CN206461372U - Power distribution station three-phase load unbalance automatic regulating system - Google Patents
Power distribution station three-phase load unbalance automatic regulating system Download PDFInfo
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- CN206461372U CN206461372U CN201720154122.5U CN201720154122U CN206461372U CN 206461372 U CN206461372 U CN 206461372U CN 201720154122 U CN201720154122 U CN 201720154122U CN 206461372 U CN206461372 U CN 206461372U
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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 power distribution station three-phase load unbalance automatic regulating system, it includes being arranged on the three-phase load unbalance automatic regulation controller that transformer outlet three gets along and the intelligent phase-change switch for being arranged on each user's three-phase electricity access port, the three-phase load unbalance automatic regulation controller is connected with the testing agency for setting transformer outlet three to get along, the three-phase load unbalance automatic regulation controller includes being used to receive the voltage of the transformer outlet of testing agency's detection, the collecting unit of current parameters, data for being received according to collecting unit carry out the control unit of commutation operation and the operational order of control unit are output to the first communication unit of intelligent phase-change switch, the intelligent phase-change switch of each installation is controlled by three-phase load unbalance automatic regulation controller, realize the automatic commutation of load, so as to reach that regulation reaches balance for the three-phase load of radio area transformer outgoing line side, ensure that the unbalance factor of three-phase load is less than 15%.
Description
Technical field
The utility model belongs to low-voltage distribution field, and in particular to a kind of power distribution station three-phase load unbalance is automatically adjusted
System.
Background technology
Power distribution station is the base unit that urban and rural residents of China power, and its power supply quality directly affects the life life of resident
Production, with the enhancing of national power these years, the improvement of people's living standards, electricity consumption of resident is significantly increased.Although power network is not yet
Disconnected transformation is still difficult to the increase and change that keep up with residential electricity consumption to meet demand of the resident to electricity consumption.For resident and
Power system is that line end voltage is low than more prominent contradiction, causes household electrical appliance to be difficult to normal work, influence resident is just
Often life, the transport inspection department door of power system is often by customer complaint.The main cause for causing line end voltage low is that three-phase is born
Lotus imbalance causes monophase current excessive, and the phase line voltage drop is big, causes the phase line terminal voltage low.If three can be solved
Phase load is uneven, will largely solve the problem of line end voltage is low.
Current power system is for the main counter-measure of three-phase load unbalance：
1st, power system fortune inspection personnel, the size of three-phase load, manual phase modulation are surveyed in residential electricity consumption side, and weak point is
Power-off is first had to, residential electricity consumption is influenceed, next to that the time is indefinite, labor intensity is big.It is finally that solution is never thorough, often leading portion
Time adjusts, the problem of occurring in that three-phase imbalance again due to the change of load after a time.Above phenomenon and solution party
Case causes power system fortune inspection tired in hurrying back and forth in phase modulation.
2nd, increase power distribution station transformer, again stringing, so not only invest big, and long construction period, to power train
System causes very big financial burden.
3rd, install three-phase load out-of-flatness self-checking device additional, because residential electricity consumption is more dispersed, be typically mounted at transformation
By the cable branch box of device outlet side, can have and adjust transformer outlet in real time to the three-phase load of the mount point, the good results are evident.
But transformer outlet side can only be ensured to the three-phrase burden balance of this section of circuit of mount point, mount point to this section of circuit of user
Three be consistent imbalance have no idea solution, do not tackle the problem at its root.And cost is higher, oneself power consumption is larger, increases
Line loss is added.
Utility model content
In order to overcome the technical deficiency of the above, the utility model provides a kind of power distribution station three-phase load unbalance and adjusted automatically
Section system.
The utility model provides a kind of power distribution station three-phase load unbalance automatic regulating system, and it includes being arranged on transformation
Device exports the three three-phase load unbalance automatic regulation controllers got along and the intelligence for being arranged on each user's three-phase electricity access port
Can phase-change switch, the company of testing agency that the three-phase load unbalance automatic regulation controller is got along with setting transformer outlet three
Connect, the three-phase load unbalance automatic regulation controller includes being used to receive the electricity of the transformer outlet of testing agency's detection
Pressure, the collecting unit of current parameters, the data for being received according to collecting unit carry out the control unit of commutation operation and incited somebody to action
The operational order of control unit is output to the first communication unit of intelligent phase-change switch.
The intelligent phase-change switch includes three phase-change switches, and three phase-change switches are connected with A, B, C tri- respectively, zero line
It is straight-through to set, by three phase-change switches realize three-phase enter it is single-phase go out, and the phase-change switch is controlled by the three-phase load not
Balance automatic regulation controller.
