CN209434894U

CN209434894U - A kind of generator automatic Synchronization control circuit

Info

Publication number: CN209434894U
Application number: CN201920405888.5U
Authority: CN
Inventors: 曾惠敏
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-28
Filing date: 2019-03-28
Publication date: 2019-09-24
Anticipated expiration: 2029-03-28

Abstract

The utility model discloses a kind of generator automatic Synchronization control circuits, including the control circuit with automatic Synchronization control sequential and using DC relay as the holding circuit of core；Pass through three groups of moving together contact connection of A.C. contactor in control circuit between three phase network and generator G；Assist control point of the holding circuit as control circuit；Control circuit is electrically connected with three phase network, generator G, holding circuit respectively；The utility model realizes the automatic Synchronization process of generator and power grid by three groups of normally opened contacts of A.C. contactor in control circuit under the premise of three-phase AC grid phase sequence is correct, is not necessarily to manual hand manipulation, convenient and efficient；Circuit structure is simplified, and used component number is few, is easily installed production.

Description

A kind of generator automatic Synchronization control circuit

Technical field

The utility model relates to arrive generator parallel operation technical field more particularly to a kind of generator automatic Synchronization control Circuit processed.

Background technique

There are two ways to generator parallel operation, it may be assumed that quasi-synchronization paralleling method and automatic self synchronizing apposition are widely used at present Quasi-synchronization paralleling method.Quasi-synchronization paralleling method be divided into it is manual, semi-automatic and three kinds automatic, mostly use greatly at present it is manual or it is semi-automatic this Two kinds of operating methods.

But both operating methods, which require manual hand manipulation, intervenes, and it is time-consuming and laborious, it is very inconvenient, because This, the prior art is defective, needs to improve.

Utility model content

The utility model provides a kind of generator automatic Synchronization control circuit, the above problem of solution.

To solve the above problems, the technical scheme that the utility model is provided is as follows:

A kind of generator automatic Synchronization control circuit, including the control circuit with automatic Synchronization control sequential and with direct current Relay is the holding circuit of core；It is dynamic by three groups of A.C. contactor in control circuit between three phase network and generator G Conjunction contact connection；Assist control point of the holding circuit as control circuit；Control circuit respectively with three phase network, generator G, Holding circuit is electrically connected.

Beneficial effect compared with the existing technology is that using the above scheme, the utility model is in three-phase AC grid phase sequence Under the premise of correctly, the automatic Synchronization of generator and power grid is realized by three groups of normally opened contacts of A.C. contactor in control circuit Process is not necessarily to manual hand manipulation, convenient and efficient；Circuit structure is simplified, and used component number is few, is easily installed production.

Detailed description of the invention

Illustrate embodiment or technical solution in the prior art in order to clearer, it below will be to embodiment or the prior art The required attached drawing used is briefly described in description, it is clear that, the accompanying drawings in the following description is only the one of utility model A little embodiments for those of ordinary skill in the art without creative efforts, can also be according to these Attached drawing obtains other attached drawings.

Fig. 1 is a kind of circuit diagram of generator automatic Synchronization control circuit of the utility model.

Specific embodiment

For the ease of understanding the utility model, in the following with reference to the drawings and specific embodiments, the utility model is carried out more detailed Thin explanation.The preferred embodiment of the utility model is given in attached drawing.But the utility model can be with many different Form is realized, however it is not limited to this specification described embodiment.On the contrary, purpose of providing these embodiments is makes to this The understanding of the disclosure of utility model is more thorough and comprehensive.

It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to To another element or it may be simultaneously present centering elements.Term used in this specification " fixation ", " integrated molding ", For illustrative purposes only, the similar unit of structure is to identical label in the figure for "left", "right" and similar statement Mark.

Unless otherwise defined, technical and scientific term all used in this specification and the skill for belonging to the utility model The normally understood meaning of the technical staff in art field is identical.Art used in the description of the utility model in this specification Language, which is only for the purpose of describing specific embodiments, is not intended to limitation the utility model.

