CN103337903A

CN103337903A - Three-incoming-line and two-bus-coupler power supply system

Info

Publication number: CN103337903A
Application number: CN2013102993118A
Authority: CN
Inventors: 郭淑兰
Original assignee: State Grid Corp of China SGCC; Fuzhou Tianyu Electric Co Ltd
Current assignee: State Grid Corp of China SGCC; Fuzhou Tianyu Electric Co Ltd
Priority date: 2013-07-17
Filing date: 2013-07-17
Publication date: 2013-10-02

Abstract

The invention relates to a three-incoming-line and two-bus-coupler power supply system which is characterized by comprising a 1# transformer, a 2# transformer, a 1# bus coupler, a 2# bus coupler and an engine, wherein the 1# transformer is connected to a bus I section through a 1 QF breaker; the 1# bus coupler is connected between the bus I section and a bus II section through a 3 QF breaker; the 2# transformer is connected to the bus II section through a 2 QF breaker; the 2# bus coupler is connected between the bus II section and a bus III section through a 4 QF breaker; and the engine is connected to the bus III section through a 5 QF breaker. According to the three-incoming-line and two-bus-coupler power supply system, the power supply system can be well guaranteed to be safe and reliable, the structure is simple, and the cost is low.

Description

Three inlet wires, two female alliance electric systems

Technical field

The present invention relates to the power distribution field, especially a kind of three inlet wires, two female alliance electric systems.

Background technology

Present many power consumers require more and more higher to power supply continuity, so when the design power supply plan, except considering No. 2 transformer parallel powerings, last 1 tunnel standby generating power supply also in parallel, between 3 road electric power incoming lines, be provided with the contact loop, Here it is three inlet wires, two female alliance electric systems.Three inlet wires, two female alliance electric systems are compared with general two inlet wires, one female alliance electric system has certain superiority, and it can be by one main two being equipped with, two main one being equipped with or 3 main circuits multiple scheme such as power simultaneously satisfies higher power reguirements.

Summary of the invention

In view of this, the purpose of this invention is to provide a kind of three inlet wires, two female alliance electric systems.

The present invention adopts following scheme to realize: a kind of three inlet wires, two female alliance electric systems, it is characterized in that: comprise 1# transformer, 2# transformer, the female connection of 1#, the female connection of 2# and a generator, described 1# transformer is connected on the bus I section by the 1QF circuit breaker, the female UNICOM of described 1# crosses the 3QF circuit breaker and is connected between bus I section and the bus II section, described 2# transformer is connected on the bus II section by the 2QF circuit breaker, the female UNICOM of described 2# crosses the 4QF circuit breaker and is connected between bus II section and the bus III section, and described generator is connected on the bus III section by the 5QF circuit breaker.

In an embodiment of the present invention, the female connection of described 1# adopts 3QF circuit breaker interlock described 1QF circuit breaker, 2QF circuit breaker and 5QF circuit breaker.

In an embodiment of the present invention, described generator control loop adopts 5QF circuit breaker interlock described 1QF circuit breaker and 2QF circuit breaker.

In an embodiment of the present invention, when 1# transformer and 2# transformer fanout operation, 1# transformer belt bus I section, 2# transformer belt bus II section and bus III section; When the whole assembly of 1# transformer belt moves, 1# transformer belt bus I section, bus II section and bus III section; When the whole assembly of 2# transformer belt moves, 2# transformer belt bus I section, bus II section and bus III section; When 1# transformer and 2# transformer fault, 4QF and 5QF close a floodgate, and by generator belt bus II section and bus III section, are not with bus I section.

In an embodiment of the present invention, have only 1# transformer or arbitrary in 2# transformer to close and generator when disconnecting, the female connection of 1# just can close.

In an embodiment of the present invention, after arbitrary in 1# transformer or 2# transformer and mother 1# united, this moment, the female connection of 1# tripped at once if mistake is closed another transformer.

In an embodiment of the present invention, after generator closes, the tripping operation at once of the female connection of 1#.

In an embodiment of the present invention, only under the situation that 1# transformer and 2# transformer all disconnect, generator just can close.

In an embodiment of the present invention, behind the generator that closes, this moment, then generator tripped at once if mistake is closed 1# transformer or 2# transformer.

The present invention can guarantee preferably that electric power system is safe and reliable, and simple in structure, cost is low.

For making purpose of the present invention, technical scheme and advantage clearer, below will the present invention be described in further detail by specific embodiment and relevant drawings.

Description of drawings

Fig. 1 is system framework figure of the present invention.

Fig. 2 is the female connection of 1# of the present invention loop circuit figure.

Fig. 3 is generator loop circuit figure of the present invention.

Embodiment

As shown in Figure 1, present embodiment provides a kind of three inlet wires, two female alliance electric systems, comprise 1# transformer, 2# transformer, the female connection of 1#, the female connection of 2# and a generator, described 1# transformer is connected on the bus I section by the 1QF circuit breaker, the female UNICOM of described 1# crosses the 3QF circuit breaker and is connected between bus I section and the bus II section, described 2# transformer is connected on the bus II section by the 2QF circuit breaker, the female UNICOM of described 2# crosses the 4QF circuit breaker and is connected between bus II section and the bus III section, and described generator is connected on the bus III section by the 5QF circuit breaker.

