CN205791518U - A kind of low pressure long distance power transmission system - Google Patents
A kind of low pressure long distance power transmission system Download PDFInfo
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- CN205791518U CN205791518U CN201620472814.XU CN201620472814U CN205791518U CN 205791518 U CN205791518 U CN 205791518U CN 201620472814 U CN201620472814 U CN 201620472814U CN 205791518 U CN205791518 U CN 205791518U
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Abstract
This utility model relates to technical field of electric power transmission, a kind of low pressure long distance power transmission system is provided, including for converting input voltage into the first voltage controller meeting low-voltage electricity transmission line required voltage and for being converted to 220V or/and second voltage controller of 380V by meeting low-voltage electricity transmission line required voltage, the outfan of described first voltage controller is connected with the input of described second voltage controller by low-voltage electricity transmission line；When the output end voltage of described second voltage controller is single-phase 380V, the outfan of described second voltage controller connects to have and single-phase turns three-phase 380V electric pressure converter, thus realize stablizing the voltage on low-voltage electricity transmission line, add the fed distance of 380V/220V low voltage electric network voltage, reduce the loss of transmission line of electricity, meet the utilization voltage demand of user.
Description
Technical field
This utility model belongs to technical field of electric power transmission, particularly relates to a kind of low pressure long distance power transmission system.
Background technology
The stabilization of power grids and the safe operation of power equipment, line loss and living standard of urban and rural population are used by quality of voltage
Electricity all has a direct impact.Along with rapid development of economy, rural households resident buy substantial amounts of household electrical appliance with
And the motor machine such as drainage and irrigation hyelectric power motor-pumped well, cause farming power throwing-on.
Due to China rural area and outlying poverty-stricken area, vast in territory, population density is low, and power load is relatively
For dispersion, capacity is relatively low, therefore there is the substantial amounts of low-voltage supply line more than 500 meters of supply districts, presses
According to current supply standard, using single-phase 220V or three-phase 380V to power, its line loss is relatively big, causes
User power utilization terminal voltage is too low, and having a strong impact on the daily electricity consumption of motor machine, cultivation, well irrigation and the masses needs
Ask.
Utility model content
The purpose of this utility model is to provide a kind of low pressure long distance power transmission system, it is intended to solve prior art
Middle power supply distance is more than the low-voltage supply line of 500 meters of supply districts, and its line loss is relatively big, causes user
Electricity consumption terminal voltage is too low, has a strong impact on the daily need for electricity of motor machine, cultivation, well irrigation and the masses
Problem.
This utility model is achieved in that a kind of low pressure long distance power transmission system, described low pressure remote conveying
Electricity system includes for converting input voltage into the first Control of Voltage meeting low-voltage electricity transmission line required voltage
Device and for being converted to 220V or/and the second voltage control of 380V by meeting low-voltage electricity transmission line required voltage
Device processed, the outfan of described first voltage controller is by low-voltage electricity transmission line and described second voltage controller
Input connect；
When the output end voltage of described second voltage controller is single-phase 380V, described second voltage controller
Outfan connect to have and single-phase turn three-phase 380V electric pressure converter.
As a kind of improved plan, the outfan of described second voltage controller connects voltage compensator.
As a kind of improved plan, described voltage compensator includes single-chip microcomputer, bucking coil, power supply voltage stabilizing
Circuit and contactor control circuit, wherein:
Described single-chip microcomputer is connected with described power supply stabilization circuit, contactor control circuit respectively, and described power supply is steady
Volt circuit is connected with input phase line；
Described bucking coil includes main coil, the first secondary coil and the second secondary coil, described main coil input
Connecting described input phase line, described main coil outfan connects output phase line, described first secondary coil input
Connecting described input phase line, outfan connects zero line, and the second secondary coil input connects described input phase line,
Outfan connects zero line, and described first secondary coil connects one end of input phase line and is provided with the first catalyst, described
Second secondary coil connects one end of input phase line and is provided with the second catalyst；
Described contactor control circuit is connected with described first catalyst, the second catalyst respectively.
As a kind of improved plan, described single-phase turn three-phase 380V electric pressure converter, including control circuit and
By the inverter that current inversion is three-phase 380V alternating current power supply, described control circuit electrically connects with described inverter,
The input of described inverter is provided with ac input end mouth and 0V input port, and the outfan of described inverter divides
Be not provided with 380V exchange A phase output terminal mouth, 380V alternating-current B phase output terminal mouth exchanges C phase and exports with 380V
Port；
Described inverter includes the first inverter circuit, the second inversion electricity electrically connected respectively with described control circuit
Road and the 3rd inverter circuit, wherein, described first inverter circuit, the second inverter circuit and the 3rd inversion
Circuit is connected with described ac input end mouth, 0V input port respectively, described first inverter circuit and described 380V
Exchange A phase output terminal mouth electrical connection, described second inverter circuit is electrically connected with described 380V alternating-current B output port
Connecing, described 3rd inverter circuit exchanges the electrical connection of C phase output terminal mouth with described 380V.
As a kind of improved plan, described first inverter circuit, the second inverter circuit and the 3rd inversion electricity
Road all includes the first Intelligent power module circuit and the second Intelligent power module circuit being cascaded；
Between first Intelligent power module circuit and second Intelligent power module circuit of described first inverter circuit
The connection that line is drawn exchanges A phase output terminal mouth to described 380V；
Between first Intelligent power module circuit and second Intelligent power module circuit of described second inverter circuit
The connection that line is drawn is to described 380V alternating-current B phase output terminal mouth；
Between first Intelligent power module circuit and second Intelligent power module circuit of described 3rd inverter circuit
The connection that line is drawn exchanges C phase output terminal mouth to described 380V.
