CN208078653U - Double-bus and single busbar mixing wiring high voltage distribution installation - Google Patents

Abstract

The utility model provides a high-voltage power distribution device with double busbar and single busbar hybrid connection, including a first busbar, a second busbar, an incoming line unit, an outgoing line unit, and a busbar connection unit; the main transformer of the incoming line unit and the incoming line connection module The two outlets of the incoming connection module are respectively connected to the first bus and the second bus; the two incoming terminals of the double-female outlet connection module of the outlet unit are respectively connected to the first and second bus The outlet end of the double-female outlet connection module is connected to the double-female outlet module; the inlet end of the single-female outlet connection module of the outlet unit is connected to the first or second busbar, and the outlet end of the single-female outlet connection module It is connected with the single bus outlet module; one end of the bus tie unit is connected with the first bus, and the other end is connected with the second bus. The utility model not only has the reliability and flexibility of double busbars, but also has the economy of single busbar connection mode, which greatly saves investment and operation and maintenance costs.

Description

Double-bus and single-bus hybrid wiring high-voltage power distribution device

technical field

The utility model relates to the technical field of electric power, in particular to a high-voltage power distribution device with double-bus and single-bus hybrid wiring.

Background technique

As the power grid structure becomes stronger and stronger, basically high-voltage substations have two power sources. If there is only one power source, when the power side is overhauled or fails, the substation will have a power outage, which will seriously affect the power consumption of users. However, the current substations with a voltage level of 35-66kV, especially those in some remote areas, have simple networks and long transmission distances, and it is difficult to ensure two-circuit power supply. Therefore, measures need to be taken in upper-level substations and transmission lines to ensure And improve the safety and reliability of the power circuit.

In the prior art, a power distribution device in a high-voltage substation generally adopts a single-bus connection method or a double-bus connection method.

Figure 1 shows a single busbar wiring method, which includes a single busbar 11, a main transformer incoming line 12, outgoing line 13 and outgoing line 14. On the main transformer incoming line 12, the main transformer incoming line 12 is connected to the single bus 11 through the incoming line connection module 15 (consisting of circuit breakers and isolating switches connected in series in sequence), and the outgoing line 13 and outgoing line 14 are respectively passed through the outgoing line connection module 16 (consisting of disconnectors and circuit breakers in series in sequence) connected to the single bus 11. In this scheme, if the bus fails or is overhauled, all circuits on the bus must be powered off, seriously affecting the reliability of the circuit.

Figure 2 shows a double-bus connection method, which includes a bus 21, a bus 22, a main transformer incoming line 23, a bus tie compartment 24, outgoing lines 25 and 26. The main transformer incoming line 23 is connected to the incoming line end of the incoming line connection module 27 (consisting of circuit breakers and isolating switches connected in series in sequence), and the two outgoing line ends of the incoming line connection module 27 are respectively connected to the bus bar 21 and the bus bar 22, and the outgoing line 25 Connect with the outlet terminal of the outlet connection module 28, the two inlet terminals of the outlet connection module 28 (consisting of successively connected isolating switches and circuit breakers) are connected with the bus 21 and the bus 22 respectively, and the outlet 26 is connected with the outlet connection module 29 (by The outlet terminals of the disconnectors and circuit breakers connected in series) are connected to each other, the two inlet terminals of the outlet connection module 29 are respectively connected to the busbar 21 and the busbar 22, and the busbar communication compartment 24 (consisting of the circuit breaker and the disconnector) is used to connect Busbar 21 and busbar 22. In this scheme, when any one of the busbar 21 and the busbar 22 fails or is overhauled, each transformer and outgoing line can be switched to another normally operating busbar to continue supplying power. In this scheme, it is necessary to add a bus disconnector for each circuit, the project cost is high, and the maintenance is difficult.

Utility model content

In order to solve the above-mentioned problems in the prior art, the utility model provides a high-voltage power distribution device with mixed connection of double busbars and single busbars, which combines the economy of the single busbar connection method and the reliability and flexibility of the double busbar connection method .

The utility model provides a high-voltage power distribution device with double busbar and single busbar hybrid connection, comprising: a first busbar, a second busbar, an incoming line unit, an outgoing line unit and a busbar contact unit;

Wherein, the incoming line unit includes a main transformer and an incoming line connection module;

The incoming line connection module is composed of circuit breakers and isolating switches connected in series in sequence, and has one incoming line end and two outgoing line ends;

The outlet unit includes a double-female outlet module, a double-female outlet connection module, a single-female outlet module, and a single-female outlet connection module;

The double-female outgoing line connection module is composed of isolating switches and circuit breakers connected in series in sequence, and has two incoming line terminals and one outgoing line end;

The single-female outgoing line connection module is composed of isolating switches and circuit breakers connected in series in sequence, and has an input terminal and an output terminal;

The bus tie unit is composed of tie circuit breakers and isolating switches connected in series in sequence;

The main transformer is connected to the incoming line end of the incoming line connection module, and the two outgoing line ends of the incoming line connection module are respectively connected to the first bus bar and the second bus bar;

The two incoming wire ends of the double-female outlet connection module are respectively connected to the first bus and the second bus, and the outlet ends of the double-female outlet connection module are connected to the double-female outlet module;

The incoming line end of the single-female outlet connection module is connected to the first busbar or the second busbar, and the outlet end of the single-female outlet connection module is connected to the single-female outlet module;

One end of the bus tie unit is connected to the first bus, and the other end is connected to the second bus.

