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

Abstract

The present invention relates to a power supply system with three incoming lines and two bus couplings, which is characterized in that it includes 1# transformer, 2# transformer, 1# bus coupling, 2# bus coupling and a generator, and the 1# transformer passes through a 1QF circuit breaker Connected to bus section I, the 1# bus coupler is connected between bus section I and bus section II through a 3QF circuit breaker, the 2# transformer is connected to bus section II through a 2QF circuit breaker, and the 2# bus The generator is connected between the bus section II and the bus section III through a 4QF circuit breaker, and the generator is connected to the bus section III through a 5QF circuit breaker. The invention can better ensure the safety and reliability of the power supply system, and has simple structure and low cost.

Description

Three incoming lines and two bus tie power supply system

technical field

The invention relates to the field of power distribution, in particular to a power supply system with three incoming lines and two bus-connections.

Background technique

Nowadays, many power users have higher and higher requirements for the continuity of power supply. Therefore, when designing the power supply scheme, in addition to considering the parallel power supply of two transformers, a backup power supply is also connected in parallel, and there is a connection between the three power supply lines. This is the power supply system with three incoming lines and two bus tie. The power supply system with three incoming lines and two bus connections has certain advantages compared with the general two incoming lines and one bus connection power supply system. Meet high power requirements.

Contents of the invention

In view of this, the object of the present invention is to provide a power supply system with three incoming lines and two bus tie.

The present invention adopts the following scheme to realize: a power supply system with three incoming lines and two bus-couplers, characterized in that it includes 1# transformer, 2# transformer, 1# bus-coupler, 2# bus-coupler and a generator, the 1# transformer The 1# bus coupler is connected between the bus section I and the bus section II through a 3QF circuit breaker, and the 2# transformer is connected to the bus section II through a 2QF circuit breaker. The 2# bus coupler is connected between bus section II and bus section III through a 4QF circuit breaker, and the generator is connected to bus section III through a 5QF circuit breaker.

In an embodiment of the present invention, the 1# bus coupler uses a 3QF circuit breaker to interlock the 1QF circuit breaker, the 2QF circuit breaker and the 5QF circuit breaker.

In an embodiment of the present invention, the generator control circuit uses a 5QF circuit breaker to interlock the 1QF circuit breaker and the 2QF circuit breaker.

In one embodiment of the present invention, when the 1# transformer and the 2# transformer operate separately, the 1# transformer is equipped with the bus section I, and the 2# transformer is equipped with the bus section II and the bus section III; , 1# transformer is equipped with bus section I, bus section II and bus section III; when 2# transformer is equipped with integrated operation, 2# transformer is equipped with bus section I, bus section II and bus section III; when 1# transformer and 2# When the transformer fails, 4QF and 5QF are closed, and the generator is equipped with bus section II and bus section III, without bus section I.

In one embodiment of the present invention, only when either 1# transformer or 2# transformer is turned on and the generator is disconnected, can the 1# bus coupler be turned on.

In one embodiment of the present invention, when either 1# transformer or 2# transformer is connected to 1# bus connection, if another transformer is mistakenly connected at this time, 1# bus connection will trip immediately.

In one embodiment of the present invention, after the generator is turned on, the 1# bus tie trips immediately.

In an embodiment of the present invention, the generator can be switched on only when both the 1# transformer and the 2# transformer are disconnected.

In one embodiment of the present invention, when the generator is turned on, if the 1# transformer or the 2# transformer is mistakenly turned on, the generator will trip immediately.

The invention can better ensure the safety and reliability of the power supply system, and has simple structure and low cost.

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through specific embodiments and related drawings.

Description of drawings

Fig. 1 is a system frame diagram of the present invention.

Fig. 2 is the circuit diagram of the 1# bus tie circuit of the present invention.

Fig. 3 is a circuit diagram of the generator circuit of the present invention.

Detailed ways

As shown in Figure 1, this embodiment provides a power supply system with three incoming lines and two bus-tie, including 1# transformer, 2# transformer, 1# bus-tie, 2# bus-tie and a generator. The 1# transformer passes The 1QF circuit breaker is connected to bus section I, the 1# bus coupler is connected between bus section I and bus section II through a 3QF circuit breaker, and the 2# transformer is connected to bus section II through a 2QF circuit breaker. The 2# bus coupler is connected between bus section II and bus section III through a 4QF circuit breaker, and the generator is connected to bus section III through a 5QF circuit breaker.

As shown in Figure 2, the 1# bus-tie circuit uses an intermediate relay K to switch the power supply at the upper and lower ends of the 1# bus-tie circuit breaker 3QF, and then serves as the closing and opening circuit of the 1# bus-tie circuit breaker 3QF Control power. The normally closed contacts of 1# incoming line circuit breaker 1QF and 2# incoming line circuit breaker 2QF are connected in parallel and then connected to the closing circuit of 3QF. When 1QF and 2QF are closed at the same time, the normally closed contacts are opened and 3QF cannot be closed. Above; the normally open contacts of 1# incoming line circuit breaker 1QF and 2# incoming line circuit breaker 2QF are connected in series and connected in parallel to the tripping circuit of 3QF. The device trips immediately; avoiding the parallel operation of the I-section bus and the II-section bus. The normally open contact of described generator circuit breaker 5QF is connected in parallel to the trip circuit of 3QF, and when 5QF was switched on, the normally open contact was closed, and 3QF circuit breaker also tripped at once to avoid the power supply to the I section bus when the generator was started.

As shown in Figure 3, the normally closed contacts of the 1# incoming line circuit breaker 1QF and the 2# incoming line circuit breaker 2QF are connected in series to the closing circuit of 5QF. When 1QF and 2QF are closed at the same time, the normally closed contacts are opened , 5QF cannot be closed; the normally open contacts of 1# incoming line circuit breaker 1QF and 2# incoming line circuit breaker 2QF are connected in parallel and then connected to the tripping circuit of 5QF. When 1QF or 2QF is closed, the normally open contacts are closed On, the 5QF circuit breaker trips immediately; avoiding parallel operation of generator power and mains power.

As shown in Figure 1-3, under normal circumstances, when 1# transformer and 2# transformer operate separately, 1QF, 2QF and 4QF are closed, 1# transformer is equipped with bus section I, and 2# transformer is equipped with bus section II and the busbar Section III; when 1# transformer operates with integrated operation, 1QF, 3QF and 4QF close, 1# transformer operates with bus section I, bus section II and bus section III; when 2# transformer operates with integrated operation, 2QF, 3QF and 4QF closed, 2# transformer with bus section I, bus section II and bus section III. When the 1# transformer and the 2# transformer fail, 4QF and 5QF are switched on, and the generator is equipped with bus section II and bus section III, without bus section I.

It should be noted that only when either 1# transformer or 2# transformer is turned on and the generator is disconnected, 1# bus connection can be turned on; when either 1# transformer or 2# transformer is connected to 1# bus connection Finally, if another transformer is mistakenly connected at this time, the 1# bus coupler will trip immediately; after the generator is turned on, the 1# bus coupler will trip immediately; only when both 1# transformer and 2# transformer are disconnected, the generator When the generator is turned on, if the 1# transformer or 2# transformer is mistakenly turned on at this time, the generator will trip immediately.

The above-listed preferred embodiments have further described the purpose, technical solutions and advantages of the present invention in detail. It should be understood that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Within the spirit and principles of the present invention, any modifications, equivalent replacements, improvements, etc., shall be included within the protection scope of the present invention.

Claims (9)

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.

Images