As a kind of improved plan, described first Intelligent power module circuit and the second SPM electricity
Road all includes igbt and crystal diode, wherein:
The grid of described igbt electrically connects with described control circuit, described first intelligent power
The colelctor electrode of the igbt of modular circuit respectively with negative terminal, the institute of described crystal diode
The emitter stage of the igbt stating the second Intelligent power module circuit connects, described first intelligence merit
The emitter stage of the igbt of rate modular circuit electrically connects with described 0V input port, and described second
The colelctor electrode of the igbt of Intelligent power module circuit electrically connects with described ac input end mouth；
The positive terminal of the crystal diode of described first Intelligent power module circuit and described 0V input port electricity
Connect, the negative terminal of the crystal diode of described second Intelligent power module circuit and described ac input end
Mouth electrical connection；
The colelctor electrode of the igbt of described first Intelligent power module circuit and described second intelligence
The connection that line between the emitter stage of the igbt of power module circuit is drawn is to described
380V exchanges A phase output terminal mouth, or 380V alternating-current B phase output terminal mouth, or 380V exchanges C phase output terminal
Mouthful.
As a kind of improved plan, described single-phase turn three-phase 380V electric pressure converter also include rectification circuit,
Filter circuit, auxiliary power circuit and alternating current correction circuit, wherein:
Described rectification circuit is connected to the front end of described inverter, and respectively with described ac input end mouth, 0V
Input port connects；
Described filter circuit at the two ends of described rectification circuit；
Described auxiliary power circuit is connected with described rectification circuit and described control circuit；
The input of described alternating current correction circuit is connected with described inverter, and outfan divides three tunnels to connect respectively
Defeated to described 380V exchange A phase output terminal mouth, 380V alternating-current B phase output terminal mouth and 380V exchange C phase
Go out port.
As a kind of improved plan, described first voltage controller and the second voltage-controlled structure are identical,
Its specifically include at least one first coil being positioned at the first voltage side be positioned at relative with described first voltage side
At least one second coil of the second voltage side answered, described first coil includes two or three first connections
End, described second coil includes that at least two second connects end；
When described first connect end as input time, described second connect end as outfan, described low pressure
Transformator used for transmission line is booster transformer or step-down transformer；
When described first connect end as outfan time, described second connect end as input, described low pressure
Transformator used for transmission line is step-down transformer.
Meeting low-voltage electricity transmission line required voltage scope as a kind of improved plan is 1100V-6000V；Described
The input voltage of the first voltage controller is single-phase 220V, or three-phase 380V, or single-phase 10KV, or three-phase
10KV。
In this utility model, low pressure long distance power transmission system include for convert input voltage into meet low
First voltage controller of pressure transmission line required voltage and for low-voltage electricity transmission line required voltage will be met
Being converted to 220V or/and second voltage controller of 380V, the outfan of described first voltage controller passes through
Low-voltage electricity transmission line is connected with the input of described second voltage controller；When described second voltage controller
When output end voltage is single-phase 380V, the outfan of described second voltage controller connects to have and single-phase turns three-phase
380V electric pressure converter, thus realize stablizing of the voltage on centering low-voltage electricity transmission line, add
The fed distance of 380V/220V low voltage electric network voltage, reduces the loss of transmission line of electricity, meets the electricity consumption of user
Voltage requirements.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the low pressure long distance power transmission system that this utility model embodiment one provides；
Fig. 2 is the structured flowchart of the low pressure long distance power transmission system that this utility model embodiment two provides；
Fig. 3 is the structured flowchart of the low pressure long distance power transmission system that this utility model embodiment three provides；
Fig. 4 is the structured flowchart of the low pressure long distance power transmission system that this utility model embodiment four provides；
Fig. 5 is the structure principle chart of the voltage compensator 5 that this utility model provides；
Fig. 6 is the flowchart of the voltage compensating method that this utility model provides；
Fig. 7 is the single-phase structured flowchart turning three-phase voltage transducer that this utility model provides；
Fig. 8 is the single-phase fundamental diagram turning three-phase 380V electric pressure converter 4 that this utility model provides；
Fig. 9 is the first voltage controller 1 of providing of this utility model and the structure of the second voltage controller 3 is shown
It is intended to；
Figure 10 is the structured flowchart of the first voltage controller 1 that this utility model embodiment one provides；
Figure 11 is the structured flowchart of the second voltage controller 3 that this utility model embodiment one provides；
Figure 12 is the structured flowchart of the first voltage controller 1 that this utility model embodiment two provides；
Figure 13 is the structured flowchart of the first voltage controller 1 that this utility model embodiment three provides；
Figure 14 is the structured flowchart of the second voltage controller 3 that this utility model embodiment two provides；
Wherein, 1-the first voltage controller, 2-low-voltage electricity transmission line, 3-the second voltage controller, 4-is single-phase
Turn three-phase 380V electric pressure converter, 5-voltage compensator, 6-single-chip microcomputer, 7-bucking coil, 8-power supply voltage stabilizing
Circuit, 9-contactor control circuit, 10-main coil, 11-the first secondary coil, 12-the second secondary coil, 13-
Input phase line, 14-zero line, 15-the first catalyst, 16-the second catalyst, 17-the first rectification circuit, 18-
Mu balanced circuit, 19-sampled signal comparing module, 20-computing module, 21-signal output module, 22-powers on
Delay circuit, 23-the 3rd catalyst, 24-overvoltage crowbar, 25-the 4th catalyst, 26-exports phase line,
27-control circuit, 28-inverter, 29-ac input end mouth, 30-0V input port, 31-380V exchanges A
Phase output terminal mouth, 32-380V alternating-current B phase output terminal mouth, 33-380V exchanges C phase output terminal mouth, 34-
One inverter circuit, 35-the second inverter circuit, 36-the 3rd inverter circuit, 37-the first Intelligent power module circuit,
38-the second Intelligent power module circuit, 39-igbt, 40-crystal diode, 41-second
Rectification circuit, 42-filter circuit, 43-electric capacity, 44-auxiliary power circuit, 45-alternating current correction circuit,
46-first coil, 47-the second coil, 48-0V input, 49-220V input, 50-0V outfan,
51-660V outfan, 52-880V outfan, 53-1100V outfan, 54-2200V outfan, 55-5500V
Outfan, 56-220V outfan, 57-380V outfan, 58-660V input, 59-880V input,
60-1100V input, 61-2200V input, 62-5500V input, 63-10KV input, 64-A
Phase input coil, 65-B phase input coil, 66-C phase input coil, 67-A phase output winding, 68-B phase
Output winding, 69-C phase output winding.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing
And embodiment, this utility model is further elaborated.Should be appreciated that described herein specifically
Embodiment, only in order to explain this utility model, is not used to limit this utility model.
