CN206712466U - The reactive voltage adjusting means of distribution network line end - Google Patents
The reactive voltage adjusting means of distribution network line end Download PDFInfo
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- CN206712466U CN206712466U CN201720303426.3U CN201720303426U CN206712466U CN 206712466 U CN206712466 U CN 206712466U CN 201720303426 U CN201720303426 U CN 201720303426U CN 206712466 U CN206712466 U CN 206712466U
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- network line
- output
- adjusting means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
It the utility model is related to a kind of reactive voltage adjusting means of distribution network line end, including adjustable transformer, capacitance module, the first A.C. contactor, first voltage sample circuit, second voltage sample circuit, current sampling circuit and controller；The secondary coil of adjustable transformer is in parallel with capacitance module, the voltage input end of one end connection distribution network line end of the bucking coil of adjustable transformer, the other end of bucking coil connects the voltage output end of distribution network line end by current sampling circuit, the other end of bucking coil also connects a side terminal of adjustable transformer by the first A.C. contactor, one end of first voltage sample circuit connects the voltage input end, the other end connection controller of first voltage sample circuit, one end of second voltage sample circuit connects the voltage output end, the other end connection controller of the second voltage sample circuit, the controller is also respectively connected with the adjustable transformer, capacitance module and current sampling circuit.
Description
Technical field
Technical field of electric power is the utility model is related to, is adjusted more particularly to a kind of reactive voltage of distribution network line end
Device.
Background technology
Distribution network structure at this stage is relatively weak, and electricity consumption region area is big, and substation location is less, line powering radius
It is long, easily cause line end voltage and get over lower limit；In addition, electricity consumption amount is more, region disperses, and family load is small and spatial and temporal distributions
Inequality, cause power transmission less efficient, and seasonal effect is larger, peak hours terminal voltage is relatively low.Power distribution network power supply capacity
Deficiency, it is poor to also result in certain customers' power quality, the problems such as power surplus or vacancy be present.The aging of power equipment
Problem, capacity of distribution transform are chosen unreasonable, the imperfection of auxiliary equipment and more in the small line footpath access of rural area mountain route distal end
Small power station, it is difficult to United Dispatching management, the serious factors influence supplying power allocation such as higher of abundance of water season some areas voltage
Security, reliability and economy.
The reactive voltage regulation scheme of traditional distribution network line end includes：Entered using structures such as capacitor and reactors
Row reactive-load compensation and DG (distributed power source) using adjustable transformer and with Reactive-power control ability are accordingly adjusted,
Although it is favorably improved voltage and reduces power attenuation, its capacitive and inductive compensation separation, discrete adjustment, easily make idle
The regulating effect of voltage is poor.
Utility model content
Based on this, it is necessary to easily make the technical problem of the regulating effect difference of reactive voltage for traditional scheme, there is provided one
The reactive voltage adjusting means of kind distribution network line end.
A kind of reactive voltage adjusting means of distribution network line end, including adjustable transformer, capacitance module, the first exchange
Contactor, first voltage sample circuit, second voltage sample circuit, current sampling circuit and controller；
The secondary coil of the adjustable transformer is in parallel with capacitance module, is compensated in the secondary coil of the adjustable transformer
The voltage input end of one end connection distribution network line end of coil, the other end of the bucking coil pass through current sample electricity
The voltage output end of road connection distribution network line end, the other end of the bucking coil connect institute by the first A.C. contactor
A side terminal of adjustable transformer is stated, one end of the first voltage sample circuit connects the voltage input end, described
The other end connection controller of first voltage sample circuit, one end of the second voltage sample circuit connects the voltage output
End, the second voltage sample circuit the other end connection controller, the controller be also respectively connected with the adjustable transformer,
Capacitance module and current sampling circuit.
The reactive voltage adjusting means of above-mentioned distribution network line end, by the secondary coil and capacitance module of adjustable transformer
Parallel connection, and one end of bucking coil connects the voltage input end of distribution network line end in the secondary coil of adjustable transformer, mends
The other end for repaying coil connects the voltage output end of distribution network line end, the other end of bucking coil by current sampling circuit
A side terminal of the adjustable transformer, one end connection of first voltage sample circuit are connected by the first A.C. contactor
The voltage input end, the other end connection controller of first voltage sample circuit, one end connection of second voltage sample circuit
The voltage output end, the other end connection controller of second voltage sample circuit, the controller are also respectively connected with the tune
Pressure transformer, capacitance module and current sampling circuit；So controller can according to the correlated current of distribution network line end,
Voltage signal, regulating command accurately is exported to adjustable transformer, above-mentioned adjustable transformer is entered according to above-mentioned regulating command
The corresponding reactive voltage regulation of row, has preferable regulating effect.
