CN107834576A - A kind of distribution three-phase load unbalance has automatically carries adjusting means and control method - Google Patents
A kind of distribution three-phase load unbalance has automatically carries adjusting means and control method Download PDFInfo
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- CN107834576A CN107834576A CN201710446779.3A CN201710446779A CN107834576A CN 107834576 A CN107834576 A CN 107834576A CN 201710446779 A CN201710446779 A CN 201710446779A CN 107834576 A CN107834576 A CN 107834576A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- H02J13/0017—
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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
Have automatically the invention discloses a kind of distribution three-phase load unbalance and carry adjusting means and control method, including three-phase phase voltage collection transmitter, three-phase output control switch, automatic control circuit, rectifier power source；Three-phase phase voltage collection transmitter is used for the three-phase phase voltage for gathering present apparatus position, and send three-phase phase voltage value to automatic control circuit in the form of communications protocol or other electrical transformations by converting, three-phase output control switch is respectively connected to onto A phases, B phases or C phases go for manipulating load, the remote-controlled launcher is used to customer charge is accessed into a certain phase or directly cuts off load, and rectifier power source is used to three-phase high-voltage alternating current being converted to single phase low voltage direct current.The present apparatus is cheap, easy for installation, simple in construction, safe and reliable, only need to install the present apparatus additional in the entrance line T junctions of 400V overhead line structures, you can receive obvious effect.
Description
Technical field
The present invention relates to distribution three-phase load unbalance adjusting means, more particularly to a kind of distribution three-phase load unbalance is certainly
It is dynamic to have load adjusting means and control method.
Background technology
For the three-phase load unbalance problem of distribution, current solution method is：Supervised by maintainer from intelligent network distribution
The current value (load) that each taiwan area of distribution is inquired about on platform is controlled, when finding load unbalanced, first cuts off load (power failure), then
It is artificial to step on bar operation, remove original joint of load downlead and snap into the lighter other phase of load, finally restore electricity.
This working method has the following disadvantages：
1. needing to cut off load, load loss is caused to power network, and influences power supply quality, to the normal electricity consumption of user
Inconvenience is caused with life.
2. manually stepping on bar operation, waste time and energy, there is falling from high altitude equivalent risk.
If 3. parallel, neighbouring, scissors crossing be present, joint use circuit, it may occur that personnel touch electricity and sensing by mistake
Electric casualty accident.
4. needing artificial checking monitoring platform, efficiency is low, there is a possibility that human factor causes mistake.
The content of the invention
It is an object of the invention to provide a kind of mutually electric by three-phase phase voltage, the calculating three-phase of harvester position
The difference of maxima and minima is pressed, and whether given threshold is exceeded as " distribution three-phase load is uneven according to the voltage difference
Weighing apparatus " basis for estimation, so as to automatically by the Distribution Network Load Data controlled from the heavier phase of load be switched to the lighter phase of load from
It is dynamic to have load adjusting means, solve the problems, such as to propose in above-mentioned prior art.
The present invention uses following technical scheme：A kind of distribution three-phase load unbalance has load adjusting means, including three automatically
Phase phase voltage gathers transmitter, three-phase output control switch, automatic control circuit, remote-controlled launcher and reception device, rectification
Power supply；Three-phase phase voltage collection transmitter is used for the three-phase phase voltage for gathering present apparatus position, and by convert with
Communications protocol or the form of other electrical transformations send three-phase phase voltage value to automatic control circuit, the three-phase output control
Switch and be respectively connected to onto A phases, B phases or C phases go for manipulating load, the remote-controlled launcher includes remote control with reception device
Device, remote control receive circuit, and receive circuit by the remote control of manual operation remote control control is connected with automatic control circuit, for that will use
Family load accesses a certain phase, and the rectifier power source is used to three-phase high-voltage alternating current being converted to single phase low voltage direct current.
As the further scheme of the present invention, include other auxiliary circuits of audible-visual annunciator, LCDs, other
Auxiliary circuit is connected by man-machine interaction signal output with automatic control circuit.
As the further scheme of the present invention, the three-phase output control switch includes but is not limited to A.C. contactor, magnetic
Guard relay or other use low pressure Small current control high-voltage great-current switching device.