The phase-change switch is magnetic latching relay.
The intelligent phase-change switch is provided with communicates the second communication unit being connected, described second with first communication unit
Communication unit receives the commutation operational order that the three-phase load unbalance automatic regulation controller is sent.
First communication unit and the second communication unit use RS485 communication modes.
The three-phase load unbalance automatic regulation controller is provided with human-computer interaction unit.
The three-phase load unbalance automatic regulation controller be provided be provided with wireless communication unit, and will detection data and
Operational order is uploaded to remote terminal.
The intelligent phase-change switch is provided with manual/auto switch unit.
The intelligent phase-change switch is provided with over-current protecting unit.
The beneficial effects of the utility model：The intelligence of each installation is controlled by three-phase load unbalance automatic regulation controller
Phase-change switch, realizes the automatic commutation of load, so that reach that regulation reaches balance for the three-phase load of radio area transformer outgoing line side,
Ensure that the unbalance factor of three-phase load is less than 15%.
Brief description of the drawings
Fig. 1 is circuit diagram of the present utility model.
Fig. 2 is the theory diagram of three-phase load unbalance automatic regulation controller of the present utility model.
Fig. 3 is the connection diagram of intelligent phase-change switch of the present utility model.
Fig. 4 is the waveform diagram of the voltage zero-cross input of intelligent phase-change switch of the present utility model.
Fig. 5 is the waveform diagram of zero passage excision of the present utility model.
Fig. 6 is the schematic diagram before regulation of the present utility model.
Fig. 7 is the schematic diagram after regulation of the present utility model.
Embodiment
The utility model embodiment is described further below in conjunction with the accompanying drawings：
As illustrated, the utility model provides a kind of power distribution station three-phase load unbalance automatic regulating system, it includes
It is arranged on the three-phase load unbalance automatic regulation controller 2 got along the outlet of transformer 1 three and is arranged on each user's three-phase
The intelligent phase-change switch 3 of mouth is electrically accessed, the three-phase load unbalance automatic regulation controller is with setting transformer outlet three-phase
Testing agency's connection at place, the three-phase load unbalance automatic regulation controller includes the change for being used to receive testing agency's detection
Voltage, the collecting unit of current parameters of depressor outlet, collecting unit include current acquisition unit 21 and voltage acquisition unit 26,
Data for being received according to collecting unit carry out the control unit 22 and the operational order by control unit 22 of commutation operation
It is output to the first communication unit 27 of intelligent phase-change switch.The intelligent phase-change switch is provided with to be communicated with first communication unit
Second communication unit of connection, second communication unit receives what the three-phase load unbalance automatic regulation controller was sent
Commutation operational order.
Three-phase load unbalance automatic regulation controller is arranged in the JP cabinets of transformer outgoing line side or cable branch box, intelligence
Energy phase-change switch takes two-phase to enter user's point installed in three-phase and four-line circuit, and the detection of three-phase load unbalance automatic regulation controller becomes
Depressor outlet three-phase load, according to three-phase load size, sends instruction control and is powered mounted in the different intelligent phase-change switch of user
Which mutually provided by.
The intelligent phase-change switch includes three phase-change switches, and the phase-change switch is magnetic latching relay, three commutations
Switch is connected with A, B, C tri- respectively, and zero line is straight-through to be set, by three phase-change switches realize three-phase enter it is single-phase go out, it is and described
Phase-change switch is controlled by the three-phase load unbalance automatic regulation controller, realizes the phase selection of one-out-three.
Three-phase load unbalance automatic regulation controller detects transformer outlet three-phase load in real time, according to the real-time of load
Change, the action of the intelligent phase-change switch of regulation in real time, with the rapidity adjusted in real time.Eliminate manually commutation simultaneously
Waste time and energy.
Three-phase load unbalance automatic regulation controller has following characteristics：
1. gather the power network ginseng such as the voltage of transformer outlet side three-phase, electric current, voltage harmonic, current harmonics, active and reactive
Number.
2. described in the first communication unit and the second communication unit use RS485 communication modes, it is negative according to the three-phase collected
Lotus size passes through computing, passes through RS485 communication modes, the action of the intelligent phase-change switch of control in real time, so as to ensure three-phase load
Degree of unbalancedness is less than 15%.
