CN205681134U - A kind of three-phase commutation device being applicable to low-voltage platform area three-phase imbalance adjustment - Google Patents
A kind of three-phase commutation device being applicable to low-voltage platform area three-phase imbalance adjustment Download PDFInfo
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- CN205681134U CN205681134U CN201620458761.6U CN201620458761U CN205681134U CN 205681134 U CN205681134 U CN 205681134U CN 201620458761 U CN201620458761 U CN 201620458761U CN 205681134 U CN205681134 U CN 205681134U
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Abstract
The utility model discloses and be applicable to the three-phase commutation device that low-voltage platform area three-phase imbalance adjusts, solve the defect of current single-phase commutation device: the 1st, after single-phase commutation device commutation, circuit threephase load below may phase-deficient operation；If 2 single-phase commutation devices are arranged at branch road end single-phase load, owing to interchangeable single-phase load is less, so needing to increase commutation device quantity, increase input cost, increase construction volume and equipment management work amount, of the present utility model being characterized by: device is arranged on the junction that platform distinguishes branch line and basic routing line, constituting three-phase imbalance with commutation monitor terminal in platform district distribution box and adjust system, a table apparatus is responsible for the L on a branched line1、L2、L3Three-phase load order commutation；Receive the L that commutation monitor terminal is sent1、L2、L3After needing the phase sequence link information changed, by processing the parameter of circuit and sample circuit collection, realize L by special algorithm and logic control1、L2、L3Three-phase load is according to commutation monitor terminal instruction phase sequence work in distribution box.
Description
Technical field
The present invention relates to the problem that low-voltage distribution network three-phase imbalance adjusts, specifically low-voltage platform area three-phase imbalance adjusts
Three-phase commutation device.
Background technology
Low-voltage platform area is due to the existence of a large amount of single-phase loads, and three-phase load is difficult to keep balance, in particular with power consumption
Increase, the three-phase imbalance contradiction of low-voltage platform area.
Three-phase imbalance can increase line energy loss, increases the electric energy loss of distribution transformer；Reduce transformer to exert oneself,
Shorten the distribution transformer life-span；Also can cause Local Low Voltage；Also can reduce induction conductivity to exert oneself and service life.
The main method solving three-phase imbalance at present is human at periodic intervals or irregular phase modulation, and workload is huge, and can not
The change following load adjusts in time, needs power failure phase modulation.
Single-phase load commutation device occurs in the market, as shown in Figure 7, Figure 8.
If this single-phase commutation device is arranged in the middle of three-phase line, threephase load phase shortage below after commutation, can be caused
Run.If this single phase device is arranged at branch road end uniline, owing to interchangeable single-phase load is less, so needing
Increase single-phase commutation device quantity, cost of increasing input, increase construction volume and equipment management work amount.
Based on above-mentioned situation, in the urgent need to a kind of new departure, solve existing three-phase imbalance and adjust problem.
Content of the invention
For disadvantages described above or the Improvement requirement of prior art, the invention discloses one and be applicable to low-voltage platform area three-phase not
The three-phase commutation device of balanced adjustment.
Of the present utility model to the effect that:
Described three-phase commutation device is arranged on the junction that platform distinguishes branch line and basic routing line, joins with being arranged on platform district
Commutation monitor terminal in electronic box constitutes a low-voltage platform area three-phase imbalance and adjusts system, and a table apparatus is responsible on a branch road
L1、L2、L3Three-phase load order commutation；
Described device includes communicating circuit, sample circuit, process circuit, control circuit, control switch；
Further, communicating circuit can be GPRS communicating circuit, 485 communicating circuits, carrier communication circuit, small wireless communication
Circuit etc.；
Further, control switch can use controllable silicon, magnetic latching relay or the mode that both combine.
Further, described device uses three groups of control switches, and often group is 3 way control switch；3 way control switch K1\K2\K3
End of incoming cables is connected with circuit A/B/C three-phase respectively；Often group control switch K1\K2\K3Leading-out terminal and be connected with L branch line after connecing.Logical
Cross 3 way control switch that hardware interlock drive circuit realizes that any moment often organizes and only have 1 way control switch Guan Bi, other 2 tunnels controls
System switches off.
Described device fills to this commutation by communicating circuit and commutation monitor terminal communication in distribution box, commutation monitor terminal
Put the L sending1、L2、L3After needing the phase sequence link information changed, i.e. L1、L2、L3It is ABC or BCA or CAB phase sequence respectively
Link information, the primary voltage processing the commutation device that gathers according to sample circuit of circuit of three-phase commutation device, line voltage,
Go out line current and the parameter of control switch remote signalling, realize L by special algorithm and logic control1、L2、L3Three-phase load according to
The instruction phase sequence work of commutation monitor terminal.