As the further scheme of the present invention, automatic control circuit include but is not limited to relay, single-chip microcomputer, DSP/DSC,
PLC, embedded system, industrial control computer or other automatic control circuits, and supporting control software.
As the further scheme of the present invention, the communications protocol includes but is not limited to MODBUS-RTU agreements.
As the further scheme of the present invention, AC 0-250V linear transformations are including but not limited to by other electrical transformations
DC 0-5V form.
Distribution three-phase load unbalance has the control method for carrying adjusting means automatically, comprises the following steps：Automatically control electricity
After road receives the three-phase phase voltage value that three-phase phase voltage collection transmitter is sent, three-phase phase is found out by comparing first
Mutually phase voltage maximum difference △ U=phase voltage maximums Umax- is then calculated where the maximum of voltage with phase where minimum value
Phase voltage minimum value Umin, and compared with the threshold value of setting, if phase voltage maximum difference △ U exceed threshold value, and phase where load
It is exactly voltage most low phase, then the overload of phase, control circuit will enter a random countdown mechanism, and treat where being considered as load
After random countdown terminates, if phase voltage maximum difference △ U are never revert to below threshold value, phase where being considered as load
Based model for load duration is overweight, and now control circuit is by manipulating three-phase output control switch, by the load switching controlled to current electricity
The pressure phase of highest one gets on, and operation is completed.
The random countdown mechanism refers to that when detecting that phase voltage maximum difference △ U exceed threshold value control circuit is first
A time progress countdown is first randomly selected among 10.0s~599.9s, now control circuit will continue from three-phase phase electricity
Three-phase phase voltage, detection phase voltage maximum difference △ U are obtained in pressure collection pick-up device.Before countdown returns to 0, once phase
Voltage maximum difference △ U are returned within threshold value setting range, that is, are considered as overload state and have been obtained effective alleviation, control electricity
Road will automatically exit from countdown state, and device is failure to actuate, only when countdown state is from starting to 0, phase voltage maximum difference △ U
Be continued for exceeding threshold value, then after countdown terminates, the load switching that device automatically can just be controlled it to current voltage most
That lighter phase of high load capacity.
The solution have the advantages that：1st, load adjusts：After installing and using the present apparatus, can in the case where not having a power failure,
Band customer charge completes phase modulation operation, will not cause load loss and customer complaint；2nd, automatically adjust：Device judges its control automatically
A phase load where the load of system is overweight, then this all the way load switching to going in the lighter phase of load.Need not be artificial
Checking monitoring platform；3rd, random delay：" random countdown " mechanism of introducing, prevents multichannel load while switching causes power network ripple
It is dynamic；4th, without communication：The present apparatus, can be by adopting using the three-phase phase voltage maximum difference △ U of its position as criterion on the spot
Collect distinguishing rule of the three-phase phase voltage as " load unbalanced ", rather than the current value at taiwan area transformer outlet.Therefore it is not required to
The measurement apparatus of three-phase current to be installed at taiwan area transformer, it is not required that with other devices, other monitor supervision platforms, or each
Communicated between adjusting means, therefore, saved the expense for setting up the communication medias such as cable, optical fiber again, it is not required that rent
Rent the GPRS passages of telecom operators, greatly saved cost of installation and use；5th, it is unattended：Whole distribution three-phase load
When, it is not necessary to operation of manually ascending a height, no falling from high altitude, mistakenly entering charged chamber, electrical body is touched by mistake, the safety wind such as induced electricity is hurted sb.'s feelings
Danger, effective guarantee personal safety；6th, regulation manually：Maintainer can be needed according to scene or superior command, uses remote control
The local operation present apparatus, customer charge is accessed into a certain phase, the present apparatus is cheap, easy for installation, simple in construction, safe can
Lean on, only need to install the present apparatus additional in the entrance line T junctions of 400V overhead line structures, you can receive obvious effect.
Brief description of the drawings
Fig. 1 is the control principle drawing of the present invention；
Fig. 2 is present invention manipulation logical flow chart.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and detailed description.
