CN205725471U - Voltage regulation system - Google Patents
Voltage regulation system Download PDFInfo
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- CN205725471U CN205725471U CN201620157282.0U CN201620157282U CN205725471U CN 205725471 U CN205725471 U CN 205725471U CN 201620157282 U CN201620157282 U CN 201620157282U CN 205725471 U CN205725471 U CN 205725471U
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- frequency converter
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- 230000033228 biological regulation Effects 0.000 title claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims abstract description 54
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- 238000000034 method Methods 0.000 description 5
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
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Abstract
The utility model discloses a voltage regulation system. The voltage regulation system includes: the transformer is connected to the power transmission line and used for adjusting the voltage provided by the power transmission line to a first preset voltage, wherein the first preset voltage is smaller than the voltage provided by the power transmission line; and the frequency converter is connected with the transformer and connected to the load equipment, wherein the input of the frequency converter is a first preset voltage, the output of the frequency converter is a second preset voltage, the second preset voltage is the power supply voltage of the load equipment, and the voltage provided by the power transmission line is higher than a third preset voltage. Through the utility model discloses, the problem that the converter can not satisfy the high rotational speed requirement of load equipment has been solved.
Description
Technical field
The utility model relates to voltage-regulation field, in particular to a kind of voltage-regulating system.
Background technology
Due to low voltage motor, such as after the power of motor of 380V reaches to a certain degree, line loss consumption is big, is born by wire
Ability limits, it is difficult to doing big, during production, rule is complicated, is not easy to realize, needs to improve voltage high-power defeated to realize
Go out.Therefore, prior art generally uses the mesohigh input converters such as 10kV, but defeated at mesohighs such as 10kV
Before entering frequency converter, need to use the mode of phase-shifting transformer and multi-module cascade, therefore frequency converter bulky and
Rotating speed cannot be mentioned very high, it is impossible to meet the high-revolving requirement of centrifugal water chiller even load equipment.
The problem that can not meet load equipment height rotation speed requirements for frequency converter in correlation technique, not yet proposes effectively at present
Solution.
Utility model content
Main purpose of the present utility model is to provide a kind of voltage-regulating system, can not meet load to solve frequency converter
The problem of equipment height rotation speed requirements.
To achieve these goals, according to an aspect of the present utility model, a kind of voltage-regulating system is provided, should
System includes:
Transformer, is connected to transmission line of electricity, is used for the voltage-regulation of transmission line of electricity offer to the first predeterminated voltage, its
In, the voltage that the first predeterminated voltage provides less than transmission line of electricity；And frequency converter, it is connected with transformer, and be connected to
Load equipment, wherein, the input of frequency converter is the first predeterminated voltage, and frequency converter is output as the second predeterminated voltage, the
Two predeterminated voltages are the supply voltage of load equipment, and the voltage that transmission line of electricity provides is higher than the 3rd predeterminated voltage.
Further, this system also includes: controller, is connected with frequency converter, for obtaining the work frequency of load equipment
Rate, and the output frequency of the operating frequency regulation frequency converter according to load equipment.
Further, this system also includes: first processor, is connected with transformer, for determining the first predeterminated voltage
Numerical value, wherein, the numerical value of the first predeterminated voltage that transformer determines according to first processor is by medium-high voltage transmission lines road
The voltage-regulation providing is to the first predeterminated voltage.
Further, this system also includes: the second processor, is connected with frequency converter, for determining the second predeterminated voltage
Numerical value, wherein, the first predeterminated voltage is adjusted by frequency converter according to the numerical value of the second predeterminated voltage that the second processor determines
Joint is to the second predeterminated voltage.
Further, this system also includes: feedback regulator, is connected with transformer, is connected with the output of frequency converter,
For receiving the output voltage of frequency converter, and the output voltage of the output voltage regulation transformer according to frequency converter.
Further, transmission line of electricity is for providing the transmission line of electricity of 3-12KV voltage, and the first predeterminated voltage is 660V-720V.
Further, frequency converter is output as the second predeterminated voltage, and the second predeterminated voltage is 0-720V.
Further, load equipment is compressor electric motor, and described transmission line of electricity is medium-high voltage transmission lines road.
Further, compressor electric motor rotating speed is more than or equal to 8000 turns.
