CN208046244U - A kind of low voltage three-phase imbalance optimal control device - Google Patents
A kind of low voltage three-phase imbalance optimal control device Download PDFInfo
- Publication number
- CN208046244U CN208046244U CN201820086234.6U CN201820086234U CN208046244U CN 208046244 U CN208046244 U CN 208046244U CN 201820086234 U CN201820086234 U CN 201820086234U CN 208046244 U CN208046244 U CN 208046244U
- Authority
- CN
- China
- Prior art keywords
- phase
- load
- taiwan area
- balancing
- monitoring terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model discloses a kind of low voltage three-phase imbalance optimal control device, wherein：Three-phase digital kilowatt-hour meter, three-phase current acquisition module, residual current circuit breaker, the automatic phase-change switch of balancing the load are connect with taiwan area change monitoring terminal, the electricity of branch where the acquisition of three-phase digital kilowatt-hour meter；The three-phase load electric current of circuit where the acquisition of three-phase current acquisition module；Residual current circuit breaker is according to change monitoring terminal order control circuit switching；The automatic phase-change switch of balancing the load automatically switches each phase load according to the order of the balancing the load degree of circuit and change monitoring terminal where installation；Taiwan area change monitoring terminal is connect with data server, and all data of reception are uploaded to data server.The utility model is online three-phase load unbalance adjust automatically in real time, changes the previous phenomenon for manually adjusting lag and inaccuracy, not only time saving but also laborsaving, reduces taiwan area Low-voltage Line Loss, reduces burning out for electrical equipment.
Description
Technical field
The utility model is related to Automation of Electric Systems monitoring fields, and in particular, to a kind of low voltage three-phase imbalance is excellent
Change control device.
Background technology
Low-voltage network is the end of electric system, and low-voltage network uses three-phase four-wire system mode, distribution transformer low
Side is pressed to use Yn0 wiring, the imbalance of power grid that can increase the loss of circuit and transformer, reduce the output of transformer, influence electricity
The power supply quality of net.
The low-voltage network in China is multi-point and wide-ranging, complicated, load character is various, load variations fluctuation is big, and with
People's living standards continue to improve, large power-consuming equipment is more and more, and the electricity consumption level and electricity consumption rule of user is irregular
It is uneven, it is short of along with the technology for administering three-phase imbalance is opposite, management is not in place, leads to the imbalance problem day of three-phase load
Benefit is prominent, drastically influences the safety of power supply quality and low-voltage distribution network operation.Three-phase imbalance problems demand is resolved.
Utility model content
For the defects in the prior art, the purpose of this utility model is to provide a kind of low voltage three-phase imbalance optimal control
Device can not only realize the monitoring and improvement of the adjust automatically and line end low-voltage of three-phrase burden balance, moreover it is possible to realize battalion
Pin pipe is managed.
To achieve the above object, low voltage three-phase imbalance optimal control device described in the utility model, including：Three numbers of phases
Word kilowatt-hour meter, three-phase current acquisition module, residual current circuit breaker, the automatic phase-change switch of balancing the load, taiwan area public affairs become monitoring eventually
End and data server, wherein：
Branched line in the input terminal connection taiwan area of the three-phase digital kilowatt-hour meter, output end are connected to the taiwan area public affairs and become
Monitor terminal, the electricity of branch where the three-phase digital kilowatt-hour meter acquisition are simultaneously transferred to the taiwan area change monitoring terminal；
Branched line in the input terminal connection taiwan area of the three-phase current acquisition module, it is public that output end is connected to the taiwan area
Become monitor terminal, the three-phase load electric current of circuit where the three-phase current acquisition module acquisition is simultaneously transferred to the taiwan area public affairs change
Monitor terminal；
The residual current circuit breaker is connected in taiwan area in branched line, and is communicated with the taiwan area change monitoring terminal
Connection, the residual current circuit breaker is according to change monitoring terminal order control circuit switching；
The automatic phase-change switch of balancing the load is connected in taiwan area in branched line, and becomes monitoring eventually with the taiwan area public affairs
End communication connects, and the automatic phase-change switch of balancing the load monitors itself with the Current Voltage size for carrying circuit, according to institute in real time
Automatically switch each phase load in the balancing the load degree of circuit and the order of the change monitoring terminal；
The taiwan area change monitoring terminal is connect with the data server, and all data of reception are uploaded to the number
According to server.