Described device collects control switcher input voltage, input current, output voltage, output electric current by sample circuit
And remote signalling value confirms that this way control switch circuit is off, it is ensured that often group control switch only 1 way control switch Guan Bi,
Prevent A/B/C three-phase shortcircuit.
Brief description
Fig. 1 is three-phase commutation device on-the-spot application schematic diagram
Fig. 2 is three-phase commutation device three-phase connection diagram
Fig. 3 is three-phase commutation device theory diagram
Fig. 4 is three-phase commutation device control switch wire connection schematic diagram
Fig. 5 is current data and control switch connection diagram before the three-phase load commutation of embodiment platform district
Fig. 6 is embodiment platform district three-phase load commutation after-current data and control switch connection diagram
Fig. 7 is single-phase commutation device scheme of installation
Fig. 8 is single-phase commutation device conspectus
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 enforcement
Example, carries out detailed utility model further to the utility model.It should be appreciated that specific embodiment described herein only in order to
Explain the utility model, be not used to limit the utility model.
Below in conjunction with accompanying drawing, the utility model is further described.
As described in Figure 1, three-phase commutation device on the line is installed with the commutation monitoring being arranged in platform district distribution box eventually
End constitutes a low-voltage platform area three-phase imbalance and adjusts system, and three-phase commutation device is arranged on platform and distinguishes branch line and basic routing line
Junction.
As described in Figure 2, the three-phase connection diagram representing three-phase commutation device definitely, is arranged on branched line
Front end, the three-phase load order commutation being responsible on branched line.
As described in Fig. 3, Fig. 4, L1、L2、L3Outlet line is connected with three groups of control switches respectively, and often group control switch is by 3
Way control switch forms, and 3 way control switch ends of incoming cables are connected with A/B/C three-phase respectively, and leading-out terminal is connected in parallel and L output line
Road connects.Realize that any moment 3 way control switch only has 1 way control switch Guan Bi, other 2 tunnels by hardware interlock drive circuit
Control switches off.
There is sample circuit in three-phase commutation device, process circuit, control circuit, control switch, communicating circuit.Device passes through
Communicating circuit and commutation monitor terminal communication in distribution box, commutation monitor terminal gives the L that this commutation device is sent1、L2、L3Need
After the phase sequence link information changed, i.e. L1、L2、L3Being ABC or BCA or CAB phase sequence link information respectively, three-phase commutation fills
Primary voltage, the line voltage of the process commutation device according to sample circuit collection for the circuit put, go out line current and control is opened
Close the parameter of remote signalling, it is achieved L1、L2、L3Three-phase load is according to commutation monitor terminal instruction phase sequence work in distribution box.
Embodiment:
As described in Fig. 5, Fig. 6, in branched line and basic routing line junction, three three-phase commutation devices are installed.
Current conditions such as following table before commutation:
Commutation monitor terminal, according to each branched line current conditions receiving, carries out 9 groups of permutation and combination and calculates, find three
Phase total current balances most and needs phase-change switch action to try one's best few permutation and combination method, sends corresponding control command.The first via
Commutation device is failure to actuate, and the second road commutation device changes according to B, C, A phase sequence according to C, A, B phase sequence commutation, the 3rd road commutation device
Phase.
First via commutation device phase sequence is constant, L1、L2、L3Current value is respectively as follows: 100A, 75A, 40A；
Second road commutation device is according to C, A, B phase sequence commutation, i.e. L1Being connected with C phase, electric current 95A is switched to C phase；L2With A phase
Being connected, electric current 60A is switched to A phase；L3Being connected with B phase, electric current 30A is switched to B phase；L after commutation1、L2、L3Three-phase electricity flow valuve is divided
It is not: 60A, 30A, 95A；
3rd road commutation device is according to B, C, A phase sequence commutation, L1Being connected with B phase, electric current 75A is switched to B phase；L2With C phase phase
Even, electric current 40A is switched to C phase；L3Being connected with A phase, electric current 30A is switched to A phase；L after commutation1、L2、L3Three-phase electricity flow valuve is respectively
For: 30A, 75A, 40A；
After three three-phase commutation devices put into, current conditions such as following table:
After commutation, basic routing line threephase load total current is respectively as follows: A phase 400A, B phase 380A, C phase 405A, basically reaches platform
District's load three-phase equilibrium, three-phase commutation device quantity is more, and three-phase equilibrium effect is better.
