CN204497637U - A kind of photovoltaic generation integral type transformer station - Google Patents

Abstract

The utility model discloses a photovoltaic power generation integrated substation. The substation includes a dry-type transformer, a high-voltage room and an inverter room; The chamber is located on the left side of the substation, and they are arranged in a zigzag structure. The high-voltage room includes high-voltage incoming line cabinets and high-voltage outgoing line cabinets. Isolation switches and sensors are installed inside the high-voltage incoming line cabinets, and lightning arresters, fuses, grounding switches, and load switches are installed inside the high-voltage outgoing line cabinets; DC cabinets, Inverter cabinet, AC cabinet. The substation has the characteristics of reasonable and compact structure, low production cost, safe and reliable performance, beautiful appearance, and convenient maintenance. It can realize the non-stop maintenance of transformers for high-voltage incoming lines.

Description

A photovoltaic power generation integrated substation

technical field

The utility model relates to the field of voltage transformation devices, in particular to a photovoltaic power generation integrated substation.

Background technique

The photovoltaic power generation integrated substation is used to generate 22V direct current from solar panels, and the voltage is finally converted to AC 10kV or 35kV through the integrated substation and then sent to the grid. Existing photovoltaic power generation equipment generally has inverters and box-type transformers assembled separately, which occupies a large area and has poor integration. The inverter and box-type transformers pass through buried cables, which requires a large amount of construction. The low-voltage side of the transformer also requires installation protection to protect against the shortcomings of repeated cable failures that are not easy to detect, unreasonable structural design, and inconvenient maintenance.

Utility model content

In order to solve the above-mentioned problems existing in existing photovoltaic power generation equipment, the utility model provides a photovoltaic power generation integrated substation, and the technical solution adopted is:

The substation includes a transformer, a high-voltage room and an inverter room; the transformer is located in the middle of the substation, the high-voltage room is located on the right side of the substation, and the inverter room is located on the left side of the substation. The transformer, high-voltage room and inverter The inverter chamber is in the shape of a mesh, and the inverter chamber is integrated with the transformer.

The utility model has the characteristics of low production cost, safe and reliable performance, beautiful appearance, convenient inspection and maintenance, and can realize the characteristics of high-voltage incoming line non-stop inspection and maintenance of transformers and the like.

Description of drawings

Fig. 1 is the structural representation of the present utility model: comprise low-voltage busbar (9), dry-type transformer (10), high-voltage cable (11), load switch (12) and fuse (24);

Fig. 2 is a top view of Fig. 1: including an inverter room (1), a transformer room (2), a high-voltage room (3), a lower wellhead (4), a high-voltage incoming line cabinet (22), and a high-voltage outgoing line cabinet (23);

Fig. 3 is the left view of Fig. 1: DC switch (13), (14), microcomputer protection device (15), frame circuit breaker (16), DC cabinet (17), (18), inverter cabinet (19), AC cabinet (20) and ventilation device (21);

Fig. 4 is the right view of Fig. 1: high-voltage incoming cable (5), sensor (6), isolating switch (7), lightning arrester (8).

Detailed ways

Below in conjunction with accompanying drawing 1 to Fig. 4, the utility model is further described:

In one embodiment, the utility model discloses a photovoltaic power generation integrated substation, the substation includes a transformer, a high-voltage room and an inverter room; the transformer is located in the middle of the substation, the high-voltage room is located on the right side of the substation, and the inverter room Located on the left side of the substation, the transformer, high-voltage room and inverter room are arranged in a mesh-shaped structure, and the inverter room is integrated with the transformer.

In one embodiment, a high-voltage incoming cabinet and a high-voltage outgoing cabinet are installed in the high-voltage chamber, isolating switches and sensors are installed inside the high-voltage incoming cabinet, and lightning arresters, fuses, grounding switches and load switches are installed inside the high-voltage outgoing cabinet.

In one embodiment, a wellhead is reserved inside the high-pressure chamber.

In one embodiment, there are a DC cabinet, an inverter cabinet and an AC cabinet inside the inverter room.

In one embodiment, one side of the transformer is connected to the high-voltage incoming cabinet, and the other side is connected to the AC cabinet in the inverter room.

In one embodiment, the high-voltage incoming cabinet is equipped with sensors, electromagnetic locks, and electrification indicators for realizing electrical interlocking.

In one embodiment, the high-voltage outlet cabinet is also equipped with sensors, electromagnetic locks, and electrification indicators, which can realize electrical interlocking. At the same time, the load switch is equipped with a rotating link, which can realize mechanical interlocking.

The electrical interlocking and mechanical interlocking in this embodiment can make the substation achieve double protection.

In one embodiment, the transformer is a dry-type transformer.

