CN204205614U - Three-phase phase-change switch device - Google Patents
Three-phase phase-change switch device Download PDFInfo
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- CN204205614U CN204205614U CN201420492236.7U CN201420492236U CN204205614U CN 204205614 U CN204205614 U CN 204205614U CN 201420492236 U CN201420492236 U CN 201420492236U CN 204205614 U CN204205614 U CN 204205614U
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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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The utility model provides a kind of three-phase phase-change switch device, and this three-phase phase-change switch device comprises: collecting unit, is electrically connected with the power transmission line in distribution transformer exit, for gathering voltage data and the current data of alternating current in power transmission line; Processing unit, whether processing unit is electrically connected with collecting unit, for analyzing the voltage and current data of collecting unit, judges whether voltage data and current data reach threshold condition, determine to switch phase-change switch, and sends commutation instruction; Phase-change switch, is electrically connected with the power transmission line at the load place of concentrating, and for receiving commutation instruction, switches the phase place of alternating current in power transmission line.Can realize automatic monitoring to three-phase alternating current by the utility model, the every phase voltage of Real-time Collection, electric current phase sequence also regularly report to backstage.Can to automatically switch phase place or active reporting backstage perform backstage switching command immediately according to set point when three-phase electricity supply load occurring being uneven, the on-the-spot or long-range phase place to alternating current switches.
Description
Technical field
The utility model relates to field of power transmission, particularly relates to a kind of three-phase phase-change switch device.
Background technology
China is about 3.5 × 10 in the total capacity of fortune transformer at present
9kVA, the total number of units due to transformer is many and capacity large, and therefore electric energy loss is huge.According to statistics, only the electric energy loss of distribution transformer (hereinafter referred to as distribution transforming) is just about 30 ~ 50TWh every year, accounts for 2 ~ 3% of gross generation.The inefficient capacity of distribution transform of being on active service more than 20 years at electric online operation is at present about 2.4 × 10
8kVA, because these distribution transforming parameters are aging, loss is high, defect is many, operational reliability is poor, threatens electric power netting safe running.Therefore distribution transforming transformation task and energy-saving potential huge.Wherein, the loss especially caused with three-phase load unbalance is the most outstanding.
In power industry, usually the way for adjustment three-phase load unbalance is that staff measures every voltage, electric current with measuring instrument at the scene, as unbalanced in found three phase supply load, then need the current power supply of power-off of operating a switch, switch power supply phase manually, and then combined floodgate restores electricity.Therefore can affect user power utilization undoubtedly like this, cause unnecessary trouble to user, also can reduce the productivity effect of power supply enterprise simultaneously.
Utility model content
Problem to be solved in the utility model is: provide a kind of three-phase phase-change switch device, during solving in prior art as regulating three-phase load unbalance, switching power supply phase time and need operate a switch and have a power failure and the relevant issues brought.
The technical solution of the utility model is to provide a kind of three-phase phase-change switch device, and this three-phase phase-change switch device comprises:
Collecting unit, is electrically connected with the power transmission line in distribution transformer exit, for gathering voltage data and the current data of alternating current in power transmission line;
Processing unit, whether this processing unit is electrically connected with collecting unit, for analyzing voltage data and the current data of collecting unit, judges whether described voltage data and current data reach threshold condition, determine to switch phase-change switch, and sends commutation instruction;
Phase-change switch, is electrically connected with the power transmission line at the load place of concentrating, and for receiving commutation instruction, switches the phase place of alternating current in power transmission line.Described collecting unit also comprises:
In one embodiment, collecting unit also comprises: voltage transformer summation current transformer, and wherein said voltage transformer and described current transformer measure the described voltage data of described power transmission line and described current data respectively.
In one embodiment, collecting unit also comprises: communication module, and the data of collection are sent to server by described communication module by described processing unit, receives and performs the operational order of server.
In one embodiment, cable network or wireless network transmissions data are passed through between described communication module and described server.