Brief description of the drawings
Fig. 1 is the reactive voltage adjusting means structural representation of the distribution network line end of one embodiment；
Fig. 2 is the reactive voltage adjusting means structural representation of the distribution network line end of one embodiment；
Fig. 3 is the controller architecture schematic diagram of one embodiment.
Embodiment
Below in conjunction with the accompanying drawings to the specific of the reactive voltage adjusting means of distribution network line end provided by the utility model
Embodiment is described in detail.
With reference to figure 1, Fig. 1 show the reactive voltage adjusting means structural representation of the distribution network line end of one embodiment
Figure, including adjustable transformer 10, capacitance module 21, the first A.C. contactor 22, first voltage sample circuit 23, second voltage are adopted
Sample circuit 24, current sampling circuit 25 and controller 26；
The secondary coil of the adjustable transformer 10 is in parallel with capacitance module 21, the secondary coil of the adjustable transformer 10
The voltage input end of one end connection distribution network line end of middle bucking coil 11, the other end of the bucking coil 11 pass through electricity
The voltage output end that sample circuit 25 connects distribution network line end is flowed, the other end of the bucking coil 11 passes through the first exchange
Side terminal of adjustable transformer 10 described in contactor 22, one end of the first voltage sample circuit 23 connect the electricity
Input is pressed, the other end of the first voltage sample circuit 23 connects controller 26, the second voltage sample circuit 24
One end connects the voltage output end, the other end connection controller 26 of the second voltage sample circuit 24, the controller
26 are also respectively connected with the adjustable transformer 10, capacitance module 21 and current sampling circuit 25.
As shown in figure 1, the other end of above-mentioned bucking coil 11 can also connect distribution netting twine according to corresponding application demand
The zero line side of road end.
The reactive voltage adjusting means for the distribution network line end that the present embodiment provides, by the secondary line of adjustable transformer 10
Circle is in parallel with capacitance module 21, and one end of bucking coil 11 connects distribution network line end in the secondary coil of adjustable transformer 10
The voltage input end at end, the other end of bucking coil 11 are defeated by the voltage of the connection distribution network line of current sampling circuit 25 end
Go out end, the other end of bucking coil 11 connects the primary side wiring of the adjustable transformer 10 by the first A.C. contactor 22
End, one end of first voltage sample circuit 23 connect the voltage input end, the other end connection of first voltage sample circuit 23
Controller 26, one end of second voltage sample circuit 24 connect the voltage output end, second voltage sample circuit 24 it is another
End connection controller 26, the controller 26 are also respectively connected with the adjustable transformer 10, capacitance module 24 and current sample
Circuit 25；Correlated current that so controller 26 can be according to distribution network line end, voltage signal, accurately to adjustable transformer
Regulating command is exported, above-mentioned adjustable transformer 10 is carried out corresponding reactive voltage regulation, tool according to above-mentioned regulating command
There is preferable regulating effect.
With reference to shown in figure 2, in one embodiment, the reactive voltage adjusting means of above-mentioned distribution network line end, may be used also
To be connected to voltage input end and the compensating line including the A.C. contactor 28 of compensating switch 27 and second, the compensating switch 27
Between one end of circle 11, second A.C. contactor 28 is connected between the current sampling circuit 25 and voltage output end.
The above-mentioned A.C. contactor 28 of compensating switch 27 and second, which can cooperate, controls above-mentioned distribution network line end
The break-make of reactive voltage adjusting means and which part branch road, to improve the security of reactive voltage adjustment device work.
With reference to shown in figure 2, in one embodiment, the reactive voltage adjusting means of above-mentioned distribution network line end, may be used also
To be connected including the 3rd A.C. contactor 29, the 3rd A.C. contactor 29 between voltage input end and voltage output end.