Preferably, the taiwan area change monitoring terminal passes through RS485 serial communications and the three-phase digital kilowatt-hour meter, described
Residual current circuit breaker, three-phase current acquisition module connection.
Preferably, the taiwan area change monitoring terminal is realized by wireless and carrier communication and is moved certainly with the balancing the load
The mutually connection of switch.
Preferably, the taiwan area change monitoring terminal is uploaded to all data by GPRS/3G/4G wireless telecommunications described
Data server.
Preferably, the automatic phase-change switch of the balancing the load is the balancing the load with wireless and carrier-wave transmission communication interface
Automatic phase-change switch.
Preferably, single-phase capacitance and single-phase resistance are installed in the automatic phase-change switch of the balancing the load, for adjusting list
Phase power-balance.
Preferably, capacitive coupling and alternate resistance are installed in the automatic phase-change switch of the balancing the load, for adjusting three
Phase power-balance.
Preferably, the automatic phase-change switch of the balancing the load can be realized not using permanent-magnet relay as action element
Power failure commutation.
Preferably, described device further comprises doing phase line payload according to the uneven situation of branch three-phase load
Go out the management and control machine that adjustment determines, the management and control machine is connect with the data server.
It is highly preferred that the management and control machine is in the data server in a network, accessed by network share
The taiwan area change monitoring terminal uploads to the data in the data server.
The utility model can realize the automatic commutation of balancing the load by the various data of automatic collection, reached not have a power failure and change
Phase and the purpose of zero passage commutation.The automatic phase-change switch of balancing the load has alternate resistance and capacitance simultaneously, and three-phase phase may be implemented
Between reactive power and active power conversion, optimal balancing the load is realized with minimum capacity.
Compared with prior art, the utility model has following advantageous effect：
1, the utility model has rewritten the history of artificial phase modulation, greatly reduces manpower management cost, improves economy
Benefit.
2, the utility model is online three-phase load unbalance adjust automatically in real time, change it is previous manually adjust lag and
Inaccurate phenomenon, it is not only time saving but also laborsaving.
3, the utility model can be reduced taiwan area Low-voltage Line Loss, reduced burning out for electrical equipment with adjust automatically three-phase load,
There is certain regulation effect to line end low-voltage phenomenon, improves taiwan area power supply reliability.
4, taiwan area three-phase load unbalance and taiwan area parameters data are stored in rear number of units in real time in the utility model
According on server, data sharing being realized, improving modern management level, all levels of management personnel can in time, accurately and comprehensively
Low-voltage platform area operating condition is solved, full and accurate, reliable data foundation is provided for management.
5, the electricity that each circuit of each taiwan area is also acquired in the utility model, to realize that integrated marketing management provides entirely
The data supporting in face.
Description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other spies of the utility model
Sign, objects and advantages will become more apparent upon：
Fig. 1 is one example structure schematic diagram of utility model device；
Fig. 2 is the schematic diagram of one Application Example of the utility model；
Fig. 3 is the automatic phase-change switch circuit figure of balancing the load in one embodiment of the utility model；
In figure：Three-phase digital kilowatt-hour meter 1, three-phase current acquisition module 2, residual current circuit breaker 3, balancing the load are moved certainly
Mutually switch 4, taiwan area change monitoring terminal 5, data server 6, management and control machine 7, gateway 8.
Specific implementation mode
The utility model is described in detail with reference to specific embodiment.Following embodiment will be helpful to this field
Technical staff further understands the utility model, but does not limit the utility model in any form.It should be pointed out that ability
For the those of ordinary skill in domain, without departing from the concept of the premise utility, various modifications and improvements can be made.