As shown in Figure 1-2, a kind of distribution three-phase load unbalance has load adjusting means, including three-phase phase voltage collection automatically
Transmitter, three-phase output control switch, automatic control circuit, remote-controlled launcher and reception device, rectifier power source and acousto-optic
Other auxiliary circuits of alarm, LCDs, other auxiliary circuits are by man-machine interaction signal output and automatically control electricity
Road connects；The three-phase phase voltage collection transmitter is used for the three-phase phase voltage for gathering present apparatus position, and passes through conversion
Three-phase phase voltage value is sent to automatic control circuit, the communications protocol bag in the form of communications protocol or other electrical transformations
Include but be not limited to MODBUS-RTU agreements, it is DC 0-5V that other electrical transformations, which include but is not limited to AC 0-250V linear transformations,
Form；The three-phase output control switch include but is not limited to A.C. contactor, magnetic latching relay or other use low pressure
The switching device of Small current control high-voltage great-current；The three-phase output control switch be used for manipulate load be respectively connected to A phases,
B phases or C phases get on, and automatic control circuit includes but is not limited to relay, single-chip microcomputer, DSP/DSC, PLC, embedded system, work
Industry control computer or other automatic control circuits, and supporting control software；The remote-controlled launcher and reception device
Receive circuit including remote control, remote control, receive circuit by the remote control of manual operation remote control control is connected with automatic control circuit,
For customer charge to be accessed into a certain phase, the rectifier power source is used to three-phase high-voltage alternating current being converted to single phase low voltage direct current
Electricity.
Distribution three-phase load unbalance has the control method for carrying adjusting means automatically, comprises the following steps：Automatically control electricity
After road receives the three-phase phase voltage value that three-phase phase voltage collection transmitter is sent, three-phase phase is found out by comparing first
Mutually phase voltage maximum difference △ U=phase voltage maximums Umax- is then calculated where the maximum of voltage with phase where minimum value
Phase voltage minimum value Umin, and compared with the threshold value of setting, if phase voltage maximum difference △ U exceed threshold value, and phase where load
It is exactly voltage most low phase, then the overload of phase, control circuit will enter a random countdown mechanism, and treat where being considered as load
After random countdown terminates, if phase voltage maximum difference △ U are never revert to below threshold value, phase where being considered as load
Based model for load duration is overweight, and now control circuit is by manipulating three-phase output control switch, by the load switching controlled to current electricity
The pressure phase of highest one gets on, and operation is completed.
In order to prevent after more table apparatus are mounted with taiwan area, as the voltage decreases, more table apparatus while switchable load, give
Distribution causes more serious fluctuation, and the present apparatus introduces random countdown mechanism.When detecting that phase voltage maximum difference △ U exceed
During threshold value, control circuit randomly selects a time progress countdown among 10.0s~599.9s first, now control circuit
It will continue to gather from three-phase phase voltage and three-phase phase voltage obtained in pick-up device, detection phase voltage maximum difference △ U.In countdown
Returned to before 0, once phase voltage maximum difference △ U are returned within threshold value setting range, that is, be considered as overload state and obtain
Effective alleviation, control circuit will automatically exit from countdown state, and device is failure to actuate, only when countdown state is from starting to 0,
Phase voltage maximum difference △ U are continued for exceeding threshold value, then after countdown terminates, load that device automatically can just be controlled it
It is switched to that lighter phase of current voltage maximum load.Because the value of countdown is random, even if voltage is always
Too low, more table apparatus control customer charges will not also switch simultaneously, prevent from causing serious power network fluctuation.
Meanwhile the device, by increased manual control function, maintainer can be needed according to scene or superior command,
Using the remote control local operation present apparatus, customer charge is accessed into a certain phase, or directly cut off load.
