss in the power transmission process, the utility model provides land wind power on-site step-up power transformation equipment, which comprises a tower drum body, a 66KV transformer, a 72.5 KV gas insulation closed type combined electric appliance and a voltage transformer, a plurality of layers of platforms are arranged in the tower drum, the 66KV transformer and the 72.5 KV gas insulation closed type combined electric appliance are arranged on the platforms of different layers in the tower drum body, the 66KV transformer is connected with the 72.5 KV gas insulation closed type combined electric appliance through a 66KV cable, the voltage transformer is connected with the 72.5 KV gas insulation closed type combined electric appliance, and the 66KV cable is connected with the 66KV cable. Energy loss in the power transmission process and the occupied area of equipment can be effectively reduced, and the device is suitable for long-distance power transmission.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of wind power generation, in particular to a local step-up substation equipment for onshore wind power. Background Technique

[0002] Wind power is a pollution-free and renewable clean energy. The onshore wind power generation technology is mature, with high power generation and good efficiency. The 35kV box-type substation equipment is a common equipment in the market. At present, most of the local step-up in domestic onshore wind farms adopts the 35kV voltage level, and the 35kV box-type substation is usually arranged outside the tower barrel. However, with the construction of large wind power bases, the single-machine capacity of wind turbines is increasing continuously. At present, the single-machine capacity of wind turbines used by mainstream wind turbine manufacturers for onshore wind power has reached 8MW, and even there are wind turbines with a capacity of more than 10MW about to be put into operation. Using the 35kV voltage level for the collector line of large base projects will lead to problems such as too many transmission circuit numbers, too long line lengths, excessive power losses, too long collection lines for remote wind turbines, and unqualified voltage drops. Moreover, there are also problems such as greater construction difficulty and difficult land acquisition during the construction period. Content of the Utility Model

[0003] Technical Problems to be Solved by the Utility Model

[0004] To provide a local step-up substation equipment for onshore wind power, aiming to reduce the number of collector lines and energy losses used by onshore step-up substation equipment.

[0005] Technical Solutions Adopted by the Utility Model to Solve the Above Technical Problems

[0006] A local step-up substation equipment for onshore wind power includes a tower barrel body, a 66kV transformer, a 72.5kV gas-insulated metal-enclosed switchgear and a voltage transformer. There are multiple layers of platforms inside the tower barrel. The 66kV transformer and the 72.5kV gas-insulated metal-enclosed switchgear are arranged on platforms at different levels inside the tower barrel body. The 66kV transformer is connected to the 72.5kV gas-insulated metal-enclosed switchgear through a 66kV cable. The voltage transformer is connected to the 72.5kV gas-insulated metal-enclosed switchgear. A tower barrel door is arranged on the outer surface of the tower barrel.

[0007] Further, a control cubicle is arranged outside the 72.5kV gas-insulated metal-enclosed switchgear, and a protective coating is arranged on the outer surface of the control cubicle.

[0008] Further, the local step-up substation equipment for onshore wind power further includes a cable chamber, and the busbar of the cable chamber is connected to the terminal of the 66kV transformer through a cable.

[0009] Advantageous Effects of the Utility Model

[0010] The utility model can effectively reduce the energy loss during power transmission by combining and arranging a 66kV high-voltage transformer and a 72.5kV gas-insulated switchgear inside the tower barrel body. It is more suitable for long-distance power transmission and can transmit the power of the wind farm to the power grid or load center at a long distance end. It can effectively reduce the number of collector lines required for power transmission, thereby reducing the floor area of the lines. At the same time, multiple platforms are arranged inside the tower barrel, and the in-situ step-up substation equipment, namely the 66kV high-voltage transformer and the 2.5kV gas-insulated switchgear, are arranged on the platforms at different levels of the wind turbine tower barrel, which can further reduce the floor area of the substation equipment and save land. Brief Description of the Drawings

[0011] Figure 1 It is a schematic structural diagram of the 66kV transformer layer inside the tower barrel body;

[0012] Figure 2 It is a schematic structural diagram of the 72.5kV gas-insulated switchgear inside the tower barrel body;

[0013] Figure 3 It is a schematic position diagram of the voltage transformer, cable chamber and control cubicle;