As shown in Figures 1 to 4, low pressure long distance power transmission system includes meeting for converting input voltage into
First voltage controller 1 of low-voltage electricity transmission line 2 required voltage and for low-voltage electricity transmission line 2 will be met
Required voltage is converted to 220V or/and second voltage controller 3 of 380V, the first voltage controller 1 defeated
Go out end to be connected by the input of low-voltage electricity transmission line and the second voltage controller 3；
When the output end voltage of the second voltage controller 3 is single-phase 380V, the second voltage controller 3 defeated
Go out to hold connection to have and single-phase turn three-phase 380V electric pressure converter 4.
Wherein, above-mentioned meet low-voltage electricity transmission line 2 required for voltage range be 1100V-6000V, i.e. by the
One voltage controller 1 converts voltages in the range of 1100V-6000V, enterprising at low-voltage electricity transmission line 2
Row conveying, arrives user side；
The input voltage of the first voltage controller 1 is single-phase 220V, or three-phase 380V, or single-phase 10KV, or
Three-phase 10KV.
As it is shown in figure 1, input voltage is single-phase 220V, the first voltage controller 1 is booster transformer, should
Voltage is promoted in the range of 1100V-6000V from 220V by booster transformer, such as 2200V (institute in figure
Show), it is then passed through low-voltage electricity transmission line 2 and is transported to the second voltage controller 3, this second Control of Voltage
Device 3 is step-down transformer, this second voltage controller 3 by the most single-phase for the voltage drop of 2200V 220V or
Single-phase 380V；
Now, in this low pressure long distance power transmission system, include several the second voltage controllers 3, second
Voltage controller 3 will meet low-voltage electricity transmission line 2 required voltage and be converted to single-phase 220V or/and single-phase 380V,
Wherein, it is also possible to be separately provided one, the most independent single-phase 220V, for user's daily life electricity consumption, or individually
Single-phase 380V, converted for electricity consumptions such as agricultural irrigation motor-pumped wells, do not repeat them here.
Now, in the low pressure long distance power transmission system shown in this Fig. 1, when the second voltage controller 3 exports
Voltage when being single-phase 380V, now, this low pressure long distance power transmission system also includes that one single-phase turns three-phase 380V
Electric pressure converter 4, following have detailed content to be described this single-phase three-phase 380V electric pressure converter 4 that turns,
Do not repeat them here；
Further, when the second voltage controller 3 converts voltages into single-phase 220V, now the second voltage
The outfan of controller 3 also includes a voltage compensator 5, the most following record of structure of this voltage compensator 5,
Do not repeat them here；
Wherein, in this embodiment, this low-voltage electricity transmission line 2 is two-wire transmission line of electricity.
As in figure 2 it is shown, input voltage is three-phase 380V, the first voltage controller 1 is booster transformer, should
Voltage is promoted in the range of 1100V-6000V from 380V by booster transformer, such as 2200V, then warp
Crossing low-voltage electricity transmission line 2 and be transported to the second voltage controller 3, this i.e. blood pressure lowering of the second voltage controller 3 becomes
Depressor, this second voltage controller 3 is by the voltage drop of 2200V as little as three-phase 380V；
Now, in this low pressure long distance power transmission system, include several the second voltage controllers 3, i.e.
Two voltage controllers 3 will meet low-voltage electricity transmission line 2 required voltage and be converted to three-phase 380V, this second voltage
Controller 3 end is directly connected to user side electrical equipment；
Further, when the second voltage controller 3 converts voltages into three-phase 380V, now the second voltage
The outfan of controller 3 also includes a voltage compensator 5, the most following record of structure of this voltage compensator 5,
Do not repeat them here.
Wherein, in this embodiment, this low-voltage electricity transmission line 2 is three line transmission lines of electricity.
As it is shown on figure 3, input voltage is single-phase 10KV, the first voltage controller 1 is step-down transformer, should
Voltage is down in the range of 1100V-6000V from 10KV by step-down transformer, such as 2200V, is then passed through
Low-voltage electricity transmission line 2 is transported to the second voltage controller 3, and this second voltage controller 3 is blood pressure lowering and becomes
Depressor, this second voltage controller 3 is by the most single-phase for the voltage drop of 2200V 220V or single-phase 380V；
Now, in this low pressure long distance power transmission system, include several the second voltage controllers 3, second
Voltage controller 3 will meet low-voltage electricity transmission line 2 required voltage and be converted to single-phase 220V or/and single-phase 380V,
Wherein, it is also possible to be separately provided one, the most independent single-phase 220V, for user's daily life electricity consumption, or individually
Single-phase 380V, converted for electricity consumptions such as agricultural irrigation motor-pumped wells, do not repeat them here.
Now, in the low pressure long distance power transmission system shown in this Fig. 1, when the second voltage controller 3 exports
Voltage when being single-phase 380V, now, this low pressure long distance power transmission system also includes that one single-phase turns three-phase 380V
Electric pressure converter 4, following have detailed content to be described this single-phase three-phase 380V electric pressure converter 4 that turns,
Do not repeat them here；
Further, when the second voltage controller 3 converts voltages into single-phase 220V, now the second voltage
The outfan of controller 3 also includes a voltage compensator 5, the most following record of structure of this voltage compensator 5,
Do not repeat them here；
Wherein, in this embodiment, this low-voltage electricity transmission line 2 is two-wire transmission line of electricity.
