CN108448584A - Medial ＆ Low Voltage Power Network remote conveying electric system - Google Patents
Medial ＆ Low Voltage Power Network remote conveying electric system Download PDFInfo
- Publication number
- CN108448584A CN108448584A CN201810170050.2A CN201810170050A CN108448584A CN 108448584 A CN108448584 A CN 108448584A CN 201810170050 A CN201810170050 A CN 201810170050A CN 108448584 A CN108448584 A CN 108448584A
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- China
- Prior art keywords
- electric power
- medial
- power
- low voltage
- ac380v
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
Abstract
The present invention relates to a kind of Medial ＆ Low Voltage Power Network remote conveying electric systems, it includes the stage transformer for carrying out boost or depressurization operation to input electric power, electric power after boost or depressurization is delivered to user terminal via transmission line of electricity, user terminal is respectively set two secondary transformers and carries out buck or boost to electric power, generates AC380V electric power and/or AC220V electric power and is conveyed to user.The present invention has the advantages that powered stable is reliable, at low cost and easy to maintain.
Description
Technical field
The present invention relates to mesolow electrical distribution field, specifically a kind of Medial ＆ Low Voltage Power Network remote conveying electric system.
Background technology
Part rural area and outlying district, power load dispersion, capacity is low, exists a large amount of more than 500 meters of supply districts
Low-voltage electricity transmission line, the length of certain transmission lines of electricity reach 1-3 kilometers, the length of individual transmission lines of electricity be even up to 3 kilometers with
On.According to national standards, rural power grids can only use 380 volts of three-phase or single-phase 220 volts of power voltage supplies at present, and line loss is big,
User terminal brownout.
Meanwhile rural power grids due to building time it is remote, supply line is long meticulous, single-phase load change greatly.Form season
The partial supply voltage of section property and intermittence is too low or excessively high, and the power quality of the getting worses such as three-phase load unbalance is exceeded to ask
Topic.
20 kilovolts of Utilities Electric Co.'s execution at present, 10 kilovolts of medium voltage networks and 0.4 kilovolt of low voltage electric network country supply standard.Institute
With the unique method that power supply department solves problem above is to set up 10 KV line and 10 kv transformers, with high costs, especially
It is 30 kilowatts of Smaller load type electricity consumers below, is more difficult to realize.
Invention content
A kind of the technical problem to be solved in the present invention is to provide powered stables mesolow reliable, at low cost and easy to maintain
Power grid remote conveying electric system.
In order to solve the above technical problems, the present invention Medial ＆ Low Voltage Power Network remote conveying electric system be structurally characterized in that including with
In the stage transformer for carrying out boost or depressurization operation to input electric power, the electric power after boost or depressurization is conveyed via transmission line of electricity
To user terminal, user terminal be respectively set two secondary transformers to electric power carry out buck or boost, generate AC380V electric power and/or
AC220V electric power is simultaneously conveyed to user.
The input electric power is single-phase 220V electric power, and stage transformer is step-up transformer, and transmission line of electricity is two-wire, two
Secondary transformer is step-down transformer and generates AC380V electric power and AC220V electric power respectively.Preferably, user terminal AC380V
The front setting of power output end unidirectionally turns three phase converer；Voltage compensation is arranged in the front of user terminal AC220V power output ends
Device.
The input electric power is three-phase 380V electric power, and stage transformer is step-up transformer, and transmission line of electricity is three lines, two
Secondary transformer is step-down transformer and generates AC380V electric power.Preferably, wherein AC380V power output ends all the way
Voltage compensator is arranged in front.
The input electric power is single-phase 10KV electric power, and stage transformer is step-down transformer, and transmission line of electricity is two-wire, two
Secondary transformer is step-down transformer and generates AC380V electric power and AC220V electric power respectively.Preferably, user terminal AC380V
The front setting of power output end unidirectionally turns three phase converer；Voltage compensation is arranged in the front of user terminal AC220V power output ends
Device.
The input electric power is three-phase 10KV electric power, and stage transformer is step-down transformer, and transmission line of electricity is three lines, two
Secondary transformer is step-down transformer and generates AC380V electric power.Preferably, wherein AC380V power output ends all the way
Voltage compensator is arranged in front.