These belong to the scope of protection of the utility model.
As Figure 1-Figure 2, a kind of low voltage three-phase imbalance optimal control device, including：Three-phase digital kilowatt-hour meter 1, three
The automatic phase-change switch 4 of phase current acquisition module 2, residual current circuit breaker 3, balancing the load, taiwan area change monitoring terminal 5, data
Server 6, management and control machine 7.Wherein：Three-phase digital kilowatt-hour meter 1, three-phase current acquisition module 2, residual current circuit breaker 3, load are flat
The automatic phase-change switch 4 that weighs is mounted in taiwan area circuit, and is connect with taiwan area change monitoring terminal 5；
The electricity of branch where the three-phase digital kilowatt-hour meter 1 directly acquires installation, and be transmitted to taiwan area public affairs and become monitoring eventually
End 5；
The three-phase load electric current of circuit where the three-phase current acquisition module 2 directly acquires installation, and it is transmitted to taiwan area public affairs
Become monitor terminal 5；
The residual current circuit breaker 3 is according to 5 order control circuit switching of taiwan area change monitoring terminal；
The automatic phase-change switch of the balancing the load 4 monitors itself with the Current Voltage size for carrying circuit, according to place in real time
Each phase load is automatically switched in the order of the balancing the load degree of circuit and the taiwan area change monitoring terminal 5；
Taiwan area change monitoring terminal 5 is connect with data server 6, and all data of reception are uploaded to data server 6.
Further, in the preferred embodiment of part, the taiwan area change monitoring terminal 5 by RS485 serial communications with
The three-phase digital kilowatt-hour meter 1, the residual current circuit breaker 3, the three-phase current acquisition module 2 connection.
Further, in the preferred embodiment of part, the taiwan area change monitoring terminal 5 is real by wireless and carrier communication
Now with the connection of the automatic phase-change switch of the balancing the load 4.
Further, in the preferred embodiment of part, the taiwan area change monitoring terminal 5 passes through GPRS/3G/4G channel radios
All monitoring data are uploaded to the data server 6 by news.
Further, in the preferred embodiment of part, the management and control machine 7 and data server 6 are in in a network,
The data that taiwan area change monitoring terminal 5 uploads in data server 6 are accessed by network share.
Further, in the preferred embodiment of part, the automatic phase-change switch of the balancing the load 4 can make with wireless and
The automatic phase-change switch of the balancing the load of carrier-wave transmission communication interface 4.
Further, single-phase capacitance and single-phase resistance are installed, useful adjusting is single in the automatic phase-change switch of balancing the load 4
Phase power-balance；Capacitive coupling and alternate resistance are installed in the automatic phase-change switch of balancing the load 4, it is flat for adjusting three phase power
Weighing apparatus；In one embodiment, circuit structure as shown in Figure 3 may be used in the automatic phase-change switch of the balancing the load 4,
In：A, B, C are three phase mains, and K1 switchs for alternate power-balance, and K2 is single-phase power balance cock, and C1 is alternate power-balance
Capacitance, C2 are single-phase power balancing capacitance, and R1 is alternate power-balance resistance, and R2 is single-phase power balance resistance.It is multiple above-mentioned
Component connect to form the automatic phase-change switch 4 of a balancing the load by using the circuit of Fig. 3, can realize above-mentioned every work(
Energy.
In addition, in other embodiments, the automatic phase-change switch 4 of balancing the load is using permanent-magnet relay as action element
Part can realize the commutation that do not have a power failure.
Meanwhile the electric current of the automatic phase-change switch of the balancing the load 4 also terminal voltage of monitoring phase line, electricity box unit,
And background data server 6 is uploaded to by taiwan area change monitoring terminal 5.Terminal voltage, the electricity box unit of phase line are monitored simultaneously
Electric current, and background data server 6 is uploaded to by taiwan area change monitoring terminal 5.
