CN205829189U - A kind of low-tension unit synchronous device - Google Patents
A kind of low-tension unit synchronous device Download PDFInfo
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- CN205829189U CN205829189U CN201620775901.2U CN201620775901U CN205829189U CN 205829189 U CN205829189 U CN 205829189U CN 201620775901 U CN201620775901 U CN 201620775901U CN 205829189 U CN205829189 U CN 205829189U
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Abstract
The utility model discloses a kind of low-tension unit synchronous device, including control module, Generator test module, electrical network detection module, electromotor adjusting module, closing switch.The voltage effective value of electrical power generators, frequency, phase place are sampled by Generator test module.The voltage effective value of electrical network, frequency, phase place are sampled by electrical network detection module.Control module receives Generator test module, the sample information of electrical network detection module respectively, and synchronous voltage between analysis generator and electrical network is poor, difference on the frequency, phase contrast；Control module adjusts the voltage of electrical power generators, frequency and phase place by motor adjusting module；When synchronous voltage is poor, after difference on the frequency, phase contrast meet condition, control module realizes grid-connected to closing switch generation reclosing command.This synchronous device can the most automatically detect pressure reduction, the frequency difference between electromotor with electrical network, differ, and is adjusted electromotor so that it is meet grid-connected regulation with electrical network, it is achieved automatic synchronizing paralleling.
Description
Technical field
This utility model relates to generating set and electrical network parallel technology field, particularly relates to low-tension unit synchronous device.
Background technology
I.e. switchgear both sides voltage swing was equal, frequency is equal the same period, phase place is identical, and the effect of synchronous device is used to
Judge whether chopper both sides reach the condition same period, thus determine to perform the grid-connected special purpose device that closes a floodgate.
Current power industrial expansion is rapid, and the scale of electrical network increases and the complicated variation of electricity consumption situation, existing
Technology is at the grid-connected aspect comparative maturity of large-scale power grid, but the grid-connected technical disadvantages of existing synchronous device is: 1, the grid-connected time
Long；2, operation complexity, needs very professional personnel to operate；3, the grid-connected case study of user for small power station is compared
Few, general simultaneous interconnecting device is expensive, and most small power station also uses manual simultaneous interconnecting mode.
Utility model content
For the deficiencies in the prior art, the utility model proposes a kind of low-tension unit synchronous device, this synchronous device can
The most automatically detect pressure reduction, frequency difference between electromotor and electrical network, differ, and electromotor is adjusted so that it is be full with electrical network
The grid-connected regulation of foot, it is achieved automatic synchronizing paralleling, solve length of existing synchronous device grid-connected time, cannot the problem of auto-parallel.
To achieve these goals, technical solutions of the utility model are as follows:
A kind of low-tension unit synchronous device, including control module, also include Generator test module, electrical network detection module,
Electromotor adjusting module, closing switch.Described Generator test module is to the voltage effective value of electrical power generators, frequency, phase place
Sample.The voltage effective value of electrical network, frequency, phase place are sampled by described electrical network detection module.Described control module is divided
Do not receive described Generator test module, the sample information of electrical network detection module, and the same period between analysis generator and electrical network
Voltage difference, difference on the frequency, phase contrast；Described control module by described motor adjusting module adjust the voltage of electrical power generators,
Frequency and phase place；When described synchronous voltage is poor, after difference on the frequency, phase contrast meet condition, described control module is opened to described combined floodgate
Close and occur reclosing command to realize grid-connected.
Further, described Generator test module comprises anti-interference filtration unit, pressure unit, D.C mutual-inductor, pincers
Bit location, the first operation amplifier unit, the first filter unit, zero balancing converting unit, the second operation amplifier unit, the second filtering
Unit, phase convertor.The sampled signal of electromotor first passes around anti-interference filtration unit and filters electromagnetic interference；Again through pressure unit
Carry out blood pressure lowering；Sampled signal after blood pressure lowering is converted into low current signal by D.C mutual-inductor；Clamping unit is for AC mutual induction
The described low current signal of device output carries out voltage clamp；Described low current signal through first operation amplifier unit amplify after,
It is filtered through the first filter unit again；Sampled signal after after filtering, a road respectively through the second operation amplifier unit,
Second filter unit, the amplification of phase convertor, filtering, covert process after incoming control module, for voltage effective value, phase place point
Analysis；Another road is incoming control module after comparator is converted into pulse signal, for phase sequence, the analysis of frequency.
