CN206894349U - Generator self-starting control circuit and power distribution device - Google Patents

Abstract

The utility model provides a generator self-starting control circuit and a power distribution device. The generator self-starting control circuit is connected with a generator assembly, and the generator assembly includes a trigger circuit for connecting a generator start signal. The generator self-starting control circuit includes a dual power switch, the power output end of the motor assembly is connected to the first input end of the dual power switch, and the second input end of the dual power switch is connected to the mains bus , the output end of the dual power supply switch is connected to the emergency bus that needs constant power supply, the mains bus is connected to the power supply device through a controllable switch, and the trigger circuit is provided with a switch that maintains the opposite state of the controllable switch. Trigger the switch. When the power supply of the two mains power supply fails, the generator is started to supply power. Solve the problem of reasonably triggering the self-starting of the generator when the power supply fails in the power supply system of double busbars (with one generator set).

Description

Generator self-starting control circuit and power distribution device

technical field

The utility model relates to a power distribution device, in particular to a generator self-starting control circuit and a power distribution device.

Background technique

At present, in many power supply and distribution schemes, in addition to two mains power supplies for important power loads, an emergency power supply of a generator set is also configured. In the current generator control scheme, the generator is started manually after a power failure, which has the problems of low power supply reliability and low time efficiency.

Utility model content

The purpose of the utility model is to provide a generator self-starting control circuit and power distribution device, aiming to solve the problems of low power supply reliability and low time efficiency when the generator is started manually after a power failure.

The utility model provides a generator self-starting control circuit, which is connected with a generator component. The generator component includes a trigger circuit for connecting a generator starting signal. The generator self-starting control circuit includes a dual power supply switching switch, the power output end of the motor assembly is connected to the first input end of the dual power switch, the second input end of the dual power switch is connected to the mains bus, and the output end of the dual power switch It is connected to the emergency bus bar that needs constant power supply, and the mains bus bar is connected to the power supply device through a controllable switch. The trigger circuit is provided with a trigger switch whose state is opposite to that of the controllable switch.

Preferably, the controllable switch includes a normally open contact of a first incoming circuit breaker and a normally open contact of a second incoming circuit breaker, the mains bus includes a first bus and a second bus, and the power supply The apparatus includes a first transformer and a second transformer;

The first busbar is connected to the second busbar through a normally open contact of a tie circuit breaker, the first busbar is connected to the first transformer through a normally open contact of the first incoming circuit breaker, and the The second bus bar is connected to the second transformer through the normally open contact of the second incoming circuit breaker.

Preferably, the trigger switch includes a normally closed contact of the first incoming circuit breaker and a normally closed contact of the second incoming circuit breaker.

Preferably, each of the first incoming circuit breaker, the second incoming circuit breaker and the tie circuit breaker has one closing lock, and the three closing locks include two matched keys.

Specifically, the first incoming circuit breaker, the second incoming circuit breaker and the tie circuit breaker are delay closing relays.

The utility model also provides a power distribution device, which includes a generator assembly, the generator assembly includes a trigger circuit for connecting a generator start signal, and also includes the above-mentioned generator self-start control circuit.

When one of the mains power supply of the above-mentioned generator self-starting control circuit fails, the contact cabinet is closed, and the other normal mains power supply is sent to the faulty power supply side through the contact cabinet. When the power supply of the two mains power supply fails, the generator is started to supply power. Solve the problem of reasonably triggering the self-starting of the generator when the power supply fails in the power supply system of double busbars (with one generator set).

Description of drawings

Fig. 1 is the schematic diagram of the principle of the self-starting control circuit of the generator in the preferred embodiment of the utility model;

Fig. 2A is the electrical schematic diagram of the generator self-starting control circuit in a preferred embodiment of the present invention;

FIG. 2B is a schematic diagram of the principle of the trigger circuit in the generator self-starting control circuit shown in FIG. 1 .

detailed description

In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Please refer to Fig. 1, 2A and 2B, in the preferred embodiment of the utility model, the generator self-start control circuit is connected with the generator assembly 10, and the generator assembly 10 includes a trigger circuit 11 for connecting the generator start signal. Wherein, the trigger circuit 11 has two ports FQ1 and FQ5, which are connected to the transmission back of the starting signal of the generator, please refer to FIG. 2B .