Claims (2)
1. one kind is applicable to the three-phase commutation device that low-voltage platform area three-phase imbalance adjusts, it is characterised in that: described device includes
Communicating circuit, sample circuit, process circuit, control circuit, control switch；
Described device uses three groups of control switches, and often group is 3 way control switch；3 way control switch K1\K2\K3End of incoming cables respectively with
Circuit A/B/C three-phase is connected；Often group control switch K1\K2\K3Leading-out terminal and be connected with L branch line after connecing, driven by hardware interlock
3 way control switch that dynamic circuit realiration any moment is often organized only have 1 way control switch Guan Bi, and other 2 way control switch disconnect,
Described device is arranged on the junction that platform distinguishes branch line and basic routing line, with the commutation prison being arranged in platform district distribution box
Control terminal constitutes a low-voltage platform area three-phase imbalance and adjusts system, and a table apparatus is responsible for the L on a branch road1、L2、L3Three-phase
Load order commutation；
Described device sends to described device by communicating circuit and commutation monitor terminal communication in distribution box, commutation monitor terminal
L1、L2、L3After needing the phase sequence link information changed, i.e. L1、L2、L3It is ABC or BCA or CAB phase sequence link information respectively,
Described device process circuit according to primary voltage, the line voltage of the three-phase commutation device of sample circuit collection, go out line current
And the parameter of control switch remote signalling, it is achieved L1、L2、L3Three-phase load is according to commutation monitor terminal instruction phase sequence work in distribution box
Make.
2. a kind of three-phase commutation device being applicable to low-voltage platform area three-phase imbalance adjustment according to claim 1, it is special
Levy and be: collected primary voltage, line voltage by sample circuit, go out line current and the parameter of control switch remote signalling,
All parameters all meet and just confirm in the case of requirement that this way control switch circuit is off, it is ensured that often group control switch
Only 1 way control switch Guan Bi, prevents A/B/C three-phase shortcircuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620458761.6U CN205681134U (en) | 2016-05-17 | 2016-05-17 | A kind of three-phase commutation device being applicable to low-voltage platform area three-phase imbalance adjustment |
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| CN201620458761.6U CN205681134U (en) | 2016-05-17 | 2016-05-17 | A kind of three-phase commutation device being applicable to low-voltage platform area three-phase imbalance adjustment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107104449A (en) * | 2017-04-07 | 2017-08-29 | 南京新联能源技术有限责任公司 | Electronic type phase inversion is switched |
| CN108365618A (en) * | 2018-04-04 | 2018-08-03 | 国网湖南省电力公司郴州供电分公司 | Band carries formula three-phase equilibrium self-regulation device |
| CN108418307A (en) * | 2018-04-04 | 2018-08-17 | 郴州市东塘电气设备有限公司 | With the intelligent control main website for carrying formula three-phase equilibrium self-regulation device |
| CN109510221A (en) * | 2018-11-29 | 2019-03-22 | 国网安徽省电力有限公司滁州供电公司 | The device and method of three-phase imbalance adjustment based on power information acquisition system |
| CN112448368A (en) * | 2019-08-30 | 2021-03-05 | 许继电气股份有限公司 | Pumped storage power station generator motor protection commutation method and device |
| WO2022016903A1 (en) * | 2020-07-24 | 2022-01-27 | 石家庄科林电气股份有限公司 | Automatic low-voltage area topology identification method |
-
2016
- 2016-05-17 CN CN201620458761.6U patent/CN205681134U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107104449A (en) * | 2017-04-07 | 2017-08-29 | 南京新联能源技术有限责任公司 | Electronic type phase inversion is switched |
| CN108365618A (en) * | 2018-04-04 | 2018-08-03 | 国网湖南省电力公司郴州供电分公司 | Band carries formula three-phase equilibrium self-regulation device |
| CN108418307A (en) * | 2018-04-04 | 2018-08-17 | 郴州市东塘电气设备有限公司 | With the intelligent control main website for carrying formula three-phase equilibrium self-regulation device |
| CN109510221A (en) * | 2018-11-29 | 2019-03-22 | 国网安徽省电力有限公司滁州供电公司 | The device and method of three-phase imbalance adjustment based on power information acquisition system |
| CN112448368A (en) * | 2019-08-30 | 2021-03-05 | 许继电气股份有限公司 | Pumped storage power station generator motor protection commutation method and device |
| CN112448368B (en) * | 2019-08-30 | 2023-12-12 | 许继电气股份有限公司 | Protection commutation method and device for generator motor of pumped storage power station |
| WO2022016903A1 (en) * | 2020-07-24 | 2022-01-27 | 石家庄科林电气股份有限公司 | Automatic low-voltage area topology identification method |
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