3. described in three-phase load unbalance automatic regulation controller be provided with wireless communication unit 28, and number will be detected
According to this and operational order is uploaded to remote terminal, it has wireless communication function, be able to will be collected by GPRS communication modes
Parameters of electric power and regulation situation upload main website in real time.
The three-phase load unbalance automatic regulation controller is provided with human-computer interaction unit 24, can directly obtain data simultaneously
Adjusted manually.
Power subsystem 25 is additionally provided with simultaneously provides power supply to three-phase load unbalance automatic regulation controller.
Intelligent phase-change switch is using magnetic latching relay as phase-change switch, and three-phase and four-line inlet wire, single-phase outlet goes out
The zero line of line is led directly to, and live wire can be connected with the A phases or B phases or C phases of power supply as needed, that is to say, that the power supply of user side
It can arbitrarily choose, so as to realize the purpose of regulation transformer outlet side three-phase load, such as scheme in A phases or B phases or C phase three-phases
Shown in 3, and there are following characteristics：
1st, switching time is short, switching time during commutation≤20ms, due to by the drive for adjusting magnetic latching relay coil
Voltage is moved, just the closure of adjustable switch contact and turn-off time, by the calibration dispatched from the factory, it is ensured that the closure of switch contact is with breaking
ETAD expected time of arrival and departure is 5ms, the reserved 10ms of switch interval time.So as to ensure whole commutation time≤20ms.In commutation process not shadow
Ring customer power supply, it is ensured that consumer electronics equipment will not be because commutation overlong time causes decompression and can not normal work.
2nd, voltage zero-cross is put into, it is ensured that zero current is put into, current over-zero excision, without electric arc during excision.Current residential electricity consumption
Electric equipment natural power factor close to 1, so by judge voltage over zero i.e. can be achieved voltage zero-cross put into, electric current
Zero passage is cut off.As shown in Figures 4 and 5.
3rd, the intelligent phase-change switch is provided with over-current protecting unit.Overcurrent protection, by detecting load current, was simulated negative
Lotus anti-time limit characteristic, realizes overcurrent protection.
4th, low-power consumption, because the switch for commutation uses magnetic latching relay, the closure of magnetic latching relay and disjunction
Positive and negative trigger voltage only need to be applied on coil, you can realize closure and the segmentation of switch, treat closing for magnetic latching relay contact
After the completion of conjunction and disjunction, you can cancel the trigger voltage on coil, realize that state is protected by the inside magnet steel of magnetic latching relay
Hold.No longer power consumption.
5th, the intelligent phase-change switch is provided with manual/auto switch unit.Manual local commutation operation is changed with remote control
It is combined.It can be realized by the button operation of intelligent phase-change switch and carry out commutation manually, can also pass through RS485 communications or channel radio
The control signal that news receive controller realizes commutation.
As shown in figure 6,
One supply radio area transformer, under connect five single-phase loads, at a time load change after.The electricity of each user
It is as follows that stream and transformer always go out line current：
The user that A phases are powered is that user 1：30A, user 3：60A, user 5：40A.
B phases are powered as user 2, and electric current is：90A.
C phases are powered as user 4, and electric current is：60A.
Transformer outlet side A phases total current is 130A, and B phases total current is 90A, and C phases total current is 60A.Degree of unbalancedness is
Computational methods be：（Maximum phase load-minimum phase load）/ maximum is consistent.
The degree of unbalancedness at so moment is：（130-60）/130=53.8%.
As shown in fig. 7, after judging through the computing of three-phase load unbalance automatic regulation controller, sending the intelligent commutation of instruction and opening
Pass is acted, and the power supply of user 1 changes to C phases by A phases, and other are constant, as a result as follows：
A phases are powered：User 3：60A, user 5：40A.
B phases are powered：User 2： 90A.
C phases are powered：User 4：60A, user 1：30A,
Transformer outlet side A phases total current is 100A, and B phases total current is 90A, and C phases total current is 90A.Degree of unbalancedness is
Computational methods be：（Maximum phase load-minimum phase load）/ maximum is consistent.
The degree of unbalancedness at so moment is：（100-90）/110=10%.
Conclusion：After overregulating, degree of unbalancedness will be 10% by original 53.8%, meet the demand of power system.
Embodiment is not construed as to limitation of the present utility model, any to be based on spiritual improvements introduced of the present utility model,
All should be within protection domain of the present utility model.