Backstage management and control machine 7 is by the data of shared background data server 6, the injustice according to obtained branch three-phase load
Weighing apparatus situation adjusts decision to phase line payload, and oneself of phase specific electric load phase is carried out by the automatic phase-change switch 4 of balancing the load
Dynamic adjustment, to realize " low-voltage " two level joint debugging.
Based on above-mentioned preferred structure, the utility model is in specific application：
The beginning of each branched line is respectively mounted a three-phase current acquisition module 2 in taiwan area, this module directly acquires institute
In the three-phase load electric current of circuit；
Taiwan area public affairs become between monitoring terminal and each three-phase current acquisition module 2 to be communicated by RS485；
Each branched line installs the automatic phase-change switch of several balancing the loads 4 according to actual needs in taiwan area；
The automatic phase-change switch of balancing the load 4 monitors itself with the Current Voltage size for carrying circuit in real time；
Taiwan area public affairs become between monitoring terminal 5 and the automatic phase-change switch of each balancing the load 4 by way of wireless and carrier wave
It is communicated；
Taiwan area public affairs become monitoring terminal 5 and monitor each branch in real time according to each branched line beginning three-phase current acquisition module 2
Degree of unbalancedness, and the payload of the automatic phase-change switch of each balancing the load of the branch 4 is combined, optimal leveling strategy is obtained, is realized
Branch balance, it is final to realize transformer balance.
Each branched line installs a three-phase digital kilowatt-hour meter 1 in taiwan area, and data upload to taiwan area public affairs through RS485 and become
Terminal 5 is monitored, data supporting is provided for marketing management.
The automatic phase-change switch of the balancing the load 4 is the executing agency of whole device, is a kind of Intelligent switching device.One
In embodiment, for the automatic phase-change switch 4 of balancing the load using permanent-magnet relay as action element, permanent-magnet relay has band
Loading capability is strong, small power consumption, moved the features such as speed is fast, loss is small, reliable for operation, at low cost.Characteristic based on permanent-magnet relay,
The present apparatus realizes the function of not power down commutation, and the interruption of customer power supply will not be caused in commutation process, ensure that power supply quality.
" brain " of the taiwan area change monitoring terminal 5 as device is collection sampling, operation, communication, human-computer interaction, intelligence
In the intelligent controlling device of one, which may be used prior art realization for energy networking, balanced logic technology.
The three-phase current acquisition module 2 acquires taiwan area low-pressure side branched line three-phase load electric current, will by 485 serial ports
Branched line electric current is transferred to taiwan area public affairs and becomes monitoring terminal 5.
Specifically, in some embodiments：
The taiwan area public affairs become monitoring terminal 5 and realize to distribution low-voltage side and all outlet critical point Data Datas acquisitions of taiwan area,
The automatic phase-change switch of the balancing the load in low voltage electric network 4 is had under its command by wireless and carrier technology and taiwan area to be communicated.Taiwan area is public
Become automatic 4 node data of phase-change switch of each balancing the load of 5 periodic receipt of monitor terminal, is optimization area with taiwan area low voltage electric network
Domain.
The taiwan area public affairs become monitoring terminal 5 and carry out active unbalanced secondary balancing optimization and gain tune in distribution low-voltage side
It is whole.On the basis of low-voltage circuit three-phrase burden balance optimizes, the automatic phase-change switch 4 of balancing the load is controlled by wireless telecommunications,
The method that can shift each phase active power using the capacitive coupling device inside the automatic phase-change switch of switching balancing the load 4, simultaneously
The ingenious inductance being utilized in load system carries out tune benefit together, small-scale while compensating power factor to realize
The purpose of the uneven watt current of adjustment realizes three as the supplement that advanced optimizes optimized to low voltage electric network three-phase imbalance
The mutually maximization of uneven optimization, realizes bigger benefit.