As shown in Fig. 2 above-mentioned 3rd A.C. contactor 29 closes, the first A.C. contactor 22 and the second A.C. contactor 28
When disconnecting, adjustable transformer 10 is in bypass condition, can not carry out pressure regulation；First A.C. contactor 22 exchanges with second
Contactor 28 closes, and when the 3rd A.C. contactor 29 disconnects, adjustable transformer 10 is in pressure regulation state, and controller 26 can be sent out
Signal of transferring the files is sent to adjust the gear of above-mentioned adjustable transformer 10 to adjustable transformer 10.
In the present embodiment, when controller 26 detects the associated control signal of distribution network line end, by the 3rd exchange
Contactor 29 closes, and can ensure above-mentioned adjustable transformer to stop the reactive voltage adjustment work of corresponding adjustable transformer 10
The security of 10 work.
With reference to shown in figure 2, in one embodiment, the reactive voltage adjusting means of above-mentioned distribution network line end, may be used also
To be connected to including electric capacity 31, above-mentioned electric capacity 31 between voltage input end and ground terminal, to ensure that above-mentioned adjustable transformer 10 works
Security.
With reference to shown in figure 2, in one embodiment, the reactive voltage adjusting means of above-mentioned distribution network line end, may be used also
So that including distant place main website 35 and communication module 36, above-mentioned distant place main website 35 controller can be connected by communication module 36
26。
Above-mentioned distant place main website 35 can be the control devices such as the server for being arranged on relevant control station；Communication module 36 can be with
For related communication supervisor.Telecommunication management, a distant place are carried out to controller 26 by above-mentioned communication module 36 by distant place main website 35
Main website 35 can obtain the current signal, output voltage signal and input electricity of the adjustable transformer 10 of the collection of controller noted above 26
The information datas such as signal are pressed, above-mentioned current signal, output voltage signal and input voltage can be believed with Read Controller 26
Number etc. data handle the status datas of the adjustable transformers 10 such as resulting output end power factor, so as to related work people
Member can obtain the working condition of adjustable transformer 10 by above-mentioned distant place main website 35, realize the prison to above-mentioned adjustable transformer 10
Survey.
In one embodiment, above-mentioned current sampling circuit can include current transformer, and the one of the current transformer
End connects the other end of the bucking coil, the other end connection voltage output end of the current transformer.
The present embodiment realizes the sampling to corresponding current signal by current transformer, it is ensured that to current signal
Sample effect.
In one embodiment, above-mentioned capacitance module can include multiple unit capacitor；The controller reads current sample
The current signal of circuit collection and the output voltage signal of second voltage sample circuit collection, output capacitor access letter
Number to the capacitance module, the capacitance module accesses signal behavior switched capacitor according to the capacitor of reception.
As one embodiment, controller noted above can read the current signal of current sampling circuit collection, first voltage
The input voltage signal of sample circuit collection and the output voltage signal of second voltage sample circuit collection, calculate output
Hold power factor and input power factor.
In the present embodiment, controller noted above reads the current signal of current sampling circuit collection, first voltage sample circuit
The input voltage signal of collection and the output voltage signal of second voltage sample circuit collection, to calculate distribution network line
The output end power factor of end, need to access the capacitance of circuit with this determination capacitance module, specific above-mentioned electric capacity holds
Amount can be defined as the 30% to 40% of above-mentioned distribution network line end reactive voltage adjusting means capacity.Capacitance module can obtain
The capacitance for needing to access circuit determined by controller is taken, according to the parameter attribute of its capacitor, it is determined that the electric capacity of access
Device number, control corresponding capacitance device switching to corresponding circuit.
As one embodiment, when output end power factor is less than Eligibility requirements value cos Φ, capacitance module input is carried out
Reactive-load compensation；When output end power factor is more than or equal to Eligibility requirements value cos Φ, the capacitance module is cut off.
Above-mentioned Eligibility requirements value cos Φ can be determined according to the relevant configuration feature of distribution network line tail circuit.When
When output end power factor is less than Eligibility requirements value cos Φ, capacitance module input carries out reactive-load compensation, the i.e. control in controller
Under, access above-mentioned capacitance module；When output end power factor is more than or equal to Eligibility requirements value cos Φ, the electricity is cut off
Molar block, above-mentioned capacitance module is disconnected, overcompensation caused by avoid capacitance module, realize the technique effect of energy-conservation.
In one embodiment, controller noted above can read the output voltage signal of second voltage sample circuit collection,
Detect output voltage values corresponding to the output voltage signal.