As shown in Figure 1, one embodiment of the utility model is:

Control circuit include fuse FU1-FU3, button SB1-SB2, contactor KM1-KM2, time relay KT and from Move instrument ZTQ arranged side by side；

The C phase of three-phase AC grid is connect with the first end of fuse FU1；The second end of fuse FU1 respectively with contact The second end of the second end of the normally opened contact KM1-2 of device KM1, the second end of contactor KM2 and its normally-closed contact connects；Three intersections The A phase of galvanic electricity net is connect with the first end of fuse FU2；The second end of fuse FU2 and the normally-closed contact KM1- of contactor KM1 5 first end connection；The second end of the normally-closed contact KM1-5 of contactor KM1 is connect with the 1st pin of automatic Synchronization instrument ZTQ；Hair The A phase of motor G is connect with the first end of fuse FU3；The second end of the fuse FU3 normally-closed contact with contactor KM1 respectively The first end of KM1-4, the first end of button SB1, the second end of the first end of time relay KT and its normally opened contact KT-1, after The second end of the normally opened contact K-1 of electric appliance K and its first end connection of normally opened contact K-2；The normally opened contact of time relay KT The first end of KT-1 is connect with the first end of the normally opened contact K-1 of relay K；The second end of button SB1 is respectively with button SB2's The 5th pin connection of first end, the first end of the normally opened contact KM1-3 of contactor KM1, automatic Synchronization instrument ZTQ；Contactor KM1 First end respectively with the second end of button SB2, the second end of the normally opened contact KM1-3 of contactor KM1, automatic Synchronization instrument ZTQ The 6th pin connection；The second end of contactor KM1 is connect with the first end of contactor KM2 normally-closed contact；Time relay KT's Second end is connect with the first end of the normally-closed contact K-3 of relay K；The second end and contactor of the normally-closed contact K-3 of relay K The first end of the normally opened contact KM1-2 of KM1 connects；The second end of the normally-closed contact K-2 of relay K is normally closed with contactor KM1's The first end of contact KM1-1 connects；The second end of the normally-closed contact KM1-1 of contactor KM1 and the first end of contactor KM2 connect It connects；The 3-4 pin of automatic Synchronization instrument ZTQ is grounded；

Button SB1 is dynamic circuit breaker self- recoverage type button；Button SB2 is dynamic circuit connector self- recoverage type button；Automatic Synchronization instrument ZTQ is ZTQ series automatic sub-synchronous device.

The working principle of automatic Synchronization instrument ZTQ: the integrated circuit shaping in the signal of power grid and the signal device of the machine, product After dividing, comparing, when the condition arranged side by side of power grid and the machine reaches requirement, i.e. phase difference, difference on the frequency, voltage difference reach item arranged side by side Part.Closing relay in device is just attracted immediately, and the grid-connected switch for making on distribution board (open by such as A.C. contactor, electric air Pass, electromagnetic switch etc.) it closes a floodgate rapidly, reach grid-connected purpose.

Holding circuit includes transformer T, rectifier bridge VC, capacitor C1-C2, Integrated circuit IC and relay K；

The first end of the normally opened contact K-1 of relay K is connect with the first end of transformer T primary coil；Transformer T is primary The second end of coil is grounded；The secondary coil of transformer T is connect with the ac input end of rectifier bridge VC；The anode of rectifier bridge VC point It is not connect with the input terminal of the first end of capacitor C1, Integrated circuit IC；The output end of Integrated circuit IC respectively with capacitor C2 The first end connection of one end, relay K；The cathode of rectifier bridge VC connects with the second end of capacitor C1-C2, Integrated circuit IC respectively Ground terminal, the connection of the second end of relay K；

Integrated circuit IC is 7812 type circuit of three-terminal voltage-stabilizing integrated；Relay K is 12V DC relay.

Working principle of the utility model is:

Use KM1 A.C. contactor as main switch arranged side by side, under the premise of phase sequence is correct, when not arranged side by side, two groups of dynamic circuit breakers Contact makes power grid A phase electricity and generator A phase electricity enter automatic Synchronization instrument ZTQ respectively.With to and generator speed rising, when When voltage, frequency, phase reach requirement, ZTQ movement, moving together contact closure makes KM1 coil obtain electric combined floodgate, generator is incorporated to electricity Net operation, KM1 itself is small, assists the closure of moving together contact and self-insurance works, and the combined floodgate of KM1 keeps ZTQ power loss out of service.

In entire and network process and operation, KM2 braking contactor does not put into operation, and (basic load is energy consumption salt water Pond), time relay KT devotes oneself to work after KM1 closes a floodgate, its moving together contact connects DC relay K self-sustaining work after the several seconds that is delayed Make.Because KM1 close a floodgate its break contact disconnect, KM2 braking contactor still without electricity without work, after K enters self-sustaining state, Break contact disconnection keeps time relay KT out of service.

After overcurrent, overvoltage make KM1 trip, the effect of KM2 normally-closed contact is protected to overvoltage, overcurrent Shield, KM1 drive sound-light alarm and KM2 braking contactor to devote oneself to work.