The advantage of the present apparatus is：1st, load adjusts：, can be in the case where not having a power failure after installing and using the present apparatus, band
Customer charge completes phase modulation operation, will not cause load loss and customer complaint；2nd, automatically adjust：Device judges its control automatically
Load where a phase load it is overweight, then this all the way load switching to going in the lighter phase of load.Need not manually it look into
See monitor supervision platform；3rd, random delay：" random countdown " mechanism of introducing, prevents multichannel load while switching causes power network fluctuation；
4th, without communication：The present apparatus can pass through in-site collecting three using the three-phase phase voltage maximum difference △ U of its position as criterion
Distinguishing rule of the phase phase voltage as " load unbalanced ", rather than the current value at taiwan area transformer outlet.Therefore need not be
The measurement apparatus of three-phase current is installed at taiwan area transformer, it is not required that with other devices, other monitor supervision platforms, or in each regulation
Communicated between device, therefore, saved the expense for setting up the communication medias such as cable, optical fiber again, it is not required that lease electricity
Believe the GPRS passages of operator, greatly save cost of installation and use；5th, it is unattended：During whole distribution three-phase load, no
Need operation of manually ascending a height, no falling from high altitude, mistakenly entering charged chamber, touch electrical body by mistake, the security risk such as induced electricity is hurted sb.'s feelings, have
Effect guarantees personal safety；6th, regulation manually：Maintainer can be needed according to scene or superior command, is grasped on the spot using remote control
Make the present apparatus, customer charge is accessed into a certain phase, or directly cut off load；The present apparatus is cheap, easy for installation, structure is simple
It is single, safe and reliable, only it need to install the present apparatus additional in the entrance line T junctions of 400V overhead line structures, you can receive obvious effect.
Described above is present pre-ferred embodiments, for the ordinary skill in the art, according to the present invention's
Teaching, in the case where not departing from the principle of the present invention and spirit, the changes, modifications, replacement and the change that are carried out to embodiment
Type is still fallen within protection scope of the present invention.
Claims (8)
1. a kind of distribution three-phase load unbalance has load adjusting means automatically, it is characterised in that gathers and becomes including three-phase phase voltage
Send device, three-phase output control switch, automatic control circuit, remote-controlled launcher and reception device, rectifier power source；The three-phase phase
Voltage acquisition transmitter is used for the three-phase phase voltage for gathering present apparatus position, and by converting with communications protocol or other electricity
The form of change of variable sends three-phase phase voltage value to automatic control circuit, and the three-phase output control switch is used to manipulate load
It is respectively connected to onto A phases, B phases or C phases go, the remote-controlled launcher includes remote control with reception device, remote control receives circuit,
Receive circuit by the remote control of manual operation remote control control with automatic control circuit to be connected, it is a certain for customer charge to be accessed
Phase, the rectifier power source are used to three-phase high-voltage alternating current being converted to single phase low voltage direct current.
2. a kind of distribution three-phase load unbalance according to claim 1 has load adjusting means automatically, it is characterised in that also
Other auxiliary circuits including audible-visual annunciator, LCDs, other auxiliary circuits are by man-machine interaction signal output and certainly
Dynamic control circuit connection.
3. a kind of distribution three-phase load unbalance according to claim 1 has load adjusting means automatically, it is characterised in that institute
State three-phase output control switch include but is not limited to A.C. contactor, magnetic latching relay or other use low pressure Small current control
The switching device of high-voltage great-current.
4. a kind of distribution three-phase load unbalance according to claim 1 has load adjusting means automatically, it is characterised in that from
Dynamic control circuit include but is not limited to relay, single-chip microcomputer, DSP/DSC, PLC, embedded system, industrial control computer or its
His automatic control circuit, and supporting control software.
5. a kind of distribution three-phase load unbalance according to claim 1 has load adjusting means automatically, it is characterised in that institute
State communications protocol and include but is not limited to MODBUS-RTU agreements.
6. a kind of distribution three-phase load unbalance according to claim 1 has load adjusting means automatically, it is characterised in that its
His electrical transformation includes but is not limited to the form for DC 0-5V by AC 0-250V linear transformations.