As one embodiment, when above-mentioned output voltage values are between voltage acceptability limit, the adjustable transformer switching
To bypass condition；When the output voltage values are between under-voltage value and qualified lower limit, the adjustable transformer is in boosting shelves
Position, as the gear of adjustable transformer can be adjusted up one grade；The output voltage values are in voltage in qualified higher limit and overvoltage
When between value, the adjustable transformer is in decompression gear, as the gear of adjustable transformer can adjust one grade downwards；It is described defeated
Go out magnitude of voltage less than the under-voltage value, or during more than the overpressure value, the adjustable transformer switches to bypass condition.
Above-mentioned adjustable transformer in the course of the work, has voltage acceptability limit (Uln~Uhn), under-voltage value UlAnd mistake
Pressure value Uh.In above-mentioned voltage acceptability limit, Uln represents qualified lower limit, and Uhn represents qualified higher limit.The present embodiment can be real
Now the high accuracy of adjustable transformer is adjusted, makes corresponding reactive voltage regulation that there is more preferable regulating effect.
In the practical application of the reactive voltage adjusting means of above-mentioned distribution network line end, controller noted above can be set
Input signal interface, signal output module, CPU module, display module and power module, the structural representation of controller noted above can
With with reference to shown in figure 3；
Above-mentioned input signal interface is provided with signal input part and signal output part, and signal input part is the signal of controller
Input, signal output part are connected with the signal input part of CPU module；Control signal output module be provided with signal input part and
Signal output part, signal input part are connected with the signal output part of CPU module, and signal output part is the signal of control unit
Output end；CPU module is provided with interactive signal end, signal input part and signal output part；Interactive signal end and the friendship of display module
Mutual signal end is connected；Display module is provided with interactive signal end；Power module is control signal output module, CPU module, display
Module provides working power.
Above-mentioned controller can use conventional voltage hierarchical control scheme regulation adjustable transformer：When line end is defeated
Enter voltage in voltage acceptability limit (Uln~Uhn) between when, without pressure regulation, be switched to bypass condition automatically；When line end inputs
Voltage (U between under-voltage value and qualified lower limitl~Uln) or voltage (U between qualified higher limit and overpressure valuehn~Uh)
When, adjusted by the gear for adjusting adjustable transformer to adjust voltage, to ensure that circuit output terminal voltage is in acceptability limit；When
Input terminal voltage UEnterIn under-voltage, i.e. UEnter<UlOr in overvoltage, i.e. UEnter>UhWhen, protection startup switches to bypass condition；When defeated
When going out to hold the power factor be less than Eligibility requirements value cos Φ, capacitance module can be put under the control of the controller carries out idle benefit
Repay；When output end power factor meets the requirements, without compensation, capacitance module can be cut off.
The principle of above-mentioned voltage hierarchical control can be：
Uln<U<Uhn；U<Ul；U>Uh：Adjustable transformer is in bypass condition；
Ul<U<Uln：Adjustable transformer is in boosting gear；
Uhn<U<Uh：Adjustable transformer is in decompression gear；
cosΦGo out<cosΦ：Put into capacitor bank；
cosΦGo out>cosΦ：Cut off capacitor bank.
Wherein, U is input terminal voltage measured value, UlnFor qualified voltage lower limit, UhnFor qualified voltage higher limit, UlIt is deficient
Pressure protection definite value (under-voltage value), UhFor overvoltage protection definite value (overpressure value), cos Φ are that qualified power factor lower limit is (qualified to want
Evaluation), cos ΦGo outTo survey output end power factor.Above-mentioned signal output module can be defeated with time delay module and control signal
Outgoing interface.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more specific and detailed,
But therefore it can not be interpreted as the limitation to utility model patent scope.It should be pointed out that the common skill for this area
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of reactive voltage adjusting means of distribution network line end, it is characterised in that including adjustable transformer, electric capacity mould
Block, the first A.C. contactor, first voltage sample circuit, second voltage sample circuit, current sampling circuit and controller；
The secondary coil of the adjustable transformer is in parallel with capacitance module, bucking coil in the secondary coil of the adjustable transformer
One end connection distribution network line end voltage input end, the other end of the bucking coil connected by current sampling circuit
The voltage output end of distribution network line end, the other end of the bucking coil connect the pressure regulation by the first A.C. contactor
Side terminal of transformer, one end of the first voltage sample circuit connect the voltage input end, first electricity
The other end connection controller of sample circuit is pressed, one end of the second voltage sample circuit connects the voltage output end, institute
The other end connection controller of second voltage sample circuit is stated, the controller is also respectively connected with the adjustable transformer, electric capacity
Module and current sampling circuit.