Further, closing switch comprises resistance R31, R33, photoelectrical coupler GO1, diode D31, relay J 31.Electricity
The input of resistance R31 is connected with described control module；The outfan of resistance R31 is connected with the input of photoelectrical coupler GO1
Connect；The outfan of photoelectrical coupler GO1 is connected with the control end of relay J 31 through resistance R33；Relay J 31 respectively with
Electromotor, electrical network are connected；Diode D31 is connected in parallel on the control end of relay J 31.
Further, described second operation amplifier unit comprises operational amplifier U25, resistance R31, R32, R33, R34.Fortune
Calculate the normal phase input end of amplifier U25 through resistance R32 ground connection；First filter unit is through resistance R31 and operational amplifier U25
Inverting input be connected；The outfan of operational amplifier U25 is connected through resistance R34 and the second filter unit；And
The outfan of operational amplifier U25 is connected with normal phase input end through resistance R33.
Further, described second filter unit comprises electric capacity C31, stabilivolt D41.Second operation amplifier unit warp respectively
Cross electric capacity C31, stabilivolt D41 ground connection.
The beneficial effects of the utility model:
This synchronous device can the most automatically detect pressure reduction, the frequency difference between electromotor with electrical network, differ, and enters electromotor
Row sum-equal matrix so that it is meet grid-connected regulation with electrical network, it is achieved automatic synchronizing paralleling.
Accompanying drawing explanation
Fig. 1 is functional-block diagram of the present utility model.
Fig. 2 is the circuit theory diagrams of Generator test module in Fig. 1.
Fig. 3 is the circuit theory diagrams of closing switch in Fig. 1.
Wherein, the reference of Fig. 1-Fig. 3 is: control module 1, also includes Generator test module 2, electrical network detection module
3, electromotor adjusting module 4, closing switch 5, anti-interference filtration unit 21, pressure unit 22, D.C mutual-inductor 23, clamping unit
24, first operation amplifier unit the 25, first filter unit 26, zero balancing converting unit the 27, second operation amplifier unit 28, second
Filter unit 29, phase convertor 30.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment, this utility model is expanded on further.
As it is shown in figure 1, a kind of low-tension unit synchronous device, including control module 1, also include Generator test module 2, electricity
Net detection module 3, electromotor adjusting module 4, closing switch 5.The voltage of electrical power generators is had by described Generator test module 2
Valid value, frequency, phase place are sampled.The voltage effective value of electrical network, frequency, phase place are sampled by described electrical network detection module 3.
Described control module 1 receives described Generator test module 2, the sample information of electrical network detection module 3, and analysis generator respectively
And the synchronous voltage between electrical network is poor, difference on the frequency, phase contrast；Described control module 1 is adjusted by described motor adjusting module
The voltage of electrical power generators, frequency and phase place；When described synchronous voltage is poor, after difference on the frequency, phase contrast meet condition, described control
It is grid-connected that module 1 occurs reclosing command to realize to described closing switch 5.
As in figure 2 it is shown, Generator test module 2 comprises anti-interference filtration unit 21, pressure unit 22, D.C mutual-inductor
23, clamping unit the 24, first operation amplifier unit the 25, first filter unit 26, zero balancing converting unit the 27, second operation amplifier
Unit the 28, second filter unit 29, phase convertor 30.
The sampled signal of electromotor first passes around anti-interference filtration unit 21 and filters electromagnetic interference；Again through pressure unit 22
Carry out blood pressure lowering；Sampled signal after blood pressure lowering is converted into low current signal by D.C mutual-inductor 23；Clamping unit 24 is for exchange
The described low current signal of transformer 23 output carries out voltage clamp；Described low current signal is through the first operation amplifier unit 25
After amplification, then carry out rear class filtering through the first filter unit 26；Through the filtered sampled signal of rear class, a road respectively through
Incoming control module after second operation amplifier unit the 28, second filter unit 29, the amplification of phase convertor 30, filtering, covert process
1, for voltage effective value, the analysis of phase place；Another road is incoming control module 1 after comparator is converted into pulse signal, uses
In phase sequence, the analysis of frequency.