In one embodiment, collecting unit also comprises analog to digital converter, between described collecting unit and described processing unit, for described voltage signal and current signal are converted to digital signal.
Can realize automatic monitoring to three-phase alternating current by the utility model, the every phase voltage of Real-time Collection and current data, and timing reports to backstage.Can to automatically switch phase place or active reporting backstage perform backstage switching command immediately according to set point when three-phase electricity supply load occurring being uneven, the on-the-spot or long-range phase place to three-phase alternating current switches.
Accompanying drawing explanation
Fig. 1 is the local structure chart controlling three-phase phase-change switch device;
Fig. 2 is the system construction drawing of the utility model three-phase phase-change switch device;
Fig. 3 A and Fig. 3 B is actuator's schematic diagram of three-phase phase-change switch device;
Fig. 4 is the structure chart of Long-distance Control three-phase phase-change switch;
Embodiment
For making the object of the utility model embodiment, technical scheme and advantage clearly understand, below in conjunction with accompanying drawing, the utility model embodiment is described in further details.For this reason, embodiment of the present utility model and illustrating for explaining the utility model, but not as to restriction of the present utility model.
The utility model embodiments provides a kind of three-phase phase-change switch device, can be used for power industry to use.
Specifically described below.
Fig. 1 is the structure chart that this locality of the present utility model controls three-phase phase-change switch device, and three-phase phase-change switch device of the present utility model comprises:
Collecting unit 101, is electrically connected with the power transmission line in distribution transformer exit, for gathering voltage data and the current data of alternating current in power transmission line;
Processing unit 102, described processing unit 102 is electrically connected with described collecting unit 101, for analyzing the described data of described collecting unit 101, judges whether described voltage data and current data reach threshold condition, determine whether phase-change switch 103 is switched, and send commutation instruction;
Phase-change switch 103, is electrically connected with the power transmission line at the load place of concentrating, and for receiving commutation instruction, switches the phase place of alternating current in power transmission line.
As an embodiment of the present utility model, collecting unit 101 also comprises:
Voltage transformer summation current transformer, wherein voltage transformer summation current transformer measures voltage data and the current data of power transmission line respectively.
As an embodiment of the present utility model, collecting unit 101 also comprises:
Communication module and server 104, these data gathered are sent to server 104 by communication module by processing unit 102, and receive and perform the operational order of server 104.
As an embodiment of the present utility model, three-phase phase-change switch device also comprises:
Analog to digital converter, wherein analog to digital converter is between collecting unit 101 and processing unit 102, for voltage signal and current signal are converted to digital signal.
As an embodiment of the present utility model, the mode of processing unit 102 and the transmission data between server 104 and phase-change switch 103 includes spider lines or wireless network.
Can realize automatic monitoring to three-phase alternating current by the utility model, the every phase voltage of Real-time Collection, electric current, and timing reports to backstage.When there is three-phase electricity supply load and being uneven, processing unit can to automatically switch phase place or report background server immediately and perform backstage switching command according to set point, after there is alternate load unbalanced situation, at the scene or the long-range phase place to three-phase alternating current switch.
For ease of understanding, with three-phase phase change method and device, the application example in electric power enterprise is described below.
Embodiment 1
Fig. 2 is the system construction drawing for the utility model three-phase phase-change switch device.Incorporated by reference to Fig. 1, each phase access voltage transformer summation current transformer of the three-phase alternating current respectively in distribution transformer exit, in order to measure three-phase voltage.All data measured that gather all can calculate according to three-phase voltage, electric current, phase sequence etc.Voltage transformer summation current transformer exports a milliampere level Weak current signal at output respectively.
