CN104993504A - Unbalanced load charged commutation apparatus - Google Patents
Unbalanced load charged commutation apparatus Download PDFInfo
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- CN104993504A CN104993504A CN201410560554.7A CN201410560554A CN104993504A CN 104993504 A CN104993504 A CN 104993504A CN 201410560554 A CN201410560554 A CN 201410560554A CN 104993504 A CN104993504 A CN 104993504A
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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
Provided is an unbalanced load charged commutation apparatus, which adjusts three-phase load balance through rapidly switching a single-phase load causing three-phase imbalance into another phase. The apparatus is provided with two input channels, wherein one input channel and a current single-phase load phase line are in connection, and the other channel is in connection with a phase line to be switched. The apparatus is provided with an output channel to be in connection with a single-phase load live wire. In a load switching process, the connection and disconnection of the input channel and the output channel are controlled, and the apparatus supplies power to the load in a manual switching process of the single-phase load and completes commutation, thereby substantially reducing load outage time, and improving the reliability of user power utilization.
Description
Technical field
The present invention relates to a kind of device with realization, electrical network three-phrase burden balance adjusted by the charged commutation of uncompensated load.
Background technology
Traditional Man switches the mode that the power supply of single-phase load adjusts three-phase equilibrium mutually to be needed first to have a power failure to load to operate again, this has had a strong impact on the power supply reliability to user, propose challenge to the power supply reliability of electrical network, therefore the three-phase imbalance problem of low and medium voltage distribution network and rural power grids has become problem demanding prompt solution in current power distribution systems.In Distribution network system, due to early stage electrical reticulation design plan inconsiderate, there will be the situation that a large amount of single-phase load concentrates on a phase or two-phase, these unbalanced loads can make distribution system produce three-phase imbalance, cause the imbalance of electric power system three-phase voltage, electric current.Three-phase voltage or the asymmetric meeting of electric current cause a series of harm to the generating in electric power system, transmission of electricity, controller switching equipment and power consumption equipment, such as: increase line loss, increase the active loss of distribution transformer, reduction distribution transformer is exerted oneself, affected output power of motor etc., therefore just need effective way to address these problems.Due to the restriction of the factors such as circuit and distribution transformer One's name is legion, power supply user dispersion, fund cost in Distribution network especially agricultural network, the modes such as net mending network are adjusted to solve the problem of three-phase imbalance by configuration low-voltage reactive compensator capable and load and unrealistic, so utilize now the charged commutation device of uncompensated load to complete the adjustment of three-phrase burden balance.
Summary of the invention
The invention provides one utilizes the charged commutation device of uncompensated load to complete three-phrase burden balance adjustment.When there is three-phase imbalance in electrical network, the phase line being switched the electric power system place that single-phase load accesses by charged commutation device carrys out Load adjustment, makes it be tending towards three-phase equilibrium.Concrete scheme is: before wanting commutation, the access of this device is needed the phase line switched, during initial condition, input channel and output channel disconnect, control break-make by controller and make input channel L1 (1) and output channel L3 (3) conducting, single-phase load (1) live wire and phase line are disconnected, now, power to load via this device.Control break-make by controller, input channel L1 (1) and output channel L3 (3) are disconnected, meanwhile, input channel L2 (2) and output channel L3 (3) conducting, complete commutation.Again the live wire of load is connected with the phase line after commutation, device input channel and output channel are all disconnected, device is closed and pulls down.
The charged commutation device of a kind of uncompensated load, this device comprises input channel L1 (1), input channel L2 (2), output channel L3 (3), the neutral line/ground wire passage N (4), microcontroller (7), controls display panel (8).It is characterized in that: input channel L1 (1), input channel L2 (2) are connected with a bidirectional triode thyristor (9) respectively, be connected with output channel L3 (3) after two bidirectional triode thyristors (9) are in parallel, control turn-on instant with microcontroller (7), the control information of microcontroller (7) is by controlling display panel (8) display.