It is described that unidirectional to turn three phase converer include rectification circuit, filter circuit, inverter circuit and inverter control circuit.
The Medial ＆ Low Voltage Power Network remote conveying electric system of the present invention has the following advantages that effect：
1）It is more than 500 meters of power supply distances to efficiently solve rural power grids, caused by terminal voltage is too low, three-phase imbalance is asked
Topic.Without extend 10KV circuits, be not required to installation 10 kv transformers, for remote subscriber provide stabilization, it is 220 volts low-loss/
380 volts of power supplys, while realizing voltage stabilizing and three-phrase burden balance；
2）This is suitble to more than the 500 meters radius of electricity supplys such as mountain area, pastoral area, forest zone, farmland, lake region, island, should not set up 10 kilovolts of lines
Road and the small-sized residential area of 10 kv transformers and the communication base station of remote power-feeding, various monitoring points, farm, tea processing factory,
Orchard, green house of vegetables, agriculture fill pumping plant, family workshop, small business；
3）Since the system power supply voltage is between 1 kilovolt and 6 kilovolts, less than 10 kilovolts national supply standards, reduce circuit,
The insulation standard and material cost of equipment.
Description of the drawings
Invention is further described in detail with reference to the accompanying drawings and detailed description：
Fig. 1 is the circuit structure principle schematic of the first embodiment of the invention；
Fig. 2 is the circuit structure principle schematic of second of embodiment of the invention；
Fig. 3 is the circuit structure principle schematic of the third embodiment of the invention；
Fig. 4 is the circuit structure principle schematic of the 4th kind of embodiment of the invention；
Fig. 5 is the single-phase particular circuit configurations schematic diagram for turning three phase converer in the present invention.
Specific implementation mode
With reference to attached drawing, Medial ＆ Low Voltage Power Network remote conveying electric system of the invention include for input electric power carry out boosting or
The stage transformer 1 of reduced pressure operation, the electric power after boost or depressurization are delivered to user terminal via transmission line of electricity, and user terminal is set respectively
It sets two secondary transformers 2 and buck or boost is carried out to electric power, generate AC380V electric power and/or AC220V electric power and be conveyed to use
Family.
According to the difference of input electric power grade, the present invention provides four kinds of specific implementation modes.
Embodiment 1, as shown in Figure 1, input electric power is single-phase 220V electric power, stage transformer 1 is step-up transformer, transmission of electricity
Circuit is two-wire, and two secondary transformers 2 are step-down transformer and generate AC380V electric power and AC220V electric power respectively.User
The front setting of end AC380V power output ends unidirectionally turns three phase converer 3；The front of user terminal AC220V power output ends is set
Set voltage compensator 4.
In Fig. 1, input voltage is promoted to 660 volts or more for 220 volts by step-up transformer, through two-wire power line transmission to use
Electric terminals.Again 380 volts and 220 volts are dropped to step-down transformer.220 volts of voltages are transported to user after voltage compensator adjusts
End.Single-phase 600 volts to 400 volts, by list disclosed by the invention/three phase mains converter conversion, are transformed into 380 volts of three-phase power
Power supply is used for agricultural irrigation and other motor machines.Radius of electricity supply is expanded several times by 220 volts of boost in voltage to 1100 volts.
For certain 1100 volts of low voltage electric network remote conveying electric system in use, radius of electricity supply increases by 4 × 500 meters, and system actual measurement supplies
1.3 kilometers of electrical distance.By 8 kilowatts of Road tests, every voltage indexes meet national supply standard.This single-phase 220 volts
Remote conveying electric system is only used for minitype motivation, household electricity mixed type user because lacking three-phase equilibrium function, and maximum is negative
20 kilowatts of lotus.Its advantage is that construction cost is low, it is easy to safeguard.
Embodiment 2, as shown in Fig. 2, input electric power is three-phase 380V electric power, stage transformer 1 is step-up transformer, transmission of electricity
Circuit is three lines, and two secondary transformers 2 are step-down transformer and generate AC380V electric power.Wherein AC380V electric power all the way
Voltage compensator 4 is arranged in the front of output end.