Further, this system also includes: the first switch, is positioned between transmission line of electricity and transformer, is used for controlling change
The disconnection of depressor and transmission line of electricity be connected；Second switch, is positioned between transformer and frequency converter, is used for controlling transformation
The disconnection of device and frequency converter be connected；3rd switch, is positioned between frequency converter and load equipment, is used for controlling frequency converter
Disconnection with load equipment be connected.
The utility model passes through transformer, is connected to transmission line of electricity, for the voltage-regulation that provides transmission line of electricity to the
One predeterminated voltage, wherein, the first predeterminated voltage is less than the voltage of transmission line of electricity offer；And frequency converter, with transformer
Connecting, and being connected to load equipment, wherein, the input of frequency converter is the first predeterminated voltage, and frequency converter is output as the
Two predeterminated voltages, the second predeterminated voltage is the supply voltage of load equipment, and the voltage that transmission line of electricity provides is pre-higher than the 3rd
If voltage, solve frequency converter and can not meet the problem of load equipment height rotation speed requirements, and then after having reached to reduce
Voltage input converter, it is not necessary to use phase-shifting transformer and multi-module cascade, decrease the volume of frequency converter, it is thus possible to
Enough by rotating speed raising, it is achieved that to meet the effect of load equipment height rotation speed requirements.
Brief description
A part of accompanying drawing constituting the application is used for providing being further appreciated by of the present utility model, of the present utility model
Schematic description and description is used for explaining the utility model, is not intended that to improper restriction of the present utility model.?
In accompanying drawing:
Fig. 1 is the schematic diagram of the voltage-regulating system according to the utility model first embodiment；And
Fig. 2 is the schematic diagram of the voltage-regulating system according to the utility model the second embodiment.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can phases
Combination mutually.Describe the utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
In order to make those skilled in the art be more fully understood that the application scheme, below in conjunction with in the embodiment of the present application
Accompanying drawing, is clearly and completely described to the technical scheme in the embodiment of the present application, it is clear that described embodiment
It is only a part of embodiment of the application, rather than whole embodiments.Based on the embodiment in the application, ability
The every other embodiment that territory those of ordinary skill is obtained under the premise of not making creative work, all should belong to
The scope of the application protection.
It should be noted that term " first " in the description and claims of this application and above-mentioned accompanying drawing, "
Two " it is etc. for distinguishing similar object, without being used for describing specific order or precedence.Should be appreciated that this
The data that sample uses can be exchanged in the appropriate case, in order to embodiments herein described herein.Additionally, term
" include " and " having " and their any deformation, it is intended that cover non-exclusive comprising, for example, comprise
The process of series of steps or unit, method, system, product or equipment are not necessarily limited to those steps clearly listed
Rapid or unit, but can include that clearly do not list or intrinsic for these processes, method, product or equipment
Other steps or unit.
The utility model embodiment provides a kind of voltage-regulating system.
Fig. 1 is the schematic diagram of the voltage-regulating system according to the utility model first embodiment, as it is shown in figure 1, this is
System includes transformer 10 and frequency converter 20.
Transformer 10, is connected to transmission line of electricity, presets electricity for the voltage-regulation providing described transmission line of electricity to first
Pressure, wherein, the first predeterminated voltage is less than the voltage of described transmission line of electricity offer.
Transformer 10 is the device utilizing electromagnetic induction principle to change alternating voltage, and major function is voltage transformation, mainly
Structure includes primary coil, secondary coil and iron core etc..Medium-high voltage transmission lines road can be that voltage exceedes predeterminated voltage
Transmission line of electricity, transformer 10 can be connected to electrical network, and for example, transformer 10 can be connected to the middle height that urban district powers
The medium-high voltage transmission lines road of voltage electric grid, it is also possible to the mesohigh electricity power transmission line etc. being connected in laboratory, mesohigh electrical network
Voltage can be the voltage of 3-12KV, it is also possible to be the voltage of the voltage of higher numerical value or slightly lower numerical value.
The voltage that medium-high voltage transmission lines road provides is adjusted by transformer 10, makes voltage drop the as little as first predeterminated voltage,
Wherein, the voltage that the first predeterminated voltage provides much smaller than medium-high voltage transmission lines road, the first predeterminated voltage can be
660V-720V, it is also possible to be the voltage of other default numerical value, for example, the first predeterminated voltage can be 500V or
800V etc., in the optional application scenarios of one, the 3-12KV that medium-high voltage transmission lines road is provided by transformer 10 is electric
Pressure is regulated to 660V-720V.Wherein, the numerical value of the first predeterminated voltage can be that potential device sets when dispatching from the factory, also
Regulation signal can be received and be adjusted according to regulation signal, can also is that according to load equipment for voltage
Concrete needs are arranged flexibly.