The taiwan area public affairs become monitoring terminal 5 and realize uneven adjustment idle to the idle in-situ balancing and three-phase of taiwan area, lead to
The wireless telecommunications control automatic phase-change switch 4 of balancing the load is crossed, the alternate electricity inside the automatic phase-change switch of switching balancing the load 4 is utilized
The method that resistance device can shift each phase reactive power, in-situ balancing not only compensates the reactive power consumption of user side, and to compensate and match
Become the reactive power consumption of itself, realizes that high-pressure side idle zero exchanges.Three-phase is idle, and uneven adjustment is compensated by split-phase, is realized
Idle tri-phase unbalance factor it is minimum.
From the foregoing, it can be seen that the utility model is online three-phase load unbalance adjust automatically in real time, change previous artificial
The phenomenon of adjustment lag and inaccuracy, it is not only time saving but also laborsaving.Taiwan area three-phase load unbalance and taiwan area are each in the utility model
Item supplemental characteristic is stored in background data server in real time, realizes data sharing, improves modern management level, Ge Jiguan
Reason personnel can in time, accurately and comprehensively understand low-voltage platform area operating condition, for management provide full and accurate, reliable data according to
According to.
Specific embodiment of the utility model is described above.It is to be appreciated that the utility model not office
It is limited to above-mentioned particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims,
This has no effect on the substantive content of the utility model.
Claims (10)
1. a kind of low voltage three-phase imbalance optimal control device, it is characterised in that including：Three-phase digital kilowatt-hour meter, three-phase current are adopted
Collect module, residual current circuit breaker, the automatic phase-change switch of balancing the load, taiwan area change monitoring terminal and data server, wherein：
Branched line in the input terminal connection taiwan area of the three-phase digital kilowatt-hour meter, output end are connected to the taiwan area public affairs and become monitoring
Terminal, the electricity of branch where the three-phase digital kilowatt-hour meter acquisition are simultaneously transferred to the taiwan area change monitoring terminal；
Branched line in the input terminal connection taiwan area of the three-phase current acquisition module, output end are connected to the taiwan area public affairs and become prison
Control terminal, the three-phase load electric current of circuit where the three-phase current acquisition module acquisition are simultaneously transferred to the taiwan area public affairs change monitoring
Terminal；
The residual current circuit breaker is connected in taiwan area in branched line, and is communicated and connected with the taiwan area change monitoring terminal
It connects, the residual current circuit breaker is according to change monitoring terminal order control circuit switching；
The automatic phase-change switch of balancing the load is connected in taiwan area in branched line, and logical with the taiwan area change monitoring terminal
News connection, the automatic phase-change switch of balancing the load monitor in real time itself band carry circuit Current Voltage size, according to online
Each phase load is automatically switched in the balancing the load degree on road and the order of the change monitoring terminal；
The taiwan area change monitoring terminal is connect with the data server, and all data of reception, which are uploaded to the data, to be taken
Business device.
2. low voltage three-phase imbalance optimal control device according to claim 1, it is characterised in that：The balancing the load is certainly
Dynamic phase-change switch is the automatic phase-change switch of balancing the load with wireless and carrier-wave transmission communication interface.
3. low voltage three-phase imbalance optimal control device according to claim 1, it is characterised in that：The balancing the load is certainly
Single-phase capacitance and single-phase resistance are installed in dynamic phase-change switch, for adjusting single-phase power balance.
4. low voltage three-phase imbalance optimal control device according to claim 1, it is characterised in that：The balancing the load is certainly
Capacitive coupling and alternate resistance are installed in dynamic phase-change switch, for adjusting three-phase power balance.
5. low voltage three-phase imbalance optimal control device according to claim 1, it is characterised in that：The balancing the load is certainly
Dynamic phase-change switch, as action element, can realize the commutation that do not have a power failure using permanent-magnet relay.
6. low voltage three-phase imbalance optimal control device according to claim 1, it is characterised in that：The taiwan area public affairs become prison
Control terminal is adopted by RS485 serial communications and the three-phase digital kilowatt-hour meter, the residual current circuit breaker, the three-phase current
Collect module connection.
7. low voltage three-phase imbalance optimal control device according to claim 1, it is characterised in that：The taiwan area public affairs become prison
Control terminal realizes the connection with the automatic phase-change switch of the balancing the load by wireless and carrier communication.