As shown in Figure 4, input voltage is three-phase 10KV, and the first voltage controller 1 is step-down transformer, should
Voltage is down in the range of 1100V-6000V from 10KV by step-down transformer, such as 2200V, is then passed through
Low-voltage electricity transmission line 2 is transported to the second voltage controller 3, this second voltage controller 3 i.e. downconverter
Device, this second voltage controller 3 is by the voltage drop of 2200V as little as three-phase 380V；
Now, in this low pressure long distance power transmission system, include several the second voltage controllers 3, i.e.
Two voltage controllers 3 will meet low-voltage electricity transmission line 2 required voltage and be converted to three-phase 380V, this second voltage
Controller 3 end is directly connected to user side electrical equipment；
Further, when the second voltage controller 3 converts voltages into three-phase 380V, now the second voltage
The outfan of controller 3 also includes a voltage compensator 5, the most following record of structure of this voltage compensator 5,
Do not repeat them here.
Wherein, in this embodiment, this low-voltage electricity transmission line 2 is three line transmission lines of electricity.
In this utility model embodiment, as it is shown in figure 5, voltage compensator 5 includes single-chip microcomputer 6, compensating line
Circle 7, power supply stabilization circuit 8 and contactor control circuit 9, wherein:
Single-chip microcomputer 6 is connected with power supply stabilization circuit 8, contactor control circuit 9 respectively, power supply stabilization circuit 8
It is connected with input phase line 13；
Bucking coil 7 includes main coil the 10, first secondary coil 11 and the second secondary coil 12, and main coil 10 is defeated
Entering end and connect input phase line 13, main coil 10 outfan connects output phase line 26, and the first secondary coil 11 inputs
End connects input phase line 13, and outfan connects zero line 14, and the second secondary coil 12 input connects input phase line
13, outfan connects zero line 14, and the first secondary coil 11 connects one end of input phase line 13 and is provided with the first contact
Device 15, the second secondary coil 12 connects one end of input phase line 13 and is provided with the second catalyst 16；
Contactor control circuit 9 is connected with first catalyst the 15, second catalyst 16 respectively, for according to list
The voltage compensation signal of sheet machine 6 output, controls the first catalyst 15 and closing time of the second catalyst 16.
Wherein, this first secondary coil 11 and the second secondary coil 12 are mainly used in when energising, for above-mentioned main line
Circle 10 offer voltage compensation, the voltage in input phase line 13 is compensated by main coil 10 automatically, and following have
Concrete example illustrates, and does not repeats them here.
In this utility model embodiment, as it is shown in figure 5, power supply stabilization circuit 8 is mainly used in input phase
Voltage on line 13 carries out sampling sampling, then analyzes and generates voltage compensation signal, is single-chip microcomputer 6 etc. simultaneously
Electricity consumption device is powered, and wherein, this power supply stabilization circuit 8 includes the first rectification circuit 17 and mu balanced circuit
18, wherein, the first rectification circuit 17 is connected with input phase line 13, the first rectification circuit 17 and mu balanced circuit
18 are connected with single-chip microcomputer 6 respectively；
After the voltage signal of input phase line 13 is carried out rectifying and wave-filtering by this first rectification circuit 17, a road provides
To single-chip microcomputer 6 as voltage compensation signal, another road, after mu balanced circuit 18, powers for single-chip microcomputer 6,
This repeats no more.
Further, as it is shown in figure 5, single-chip microcomputer 6 includes sampled signal comparing module 19, computing module 20
With signal output module 21, wherein, computing module 20 respectively with signal fusing module and signal output module
21 connect；
This sampled signal comparing module 19 is connected with above-mentioned first rectification circuit 17, is mainly used in mending voltage
Repay signal to compare, it is judged that determine that being currently entered phase line 13 is input to the voltage of main coil 10, from
And generated the voltage parameter needing to compensate by computing module 20, and arrived by signal output module 21 output
On contactor control circuit 9.
In this utility model embodiment, voltage compensator 5 also includes power-up time delay circuit 22, and this powers on and prolongs
Time circuit 22 be connected with single-chip microcomputer 6, the output phase line 26 of main coil 10 outfan is provided with the 3rd catalyst
23, the 3rd catalyst 23 is connected with power-up time delay circuit 22；
Wherein, when this power-up time delay circuit 22 is mainly used in preventing energising from starting, single-chip microcomputer 6 exports malfunction and refers to
Order, causes Wrong control, and this delay time could be arranged to 5 to 15 seconds, and the i.e. the 3rd catalyst 23 is in
Off-state, when delay time arrives, then closes this catalyst, and single-chip microcomputer 6 controls electricity for catalyst
The control on road 9 is just effective.
In this utility model embodiment, voltage compensator 5 also includes overvoltage crowbar 24, and this overvoltage is protected
Protection circuit 24 is connected with the signal output module 21 of single-chip microcomputer 6 respectively, the output phase of main coil 10 outfan
Being additionally provided with the 4th catalyst 25 on line 26, the 4th catalyst 25 is connected with overvoltage crowbar 24；
The voltage i.e. exported when the signal output module 21 of single-chip microcomputer 6 is higher than overvoltage protection threshold set in advance
During value, then control to disconnect the 4th catalyst 25, protect whole voltage compensator 5, and residential electricity consumption equipment
Safety, this overvoltage protection threshold value set in advance can be carried out such as according to the actual needs, such as with
As a example by 220V normal voltage, this overvoltage protection threshold value could be arranged to 240V.
Wherein, above-mentioned mu balanced circuit 18 is the most respectively with this power-up time delay circuit 22, overvoltage crowbar 24 the most even
Connect, be powered for both.