Specifically, anti-interference filtration unit 21 comprises electric capacity C21, C22, and electric capacity C21 is just being connected on Generator test module 2
Between pole input and ground；Electric capacity C22 is connected between negative input and the ground of Generator test module 2.Pressure unit 22 wraps
Containing resistance R11, R12, R13, R14.Resistance R11, R12 are sequentially connected in series the electrode input end in Generator test module 2；Resistance
R13, R14 are sequentially connected in series the negative input in Generator test module 2.D.C mutual-inductor 23 comprises spiral shell magnetic coil, resistance
R15、R16.Resistance R15, R16 are connected on the positive and negative outfan of spiral shell magnetic coil respectively.Clamping unit 24 comprises diode D1, D2.
The input of diode D1 and diode D2 is connected with outfan circulation.The sampled signal of electromotor is clamped down on by clamping unit 24
Between-0.7V-0.7V, and keep original waveform shape invariance.First operation amplifier unit 25 comprises an operational amplifier, resistance
R17.The outfan of operational amplifier feeds back to the cathode output end of D.C mutual-inductor 23 through resistance R17.First filter unit
26 comprise electric capacity C11, C12, C13, resistance R18, R19.Electric capacity C11 is in parallel with resistance R17；Resistance R18 and the first operation amplifier
The outfan of unit 25 is connected；The outfan of resistance R18 is connected with zero balancing converting unit 27 through electric capacity C12.Second
Operation amplifier unit 28 comprises operational amplifier U25, resistance R31, R32, R33, R34.The normal phase input end of operational amplifier U25
Through resistance R32 ground connection；First filter unit 26 is connected through the inverting input of resistance R31 with operational amplifier U25；Fortune
The outfan calculating amplifier U25 is connected through resistance R34 and the second filter unit 29；And the output of operational amplifier U25
End is connected with normal phase input end through resistance R33.Second filter unit 29 comprises electric capacity C31, stabilivolt D41.Second computing
Amplifying unit 28 is respectively through electric capacity C31, stabilivolt D41 ground connection.Stabilivolt D41 prevents from being input to the voltage mistake of control module 1
Greatly.
The circuit theory of electrical network detection module 3 is identical with Generator test module 2, is described again here.
As it is shown on figure 3, closing switch 5 comprises resistance R31, R33, photoelectrical coupler GO1, diode D31, relay J 31.
The input of resistance R31 is connected with described control module 1；The input phase of the outfan of resistance R31 and photoelectrical coupler GO1
Connect；The outfan of photoelectrical coupler GO1 is connected with the control end of relay J 31 through resistance R33；Relay J 31 is respectively
It is connected with electromotor, electrical network；Diode D31 is connected in parallel on the control end of relay J 31.Relay J 31 uses two-way switch,
The load capacity of relay can be improved.
Above-described is only preferred implementation of the present utility model, and this utility model is not limited to above example.Can
With understand, those skilled in the art directly derive on the premise of without departing from basic conception of the present utility model or associate its
Within its improvement and change are all considered as being included in protection domain of the present utility model.
Claims (5)
1. a low-tension unit synchronous device, including control module, it is characterised in that:
Also include Generator test module, electrical network detection module, electromotor adjusting module, closing switch；
The voltage effective value of electrical power generators, frequency, phase place are sampled by described Generator test module；Described electrical network detects
The voltage effective value of electrical network, frequency, phase place are sampled by module；
Described control module receives described Generator test module, the sample information of electrical network detection module respectively, and analyzes generating
Synchronous voltage between machine and electrical network is poor, difference on the frequency, phase contrast；Described control module is adjusted by described motor adjusting module
The voltage of electrical power generators, frequency and phase place；When described synchronous voltage is poor, after difference on the frequency, phase contrast meet condition, described control
Module realizes grid-connected to described closing switch generation reclosing command.
Low-tension unit synchronous device the most according to claim 1, it is characterised in that:
Described Generator test module comprises anti-interference filtration unit, pressure unit, D.C mutual-inductor, clamping unit, the first fortune
Calculate amplifying unit, the first filter unit, zero balancing converting unit, the second operation amplifier unit, the second filter unit, phase convertor；
The sampled signal of electromotor first passes around anti-interference filtration unit and filters electromagnetic interference；Drop through pressure unit again
Pressure；Sampled signal after blood pressure lowering is converted into low current signal by D.C mutual-inductor；Clamping unit is for exporting D.C mutual-inductor
Described low current signal carry out voltage clamp；Described low current signal is after the first operation amplifier unit amplifies, then passes through
First filter unit is filtered；Sampled signal after after filtering, a road is respectively through the second operation amplifier unit, the second filter
Incoming control module after ripple unit, the amplification of phase convertor, filtering, covert process, for voltage effective value, the analysis of phase place；Separately
One tunnel is incoming control module after comparator is converted into pulse signal, for phase sequence, the analysis of frequency.
