CN219420366U

CN219420366U - Primary load power supply system

Info

Publication number: CN219420366U
Application number: CN202320593562.6U
Authority: CN
Inventors: 陈永峰; 丁丽婷; 施婉春; 倪良华
Original assignee: Jiangsu Jiatong Energy Co ltd
Current assignee: Jiangsu Jiatong Energy Co ltd
Priority date: 2023-03-23
Filing date: 2023-03-23
Publication date: 2023-07-25
Anticipated expiration: 2033-03-23

Abstract

The application discloses one-level load power supply system, this one-level load power supply system includes: a first bus electrically connected to a plurality of first utility loads and a plurality of first emergency loads; a second bus electrically connected to a plurality of second utility loads and a plurality of second emergency loads; a mains supply supplying said first bus and said second bus; the emergency power supply is electrically connected with the second bus, and an outgoing line breaker is arranged between the emergency power supply and the second bus; and the commercial power bus-bar switch is arranged between the first bus and the second bus, a plurality of first emergency loads and a plurality of second emergency loads are in one-to-one correspondence, and the first emergency loads and the second emergency loads are mutually standby. At least one of the first emergency load and the second emergency load can work normally, and reliability and stability are improved.

Description

Primary load power supply system

Technical Field

The utility model relates to the field of power supply, in particular to the field of power supply systems, and particularly relates to a primary load power supply system.

Background

In a power supply system, according to different power supply reliability requirement levels, a primary load is greatly influenced by interrupting a power supply, and two different power supplies are needed to be adopted. The two paths of power supplies are generally powered by a commercial power and an emergency diesel generator, the emergency diesel generator is used as a standby power supply, and a section of emergency load is specially arranged; under normal conditions, the emergency section is powered by mains supply, and if the mains supply fails, the emergency diesel generator is started and is loaded by the emergency section.

The existing primary load power supply mode meets the use requirement, but the emergency load is set more intensively, so that the two-section load distribution of the mains supply is very uneven; and under normal conditions, if the bus of the emergency section fails, the whole emergency load is completely powered off, so that serious accidents are caused.

Disclosure of Invention

In view of the above-described drawbacks or shortcomings in the prior art, it is desirable to provide a primary load power supply system with uniform load distribution and high reliability.

In a first aspect, the primary load power supply system of the present utility model includes:

a first bus electrically connected to a plurality of first utility loads and a plurality of first emergency loads;

a second bus electrically connected to a plurality of second utility loads and a plurality of second emergency loads;

a mains supply supplying said first bus and said second bus;

the emergency power supply is electrically connected with the second bus, and an outgoing line breaker is arranged between the emergency power supply and the second bus; and

the commercial power bus-bar switch is arranged between the first bus bar and the second bus bar,

the first emergency loads and the second emergency loads are in one-to-one correspondence, and the first emergency loads and the second emergency loads are standby.

According to the technical scheme provided by the embodiment of the application, a plurality of first emergency loads are electrically connected to the first bus, a plurality of second emergency loads are electrically connected to the second bus, and the first emergency loads and the second emergency loads are mutually standby, so that the first emergency loads and the second emergency loads can be uniformly distributed, when the mains supply cannot supply power, the mains supply bus-connected switch is closed, the first bus is electrically connected with the second bus, the emergency power supply can supply power for the first emergency loads and the second emergency loads respectively, when any one of the first bus and the second bus fails, the emergency power supply can still supply power for the other one of the first bus and the second bus, at least one of the first emergency loads and the second emergency loads can work normally, and reliability and stability are improved.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings, in which:

fig. 1 is a schematic structural diagram of a primary load power supply system according to an embodiment of the present utility model.

Detailed Description

The present application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the utility model are shown in the drawings.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1, the primary load power supply system of the present utility model includes: a first bus 100 to which a plurality of first utility loads 110 and a plurality of first emergency loads 120 are electrically connected; a second bus 200 to which a plurality of second utility loads 210 and a plurality of second emergency loads 220 are electrically connected; a mains supply 300 which supplies power to the first bus 100 and the second bus 300; an emergency power supply 400 electrically connected to the second bus bar 200, and an outgoing circuit breaker 410 provided between the emergency power supply 400 and the second bus bar 200; and a commercial power bus-bar switch 500 disposed between the first bus 100 and the second bus 200, wherein the first emergency loads 120 and the second emergency loads 220 are in one-to-one correspondence, and the first emergency loads 120 and the second emergency loads 220 are standby.

In an embodiment of the utility model, the mains supply supplies a plurality of first mains loads and a plurality of first emergency loads via a first bus, and the mains supply supplies a plurality of second mains loads and a plurality of second emergency loads via a second bus. When the mains supply can not supply power, the outgoing line breaker and the mains supply bus-bar switch are closed, the first bus and the second bus are electrically connected, the emergency power supply can supply power for the first bus and the second bus, normal operation of a plurality of first emergency loads electrically connected to the first bus and a plurality of second emergency loads electrically connected to the second bus is guaranteed, and influence of the mains supply incapable of supplying power is reduced. The first emergency loads are electrically connected with the first bus, and the second emergency loads are electrically connected with the second bus, so that the first emergency loads and the second emergency loads can be uniformly distributed, and the condition that a single bus is overloaded is avoided. The first emergency loads and the second emergency loads are standby, when the mains supply cannot supply power, the mains supply bus-bar switch is closed, the first bus is electrically connected with the second bus, the emergency power supply can supply power for the first emergency loads and the second emergency loads respectively, when any one of the first bus and the second bus fails, the emergency power supply can still supply power for the other one of the first bus and the second bus, at least one of the first emergency load and the second emergency load can work normally, and reliability and stability are improved.