Fig. 6 shows the voltage compensation side based on the voltage compensator 5 shown in Fig. 5 that this utility model provides
The flowchart of method, it specifically includes following step:
In step S101, the ac voltage signal in input phase line 13 is adopted by power supply stabilization circuit 8
Collection, performs rectifying action, provides supply voltage for single-chip microcomputer 6 simultaneously, and obtain voltage compensation signal.
In step s 102, single-chip microcomputer 6 carries out signal fusing to voltage compensation signal, calculates voltage compensation ginseng
Count, and raw corresponding voltage compensation signal flows to contactor control circuit 9.
In step s 103, contactor control circuit 9 controls the first catalyst 15 according to voltage compensation signal
Or second catalyst 16 close, control the first secondary coil 11 or main coil 10 carried out by the second secondary coil 12
Voltage compensation.
Wherein, when single-chip microcomputer 6 is energized work, power-up time delay circuit 22 timing closing the 3rd catalyst 23；
When single-chip microcomputer 6 calculated voltage compensation parameter is more than overvoltage protection threshold value set in advance,
Overvoltage crowbar 24 controls to open the 4th catalyst 25, disconnects output phase line 26.
In order to make it easy to understand, the embodiment shown in above-mentioned Fig. 5 and Fig. 6 of following combination, carry out example explanation:
With input phase line 13 normal voltage as 220V as a example by illustrate；
Setting the first secondary coil 11 is to compensate 15V alternating voltage in the same direction, i.e. when the input electricity of input phase line 13
Force down when 205V, then under the control of single-chip microcomputer 6 and contactor control circuit 9, the first secondary coil 11
The first corresponding catalyst 15 starts Guan Bi, and the first secondary coil 11 is energized, and the first secondary coil 11 produces 15V
Alternating voltage in the same direction, the 15V alternating voltage in the same direction that main coil 10 produces according to the first secondary coil 11, will
Input voltage compensation is 205+15=220V, and now, the second catalyst 16 is off；
Setting the second secondary coil 12 is to compensate 10V Opposed crossing voltage, i.e. when the input electricity of input phase line 13
When pressure is higher than 230V, the most then under the control of single-chip microcomputer 6 and contactor control circuit 9, the second secondary coil
Second catalyst 16 of 12 correspondences starts Guan Bi, and the second secondary coil 12 is energized, and the second secondary coil 12 produces
The Opposed crossing voltage of 10V, the 10V Opposed crossing voltage that main coil 10 produces according to the second secondary coil 12,
It is 230-10=220V by input voltage compensation, now, owing to the input voltage of input phase line 8 is higher than 205V,
First catalyst 15 is off；
When inputting the voltage inputted in phase line 13 and being between 205V-230V, then single-chip microcomputer 6 is without output, the
One catalyst 15 and the second catalyst 16 are in off-state, the first secondary coil 11 and the second secondary coil 12
All Non voltage outputs.
In this utility model embodiment, as it is shown in fig. 7, the single-phase three-phase 380V electric pressure converter 4 that turns includes
Control circuit 27 and by the inverter 28 that current inversion is three-phase 380V alternating current power supply, control circuit 27 is with inverse
Becoming device 28 to electrically connect, the input of inverter 28 is provided with ac input end mouth 29 and 0V input port 30,
The outfan of inverter 28 is respectively equipped with 380V and exchanges A phase output terminal mouth 31,380V alternating-current B phase output terminal
Mouthfuls 32 exchange C phase output terminal mouth 33 with 380V；
Inverter 28 includes first inverter circuit the 34, the second inversion electricity electrically connected respectively with control circuit 27
Road 35 and the 3rd inverter circuit 36, wherein, first inverter circuit the 34, second inverter circuit 35 and
Three inverter circuits 36 are connected with ac input end mouth 29,0V input port 30 respectively, the first inverter circuit 34
Exchange A phase output terminal mouth 31 to electrically connect with 380V, the second inverter circuit 35 and 380V alternating-current B outfan
Mouth electrical connection, the 3rd inverter circuit 36 exchanges C phase output terminal mouth 33 and electrically connects with 380V.
First inverter circuit the 34, second inverter circuit 35 and the 3rd inverter circuit 36 all include being connected on one
The first Intelligent power module circuit 37 and the second Intelligent power module circuit 38 risen；
First Intelligent power module circuit 37 and the second Intelligent power module circuit 38 of the first inverter circuit 34
Between line draw connection to 380V exchange A phase output terminal mouth 31；
First Intelligent power module circuit 37 and the second Intelligent power module circuit 38 of the second inverter circuit 35
Between line draw connection to 380V alternating-current B phase output terminal mouth 32；
First Intelligent power module circuit 37 and the second Intelligent power module circuit 38 of the 3rd inverter circuit 36
Between line draw connection to 380V exchange C phase output terminal mouth 33.
As shown in Figure 8, the first Intelligent power module circuit 37 and the second Intelligent power module circuit 38 all wrap
Include igbt 39 and crystal diode 40, wherein:
The grid of igbt 39 electrically connects with control circuit 27, the first SPM electricity
The colelctor electrode of the igbt 39 on road 37 respectively with the negative terminal of crystal diode 40, second
The emitter stage of the igbt 39 of Intelligent power module circuit 38 connects, the first intelligent power mould
The emitter stage of the igbt 39 of block circuit 37 electrically connects with 0V input port 30, the second intelligence
The colelctor electrode of the igbt 39 of energy power module circuit 38 electrically connects with ac input end mouth 29；
The positive terminal of the crystal diode 40 of the first Intelligent power module circuit 37 and 0V input port 30
Electrical connection, the negative terminal of the crystal diode 40 of the second Intelligent power module circuit 38 and ac input end
Mouth 29 electrical connection；
The colelctor electrode of the igbt 39 of the first Intelligent power module circuit 37 and the second intelligence merit
The connection that line between the emitter stage of the igbt 39 of rate modular circuit 38 is drawn is extremely
380V exchanges A phase output terminal mouth 31, or 380V alternating-current B phase output terminal mouth 32, or 380V exchange C phase is defeated
Go out port 33.