It should be noted that above-mentioned each technical characteristic continues to be combined with each other, the various embodiments not being enumerated above are formed, It is accordingly to be regarded as the range of the utility model specification record；Also, it for those of ordinary skills, can be according to above stating It is bright to be improved or converted, and all these modifications and variations all should belong to the protection model of the appended claims for the utility model It encloses.

Claims

1. a kind of generator automatic Synchronization control circuit, which is characterized in that including the control electricity with automatic Synchronization control sequential Road and using DC relay as the holding circuit of core；Pass through ac contactor in control circuit between three phase network and generator G Three groups of moving together contact of device connect；Assist control point of the holding circuit as control circuit；Control circuit respectively with three-phase electricity Net, generator G, holding circuit are electrically connected.

2. a kind of generator automatic Synchronization control circuit according to claim 1, which is characterized in that control circuit includes protecting Dangerous silk FU1-FU3, button SB1-SB2, contactor KM1-KM2, time relay KT and automatic Synchronization instrument ZTQ.

3. a kind of generator automatic Synchronization control circuit according to claim 2, which is characterized in that three-phase AC grid C phase is connect with the first end of fuse FU1；The second end of fuse FU1 is respectively with the normally opened contact KM1-2's of contactor KM1 The second end of second end, the second end of contactor KM2 and its normally-closed contact connects；The A phase and fuse FU2 of three-phase AC grid First end connection；The second end of fuse FU2 is connect with the first end of the normally-closed contact KM1-5 of contactor KM1；Contactor The second end of the normally-closed contact KM1-5 of KM1 is connect with the 1st pin of automatic Synchronization instrument ZTQ；The A phase and fuse of generator G The first end of FU3 connects；The second end of fuse FU3 respectively with the first end of the normally-closed contact KM1-4 of contactor KM1, button The first end of SB1, the second end of the first end of time relay KT and its normally opened contact KT-1, relay K normally opened contact K-1 Second end and its normally opened contact K-2 first end connection；The first end and relay of the normally opened contact KT-1 of time relay KT The first end of the normally opened contact K-1 of device K connects；The second end of button SB1 respectively with the first end of button SB2, contactor KM1 The 5th pin connection of the first end, automatic Synchronization instrument ZTQ of normally opened contact KM1-3；The first end of contactor KM1 respectively with button The 6th pin connection of the second end, the second end of the normally opened contact KM1-3 of contactor KM1, automatic Synchronization instrument ZTQ of SB2；Contact The second end of device KM1 is connect with the first end of contactor KM2 normally-closed contact；The second end of time relay KT is with relay K's The first end of normally-closed contact K-3 connects；The second end of the normally-closed contact K-3 of relay K and the normally opened contact KM1- of contactor KM1 2 first end connection；The first end of the normally-closed contact KM1-1 of the second end and contactor KM1 of the normally-closed contact K-2 of relay K Connection；The second end of the normally-closed contact KM1-1 of contactor KM1 is connect with the first end of contactor KM2；Automatic Synchronization instrument ZTQ's 3-4 pin is grounded.

4. a kind of generator automatic Synchronization control circuit according to claim 2 or 3, which is characterized in that button SB1 is Dynamic circuit breaker self- recoverage type button.

5. a kind of generator automatic Synchronization control circuit according to claim 4, which is characterized in that button SB2 is dynamic circuit connector Self- recoverage type button.

6. a kind of generator automatic Synchronization control circuit according to claim 5, which is characterized in that automatic Synchronization instrument ZTQ For ZTQ series automatic sub-synchronous device.

7. a kind of generator automatic Synchronization control circuit according to claim 1, which is characterized in that holding circuit includes becoming Depressor T, rectifier bridge VC, capacitor C1-C2, Integrated circuit IC and relay K.

8. a kind of generator automatic Synchronization control circuit according to claim 7, which is characterized in that relay K's is normally opened The first end of contact K-1 is connect with the first end of transformer T primary coil；The second end of transformer T primary coil is grounded；Transformation The secondary coil of device T is connect with the ac input end of rectifier bridge VC；Rectifier bridge VC anode respectively with the first end of capacitor C1, collection It is connected at the input terminal of IC circuit；The output end of Integrated circuit IC connects with the first end of capacitor C2, the first end of relay K respectively It connects；The cathode of rectifier bridge VC connects with the second end of the second end of capacitor C1-C2, the ground terminal of Integrated circuit IC, relay K respectively It connects.

9. a kind of generator automatic Synchronization control circuit according to claim 7 or 8, which is characterized in that integrated circuit IC is 7812 type circuit of three-terminal voltage-stabilizing integrated.

10. a kind of generator automatic Synchronization control circuit according to claim 9, which is characterized in that relay K is 12V DC relay.