CN216121819U

CN216121819U - Main wiring type structure of photovoltaic power station

Info

Publication number: CN216121819U
Application number: CN202122783484.XU
Authority: CN
Inventors: 邓鹏�; 李宇强; 李建辉; 何垒
Original assignee: Southwest Electric Power Design Institute Co Ltd of China Power Engineering Consulting Group
Current assignee: Southwest Electric Power Design Institute Co Ltd of China Power Engineering Consulting Group
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-03-22
Anticipated expiration: 2031-11-15

Abstract

The utility model discloses a main wiring type structure of a photovoltaic power station, which comprises a main transformer, a main bus, branch buses, a circuit breaker, a bus and a photovoltaic booster transformer, wherein the main transformer is connected with the branch buses; the photovoltaic step-up transformer with converge the busbar and be connected, converge the busbar with the circuit breaker is connected, the circuit breaker with branch's generating line is connected, branch's generating line with a main transformer is connected. The utility model reduces the number of main transformers, simplifies the system structure, saves the occupied land, reduces the investment, realizes the wiring structure of a single main transformer corresponding to a plurality of bus bars, and solves the problems of high investment and poor economical efficiency of conventional wiring.

Description

Main wiring type structure of photovoltaic power station

Technical Field

The utility model relates to the technical field of photovoltaic power generation, in particular to a main wiring type structure of a photovoltaic power station.

Background

Under the background of carbon peak reaching, carbon neutralization and large online price balancing of '30/60', the installed scale of a photovoltaic power station is increasing day by day, and the cost control is more and more important. The capacity upper limit of a single 35kV bus is about 150MW due to the rated current limit of a 35kV circuit breaker, so that 2 or 3 bus bars must be arranged in a 150 MW-300 MW photovoltaic power station. If each bus is sent out through 1 main transformer, the investment is too high, and the economical efficiency is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art, and provides a main wiring type structure of a photovoltaic power station, which reduces the number of main transformers, simplifies the system structure, saves the occupied land, reduces the investment, realizes the wiring of a single main transformer corresponding to a plurality of bus bars, and solves the problems of high investment and poor economy of conventional wiring.

The purpose of the utility model is realized by the following scheme:

a main wiring type structure of a photovoltaic power station comprises a main transformer, a main bus, branch buses, a circuit breaker, a bus and a photovoltaic booster transformer; the photovoltaic step-up transformer with converge the busbar and be connected, converge the busbar with the circuit breaker is connected, the circuit breaker with branch's generating line is connected, branch's generating line with a main transformer is connected.

Further, the main bus is a bus provided with a closed structure.

Further, the main bus comprises an insulated copper tube bus.

Further, the main bus bar comprises a 35kv main bus bar, and the branch bus bar 35kv branch bus bar.

Further, the bus bars each include a 35kv bus bar.

Further, the circuit breaker includes a 35kv circuit breaker.

The utility model has the beneficial effects that:

in the embodiment of the utility model, a 35kV bus bar is connected with a closed bus or an insulating copper tube bus branch bus bar through a 35kV circuit breaker, and each branch bus bar is connected to a main bus bar and then sent out through 1 main transformer. Compared with the method that each bus is sent out through 1 main transformer, the number of the main transformers is reduced, the system structure is simplified, the occupied area is saved, and the investment is reduced.

Drawings

The drawings in the following description are only some embodiments of the utility model, and other drawings can be derived by those skilled in the art without inventive exercise.

FIG. 1 is a wiring structure diagram of two 35kV bus bars according to an embodiment of the present invention;

fig. 2 is a wiring structure diagram of a three-stage 35kV bus bar in the embodiment of the utility model.

Detailed Description

All of the features disclosed in all of the embodiments in this specification, or all of the steps in all of the methods or processes implicitly disclosed, may be combined or substituted in any way, except where mutually exclusive features and/or steps are present.

As shown in fig. 1 and 2, a main wiring type structure of a photovoltaic power station includes a main transformer, a main bus, a branch bus, a circuit breaker, a bus and a photovoltaic step-up transformer; the photovoltaic step-up transformer is connected with a bus bar, the bus bar is connected with a circuit breaker, the circuit breaker is connected with a branch bus, and the branch bus is connected with a main transformer.

In an alternative embodiment of the utility model, the main bus bar is a bus bar provided with an enclosure structure.

In an alternative embodiment of the utility model, the main bus bar comprises an insulated copper tube bus bar.

In an alternative embodiment of the utility model, the main busbars comprise 35kv main busbars and the branch busbars 35kv branch busbars.

In an optional embodiment of the present invention, the bus bars each include a 35kV bus bar, including two 35kV bus bars, three 35kV bus bars, and the like, which correspond to a two-section 35kV bus bar wiring structure and a three-section 35kV bus bar wiring structure, as shown in fig. 1 and 2.

In an alternative embodiment of the utility model, the circuit breaker comprises a 35kv circuit breaker.

Other embodiments of the utility model: the 35kV closed bus or the insulated copper tube bus is adopted to connect the 35kV side of the main transformer and the 35kV bus bar, the 35kV closed bus or the insulated copper tube bus bar is divided into a main bus bar and a branch bus bar, the main bus bar is directly connected with the 35kV side of the main transformer, the branch bus bar is connected with each section of the 35kV bus bar through a 35kV circuit breaker, and the photovoltaic booster transformer is connected with the 35kV bus bar.

Other embodiments of the present invention have the following advantages: the 35kV bus bar is connected with the closed bus bar or the branch bus bar of the insulating copper tube bus bar through the 35kV circuit breaker, and each branch bus bar is connected to the main bus bar and then sent out through the main transformer. Compared with the method that each bus is sent out through one main transformer, the number of the main transformers is reduced, the system structure is simplified, the occupied area is saved, and the investment is reduced.

Other embodiments than the above examples may be devised by those skilled in the art based on the foregoing disclosure, or by adapting and using knowledge or techniques of the relevant art, and features of various embodiments may be interchanged or substituted and such modifications and variations that may be made by those skilled in the art without departing from the spirit and scope of the present invention are intended to be within the scope of the following claims.

Claims

1. A main wiring type structure of a photovoltaic power station is characterized by comprising a main transformer, a main bus, branch buses, a circuit breaker, a bus bar and a photovoltaic booster transformer; the photovoltaic step-up transformer with converge the busbar and be connected, converge the busbar with the circuit breaker is connected, the circuit breaker with branch's generating line is connected, branch's generating line with a main transformer is connected.

2. The photovoltaic power plant main wiring pattern structure of claim 1, wherein the main bus bar is a bus bar provided with an enclosure structure.

3. The photovoltaic power plant primary wiring pattern structure of claim 1, wherein the primary bus bar comprises an insulated copper tube bus bar.

4. The main connection type structure of a photovoltaic power station as claimed in any one of claims 1 to 3, wherein the main bus bar comprises a 35kv main bus bar, and the branch bus bar comprises a 35kv branch bus bar.

5. The photovoltaic power plant main wiring pattern structure according to any one of claims 1 to 3, wherein the bus bars each include a 35kv bus bar.

6. The main wiring type structure of a photovoltaic power station as claimed in any one of claims 1 to 3, wherein the breaker comprises a 35kv breaker.