As shown in Figure 7 and Figure 8, this single-phase three-phase 380V electric pressure converter 4 that turns also includes for for inverter
28 the second rectification circuits 41 that DC voltage is provided, the second rectification circuit 41 is connected to the front end of inverter 28,
And be connected with ac input end mouth 29,0V input port 30 respectively.
Wherein, as shown in Figure 8, this second rectification circuit 41 is the full-bridge become by four crystal diodes 40
Rectification circuit, provides the DC source of 500V for this inverter 28, naturally it is also possible to adopt real in other ways
Existing rectification, does not repeats them here.
In this embodiment, the single-phase three-phase 380V electric pressure converter 4 that turns also includes filter circuit 42, filtered electrical
Road 42 at the two ends of the second rectification circuit 41；
Wherein, this filter circuit 42 can be in series by N number of electric capacity 43, and wherein, N is more than or equal to 2,
Fig. 8 is only given the situation that one of which realizes, is certainly also adopted by other filtering modes.
In this utility model, as it is shown in fig. 7, single-phase turn three-phase 380V electric pressure converter 4 also include for
The auxiliary power circuit 44 of input voltage, auxiliary power circuit 44 and the second rectification are provided for control circuit 27
Circuit 41 and control circuit 27 connect, i.e. this auxiliary power circuit 44 is by the second rectification circuit 41 rectification
After input voltage be converted to the DC source required for control circuit 27, do not repeat them here.
As it is shown in fig. 7, the single-phase three-phase 380V electric pressure converter 4 that turns also includes alternating current correction circuit 45, hand over
Stream electricity is revised the input of circuit 45 and is connected with inverter 28, and outfan divides three tunnels to be respectively connecting to 380V friendship
Stream A phase output terminal mouth 31,380V alternating-current B phase output terminal mouth 32 and 380V exchange C phase output terminal mouth 33；
Wherein, this alternating current correction circuit 45 is mainly used in the three-phase 380V alternating current to inverter 28 output
Quality is modified so that it is more meets the demand of user, does not repeats them here.
In this utility model, the input voltage of this ac input end mouth 29 is 380V to 700V, above-mentioned figure
What 1 to Fig. 4 was given is the situation of 380V, does not repeats them here.
In this utility model embodiment, as it is shown in figure 9, the first voltage control shown in Fig. 1 to Fig. 4
Device 1 processed and the second voltage-controlled structure are essentially identical, and it specifically includes and is positioned at least the one of the first voltage side
Individual first coil 46 and at least one second coil being positioned at second voltage side corresponding with the first voltage side
47, first coil 46 includes two or three first connection ends, and the second coil 47 includes at least two second
Connect end；
When first connects end as input, second connects end becomes as outfan, low-voltage electricity transmission line
Depressor is booster transformer or step-down transformer；
When first connects end as outfan, second connects end becomes as input, low-voltage electricity transmission line
Depressor is step-down transformer.
Wherein, this first voltage controller 1 is mainly used between the Voltage Cortrol of input to 660V-5500V
Parameter, be delivered to user side by low-voltage electricity transmission line, then by this second voltage controller 3 by low
The voltage of pressure transmission line drops to 220V or 380V that user needs, or other, and following combination is several concrete
Embodiment illustrates.
As shown in Figure 10, this first voltage controller 1 for booster transformer, and the voltage of the first voltage side
During for single-phase voltage, the quantity of first coil 46 and the second coil 47 is one；
First coil 46 includes that two first connect ends, i.e. 0V input 48 and 220V input 49, the
Two coil 47 second connection end include 0V outfan 50,660V outfan 51,880V outfan 52,
1100V outfan 53,2200V outfan 54 and 5500V outfan 55, wherein, this each outfan
For selecting end, such as, select 0V outfan and 1100V outfan 53.
In this embodiment, i.e. input voltage is that the single-phase voltage of 220V is converted to 660V or 880V, or
1100V or 2200V, or 5500V, be transported on low-voltage electricity transmission line, wherein, this 660V outfan 51,
880V outfan 52,1100V outfan 53,2200V outfan 54 and 5500V outfan 55 conduct
The demand end of low-voltage electricity transmission line, can select according to the distance of actual low-voltage electricity transmission line, with fall
The power consumption of low low-voltage electricity transmission line, improves transmission of electricity quality, does not repeats them here.
As shown in figure 11, relative with single-phase the first voltage controller 1 (booster transformer) shown in Figure 10
Answering, this second voltage controller 3 is step-down transformer, and when the voltage of the first voltage side is single-phase voltage,
The quantity of first coil 46 and the second coil 47 is one；
First coil 46 includes that three first connect end, i.e. 0V outfan, 220V outfan 56 and/or 380V
Outfan 57, the second connection end of the second coil 47 includes 0V input, 660V input 58,880V
Input 59,1100V input 60,2200V input 61 and 5500V input 62.
This step-down transformer is by 660V input 58,880V input 59,1100V input 60,2200V
Input 61 and 5500V input 62 input voltage be converted to single-phase 220V or single-phase 380V or its
He, do not repeat them here.
In this embodiment, shown in the first voltage controller 1 (booster transformer) shown in Figure 10 and Figure 11
The second voltage controller 3 (step-down transformer) can arrange in pairs or groups use, be separately positioned on low-voltage electricity transmission line 2
Two ends, complete the remote mesolow transmission of electricity more than 500 meters of the coverage radius, its framework such as Fig. 1 institute
The low pressure long distance power transmission system shown.
As shown in figure 12, when the first voltage controller 1 is step-down transformer, and the voltage of the first voltage side is
During single-phase voltage, the quantity of first coil 46 and the second coil 47 is one；
First coil 46 includes that two first connect end, i.e. 0V input and 10KV input 63, the second line
Second connection end of circle 47 includes that 0V outfan, 660V outfan 51,880V outfan 52,1100V are defeated
Go out end 53,2200V outfan 54 and 5500V outfan 55.