The generator self-starting control circuit includes a dual power supply switch 20, the power output terminal of the generator assembly 10 is connected to the first input terminal of the dual power supply switch 20, and the second input terminal of the dual power supply switch 20 is connected to the mains bus 30 , the output end of the dual power switch 20 is connected to the emergency bus 40 that needs constant power supply, the mains bus 30 is connected to the power supply device 60 through the controllable switch 51, and the trigger circuit 11 is provided with a trigger that is opposite to the state of the controllable switch 51. Switch 52.

It should be noted that the important loads on the emergency bus 40 in this embodiment require constant power supply; the loads on the mains bus 30 are generally loads that do not need power supply. The dual power switch 20 can detect the power state on the mains bus 30. When the mains 30 supplies power normally, the output of the dual power switch 20 is connected to the second input, and the mains 30 supplies power to the emergency bus 40. When the mains bus 30 fails, the output terminal of the dual power switch 20 is connected to the first input terminal, and the generator assembly 10 supplies power to the emergency bus 40 .

Please refer to Fig. 2A, the controllable switch 51 includes the normally open contact 511 of the first incoming line circuit breaker 1QF and the normally open contact 512 of the second incoming line circuit breaker 2QF, the mains bus 30 includes the first bus 31 and the second The bus bar 32 and the power supply device 60 include a first transformer 61 and a second transformer 62 .

The first bus bar 31 and the second bus bar 32 are connected through a normally open contact 511 of a tie circuit breaker 3QF, the first bus bar 31 is connected with the first transformer 61 through a normally open contact 511 of the first incoming circuit breaker 1QF, and the second The bus bar 32 is connected to the second transformer 62 through the normally open contact 512 of the second incoming circuit breaker 2QF.

Referring to FIG. 2B , the trigger switch 52 includes a normally closed contact 521 of the first incoming circuit breaker 1QF and a normally closed contact 522 of the second incoming circuit breaker 2QF.

The first incoming circuit breaker 1QF, the second incoming circuit breaker 2QF and the tie circuit breaker 3QF each have a closing lock, and the three closing locks include two matching keys. The first incoming circuit breaker 1QF, the second incoming circuit breaker 2QF and the tie circuit breaker 3QF are delay closing relays.

A power distribution device is also provided, including a generator assembly 10, the generator assembly 10 includes a trigger circuit 11 for connecting a generator start signal, and also includes the above-mentioned generator self-start control circuit.

This power supply scheme includes two incoming lines and one connection, three circuit breakers 1QF/2QF/3QF, each of the three circuit breakers 1QF/2QF/3QF is equipped with a closing lock, and the three locks have only two keys. The circuit breaker is only allowed to close when the key is inserted into the circuit breaker closing lock. Ensure that two incoming lines and one contact three circuit breakers 1QF/2QF/3QF have at most two closed switches to prevent the two transformers 61 and 62 from being short-circuited. At the same time, the system also has a mains-generation dual power supply conversion cabinet, the mains incoming line side of the dual power supply switch 20 is connected to the mains bus (the second bus 32 of the mains bus 30), and the dual power supply switch 20 is connected to the mains incoming line side. The generator set is connected, and the outlet side of the dual power switch 20 is connected to the emergency bus section (ie, the emergency bus 40).

The first incoming line circuit breaker 1QF in 1# incoming line cabinet and the second incoming line circuit breaker 2QF in 2# incoming line cabinet are equipped with time-delay voltage loss coils. When the power supply at the incoming line end of 1# incoming line cabinet fails, 1QF delay Automatic tripping; when the power supply at the incoming line end of the 2# incoming line cabinet fails, the 2QF delays automatic tripping, and the delay time can be set according to actual needs.