As shown in Figure 2, the female connection of described 1# loop utilizes the power supply of auxiliary relay K switching 1# bus 3QF upper and lower side, then as the combined floodgate of described 1# bus 3QF, the control power supply of sub-gate circuit.Be connected to the closing circuit of 3QF after the normally-closed contact parallel connection of described 1# lead-in circuit breaker 1QF and 2# lead-in circuit breaker 2QF, when 1QF and 2QF closed a floodgate simultaneously, normally-closed contact was opened, and 3QF can not close; Be connected in parallel to the trip(ping) circuit of 3QF after the series connection of the normally opened contact of described 1# lead-in circuit breaker 1QF and 2# lead-in circuit breaker 2QF, when 1QF and 2QF closed a floodgate simultaneously, the normally opened contact 3QF circuit breaker that closes tripped at once; I section bus and II section bus paired running have been avoided.The normally opened contact of described generator circuit breaker 5QF is connected in parallel to the trip(ping) circuit of 3QF, when 5QF closes a floodgate, the normally opened contact closure, the 3QF circuit breaker when also tripping operation has at once avoided generator to start power supply deliver to I section bus.

As shown in Figure 3, the normally-closed contact of described 1# lead-in circuit breaker 1QF and 2# lead-in circuit breaker 2QF is connected serially to the closing circuit of 5QF, and when 1QF and 2QF closed a floodgate simultaneously, normally-closed contact was opened, and 5QF can not close; Be connected to the trip(ping) circuit of 5QF after the normally opened contact parallel connection of described 1# lead-in circuit breaker 1QF and 2# lead-in circuit breaker 2QF, when 1QF or 2QF combined floodgate, normally opened contact closes, and the 5QF circuit breaker trips at once; Generator power supply and civil power paired running have been avoided.

As Figure 1-3, under the normal condition, when 1# transformer and 2# transformer fanout operation, 1QF, 2QF and 4QF close a floodgate, 1# transformer belt bus I section, 2# transformer belt bus II section and bus III section; When the whole assembly of 1# transformer belt moved, 1QF, 3QF and 4QF closed a floodgate, 1# transformer belt bus I section, bus II section and bus III section; When the whole assembly of 2# transformer belt moved, 2QF, 3QF and 4QF closed a floodgate, 2# transformer belt bus I section, bus II section and bus III section.When 1# transformer and 2# transformer fault, 4QF and 5QF close a floodgate, and by generator belt bus II section and bus III section, are not with bus I section.

Need to prove: have only 1# transformer or arbitrary in 2# transformer to close and generator when disconnecting, the female connection of 1# just can close; After arbitrary in 1# transformer or 2# transformer and mother 1# united, this moment, the female connection of 1# tripped at once if mistake is closed another transformer; After generator closes, the tripping operation at once of the female connection of 1#; Only under the situation that 1# transformer and 2# transformer all disconnect, generator just can close; Behind the generator that closes, this moment, then generator tripped at once if mistake is closed 1# transformer or 2# transformer.

Above-listed preferred embodiment; the purpose, technical solutions and advantages of the present invention are further described; institute is understood that; the above only is preferred embodiment of the present invention; not in order to limit the present invention; within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. inlet wire two female alliance electric systems, it is characterized in that: comprise 1# transformer, 2# transformer, the female connection of 1#, the female connection of 2# and a generator, described 1# transformer is connected on the bus I section by the 1QF circuit breaker, the female UNICOM of described 1# crosses the 3QF circuit breaker and is connected between bus I section and the bus II section, described 2# transformer is connected on the bus II section by the 2QF circuit breaker, the female UNICOM of described 2# crosses the 4QF circuit breaker and is connected between bus II section and the bus III section, and described generator is connected on the bus III section by the 5QF circuit breaker.

2. three inlet wires, two female alliance electric systems according to claim 1 is characterized in that: the female connection of described 1# adopts 3QF circuit breaker interlock described 1QF circuit breaker, 2QF circuit breaker and 5QF circuit breaker.

3. three inlet wires, two female alliance electric systems according to claim 1 is characterized in that: described generator control loop adopts 5QF circuit breaker interlock described 1QF circuit breaker and 2QF circuit breaker.

4. three inlet wires, two female alliance electric systems according to claim 1 is characterized in that: when 1# transformer and 2# transformer fanout operation, and 1# transformer belt bus I section, 2# transformer belt bus II section and bus III section; When the whole assembly of 1# transformer belt moves, 1# transformer belt bus I section, bus II section and bus III section; When the whole assembly of 2# transformer belt moves, 2# transformer belt bus I section, bus II section and bus III section; When 1# transformer and 2# transformer fault, 4QF and 5QF close a floodgate, and by generator belt bus II section and bus III section, are not with bus I section.

5. three inlet wires, two female alliance electric systems according to claim 1 is characterized in that: have only 1# transformer or arbitrary in 2# transformer to close and generator when disconnecting, the female connection of 1# just can close.

6. three inlet wires, two female alliance electric systems according to claim 1 is characterized in that: after 1# transformer or arbitrary in 2# transformer and mother 1# united, this moment, the female connection of 1# tripped at once if mistake is closed another transformer.

7. three inlet wires, two female alliance electric systems according to claim 1 is characterized in that: after generator closes, and the tripping operation at once of the female connection of 1#.

8. three inlet wires, two female alliance electric systems according to claim 1 is characterized in that: only under the situation that 1# transformer and 2# transformer all disconnect, generator just can close.

9. three inlet wires, two female alliance electric systems according to claim 1 is characterized in that: behind the generator that closes, this moment, then generator tripped at once if mistake is closed 1# transformer or 2# transformer.