Claims (9)
1. a kind of power distribution station three-phase load unbalance automatic regulating system, it is characterised in that：It, which includes being arranged on transformer, goes out
Mouthfuls three three-phase load unbalance automatic regulation controllers got along and it is arranged on the intelligence of each user's three-phase electricity access port and changes
Mutually switch, the three-phase load unbalance automatic regulation controller is connected with the testing agency for setting transformer outlet three to get along,
The three-phase load unbalance automatic regulation controller includes being used to receive voltage, the electricity of the transformer outlet of testing agency's detection
The collecting unit of parameter, the data for receiving according to collecting unit is flowed to carry out the control unit of commutation operation and will control single
The operational order of member is output to the first communication unit of intelligent phase-change switch.
2. three-phase load unbalance automatic regulating system in power distribution station according to claim 1, it is characterised in that the intelligence
Energy phase-change switch includes three phase-change switches, and three phase-change switches are connected with A, B, C tri- respectively, and zero line is straight-through to be set, and is passed through
Three phase-change switches realize three-phase enter it is single-phase go out, and the phase-change switch is controlled by the three-phase load unbalance and automatically adjusts control
Device processed.
3. three-phase load unbalance automatic regulating system in power distribution station according to claim 2, it is characterised in that described to change
Mutually switch is magnetic latching relay.
4. the power distribution station three-phase load unbalance automatic regulating system according to claim 1 or 2 or 3, it is characterised in that
The intelligent phase-change switch is provided with communicates the second communication unit being connected, second communication unit with first communication unit
Receive the commutation operational order that the three-phase load unbalance automatic regulation controller is sent.
5. three-phase load unbalance automatic regulating system in power distribution station according to claim 4, it is characterised in that described
One communication unit and the second communication unit use RS485 communication modes.
6. three-phase load unbalance automatic regulating system in power distribution station according to claim 1, it is characterised in that described three
Phase load imbalance automatic regulation controller is provided with human-computer interaction unit.
7. three-phase load unbalance automatic regulating system in power distribution station according to claim 1, it is characterised in that described three
Phase load imbalance automatic regulation controller is provided with wireless communication unit, and detection data and operational order are uploaded to
Remote terminal.
8. the power distribution station three-phase load unbalance automatic regulating system according to claim 1 or 2 or 3, it is characterised in that
The intelligent phase-change switch is provided with manual/auto switch unit.
9. the power distribution station three-phase load unbalance automatic regulating system according to claim 1 or 2 or 3, it is characterised in that
The intelligent phase-change switch is provided with over-current protecting unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720154122.5U CN206461372U (en) | 2017-02-21 | 2017-02-21 | Power distribution station three-phase load unbalance automatic regulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720154122.5U CN206461372U (en) | 2017-02-21 | 2017-02-21 | Power distribution station three-phase load unbalance automatic regulating system |
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| CN206461372U true CN206461372U (en) | 2017-09-01 |
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ID=59691596
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| CN201720154122.5U Active CN206461372U (en) | 2017-02-21 | 2017-02-21 | Power distribution station three-phase load unbalance automatic regulating system |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634527A (en) * | 2017-11-09 | 2018-01-26 | 中气电力装备有限公司 | A kind of regulating system for administering distribute-electricity transformer district three-phase imbalance |
| CN107677912A (en) * | 2017-11-09 | 2018-02-09 | 云南电网有限责任公司临沧供电局 | A kind of detection device and detection method of low pressure automatic phase selecting load equalizer |
| CN108365619A (en) * | 2018-05-03 | 2018-08-03 | 广东电网有限责任公司 | Three-phase imbalance commutation device |