In this embodiment, i.e. input voltage is that the single-phase voltage of 10KV is converted to 660V or 880V, or
1100V or 2200V, or 5500V, be transported on low-voltage electricity transmission line, wherein, this 660V outfan 51,
880V outfan 52,1100V outfan 53,2200V outfan 54 and 5500V outfan 55 conduct
The demand end of low-voltage electricity transmission line, can select according to the distance of actual low-voltage electricity transmission line, with fall
The power consumption of low low-voltage electricity transmission line, improves transmission of electricity quality, does not repeats them here.
Corresponding the first voltage controller 1 (step-down transformer) shown in Figure 12, at low-voltage electricity transmission line 2
Rear end can use the step-down transformer shown in Figure 11, i.e. Figure 12 and Figure 11 collocation to carry out low voltage power transmission, its
Framework low pressure long distance power transmission system as shown in Figure 3, does not repeats them here.
As shown in figure 13, when the first voltage controller 1 is booster transformer, and the voltage of the first voltage side is
During three-phase voltage, first coil 46 includes that A phase input coil 64, B phase input coil 65 and C phase are defeated
Entering coil 66, the second coil 47 includes that A phase output winding 67, B phase output winding 68 and C phase export
Coil 69；
Second connection end of each second coil 47 includes that 0V outfan, 660V outfan 51,880V export
End 52,1100V outfan 53,2200V outfan 54 and 5500V outfan 55.
This embodiment is that the transformation for three-phase alternating current processes, and it is respectively equipped with three groups of first coils 46 and three groups
The second corresponding coil 47, its principle is identical, does not repeats them here.
Corresponding, when the input voltage of the first coil 46 shown in above-mentioned Figure 13 is 380V, such as Figure 14
Shown in, when low-voltage electricity transmission line transformator is step-down transformer, and the voltage of the first voltage side is three-phase electricity
During pressure, first coil 46 includes A phase output winding 67, B phase output winding 68 and C phase output winding
69, the second coil 47 includes A phase input coil 64, B phase input coil 65 and C phase input coil 66；
Second connection end of each second coil 47 includes that 0V input, 660V input 58,880V input
End 59,1100V input 60,2200V input 61 and 5500V input 62.
The boosting that i.e. Figure 13 and Figure 14 collocation completes three-phase 380V voltage by low-voltage electricity transmission line carries, and carries
High transmission of electricity quality, reduces the power consumption of low-voltage electricity transmission line.
Corresponding, when the input voltage of the first coil 46 shown in above-mentioned Figure 13 is 10KV, when low pressure is defeated
Electric line transformator is step-down transformer, and when the voltage of the first voltage side is three-phase voltage, first coil
46 include A phase input coil 64, B phase input coil 65 and C phase input coil 66, described second line
Circle includes A phase output winding 67, B phase output winding 68 and C phase output winding 69；
Second connection end of each second coil 2 includes that 0V outfan 50,660V outfan 51,880V are defeated
Go out end 52,1100V outfan 53,2200V outfan 54 and 5500V outfan 55.
Corresponding low-voltage electricity transmission line transformator shown in Figure 13, the low-voltage electricity transmission line being arranged on rear end becomes
Depressor is similarly step-down transformer as shown in figure 14, and its structure and principle ibid, do not repeat them here.
The combination of i.e. Figure 13 and Figure 14, can complete the blood pressure lowering of three-phase 10KV voltage by low-voltage electricity transmission line
Conveying, improves transmission of electricity quality, reduces the power consumption of low-voltage electricity transmission line.
In this utility model embodiment, the electric current of the first voltage side and the second voltage side is alternating current.
Having above-mentioned understanding, the low pressure long distance power transmission system that this utility model provides has the following technical effect that
(1) by the first voltage controller, transmission voltage is improved, after voltage improves, reduce low pressure
The transmission current of transmission line of electricity, improves 380V/220V low voltage electric network transmission distance, it is achieved 220V/380V electricity
Remote (more than 500 meters) the qualified conveying of pressure, can reduce line loss power more than 20 times simultaneously；
(2) the line footpath of mesolow transmission line of electricity and transmission facility all can reduce, and saves Master Cost；
(3) insulation standard of whole low pressure long distance power transmission system is low, and construction cost is low, easily safeguards, and
And the electric pressure of low pressure long distance power transmission system is low, do not easily cause the thing such as personal injury, equipment high-voltage breakdown
Therefore；
(4) whole low pressure long distance power transmission system need not extend 10KV circuit, it is not necessary to increases distribution and becomes
Depressor, effectively solves the low problem of rural power grids terminal voltage, saves circuit and equipment investment；
(5) low pressure long distance power transmission system is that power supply department saves a large amount of human and material resources, reduces the upgrading of rural power grids
Investment, provides the user stable power supply simultaneously.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model,
All any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, all should
Within being included in protection domain of the present utility model.
Claims (9)
1. a low pressure long distance power transmission system, it is characterised in that described low pressure long distance power transmission system includes
For convert input voltage into the first voltage controller meeting low-voltage electricity transmission line required voltage and for
220V is converted to or/and second voltage controller of 380V by meeting low-voltage electricity transmission line required voltage, described
The outfan of the first voltage controller is connected by the input of low-voltage electricity transmission line with described second voltage controller
Connect；
When the output end voltage of described second voltage controller is single-phase 380V, described second voltage controller
Outfan connect to have and single-phase turn three-phase 380V electric pressure converter.
Low pressure long distance power transmission system the most according to claim 1, it is characterised in that described second electricity
The outfan of pressure controller connects voltage compensator.
