CN203839947U - Substation system in composite structure - Google Patents

Abstract

The utility model relates to a substation system with a composite structure, including a hub station, a central substation, an intermediate substation and a terminal substation connected by a power grid. The hub station is provided with 4 to 8 sets of transformers, and one and a half circuit breakers are used for wiring, and 16-24 The outgoing line of the circuit is connected to the central substation, which is equipped with 3-4 main transformers, and adopts double-bus double-section wiring to receive power from the hub station or power plant, and the incoming and outgoing lines of the 9-20 loop are connected to the intermediate substation and/or terminal substation Connection, the intermediate substation adopts double-bus, double-bus single-section, double-bus double-section connection to receive power, and sets 6-12 return lines to connect with the central substation, other intermediate substations or terminal substations, and the terminal substation does not transmit to other substations Electricity, wiring uses a transformer with a circuit breaker line. The utility model connects different substations, is convenient for line detection and maintenance, and has safe current transmission.

Description

A Composite Substation System

technical field

The utility model relates to a substation, in particular to a substation system with a composite structure.

Background technique

Most of the existing substations on the market have single functions. In addition, for substations suitable for different situations and occasions, it is impossible to connect them in series through an effective network, so that the application of substations tends to be maximized. Therefore, how to design a substation system with a wide range of composite structures has become an urgent problem to be solved. technical problem.

Utility model content

The purpose of this utility model is to provide a substation system with a composite structure that connects different substations and facilitates line inspection and maintenance in order to overcome the above-mentioned defects in the prior art.

The purpose of this utility model can be achieved through the following technical solutions:

A substation system with a composite structure, including hub stations, central substations, intermediate substations and terminal substations connected through the grid,

The hub station is generally equipped with 4 main transformers, and the transformers are connected with half circuit breakers, and the outgoing lines of the 16-24 circuit are set to connect with the central substation.

The central substation is equipped with 3-4 main transformers, and adopts double-bus double-section wiring to receive power from the hub station or power plant, and the incoming and outgoing lines of the 9-20 loop are set to connect with the intermediate substation or the terminal substation.

All or part of the circuits in the intermediate substation receive power from the central substation or other substations, and use double busbars, double busbar single-section, and double-busbar double-section wiring to connect and receive power. substation or terminal substation connection,

The terminal substation does not transmit power to other substations, and a transformer with a circuit breaker is used for wiring.

The hub station is a 500kV substation, and the main transformer used is a double-winding transformer with a capacity of 750MVA-1500MVA.

The capacity of the main transformer is preferably 750MVA, 1000MVA, 1200MVA or 1500MVA.

The central substation is a 220kV substation, and the main transformer used is a three-winding transformer with a capacity of 180MVA-300MVA.

The capacity of the main transformer is preferably 180MVA, 240MVA, 300MVA.

The intermediate substation is a 220kV substation, and a three-winding or double-winding transformer is arranged in the intermediate substation.

The terminal substation is a 220kV substation, and a three-winding transformer is installed in the terminal substation.

The power grid is a power transmission network composed of large-section overhead wires and cables.

Compared with the prior art, the utility model has the following advantages:

(1) Main transformers with different capacities are used for substations applicable to different voltages;

(2) Different circuits and wiring methods are adopted for different substations to ensure the safety performance of current transmission.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure, 1 is a hub station, 2 is a central substation, 3 is an intermediate substation, 4 is a terminal substation, 5 is a large-section overhead line, 6 is a double-winding transformer, and 7 is a three-winding transformer.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example

A substation system with a composite structure, the structure of which is shown in Figure 1, includes a hub station 1, a central substation 2, an intermediate substation 3 and a terminal substation 4 connected via a power grid. delivery network.

Junction station 1 is a 500kV substation with 4 main transformers, which are double-winding transformers 6 with a capacity of 750MVA-1500MVA. In this embodiment, the capacity of the double-winding transformer 6 is 750MVA, 1000MVA, 1200MVA or 1500MVA. One and a half circuit breakers are used for wiring, and the outgoing line of the 16-24 circuit is set to connect with the central substation. The central substation 2 is a 220kV substation with 3-4 main transformers. In this embodiment, there are 3 three-winding transformers 7 with a capacity of 180MVA-300MVA. In this embodiment, the capacities of the main transformers are 180MVA, 240MVA, and 300MVA. Double-bus double-section wiring is used to receive power from the hub station or power plant, and the incoming and outgoing lines of 9-20 circuits are connected to the intermediate substation or terminal substation. The intermediate substation is a 220kV substation, and all or part of the 3 circuits receive power from the central substation or other substations. , use double-bus, double-bus single-section, double-bus double-section wiring connection to receive power, set up 6-12 incoming and outgoing lines to connect with central substation 2, other substations 3 or terminal substation 4. Terminal substation 4 is a 220kV substation, which does not transmit power to other substations, and is connected with a transformer with a circuit breaker.

Claims (8)

1. A substation system of a composite structure, characterized in that it comprises a hub station, a central substation, an intermediate substation and a terminal substation connected through a power grid, The hub station is equipped with 4 main transformers, and the transformers are connected with one and a half circuit breakers, and the outgoing lines of the 16-24 circuit are connected to the central substation. The central substation is equipped with 3-4 main transformers, and adopts double-bus double-section wiring to receive power from the hub station or power plant, and the incoming and outgoing lines of the 9-20 loop are set to connect with the intermediate substation or the terminal substation. All or part of the circuits in the intermediate substation receive power from the central substation or other substations, and use double busbars, double busbar single-section, and double-busbar double-section wiring to connect and receive power. substation or terminal substation connection, The terminal substation does not transmit power to other substations, and a transformer with a circuit breaker is used for wiring. 2. A substation system with a composite structure according to claim 1, wherein the hub station is a 500kV substation, and the main transformer used is a double-winding transformer with a capacity of 750MVA-1500MVA. 3. A substation system with composite structure according to claim 1, characterized in that the capacity of said main transformer is preferably 750MVA, 1000MVA, 1200MVA or 1500MVA. 4. The substation system with composite structure according to claim 2, wherein the central substation is a 220kV substation, and the main transformer used is a three-winding transformer with a capacity of 180MVA-300MVA. 5. A substation system with composite structure according to claim 4, characterized in that the capacity of said main transformer is preferably 180MVA, 240MVA, 300MVA. 6. A substation system with composite structure according to claim 3, characterized in that the intermediate substation is a 220kV substation, and a double-winding or three-winding transformer is arranged in the intermediate substation. 7. A substation system with composite structure according to claim 4, characterized in that the terminal substation is a 220kV substation, and a three-winding transformer is arranged in the terminal substation. 8. A substation system with composite structure according to any one of claims 1-7, characterized in that the power grid is a power transmission network composed of large-section overhead wires and cables.