7. a kind of distribution three-phase load unbalance as described in claim 1-6 is any has the manipulation side for carrying adjusting means automatically
Method, it is characterised in that comprise the following steps：Automatic control circuit receives three that three-phase phase voltage collection transmitter is sent
After phase phase voltage value, phase where finding out the maximum of three-phase phase voltage by comparing first and phase where minimum value, Ran Houji
Phase voltage maximum difference △ U=phase voltage maximum Umax- phase voltage minimum value Umin are calculated, and compared with the threshold value of setting, if
Phase voltage maximum difference △ U exceed threshold value, and are exactly mutually voltage most low phase where load, then the load mistake of phase where being considered as load
Weight, control circuit will enter a random countdown mechanism, after random countdown terminates, if phase voltage maximum difference △ U mono-
It does not revert to below threshold value directly, then the based model for load duration of phase is overweight where being considered as load, and now control circuit is by manipulating three-phase
Output control switch, it will be gone on the load switching controlled to the phase of current voltage highest one, operation is completed.
8. distribution three-phase load unbalance according to claim 7 has the control method for carrying adjusting means, its feature automatically
Be, the random countdown mechanism refers to when detecting that phase voltage maximum difference △ U exceed threshold value, control circuit first from
A time progress countdown is randomly selected among 10.0s~599.9s, now control circuit will continue to adopt from three-phase phase voltage
Three-phase phase voltage, detection phase voltage maximum difference △ U are obtained in collection pick-up device.Before countdown returns to 0, once phase voltage
Maximum difference △ U are returned within threshold value setting range, that is, are considered as overload state and have been obtained effective alleviation, control circuit will
Countdown state is automatically exited from, device is failure to actuate, and only when countdown state is from starting to 0, phase voltage maximum difference △ U are always
Threshold value is continued above, then after countdown terminates, the load switching that device automatically can just be controlled it is born to current voltage highest
That lighter phase of lotus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710446779.3A CN107834576B (en) | 2017-06-14 | 2017-06-14 | Automatic on-load adjusting device for unbalanced load of three phases of distribution network and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710446779.3A CN107834576B (en) | 2017-06-14 | 2017-06-14 | Automatic on-load adjusting device for unbalanced load of three phases of distribution network and control method |
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| Publication Number | Publication Date |
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| CN107834576A true CN107834576A (en) | 2018-03-23 |
| CN107834576B CN107834576B (en) | 2024-04-23 |
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| CN201710446779.3A Active CN107834576B (en) | 2017-06-14 | 2017-06-14 | Automatic on-load adjusting device for unbalanced load of three phases of distribution network and control method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109802427A (en) * | 2018-11-23 | 2019-05-24 | 赵中奇 | Photovoltaic power generation grid-connecting control system and control method |
| CN110011338A (en) * | 2019-05-07 | 2019-07-12 | 伊犁职业技术学院 | Tri-phase unbalance factor monitoring device, transformer and low-voltage network system |
| CN110957748A (en) * | 2019-12-17 | 2020-04-03 | 中国农业大学 | Three-phase voltage unbalance adjusting device and method |
| CN113933568A (en) * | 2021-08-24 | 2022-01-14 | 广西电网有限责任公司防城港供电局 | OCS (online charging System) -based transformer substation 10kV bus three-phase voltage unbalance monitoring method |
| CN114094605A (en) * | 2021-11-18 | 2022-02-25 | 广东电网有限责任公司 | Phase modulation device and method for low-voltage meter, electronic equipment and storage medium |
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| CN207069593U (en) * | 2017-06-14 | 2018-03-02 | 国网山东省电力公司枣庄供电公司 | A kind of distribution three-phase load unbalance has load adjusting means automatically |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110957748A (en) * | 2019-12-17 | 2020-04-03 | 中国农业大学 | Three-phase voltage unbalance adjusting device and method |
| CN113933568A (en) * | 2021-08-24 | 2022-01-14 | 广西电网有限责任公司防城港供电局 | OCS (online charging System) -based transformer substation 10kV bus three-phase voltage unbalance monitoring method |
| CN114094605A (en) * | 2021-11-18 | 2022-02-25 | 广东电网有限责任公司 | Phase modulation device and method for low-voltage meter, electronic equipment and storage medium |
| CN114094605B (en) * | 2021-11-18 | 2023-08-18 | 广东电网有限责任公司 | Low-voltage meter phase modulation device and method, electronic equipment and storage medium |
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| Publication number | Publication date |
|---|---|
| CN107834576B (en) | 2024-04-23 |
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