In Fig. 2,380 volts of voltages of input terminal are increased to 800 volts or more by three-phase voltage increasing transformer, defeated through three phase line
It is sent to triphase step-down transformer, is depressured to 380 volts, electrical source of power is provided for industrial and agricultural production.The larger area of voltage fluctuation, makes
After being adjusted with three-phase voltage compensator, 380 volts of stable power supplys are exported.The system has the function of voltage stabilizing and three-phase equilibrium, is suitble to
200 kilowatts of 380 volts of power of three-phase below and 220 volts of single phase poaer supply users.
Embodiment 3, as shown in figure 3, input electric power is single-phase 10KV electric power, stage transformer 1 is step-down transformer, transmission of electricity
Circuit is two-wire, and two secondary transformers 2 are step-down transformer and generate AC380V electric power and AC220V electric power respectively.User
The front setting of end AC380V power output ends unidirectionally turns three phase converer 3；The front of user terminal AC220V power output ends is set
Set voltage compensator 4.
Embodiment 4, as shown in figure 4, input electric power is three-phase 10KV electric power, stage transformer 1 is step-down transformer, transmission of electricity
Circuit is three lines, and two secondary transformers 2 are step-down transformer and generate AC380V electric power.Wherein AC380V electric power all the way
Voltage compensator 4 is arranged in the front of output end.
Pressure transformer reduced output voltage is single-phase in Fig. 3 and Fig. 4, in 10 kilovolts or 660 volts of three-phase or more voltage, 2200 volts,
3300 volts, under 4400,5500 volts of transmission voltage states, output power can be increased to 100 to 400 kilowatts or more.This 10 kilovolts
Low voltage electric network remote conveying electric system reduces transformer loss and manufacturing cost without step-up transformer, in further simplifying
Low pressure remote conveying electric network.
With reference to Fig. 5, for unidirectionally turning the particular circuit configurations of three phase converer comprising rectification circuit, filter circuit, inverse
Become circuit and inverter control circuit.Particular circuit configurations are the prior art, and details are not described herein.
The Medial ＆ Low Voltage Power Network remote conveying electric system of the present invention has the following advantages that effect：
1）It is more than 500 meters of power supply distances to efficiently solve rural power grids, caused by terminal voltage is too low, three-phase imbalance is asked
Topic.Without extend 10KV circuits, be not required to installation 10 kv transformers, for remote subscriber provide stabilization, it is 220 volts low-loss/
380 volts of power supplys, while realizing voltage stabilizing and three-phrase burden balance；
2）This is suitble to more than the 500 meters radius of electricity supplys such as mountain area, pastoral area, forest zone, farmland, lake region, island, should not set up 10 kilovolts of lines
Road and the small-sized residential area of 10 kv transformers and the communication base station of remote power-feeding, various monitoring points, farm, tea processing factory,
Orchard, green house of vegetables, agriculture fill pumping plant, family workshop, small business；
3）Since the system power supply voltage is between 1 kilovolt and 6 kilovolts, less than 10 kilovolts national supply standards, reduce circuit,
The insulation standard and material cost of equipment.
In conclusion the present invention is not limited to above-mentioned specific implementation modes.Those skilled in the art are not departing from the present invention's
Under the premise of spirit and scope, several change or modification can be done.Above-mentioned change or modification each fall within the protection model of this present invention
It encloses.
Claims (10)
1. a kind of Medial ＆ Low Voltage Power Network remote conveying electric system, it is characterized in that including for carrying out boost or depressurization behaviour to input electric power
The stage transformer of work（1）, the electric power after boost or depressurization is delivered to user terminal via transmission line of electricity, and user terminal is respectively set two
A secondary transformer（2）Buck or boost is carried out to electric power, generate AC380V electric power and/or AC220V electric power and is conveyed to use
Family.
2. Medial ＆ Low Voltage Power Network remote conveying electric system as described in claim 1, it is characterized in that the input electric power is single-phase
220V electric power, stage transformer（1）For step-up transformer, transmission line of electricity is two-wire, two secondary transformers（2）It is that decompression becomes
Depressor and respectively generation AC380V electric power and AC220V electric power.