The output of voltage transformer summation current transformer is connected with A/D convertor circuit, the core of A/D convertor circuit is 16 high-precision AD acquisition chips of a slice multi pass acquisition, the analog input port of three-phase voltage current access AD acquisition chip, within a certain period of time each phase voltage in one-period, electric current are completed and once gathered, owing to being AC signal, so the AD result of each phase is made up of a class value, therefore A/D chip collection is differential signal, and ensure the voltage of three-phase, electric current totally 6 groups of signals gathered simultaneously.
After the three-phase voltage current having gathered one-period, compared with the electric current and voltage threshold value preset by the electric current and voltage data of one-period, and judge that whether each phase load is balanced, whether have anomalous event to occur accordingly.
Specifically, judge whether to switch described phase-change switch 103 specifically to comprise:
If electric current and voltage value reaches threshold condition, then send commutation instruction;
If electric current and voltage value does not reach threshold condition, then carry out next collection period.
Such as, actual measurement A phase current 180A, and presetting maximum load current is 120A, then load warning trigger condition, control unit continues to detect A phase current, is continuing to detect that A phase current is greater than after 120A exceedes setting-up time, trigger alarm flow process, automatically switches to other two-phase.
To the concrete operation method of commutation instruction switching three-phase phase-change switch be described in detail below:
Fig. 3 A and Fig. 3 B is actuator's schematic diagram of a three-phase phase-change switch device.
In Fig. 3 A, JA1H, JA1F, JA2H, JA2F, JA3H, JA3F are the parts that performs an action that three-phase electricity switches, JA1, JB1, JC1 in Fig. 3 B are the auxiliary controllable silicons that three-phase electricity switches, JA2, JB2, JC2 are the contacts of the relay switched, and TA, TB, TC are the thyristors that three-phase switches.
As shown in the figure, if make A phase switch to B phase, then the process performing a three-phase alternating current Phase-switching is as follows:
Step 1, when the load unbalanced position of three-phase alternating current is at A phase time, Ja1 closing position.
Step 2, receiving the commutation instruction of processor for being switched to B phase time when three-phase phase-change switch, closing Ja2, Ta thyristor, Jb2, point Ta thyristor after point Ja1,50ms after 50ms;
More than for A phase switches to the process of B phase, the switching of other phase places please refer to this process.
After detecting that Ta divides out, close Tb, Jb1, point Ja2, Jb2 after 50ms.
After being switched by above-mentioned commutation, each phase power load of three-phase alternating current can be made to reach poised state, and device enters next collection period.
The three-phase phase change method provided by the present embodiment and device, when three-phase electricity supply load occurring being uneven, can be automatically switched phase place according to set point, on-the-spotly switches the phase place of three-phase alternating current.
Embodiment 2
Referring to Fig. 4, is the schematic diagram to multiple three-phase phase-change switch forming control system as shown in the figure, and relative to Fig. 1, the principle of embodiment 2 is identical with embodiment 1, there is no substantial difference.
Particularly, after the data acquisition of the three-phase alternating current in distribution line is completed one-period by collecting unit 101, these data are converted to digital signal by A/D convertor circuit, at processing unit 102 (CPU), these data are sent to far-end server 104 by processing unit 102.Wherein, processing unit 102 both can the mode of choice for use wire communication, and other short-distance wireless communication modes such as GPRS and far-end server 104 also can be used to carry out data communication.Far-end server 104 can the switching mode of setting threshold scope and phase-change switch 103.After the electric current and voltage value of measured three-phase phase-change switch 103 in alternating current transmission line reaches threshold condition, can judge that each phase load is unbalanced anomalous event.Far-end server 104 just performs three-phase alternating current Phase-switching by processing unit to three-phase phase-change switch 103.
Identical with the control mode principle of embodiment 1 to the control mode of multiple three-phase phase-change switch, do not repeat them here.
In sum, the three-phase phase change method being applied to power distribution network of the utility model embodiment and device, operating efficiency and the reliability of whole electrical network can be improved, solve the shop problem that Non-follow control commutation needs to have a power failure, reduce operations risks and the cost of power supply enterprise, to the aspect such as collection and Automated condtrol of electric network data, all there is very important realistic meaning.