The charged commutation device of uncompensated load controls break-make by controller and completes load commutation, the dead electricity time of single-phase load was determined by the operate time of device, generally can control within 10ms, and the mode adopting traditional manual to switch, the interruption duration of load often will more than 30min, the charged commutation device of visible uncompensated load can effectively avoid traditional manual to switch the long-time power failure phenomenon caused, and greatly improves the power supply reliability of user; This device is easy and simple to handle and with low cost simultaneously, reduces reactive-load compensation equipment and uses, and greatly reduces power cost and drops into; In addition the problem causing three-phase imbalance because early stage layout of roads is inconsiderate, do not need to carry out regular rapid adjustment to three-phase load, often only once just need can be ensured the three-phase equilibrium of long period by the charged commutation device adjustment of uncompensated load, therefore the charged commutation device of uncompensated load has high using value in these cases.
Accompanying drawing explanation
Fig. 1 is the operating diagram of a kind of situation of the present invention.
Fig. 2 is apparatus of the present invention schematic diagrams.
Claims (3)
1., in low-voltage network and rural power grids, adopt the charged commutation device of manual switchover uncompensated load to complete three-phrase burden balance adjustment with Load adjustment supply power mode in charged situation.
2. the charged commutation device of uncompensated load, comprises input channel L1 (1), input channel L2 (2), output channel L3 (3), the neutral line/ground wire passage N (4), microcontroller (7), controls display panel (8).
3. it is characterized in that: the charged commutation device of uncompensated load, when needs carry out commutation to load power (as being switched to C phase from B phase), the input channel L1 (1) of device is connected with the power supply phase circuit (B phase) of load, the input channel L2 (2) of device is connected with needing the circuit (C phase) switching phase, the output channel L3 (3) of device is connected with load, now disconnect the original supply line of load, device input channel L1 (1) and output channel L3 (3) conducting, load becomes is powered by device output channel L3 (3) by former power supply phase (B phase is connected with input channel L1 (1)), load not power-off, at this moment the switching push button on device control display panel (8) is pressed, device input channel L2 (2) and output channel L3 (3) conducting, load becomes is powered by device output channel L3 (3) by needs switching phase (C phase is connected with input channel L2 (2)), finally load feeder ear and needs are switched phase (C phase) connection, the connection of detaching device output channel L3 (3) and load namely in artificial charged situation switchable load power and complete commutation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410560554.7A CN104993504A (en) | 2014-10-21 | 2014-10-21 | Unbalanced load charged commutation apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410560554.7A CN104993504A (en) | 2014-10-21 | 2014-10-21 | Unbalanced load charged commutation apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104993504A true CN104993504A (en) | 2015-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410560554.7A Pending CN104993504A (en) | 2014-10-21 | 2014-10-21 | Unbalanced load charged commutation apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN104993504A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105914763B (en) * | 2016-05-23 | 2019-01-25 | 江苏首捷智能设备有限公司 | A kind of novel intelligent phase-change switch and method for power distribution station |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101609991A (en) * | 2009-07-15 | 2009-12-23 | 王霞 | Three-phase load transfer device |
| CN102946108A (en) * | 2012-11-21 | 2013-02-27 | 保定供电公司 | Voltage automatic compensation device |
| CN202840532U (en) * | 2012-10-30 | 2013-03-27 | 保定供电公司 | Low-pressure three-phase load balancing device |
| JP2013198232A (en) * | 2012-03-19 | 2013-09-30 | Mitsubishi Electric Corp | Three-phase unbalance suppression system |
| CN103337867A (en) * | 2013-06-28 | 2013-10-02 | 国家电网公司 | Low voltage load online phase modulation device and phase modulation method thereof |
-
2014
- 2014-10-21 CN CN201410560554.7A patent/CN104993504A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101609991A (en) * | 2009-07-15 | 2009-12-23 | 王霞 | Three-phase load transfer device |
| JP2013198232A (en) * | 2012-03-19 | 2013-09-30 | Mitsubishi Electric Corp | Three-phase unbalance suppression system |
| CN202840532U (en) * | 2012-10-30 | 2013-03-27 | 保定供电公司 | Low-pressure three-phase load balancing device |
| CN102946108A (en) * | 2012-11-21 | 2013-02-27 | 保定供电公司 | Voltage automatic compensation device |
| CN103337867A (en) * | 2013-06-28 | 2013-10-02 | 国家电网公司 | Low voltage load online phase modulation device and phase modulation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105914763B (en) * | 2016-05-23 | 2019-01-25 | 江苏首捷智能设备有限公司 | A kind of novel intelligent phase-change switch and method for power distribution station |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151021 |