3. Medial ＆ Low Voltage Power Network remote conveying electric system as claimed in claim 2, it is characterized in that user terminal AC380V electric power exports
The front setting at end unidirectionally turns three phase converer（3）；Voltage compensator is arranged in the front of user terminal AC220V power output ends
（4）.
4. Medial ＆ Low Voltage Power Network remote conveying electric system as described in claim 1, it is characterized in that the input electric power is three-phase
380V electric power, stage transformer（1）For step-up transformer, transmission line of electricity is three lines, two secondary transformers（2）It is that decompression becomes
Depressor and generation AC380V electric power.
5. Medial ＆ Low Voltage Power Network remote conveying electric system as claimed in claim 4, it is characterized in that wherein AC380V electric power is defeated all the way
Voltage compensator is arranged in the front of outlet（4）.
6. Medial ＆ Low Voltage Power Network remote conveying electric system as described in claim 1, it is characterized in that the input electric power is single-phase
10KV electric power, stage transformer（1）For step-down transformer, transmission line of electricity is two-wire, two secondary transformers（2）It is that decompression becomes
Depressor and respectively generation AC380V electric power and AC220V electric power.
7. Medial ＆ Low Voltage Power Network remote conveying electric system as claimed in claim 5, it is characterized in that user terminal AC380V electric power exports
The front setting at end unidirectionally turns three phase converer（3）；Voltage compensator is arranged in the front of user terminal AC220V power output ends
（4）.
8. Medial ＆ Low Voltage Power Network remote conveying electric system as described in claim 1, it is characterized in that the input electric power is three-phase
10KV electric power, stage transformer（1）For step-down transformer, transmission line of electricity is three lines, two secondary transformers（2）It is that decompression becomes
Depressor and generation AC380V electric power.
9. Medial ＆ Low Voltage Power Network remote conveying electric system as claimed in claim 7, it is characterized in that wherein AC380V electric power is defeated all the way
Voltage compensator is arranged in the front of outlet（4）.
10. the Medial ＆ Low Voltage Power Network remote conveying electric system as described in claim 3 or 7, it is characterized in that the unidirectional three-phase that turns turns
Parallel operation（3）Including rectification circuit, filter circuit, inverter circuit and inverter control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810170050.2A CN108448584A (en) | 2018-03-01 | 2018-03-01 | Medial ＆ Low Voltage Power Network remote conveying electric system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810170050.2A CN108448584A (en) | 2018-03-01 | 2018-03-01 | Medial ＆ Low Voltage Power Network remote conveying electric system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108448584A true CN108448584A (en) | 2018-08-24 |
Family
ID=63193175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810170050.2A Pending CN108448584A (en) | 2018-03-01 | 2018-03-01 | Medial ＆ Low Voltage Power Network remote conveying electric system |
Country Status (1)
| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110137936A (en) * | 2019-05-07 | 2019-08-16 | 许继电气股份有限公司 | A kind of building low-voltage DC supply system |
| CN112260284A (en) * | 2020-11-04 | 2021-01-22 | 江西中竹生物质科技有限公司 | Power supply system for reducing power consumption cost of enterprise |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104795818A (en) * | 2015-05-07 | 2015-07-22 | 山东奥联信息科技有限公司 | Remote power-feeding power generator and remote power-feeding fault locating method |
| CN105790268A (en) * | 2016-05-20 | 2016-07-20 | 李建新 | Low-voltage and long-distance power transmission system |
-
2018
- 2018-03-01 CN CN201810170050.2A patent/CN108448584A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104795818A (en) * | 2015-05-07 | 2015-07-22 | 山东奥联信息科技有限公司 | Remote power-feeding power generator and remote power-feeding fault locating method |
| CN105790268A (en) * | 2016-05-20 | 2016-07-20 | 李建新 | Low-voltage and long-distance power transmission system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110137936A (en) * | 2019-05-07 | 2019-08-16 | 许继电气股份有限公司 | A kind of building low-voltage DC supply system |
| CN110137936B (en) * | 2019-05-07 | 2023-09-05 | 许继电气股份有限公司 | Building low-voltage direct current power supply system |
| CN112260284A (en) * | 2020-11-04 | 2021-01-22 | 江西中竹生物质科技有限公司 | Power supply system for reducing power consumption cost of enterprise |
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Application publication date: 20180824 |
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