The utility model provides a double busbar and single busbar hybrid connection high-voltage power distribution device, which adopts a connection method that combines the single busbar connection method and the double busbar connection method, thereby improving the economy of the power distribution device and improving Power distribution unit reliability and flexibility. Because the incoming line connection module is to connect the main transformer to the first busbar and the second busbar at the same time, the incoming line connection module includes at least one incoming line terminal and two outgoing line terminals, one of which is connected to the first busbar, The other outlet end is connected with the second busbar. The two outlets can be adjusted independently without affecting each other, that is, the first busbar and the second busbar can be connected at the same time, or only one of the two busbars can be connected. The double bus outlet connection module is similar to the incoming line connection module, and includes at least two incoming line terminals, which are respectively connected to the first busbar and the second busbar.

Further, the number of double-female outlet modules and the number of double-female outlet connection modules are at least one.

Further, the number of single-female outlet modules and the number of single-female outlet connection modules are at least one.

Further, the number of the incoming line unit is at least one.

In order to adapt to the complex situation in the application of the power grid, the number of each module in the outlet unit of a high-voltage power distribution device with double busbar and single busbar hybrid connection provided by the utility model is not limited, and the number of each module can be flexibly set according to the actual situation , you only need to ensure that the number of double-female outlet modules is equal to the number of double-female outlet connection modules, and the number of single-female outlet modules is equal to the number of single-female outlet connection modules.

Further, the voltage levels of the first bus and the second bus are both 35kV, 66kV, 110kV, 220kV, 330kV or 500kV.

The device provided by the utility model has better adaptability and can be applied to various voltage levels, such as 35kV, 66kV, 110kV, 220kV, 330kV or 500kV.

Beneficial effect

The utility model provides a double-bus and single-bus hybrid connection high-voltage power distribution device, which not only ensures that the transformer and outgoing lines can be connected to two bus sections at the same time, has the reliability and flexibility of the double bus, but also simplifies the wiring of other circuits. way, thereby reducing the number of bus-side circuit breakers and isolating switches in the double-bus wiring mode, saving engineering costs, and having the economy of the single-bus wiring mode. At the same time, compared with the high-voltage power distribution device with double-bus connection mode in the prior art, the high-voltage power distribution device with mixed wiring greatly saves investment and operation and maintenance costs. Moreover, the device provided by the utility model can evenly distribute the load of each section of the busbar without complicated switching operations and reduce the workload of maintenance operators.

Description of drawings

Fig. 1 is a schematic diagram of a single bus connection mode in the prior art;

Fig. 2 is a schematic diagram of a dual-bus connection mode in the prior art;

Fig. 3 is a schematic structural diagram of a high-voltage power distribution device with double busbar and single busbar mixed connection provided by the embodiment of the present invention.

Detailed ways

In order to facilitate the understanding of the content of the utility model, the solutions of the utility model are further elaborated below in conjunction with specific embodiments.

Fig. 3 is a schematic structural diagram of a double-bus and single-bus hybrid connection high-voltage power distribution device provided by an embodiment of the utility model. In this embodiment, it includes a first bus 101, a second bus 102, an incoming line unit 200, and an outgoing line unit 300 and bus tie unit 400.

Wherein, the incoming line unit 200 includes a main transformer 201 and an incoming line connection module 202; the outgoing line unit 300 includes a double-female outgoing line module 301, a double-female outgoing line connection module 302, a first single-female outgoing line module 303, and a first single-female outgoing line connection module 304 , the second single-female outlet module 305 and the second single-female outlet connection module 306 .

Further, the voltage levels of the first bus and the second bus are both 35kV, 66kV, 110kV, 220kV, 330kV or 500kV. The device provided by the utility model has better adaptability and can be applied to various voltage levels, such as 35kV, 66kV, 110kV, 220kV, 330kV or 500kV.