In one embodiment, the substation converts the 22V direct current generated by photovoltaic power generation into a 315V alternating current through a DC cabinet and an inverter, and then raises the alternating current to 10kV or 35kV through a dry-type transformer , and finally output the raised AC power from the high-voltage outlet cabinet to the grid.

The fuse is installed in the load switch room, and the isolating switch is located in the high-voltage cable room. After the power is cut off, an obvious fracture can be seen to facilitate the replacement of the fuse and the maintenance of the transformer, so the performance of a single substation is realized when the line is not stopped; the isolating switch, load switch It can realize mechanical and electric operation, and the high-voltage cable room and load switch room can realize five defenses, and the lines are clearly visible and convenient for maintenance.

Therefore, the utility model has the characteristics of low production cost, safe and reliable performance, beautiful appearance, and convenient maintenance.

In one embodiment, as shown in Figure 1, Figure 2, Figure 3 and Figure 4, the dry-type transformer (10) is located in the middle of the substation, the high voltage chamber (3) is located on the right side of the substation, and the inverter room (1) Located on the left side of the substation, they are arranged in a zigzag structure. The high-voltage chamber is a high-voltage incoming line cabinet (22) and a high-voltage outgoing line cabinet (23). A disconnector (7) and a sensor (6) are installed inside the high-voltage incoming line cabinet (22), and a lightning arrester ( 8), fuse (24), grounding knife, load switch (12), the wellhead (4) is also reserved inside the high-voltage chamber, and there are DC cabinets (17), (18), inverter chamber (1) inside Transformer cabinet (19), AC cabinet (20). One side of the dry-type transformer is connected with the high-voltage incoming cabinet (23), and one side is connected with the AC cabinet (20) in the inverter room (1). High-voltage incoming line cabinet (22) is equipped with sensor (6), electromagnetic lock, electrified indicator, can realize electrical interlocking; The connecting rod can realize mechanical interlocking, so that the substation can achieve double protection. The substation has the characteristics of reasonable and compact structure, low production cost, safe and reliable performance, beautiful appearance, and convenient maintenance. It can realize the non-stop maintenance of transformers for high-voltage incoming lines.

The working process of this substation is: the direct current sent by the solar panel is 22V, enters the integrated substation through the combiner box, converts the DC cabinets (17), (18) into AC 315V through the inverter (19), and converts the direct current through the dry-type transformer The voltage rises to 10kV or 35KV, and is finally output to the grid through the high-voltage incoming cabinet (22) by the high-voltage outgoing cabinet (23).

The substation provided by the utility model has been introduced in detail above. In this paper, specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the method and core idea of the present invention. Simultaneously, for those of ordinary skill in the art, according to the thought of the utility model, there will be changes in the specific implementation and scope of application. .

Claims (9)

1. A photovoltaic power generation integrated substation, the substation includes a transformer, a high-voltage room and an inverter room; it is characterized in that: the transformer is located in the middle of the substation, the high-voltage room is located on the right side of the substation, and the inverter room Located on the left side of the substation, the transformer, high-voltage room and inverter room are in a mesh-shaped structure, and the inverter room is integrated with the transformer. 2. The substation according to claim 1, characterized in that: a high-voltage incoming cabinet and a high-voltage outgoing cabinet are installed inside the high-voltage chamber, an isolating switch is installed inside the high-voltage incoming cabinet, and a lightning arrester and a fuse are installed inside the high-voltage outgoing cabinet. device, grounding knife and load switch. 3. The substation according to claim 1, characterized in that: a lower wellhead is reserved inside the high-voltage chamber. 4. The substation according to claim 2, wherein a DC cabinet, an inverter cabinet and an AC cabinet are installed inside the inverter room. 5. The substation according to claim 4, characterized in that one side of the transformer is connected to the high-voltage incoming cabinet, and the other side is connected to the AC cabinet room in the inverter. 6. The substation according to claim 2, characterized in that: the high-voltage incoming cabinet is also equipped with sensors, electromagnetic locks and electrification indicators for realizing electrical interlocking. 7. The substation according to claim 2, characterized in that: the high-voltage outlet cabinet is equipped with sensors, electromagnetic locks, and electrification indicators for realizing electrical interlocking, and the load switch is equipped with a rotating connecting rod for realizing mechanical interlocking. chain. 8. The substation according to claim 1, wherein the transformer is a dry-type transformer. 9. The substation according to claim 8, characterized in that: the substation converts the 22V direct current generated by photovoltaic power generation into 315V alternating current through a DC cabinet and an inverter, and then converts the 22V direct current into a 315V alternating current through a dry-type transformer. The alternating current is raised to 10kV or 35kV, and finally the raised alternating current is output from the high-voltage outlet cabinet to the grid.