Further, the mains supply 300 is electrically connected to a third bus 600, the third bus 600 being a 10kV bus.

In the embodiment of the utility model, the third bus is a 10kV bus, and the power supply carries out high-voltage transmission, so that the power loss can be reduced.

Further, the third bus 600 is electrically connected to the first bus 100 through a first electric wire 610, and the first electric wire 610 is sequentially provided with a first transformer incoming line breaker 611, a first transformer 612 and a first mains incoming line breaker 613.

In an embodiment of the utility model, the first transformer is capable of converting a high voltage of 10kV into a low voltage for normal operation of the first mains load and the first emergency load. When the mains supply is not powered, the first transformer incoming line breaker and the first mains supply incoming line breaker are disconnected, and the first transformer, the first mains supply load and the first emergency load are protected.

Further, the first transformer 612 is a 10/0.4kV transformer.

In the embodiment of the utility model, the first transformer is a 10/0.4kV transformer, and can convert 10kV high voltage into 400V low voltage for the first commercial power load and the first emergency load to work normally.

Further, the third bus bar 600 is electrically connected to the second bus bar 200 through a second wire 620, and the second wire 620 is provided with a second transformer incoming line breaker 621, a second transformer 622, and a second commercial power incoming line breaker 623 in sequence.

In an embodiment of the utility model, the second transformer is capable of converting a high voltage of 10kV into a low voltage for normal operation of the second utility load and the second emergency load. When the mains supply is not powered, the second transformer incoming line breaker and the second mains supply incoming line breaker are disconnected, and the second transformer, the second mains supply load and the second emergency load are protected.

Further, the second transformer 622 is a 10/0.4kV transformer.

In the embodiment of the utility model, the second transformer is a 10/0.4kV transformer, and can convert 10kV high voltage into 400V low voltage for the second commercial power load and the second emergency load to work normally.

Further, the emergency power supply 400 is a diesel generator.

In the embodiment of the utility model, the emergency power supply is a diesel generator, and the diesel generator has the advantages of wide unit power range, compact structure of matched equipment, flexible installation place, high heat efficiency, low fuel consumption and the like.

Further, the plurality of first utility loads 110 are electrically connected to the first bus 100 through the first circuit breakers 111, respectively, and the plurality of first emergency loads 120 are electrically connected to the first bus 100 through the second circuit breakers 121, respectively.

In an embodiment of the utility model, the first circuit breaker is opened when the mains supply is not supplied, avoiding the use of an emergency power supply for supplying power to the first mains load. When the mains supply is not supplied, the second circuit breaker will be closed, ensuring that the emergency supply supplies power to the first emergency load.

Further, the plurality of second utility loads 210 are electrically connected to the second bus bar 200 through third circuit breakers 211, respectively, and the plurality of second emergency loads 220 are electrically connected to the second bus bar 200 through fourth circuit breakers 221, respectively.

In an embodiment of the utility model, the third circuit breaker is opened when the mains supply is not supplied, avoiding the use of an emergency power supply for supplying the second mains load. When the mains supply is not supplying power, the fourth circuit breaker will be closed, ensuring that the emergency supply supplies power to the second emergency load.

The foregoing description is only of the preferred embodiments of the present application and is presented as a description of the principles of the technology being utilized. It will be appreciated by persons skilled in the art that the scope of the utility model referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the utility model. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.

Claims

1. A primary load power supply system, comprising:

a mains supply supplying said first bus and said second bus;

2. The primary load power supply system of claim 1, wherein the mains supply is electrically connected to a third bus, the third bus being a 10kV bus.

3. The primary load power supply system of claim 2, wherein the third bus is electrically connected to the first bus via a first wire, and the first wire is provided with a first transformer incoming circuit breaker, a first transformer, and a first mains incoming circuit breaker in sequence.

4. A primary load power supply system according to claim 3, wherein the first transformer is a 10/0.4kV transformer.

5. The primary load power supply system according to claim 2, wherein the third bus is electrically connected to the second bus through a second wire, and the second wire is provided with a second transformer incoming circuit breaker, a second transformer and a second mains incoming circuit breaker in sequence.

6. The primary load power supply system of claim 5, wherein the second transformer is a 10/0.4kV transformer.

7. The primary load power supply system of claim 1, wherein the emergency power source is a diesel generator.

8. The primary load power supply system of claim 1, wherein a plurality of the first utility loads are electrically connected to the first bus bar through first circuit breakers, respectively, and a plurality of the first emergency loads are electrically connected to the first bus bar through second circuit breakers, respectively.

9. The primary load power supply system of claim 1, wherein a plurality of the second utility loads are electrically connected to the second bus bar through third circuit breakers, respectively, and a plurality of the second emergency loads are electrically connected to the second bus bar through fourth circuit breakers, respectively.