8. low voltage three-phase imbalance optimal control device according to claim 1, it is characterised in that：The taiwan area public affairs become prison
All data are uploaded to the data server by control terminal by GPRS/3G/4G wireless telecommunications.
9. according to claim 1-8 any one of them low voltage three-phase imbalance optimal control devices, it is characterised in that：The dress
Set the management and control machine for further comprising that the uneven situation according to branch three-phase load adjusts phase line payload decision, institute
Management and control machine is stated to connect with the data server.
10. low voltage three-phase imbalance optimal control device according to claim 9, it is characterised in that：The management and control machine with
The data server is in in a network, is accessed described in the taiwan area change monitoring terminal uploads to by network share
Data in data server.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820086234.6U CN208046244U (en) | 2018-01-18 | 2018-01-18 | A kind of low voltage three-phase imbalance optimal control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820086234.6U CN208046244U (en) | 2018-01-18 | 2018-01-18 | A kind of low voltage three-phase imbalance optimal control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208046244U true CN208046244U (en) | 2018-11-02 |
Family
ID=63953488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820086234.6U Expired - Fee Related CN208046244U (en) | 2018-01-18 | 2018-01-18 | A kind of low voltage three-phase imbalance optimal control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208046244U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113659596A (en) * | 2021-08-31 | 2021-11-16 | 贵州电网有限责任公司 | Low-voltage phase modulation system |
-
2018
- 2018-01-18 CN CN201820086234.6U patent/CN208046244U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113659596A (en) * | 2021-08-31 | 2021-11-16 | 贵州电网有限责任公司 | Low-voltage phase modulation system |
| CN113659596B (en) * | 2021-08-31 | 2024-04-23 | 贵州电网有限责任公司 | Low-voltage phase modulation system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109510221A (en) | The device and method of three-phase imbalance adjustment based on power information acquisition system | |
| CN106816883B (en) | three-phase unbalance adjusting system parallel input system, control method and device | |
| CN111564898A (en) | Multifunctional intelligent control system based on intelligent electric meter | |
| CN105337318A (en) | Phase modulation operation capability test method and system for wind turbine generators | |
| CN106130027A (en) | Two-dimensional comprehensive treatment method for voltage of low-voltage distribution transformer area | |
| CN103595059A (en) | Reactive compensation device of 10kV line | |
| CN208046244U (en) | A kind of low voltage three-phase imbalance optimal control device | |
| CN102664400A (en) | Monitoring method for electric energy quality | |
| CN111262260A (en) | Join in marriage combined electric energy quality of net low pressure platform district and synthesize and administer device | |
| CN204465011U (en) | Distribution power consumption dynamic optimization bascule | |
| CN109103906A (en) | A kind of three-phase power distribution system and three-phase imbalance compensation device | |
| CN203562784U (en) | Reactive compensation device of 10kV line | |
| CN205104912U (en) | Novel lossless balanced load of centralized three -phase device | |
| CN112003336B (en) | Distributed photovoltaic power factor optimization system and method | |
| CN104333016A (en) | Dispersing type reactive compensation system for low-voltage power distribution network | |
| CN209786872U (en) | transformer station power consumption parameter acquisition device based on multiple local area wireless communication technologies | |
| CN105119295B (en) | A kind of electric power system with no-power compensation function | |
| CN209675941U (en) | Series-type voltage regulating device | |
| CN104377711A (en) | Dynamic reactive power compensation method | |
| CN203522209U (en) | Distribution transformer three-phase load intelligent balance system | |
| CN106099959A (en) | A kind of three-phase imbalance based on cloud platform regulation system | |
| CN207459729U (en) | Distributed intelligence feeder voltage control system | |
| CN207074859U (en) | Movable-type intelligent ring device | |
| CN205081479U (en) | A controlling means for balanced governing system of low -voltage load | |
| CN204741279U (en) | Wireless telemetering measurement remote control and GPRS data transmission's reactive compensation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181102 Termination date: 20200118 |