Specific power delivery sequence:

1. When the power supply of the two power sources (the first transformer 61 and the second transformer 62) is normal, the first incoming line circuit breaker 1QF of the 1# incoming line cabinet and the second incoming line circuit breaker 2QF of the 2# incoming line cabinet are closed , and at the same time, the dual power supply switching switch 20 is switched to the first input end and the output end are switched on and closed. At this time, the first bus 31 is powered by the first transformer 61 ; the second bus 32 is powered by the second transformer 62 , and the emergency bus 40 is also powered by the second transformer 62 .

2. When the power supply of the first transformer 61 fails, the first incoming line circuit breaker 1QF of the 1# incoming line cabinet automatically delays tripping. At this time, close the 3QF circuit breaker of the connection cabinet, and at the same time, the dual power supply switch 20 is switched to the first input terminal. And the output terminal is turned on and closed. At this time, the first bus 31 is powered by the second transformer 62 ; the second bus 32 is powered by the second transformer 62 , and the emergency bus section is also powered by the second transformer 62 .

3. When the power supply of the second transformer 62 fails, the second incoming line circuit breaker 2QF of the 2# incoming line cabinet will trip automatically with a delay. and output closed. At this time, the first bus 31 is powered by the first transformer 61 ; the second bus 32 is powered by the first transformer 61 , and the emergency bus section is also powered by the first transformer 61 .

4. When both the first transformer 61 and the second transformer 62 fail to supply power, the first incoming circuit breaker 1QF of 1# incoming line cabinet will automatically delay tripping, and the second incoming line circuit breaker 2QF of 2# incoming line cabinet will also automatically delay trip. At this time, the 1QF and 2QF normally closed auxiliary contacts connected in series on the trigger line 11 are closed, that is, the connection between F01 and F05 is conducted. At this time, a generator start signal is sent to the generator control panel to drive the generator to start, and at the same time, the dual power supply switches 20 is switched to the power generation inlet end and the switch is closed, and the emergency bus section is powered by the generator. Thus, the self-starting control of the generator can be well realized.

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model should be included in the utility model. within the scope of protection.

Claims (6)

1. A generator self-starting control circuit, connected to a generator assembly, the generator assembly including a trigger circuit for accessing a generator starting signal, characterized in that the generator self-starting control circuit includes a dual power supply A switch, the power output end of the motor assembly is connected to the first input end of the dual power switch, the second input end of the dual power switch is connected to the mains bus, and the output of the dual power switch is The mains bus is connected to the power supply device through a controllable switch, and the trigger circuit is provided with a trigger switch that keeps the state of the controllable switch opposite to that of the controllable switch. 2. The generator self-starting control circuit according to claim 1, wherein the controllable switch comprises a normally open contact of the first incoming circuit breaker and a normally open contact of the second incoming circuit breaker, The mains bus includes a first bus and a second bus, and the power supply device includes a first transformer and a second transformer; The first busbar is connected to the second busbar through a normally open contact of a tie circuit breaker, the first busbar is connected to the first transformer through a normally open contact of the first incoming circuit breaker, and the The second bus bar is connected to the second transformer through the normally open contact of the second incoming circuit breaker. 3. The generator self-starting control circuit according to claim 2, wherein the trigger switch comprises a normally closed contact of the first incoming circuit breaker and a normally closed contact of the second incoming circuit breaker . 4. The generator self-starting control circuit as claimed in claim 2, characterized in that, each of the first incoming circuit breaker, the second incoming circuit breaker and the tie circuit breaker has a closing lock, and three The closing lock described above includes two matching keys. 5. The generator self-starting control circuit according to claim 2, characterized in that, the first incoming line circuit breaker, the second incoming line circuit breaker and the tie circuit breaker are delay closing relays. 6. A power distribution device, comprising a generator assembly, characterized in that the generator assembly includes a trigger circuit for accessing a generator start signal, and further includes the generator according to any one of claims 1 to 5 Self-starting control circuit.