Low pressure long distance power transmission system the most according to claim 2, it is characterised in that described voltage is mended
Repay device and include single-chip microcomputer, bucking coil, power supply stabilization circuit and contactor control circuit, wherein:
Described single-chip microcomputer is connected with described power supply stabilization circuit, contactor control circuit respectively, and described power supply is steady
Volt circuit is connected with input phase line；
Described bucking coil includes main coil, the first secondary coil and the second secondary coil, described main coil input
Connecting described input phase line, described main coil outfan connects output phase line, described first secondary coil input
Connecting described input phase line, outfan connects zero line, and the second secondary coil input connects described input phase line,
Outfan connects zero line, and described first secondary coil connects one end of input phase line and is provided with the first catalyst, described
Second secondary coil connects one end of input phase line and is provided with the second catalyst；
Described contactor control circuit is connected with described first catalyst, the second catalyst respectively.
Low pressure long distance power transmission system the most according to claim 1, it is characterised in that described single-phase turn
Three-phase 380V electric pressure converter, is the inverse of three-phase 380V alternating current power supply including control circuit with by current inversion
Becoming device, described control circuit electrically connects with described inverter, and the input of described inverter is provided with exchange input
Port and 0V input port, the outfan of described inverter be respectively equipped with 380V exchange A phase output terminal mouth,
380V alternating-current B phase output terminal mouth exchanges C phase output terminal mouth with 380V；
Described inverter includes the first inverter circuit, the second inversion electricity electrically connected respectively with described control circuit
Road and the 3rd inverter circuit, wherein, described first inverter circuit, the second inverter circuit and the 3rd inversion
Circuit is connected with described ac input end mouth, 0V input port respectively, described first inverter circuit and described 380V
Exchange A phase output terminal mouth electrical connection, described second inverter circuit is electrically connected with described 380V alternating-current B output port
Connecing, described 3rd inverter circuit exchanges the electrical connection of C phase output terminal mouth with described 380V.
Low pressure long distance power transmission system the most according to claim 4, it is characterised in that described first inverse
Power transformation road, the second inverter circuit and the 3rd inverter circuit all include the first intelligent power mould being cascaded
Block circuit and the second Intelligent power module circuit；
Between first Intelligent power module circuit and second Intelligent power module circuit of described first inverter circuit
The connection that line is drawn exchanges A phase output terminal mouth to described 380V；
Between first Intelligent power module circuit and second Intelligent power module circuit of described second inverter circuit
The connection that line is drawn is to described 380V alternating-current B phase output terminal mouth；
Between first Intelligent power module circuit and second Intelligent power module circuit of described 3rd inverter circuit
The connection that line is drawn exchanges C phase output terminal mouth to described 380V.
The most according to claim 5 single-phase turn three-phase 380V electric pressure converter, it is characterised in that institute
State the first Intelligent power module circuit and the second Intelligent power module circuit all include igbt and
Crystal diode, wherein:
The grid of described igbt electrically connects with described control circuit, described first intelligent power
The colelctor electrode of the igbt of modular circuit respectively with negative terminal, the institute of described crystal diode
The emitter stage of the igbt stating the second Intelligent power module circuit connects, described first intelligence merit
The emitter stage of the igbt of rate modular circuit electrically connects with described 0V input port, and described second
The colelctor electrode of the igbt of Intelligent power module circuit electrically connects with described ac input end mouth；
The positive terminal of the crystal diode of described first Intelligent power module circuit and described 0V input port electricity
Connect, the negative terminal of the crystal diode of described second Intelligent power module circuit and described ac input end
Mouth electrical connection；
The colelctor electrode of the igbt of described first Intelligent power module circuit and described second intelligence
The connection that line between the emitter stage of the igbt of power module circuit is drawn is to described
380V exchanges A phase output terminal mouth, or 380V alternating-current B phase output terminal mouth, or 380V exchanges C phase output terminal
Mouthful.
Low pressure long distance power transmission system the most according to claim 6, it is characterised in that described single-phase turn
Three-phase 380V electric pressure converter also includes rectification circuit, filter circuit, auxiliary power circuit and alternating current correction
Circuit, wherein:
Described rectification circuit is connected to the front end of described inverter, and respectively with described ac input end mouth, 0V
Input port connects；
Described filter circuit at the two ends of described rectification circuit；
Described auxiliary power circuit is connected with described rectification circuit and described control circuit；
The input of described alternating current correction circuit is connected with described inverter, and outfan divides three tunnels to connect respectively
Defeated to described 380V exchange A phase output terminal mouth, 380V alternating-current B phase output terminal mouth and 380V exchange C phase
Go out port.
Low pressure long distance power transmission system the most according to claim 1, it is characterised in that described first electricity
Pressure controller and the second voltage-controlled structure are identical, and it specifically includes at least one being positioned at the first voltage side
First coil and at least one second coil being positioned at second voltage side corresponding with described first voltage side,
Described first coil includes two or three first connection ends, and described second coil includes at least two second even
Connect end；
When described first connect end as input time, described second connect end as outfan, described low pressure
Transformator used for transmission line is booster transformer or step-down transformer；
When described first connect end as outfan time, described second connect end as input, described low pressure
Transformator used for transmission line is step-down transformer.
9. according to the low pressure long distance power transmission system described in any one of claim 1 to 8, it is characterised in that
Meeting low-voltage electricity transmission line required voltage scope is 1100V-6000V；The input electricity of described first voltage controller
Pressure is single-phase 220V, or three-phase 380V, or single-phase 10KV, or three-phase 10KV.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620472814.XU CN205791518U (en) | 2016-05-20 | 2016-05-20 | A kind of low pressure long distance power transmission system |
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| CN201620472814.XU CN205791518U (en) | 2016-05-20 | 2016-05-20 | A kind of low pressure long distance power transmission system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790268A (en) * | 2016-05-20 | 2016-07-20 | 李建新 | Low-voltage and long-distance power transmission system |
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2016
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790268A (en) * | 2016-05-20 | 2016-07-20 | 李建新 | Low-voltage and long-distance power transmission system |
| CN105790268B (en) * | 2016-05-20 | 2019-06-14 | 李建新 | A kind of low pressure remote conveying electric system |
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