| CN108512234A (en) * | 2018-02-01 | 2018-09-07 | 广东电网有限责任公司韶关供电局 | A kind of three-phase load automatic ballance regulator and system |
| CN108539770A (en) * | 2018-05-14 | 2018-09-14 | 浙江星明智能电气科技有限公司 | Phase-change switch type three-phase load unbalance administers regulating device and its application method |
| CN109004660A (en) * | 2018-07-23 | 2018-12-14 | 深圳市粤能电气有限公司 | A kind of intelligence commutation mechanism load smart allocation device |
| CN109066731A (en) * | 2018-07-26 | 2018-12-21 | 广东电网有限责任公司佛山供电局 | Distribution net platform region three-phase load unbalance self-checking device |
| CN109116096A (en) * | 2018-09-19 | 2019-01-01 | 广东电网有限责任公司 | A kind of power distribution station outlet branch line switching voltage alarm device |
| CN110429621A (en) * | 2019-08-05 | 2019-11-08 | 三峡大学 | The apparatus and method of distribution three-phase imbalance are solved without commutation |
| CN110579650A (en) * | 2019-07-19 | 2019-12-17 | 国家电网有限公司 | Distribution transformer platform district low-voltage side three-phase real load warning and severe unbalance alarm system |
| CN110867860A (en) * | 2019-12-01 | 2020-03-06 | 张翼洲 | Low-voltage automatic pre-distribution three-phase line single-household ammeter box |
| CN110957747A (en) * | 2019-12-01 | 2020-04-03 | 张翼洲 | Low-voltage automatic pre-distribution three-phase line balance box |
| CN111130128A (en) * | 2019-12-01 | 2020-05-08 | 张翼洲 | Low-voltage automatic pre-distribution three-phase line balance box based on Internet of things and big data |
| CN113659594A (en) * | 2021-07-22 | 2021-11-16 | 国网安徽省电力有限公司霍邱县供电公司 | Distributed low-voltage three-phase load intelligent balancing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107677912A (en) * | 2017-11-09 | 2018-02-09 | 云南电网有限责任公司临沧供电局 | A kind of detection device and detection method of low pressure automatic phase selecting load equalizer |
| CN107677912B (en) * | 2017-11-09 | 2018-12-25 | 云南电网有限责任公司临沧供电局 | A kind of detection device and detection method of low pressure automatic phase selecting load equalizer |
| CN107634527B (en) * | 2017-11-09 | 2024-03-19 | 中气电力装备有限公司 | Regulation system for treating three-phase imbalance of distribution transformer area |
| CN107634527A (en) * | 2017-11-09 | 2018-01-26 | 中气电力装备有限公司 | A kind of regulating system for administering distribute-electricity transformer district three-phase imbalance |
| CN108512234A (en) * | 2018-02-01 | 2018-09-07 | 广东电网有限责任公司韶关供电局 | A kind of three-phase load automatic ballance regulator and system |
| CN108365619A (en) * | 2018-05-03 | 2018-08-03 | 广东电网有限责任公司 | Three-phase imbalance commutation device |
| CN108539770A (en) * | 2018-05-14 | 2018-09-14 | 浙江星明智能电气科技有限公司 | Phase-change switch type three-phase load unbalance administers regulating device and its application method |
| CN109004660B (en) * | 2018-07-23 | 2023-10-20 | 深圳市粤能电气有限公司 | Intelligent load distributor for intelligent camera changing mechanism |
| CN109004660A (en) * | 2018-07-23 | 2018-12-14 | 深圳市粤能电气有限公司 | A kind of intelligence commutation mechanism load smart allocation device |
| CN109066731A (en) * | 2018-07-26 | 2018-12-21 | 广东电网有限责任公司佛山供电局 | Distribution net platform region three-phase load unbalance self-checking device |
| CN109116096A (en) * | 2018-09-19 | 2019-01-01 | 广东电网有限责任公司 | A kind of power distribution station outlet branch line switching voltage alarm device |
| CN109116096B (en) * | 2018-09-19 | 2024-01-23 | 广东电网有限责任公司 | Switch voltage alarm device for outgoing line branch line of power distribution station |
| CN110579650A (en) * | 2019-07-19 | 2019-12-17 | 国家电网有限公司 | Distribution transformer platform district low-voltage side three-phase real load warning and severe unbalance alarm system |
| CN110579650B (en) * | 2019-07-19 | 2021-08-03 | 国家电网有限公司 | Distribution transformer platform district low-voltage side three-phase real load warning and severe unbalance alarm system |
| CN110429621A (en) * | 2019-08-05 | 2019-11-08 | 三峡大学 | The apparatus and method of distribution three-phase imbalance are solved without commutation |
| CN111130128A (en) * | 2019-12-01 | 2020-05-08 | 张翼洲 | Low-voltage automatic pre-distribution three-phase line balance box based on Internet of things and big data |
| CN110957747A (en) * | 2019-12-01 | 2020-04-03 | 张翼洲 | Low-voltage automatic pre-distribution three-phase line balance box |
| CN110867860A (en) * | 2019-12-01 | 2020-03-06 | 张翼洲 | Low-voltage automatic pre-distribution three-phase line single-household ammeter box |
| CN113659594A (en) * | 2021-07-22 | 2021-11-16 | 国网安徽省电力有限公司霍邱县供电公司 | Distributed low-voltage three-phase load intelligent balancing device |
| CN113659594B (en) * | 2021-07-22 | 2024-05-24 | 国网安徽省电力有限公司霍邱县供电公司 | Distributed low-voltage three-phase load intelligent balancing device |
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