2. the reactive voltage adjusting means of distribution network line end according to claim 1, it is characterised in that also include mending
Switch and the second A.C. contactor are repaid, the compensating switch is connected between one end of voltage input end and the bucking coil,
Second A.C. contactor is connected between the current sampling circuit and voltage output end.
3. the reactive voltage adjusting means of distribution network line end according to claim 1, it is characterised in that also including
Three A.C. contactors, between the 3rd A.C. contactor connection voltage input end and voltage output end.
4. the reactive voltage adjusting means of the distribution network line end according to any one of claims 1 to 3, its feature exist
In the current sampling circuit includes current transformer, and one end of the current transformer connects the another of the bucking coil
End, the other end connection voltage output end of the current transformer.
5. the reactive voltage adjusting means of the distribution network line end according to any one of claims 1 to 3, its feature exist
In the capacitance module includes multiple unit capacitor；The controller reads current signal and the institute of current sampling circuit collection
The output voltage signal of second voltage sample circuit collection is stated, output capacitor accesses signal to the capacitance module, the electricity
Molar block accesses signal behavior switched capacitor according to the capacitor of reception.
6. the reactive voltage adjusting means of distribution network line end according to claim 5, it is characterised in that the control
Device reads the current signal of current sampling circuit collection, the input voltage signal of first voltage sample circuit collection and described the
The output voltage signal of two voltage sampling circuits collection, calculates output end power factor and input power factor.
7. the reactive voltage adjusting means of distribution network line end according to claim 6, it is characterised in that work as output end
When power factor is less than Eligibility requirements value cos Φ, capacitance module input carries out reactive-load compensation；Be more than when output end power factor or
When person is equal to Eligibility requirements value cos Φ, the capacitance module is cut off.
8. the reactive voltage adjusting means of the distribution network line end according to any one of claims 1 to 3, its feature exist
In the controller reads the output voltage signal of second voltage sample circuit collection, and it is corresponding to detect the output voltage signal
Output voltage values.
9. the reactive voltage adjusting means of distribution network line end according to claim 8, it is characterised in that the output
When magnitude of voltage is between voltage acceptability limit, the adjustable transformer switches to bypass condition；The output voltage values are under-voltage
When between value and qualified lower limit, the adjustable transformer is in boosting gear；The output voltage values are in voltage on qualified
When between limit value and overpressure value, the adjustable transformer is in decompression gear；The output voltage values less than the under-voltage value,
Or during more than the overpressure value, the adjustable transformer switches to bypass condition.
10. the reactive voltage adjusting means of the distribution network line end according to any one of claims 1 to 3, its feature exist
In, in addition to distant place main website and communication module, the distant place main website connect controller by communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720303426.3U CN206712466U (en) | 2017-03-24 | 2017-03-24 | The reactive voltage adjusting means of distribution network line end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720303426.3U CN206712466U (en) | 2017-03-24 | 2017-03-24 | The reactive voltage adjusting means of distribution network line end |
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| Publication Number | Publication Date |
|---|---|
| CN206712466U true CN206712466U (en) | 2017-12-05 |
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ID=60467409
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720303426.3U Active CN206712466U (en) | 2017-03-24 | 2017-03-24 | The reactive voltage adjusting means of distribution network line end |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111130103A (en) * | 2020-01-06 | 2020-05-08 | 国网浙江省电力有限公司电力科学研究院 | Method for setting running gear of generator and phase modulator step-up transformer |
-
2017
- 2017-03-24 CN CN201720303426.3U patent/CN206712466U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111130103A (en) * | 2020-01-06 | 2020-05-08 | 国网浙江省电力有限公司电力科学研究院 | Method for setting running gear of generator and phase modulator step-up transformer |
| CN111130103B (en) * | 2020-01-06 | 2021-07-06 | 国网浙江省电力有限公司电力科学研究院 | Method for setting running gear of generator and phase modulator step-up transformer |
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