Those skilled in the art should understand, the communication mode that embodiments of the invention provide can adopt the form of different embodiments.That is, in the embodiment of the present invention, the mode in commutation system, the timing of the information such as measurement result, operating state being reported background server includes but not limited to by wireless communication mode such as GPRS, also can by the form of the communication modes such as mode wire communication such as cable network.
Be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Claims (5)
1. a three-phase phase-change switch device, is characterized in that, described three-phase phase-change switch device comprises:
Collecting unit, is electrically connected with the power transmission line in distribution transformer exit, for gathering voltage data and the current data of alternating current in described power transmission line;
Processing unit, described processing unit is electrically connected with described collecting unit, for analyzing described voltage data and the current data of described collecting unit, judges whether described voltage data and current data reach threshold condition, determine whether phase-change switch is switched, and send commutation instruction;
Phase-change switch, is electrically connected with the described power transmission line at the load place of concentrating, and for receiving described commutation instruction, switches the phase place of alternating current in power transmission line.
2. three-phase phase-change switch device as claimed in claim 1, it is characterized in that, described collecting unit also comprises:
Voltage transformer summation current transformer, wherein said voltage transformer and described current transformer measure the described voltage data of described power transmission line and described current data respectively.
3. three-phase phase-change switch device as claimed in claim 1, is characterized in that, also comprise:
Communication module, the data of collection are sent to server by described communication module by described processing unit, receive and perform the operational order of server.
4. three-phase phase-change switch device as claimed in claim 3, is characterized in that, by cable network or wireless network transmissions data between described communication module and described server.
5. three-phase phase-change switch device as claimed in claim 2, is characterized in that, also comprise:
Analog to digital converter, between described collecting unit and described processing unit, for being converted to digital signal by described voltage signal and current signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420492236.7U CN204205614U (en) | 2014-08-28 | 2014-08-28 | Three-phase phase-change switch device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420492236.7U CN204205614U (en) | 2014-08-28 | 2014-08-28 | Three-phase phase-change switch device |
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| CN204205614U true CN204205614U (en) | 2015-03-11 |
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| CN201420492236.7U Active CN204205614U (en) | 2014-08-28 | 2014-08-28 | Three-phase phase-change switch device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105305470A (en) * | 2015-08-07 | 2016-02-03 | 北京中电博达科技有限公司 | Low-voltage load balance adjustment device for power distribution network, and automatic phase-change switch |
| CN108767971A (en) * | 2018-05-29 | 2018-11-06 | 河南森源电气股份有限公司 | A kind of single-phase intelligent power supply management method and device |
-
2014
- 2014-08-28 CN CN201420492236.7U patent/CN204205614U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105305470A (en) * | 2015-08-07 | 2016-02-03 | 北京中电博达科技有限公司 | Low-voltage load balance adjustment device for power distribution network, and automatic phase-change switch |
| CN108767971A (en) * | 2018-05-29 | 2018-11-06 | 河南森源电气股份有限公司 | A kind of single-phase intelligent power supply management method and device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 730030, No. 8 Binhe East Road, Chengguan District, Gansu, Lanzhou Co-patentee after: BAIYIN POWER SUPPLY COMPANY, STATE GRID GANSU ELECTRIC POWER CO., LTD. Patentee after: State Grid Gansu Electric Power Company Co-patentee after: Beijing NARI yanhuayuan Power Technology Co. Ltd. Address before: 730030, No. 8 Binhe East Road, Chengguan District, Gansu, Lanzhou Co-patentee before: BAIYIN POWER SUPPLY COMPANY, STATE GRID GANSU ELECTRIC POWER CO., LTD. Patentee before: State Grid Gansu Electric Power Company Co-patentee before: Dianyan Huayuan Power Tech. Co., Ltd., Beijing |
|
| CP03 | Change of name, title or address |