Low-tension unit synchronous device the most according to claim 1, it is characterised in that:
Closing switch comprises resistance R31, R33, photoelectrical coupler GO1, diode D31, relay J 31；
The input of resistance R31 is connected with described control module；The outfan of resistance R31 and the input of photoelectrical coupler GO1
End is connected；The outfan of photoelectrical coupler GO1 is connected with the control end of relay J 31 through resistance R33；Relay J 31
It is connected with electromotor, electrical network respectively；Diode D31 is connected in parallel on the control end of relay J 31.
Low-tension unit synchronous device the most according to claim 2, it is characterised in that:
Described second operation amplifier unit comprises operational amplifier U25, resistance R31, R32, R33, R34；
The normal phase input end of operational amplifier U25 is through resistance R32 ground connection；First filter unit is put with computing through resistance R31
The inverting input of big device U25 is connected；The outfan of operational amplifier U25 is connected through resistance R34 and the second filter unit
Connect；And the outfan of operational amplifier U25 is connected with normal phase input end through resistance R33.
Low-tension unit synchronous device the most according to claim 2, it is characterised in that:
Described second filter unit comprises electric capacity C31, stabilivolt D41；
Described second operation amplifier unit is respectively through electric capacity C31, stabilivolt D41 ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620775901.2U CN205829189U (en) | 2016-07-22 | 2016-07-22 | A kind of low-tension unit synchronous device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620775901.2U CN205829189U (en) | 2016-07-22 | 2016-07-22 | A kind of low-tension unit synchronous device |
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| Publication Number | Publication Date |
|---|---|
| CN205829189U true CN205829189U (en) | 2016-12-21 |
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| CN201620775901.2U Expired - Fee Related CN205829189U (en) | 2016-07-22 | 2016-07-22 | A kind of low-tension unit synchronous device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109742845A (en) * | 2018-12-28 | 2019-05-10 | 江苏金智科技股份有限公司 | A kind of power supply fast switching device rapid closing method based on optimal phase |
| CN109901067A (en) * | 2019-02-25 | 2019-06-18 | 苏州工业园区艾思科技有限公司 | A kind of non-contact permanent magnetic synchronous motor test device and its speed-measuring method |
| CN112290599A (en) * | 2020-10-10 | 2021-01-29 | 上海二十冶建设有限公司 | Power generation grid-connected nuclear phase protection device and use method thereof |
| CN112713827A (en) * | 2020-12-31 | 2021-04-27 | 深圳市品鼎科技有限公司 | Generator set expander control system |
-
2016
- 2016-07-22 CN CN201620775901.2U patent/CN205829189U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109742845A (en) * | 2018-12-28 | 2019-05-10 | 江苏金智科技股份有限公司 | A kind of power supply fast switching device rapid closing method based on optimal phase |
| CN109742845B (en) * | 2018-12-28 | 2022-08-09 | 江苏金智科技股份有限公司 | Rapid switching-on method of power supply rapid switching-off device based on optimal phase |
| CN109901067A (en) * | 2019-02-25 | 2019-06-18 | 苏州工业园区艾思科技有限公司 | A kind of non-contact permanent magnetic synchronous motor test device and its speed-measuring method |
| CN112290599A (en) * | 2020-10-10 | 2021-01-29 | 上海二十冶建设有限公司 | Power generation grid-connected nuclear phase protection device and use method thereof |
| CN112713827A (en) * | 2020-12-31 | 2021-04-27 | 深圳市品鼎科技有限公司 | Generator set expander control system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 518057 Nanshan District science and technology two road Shenzhen Software Park 12, 502, Shenzhen, Guangdong Patentee after: Shenzhen Blue Shield Full Thai science and Technology Development Co.,Ltd. Address before: 518000 Nanshan District science and technology two road Shenzhen Software Park 12, 502, Shenzhen, Guangdong Patentee before: SHENZHEN MOUNTAIN TECHNOLOGY DEVELOPMENT CO.,LTD. |
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| CP03 | Change of name, title or address | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161221 |
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| CF01 | Termination of patent right due to non-payment of annual fee |