[0014] In the drawings: 1. Tower barrel body; 2. Platforms at different levels inside the tower barrel; 3. 66kV transformer; 4. Tower barrel door; 5. 72.5kV gas-insulated switchgear; 6. Voltage transformer; 7. Cable chamber; 8. Control cubicle. Detailed Description of the Invention

[0015] An onshore wind power in-situ step-up substation equipment, as Figure 1 and 2 shown, includes a tower barrel body 1, a tower barrel door 4 is opened on the tower barrel body 1, and platforms 2 at different levels are arranged inside the tower barrel body 1. A 66kV transformer 3 and a 72.5kV gas-insulated switchgear 5 are respectively arranged on the platforms 2 at different levels inside the tower barrel. The 66kV transformer 3 is connected to the 72.5kV gas-insulated switchgear 5 through a 66kV cable. The high-voltage electrical components inside the 72.5kV gas-insulated switchgear 5 are surrounded by SF6 gas with excellent insulation performance and arc extinguishing performance.

[0016] The voltage transformer 6 is connected to the 72.5kV gas-insulated switchgear 5. The voltage transformer 6 uses the principle of electromagnetic induction to convert high voltage into low voltage, ensuring that the measuring instruments and protection devices in the power system can safely and accurately measure and monitor the voltage state of the power system. Through the monitoring and protection functions of the voltage transformer 6, the stability of the power system can be improved, and system failures and power outages caused by abnormal voltage can be reduced.

[0017] AsFigure 3 As shown, a cable chamber 7 is provided outside the 72.5 kV gas-insulated switchgear 5. The cable chamber 7 provides a protection space for the cables, avoiding direct exposure of the cables to the external environment and preventing cable aging and damage caused by environmental factors such as rain, dust, and ultraviolet rays. At the same time, the cable chamber 7 is used to reduce the influence of external electromagnetic interference on the cables, improving the accuracy and reliability of the voltage transformer 6 measurement. The busbar of the cable chamber 7 connecting the cables is fixedly arranged at the bottom of the platform where the 72.5 kV gas-insulated switchgear 5 is located, aiming to provide a stable support structure, enhancing the overall stability of the step-up substation equipment and reducing the shaking and damage of the step-up substation equipment caused by the vibration of the fan or other external forces. Moreover, the cables are directly connected to the cable chamber 7 from the bottom of the platform where the 72.5 kV gas-insulated switchgear 5 is located, which can simplify the cable wiring process and improve the installation efficiency.

[0018] As Figure 3 shown, a control cubicle 8 is provided outside the 72.5 kV gas-insulated switchgear 5. The control cubicle 8 is used for centralized control and management of various equipment and parameters of the power system, facilitating operators to monitor and operate, and isolating the high-voltage electrical components from the operators, reducing the operation risk. The bottom of the control cubicle 8 is fixed on the plane where the 72.5 kV gas-insulated switchgear 5 is located, and a protective coating is provided on the outer surface of the control cubicle 8 to prevent the shell of the control cubicle 8 from being eroded by corrosive gases and liquids.

Claims

1. An on-site step-up transformer for onshore wind power, characterized in that: It includes a tower body, a 66kV transformer, a 72.5kV gas-insulated enclosed switchgear and a voltage transformer. A multi-layer platform is arranged inside the tower. The 66kV transformer and the 72.5kV gas-insulated enclosed switchgear are arranged on platforms at different levels inside the tower body. The 66kV transformer is connected to the 72.5kV gas-insulated enclosed switchgear through a 66kV cable, and the voltage transformer is connected to the 72.5kV gas-insulated enclosed switchgear. A tower door is provided on the outer surface of the tower.

2. The on-site step-up transformer for onshore wind power according to claim 1, characterized in that: A control cabinet is arranged on the outside of the 72.5kV gas-insulated enclosed switchgear.

3. The on-site step-up transformer for onshore wind power according to claim 2, characterized in that: The outer surface of the control cabinet is provided with a protective coating.

4. The on-site step-up transformer for onshore wind power according to any one of claims 1 to 3, characterized in that: It also includes a cable room, the busbars in the cable room are connected to the 66kV transformer via cables.

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