Specifically, the main transformer 201 is connected to the incoming line end of the incoming line connecting module 202, and the two outgoing line ends of the incoming line connecting module 202 are respectively connected to the first bus bar 101 and the second bus bar 102; The two incoming wire ends are respectively connected with the first bus bar 101 and the second bus bar 102, and the outgoing wire ends of the double bus outlet connecting module 302 are connected with the double female outgoing wire module 301; The first bus 101 is connected, and the outlet end of the first single bus outlet connection module 304 is connected with the first single bus outlet module 303; the incoming line end of the second single bus outlet connection module 306 is connected with the second bus 102, and The outlet end of the two single-bus outlet connecting module 306 is connected to the second single-bus outlet module 305 ;

In this embodiment, the first busbar and the second busbar are arranged in parallel, the busbar connection unit is reasonably set, the incoming line unit is connected to the busbar by double busbar connection, and the outgoing line unit is connected to the busbar by double busbar connection and single busbar connection. Thus, a high-voltage power distribution device adopting a double busbar and single busbar mixed wiring mode is formed.

When the first busbar 101 is overhauled, the above-mentioned units operate according to the following steps:

Step 1: close the tie circuit breaker and disconnector of the bus tie unit 400, and connect the first bus 101 and the second bus 102;

Step 2: adjust the circuit breaker and isolating switch of the incoming line connection module 202 to connect the main transformer 201 to the second bus 102 and disconnect the main transformer 201 from the first bus 101;

Step 3: adjust the circuit breaker and isolating switch of the double-bus outlet connection module 302, so that the double-bus outlet module 301 is connected to the second bus 102, and at the same time, the double-bus outlet module 301 is disconnected from the first bus 101;

The fourth step: adjust the circuit breaker and the isolating switch of the first single bus outlet connection module 304 and the second single bus outlet connection module 306, so that the first single bus outlet module 303 is disconnected from the first bus 101, so that the second The single bus outlet module 305 is connected to the second bus bar 102;

Step 5: Disconnect the tie circuit breaker and isolating switch of the bus tie unit 400, and cut off the connection between the first bus 101 and the second bus 102;

Step 6: Overhaul the first bus bar 101 .

When the second busbar 102 needs to be overhauled, the operation steps are similar to the above, and will not be repeated here.

The utility model provides a double-bus and single-bus hybrid wiring high-voltage power distribution device, which not only ensures that the single power supply circuit can be connected to two bus sections at the same time, has the reliability and flexibility of the double bus, but also simplifies the wiring of other circuits. , thereby reducing the number of busbar side circuit breakers and isolating switches, saving engineering costs, and having the economy of single busbar wiring. At the same time, compared with the high-voltage power distribution device with double-bus connection mode in the prior art, the high-voltage power distribution device with mixed wiring greatly saves investment and operation and maintenance costs. Moreover, the device provided by the utility model can evenly distribute the load of each section of the busbar without complicated switching operations and reduce the workload of maintenance operators.

The above is only an embodiment of the utility model, and is not intended to limit the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model shall be included in the scope of the utility model. within the scope of protection.

Claims (5)

1. a kind of double-bus and single busbar mixing wiring high voltage distribution installation, which is characterized in that including：First busbar, the second mother Line, wire inlet unit, outgoing line unit and bus contact unit；

Wherein, the wire inlet unit includes main transformer and inlet wire link block；

The inlet wire link block is made of the breaker and disconnecting switch being sequentially connected in series, and has an end of incoming cables and two outlets End；

The outgoing line unit is connected including double female outlet modules, double female outlet link blocks, single mother's outlet module with single female outlet Module；

Double female outlet link blocks are made of the disconnecting switch and breaker being sequentially connected in series, and have two ends of incoming cables and one Leading-out terminal；

Single female outlet link block is made of the disconnecting switch and breaker being sequentially connected in series, and has one into electric end and one Leading-out terminal；

The bus contact unit is made of the network interconnecting circuit and disconnecting switch being sequentially connected in series；

The main transformer is connect with the end of incoming cables of inlet wire link block, and two leading-out terminals of inlet wire link block are respectively with first Busbar and the second busbar are connected；

Two ends of incoming cables of double female outlet link blocks are connected with the first busbar and the second busbar respectively, and double mother's outlets connect The leading-out terminal of connection module is connected with double female outlet modules；

The end of incoming cables of single female outlet link block is connected with the first busbar or the second busbar, single mother's outlet link block Leading-out terminal is connected with single female outlet module；

Bus contact unit one end is connected with the first busbar, and the other end is connected with the second busbar.

2. the apparatus according to claim 1, which is characterized in that double female outlet module numbers connect mould with double female outlets Number of blocks is at least one.

3. the apparatus according to claim 1, which is characterized in that single female outlet module number connects mould with single female outlet Number of blocks is at least one.

4. the apparatus according to claim 1, which is characterized in that the quantity of the wire inlet unit is at least one.

5. the apparatus according to claim 1, which is characterized in that the voltage class of first busbar and the second busbar is 35kV, 66kV, 110kV, 220kV, 330kV or 500kV.