Frequency converter 20, is connected with transformer 10, and is connected to load equipment, and wherein, the input of frequency converter 20 is
One predeterminated voltage, frequency converter 20 is output as the second predeterminated voltage, and the second predeterminated voltage is the supply voltage of load equipment,
The voltage that transmission line of electricity provides is higher than the 3rd predeterminated voltage.
Frequency converter 20 can adjust voltage and the frequency of output voltage by changing the frequency shift voltage of power supply.
In the present embodiment, the input of frequency converter 20 is connected to the output of potential device, the output of frequency converter 20 with
Load equipment connects, after the voltage-regulation that medium-high voltage transmission lines road is provided by transformer 10 to the first predeterminated voltage,
Frequency converter 20 regulates the first predeterminated voltage to the second predeterminated voltage, for example, by the voltage-regulation of 660V-720V extremely
Second predeterminated voltage of 0-720V, when by the first predeterminated voltage regulation to the second predeterminated voltage, the second predeterminated voltage
Numerical value also can receive regulation signal and be adjusted according to regulation signal, it is also possible to according to load equipment for electricity
The concrete needs of pressure is arranged flexibly.Frequency converter 20 can enter line frequency tune according to load equipment for the requirement of frequency
Joint, so that the frequency powering load equipment meets the requirement of load equipment.
Load equipment can be compressor electric motor, it is also possible to being other electric equipments, alternatively, compressor electric motor is permissible
It is the compressor electric motor that rotating speed is more than or equal to 8000 turns.The voltage providing medium-high voltage transmission lines road at transformer 10 is adjusted
Saving after the first predeterminated voltage, frequency converter 20 can not use shifts to transformer and multi-module cascade, thus can be with body
Long-pending without too big, rotating speed can be mentioned higher numerical value, disclosure satisfy that the high-revolving demand of load equipment.
Transformer 10 and frequency converter 20 can be applied high-power, to load appliance in high voltage and high-frequency circuit
Power supply be adjusted.
Alternatively, this system also includes controller, is connected with frequency converter 20, for obtaining the operating frequency of load equipment,
And the output frequency of the operating frequency regulation frequency converter 20 according to load equipment.Controller obtains the work frequency of load equipment
After rate, the output frequency of operating frequency according to load equipment regulation frequency converter 20 is so that the output frequency of frequency converter 20
Reach the operating frequency of load equipment.When controller obtains the operating frequency of load equipment, load equipment can be detected
Operating frequency, it is also possible to communicate with load equipment, receives the operating frequency that load equipment sends, can also pass through
Other modes, for example, receive the mode being manually entered and obtain the operating frequency of load equipment.By obtaining load equipment
Operating frequency, then according to load equipment operating frequency regulation frequency converter 20 output frequency, frequency converter can be made
The output frequency of 20 more meets the requirement of load equipment, improves the operating efficiency of load equipment, reduces the waste of electric energy,
The work making frequency converter 20 is more intelligent.
Alternatively, this system also includes first processor, is connected with transformer 10, for determining the first predeterminated voltage
Numerical value, wherein, the numerical value of the first predeterminated voltage that transformer 10 determines according to first processor is by medium-high voltage transmission lines road
The voltage-regulation providing is to the first predeterminated voltage.Wherein, first processor can according to the operating voltage of load equipment and
Operating frequency determines the numerical value of the first predeterminated voltage by preset algorithm, after the numerical value determining the first predeterminated voltage, becomes
The voltage that medium-high voltage transmission lines road is provided by the numerical value of the first predeterminated voltage that depressor 10 determines according to first processor is adjusted
Joint is to the first predeterminated voltage.
Alternatively, this system also includes the second processor, is connected with frequency converter 20, for determining the second predeterminated voltage
Numerical value, wherein, the first predeterminated voltage is adjusted by frequency converter 20 according to the numerical value of the second predeterminated voltage that the second processor determines
Joint is to the second predeterminated voltage.Wherein, the second processor can according to the operating voltage of load equipment and operating frequency and
First predeterminated voltage determines the numerical value of the second predeterminated voltage by preset algorithm, after the numerical value determining the second predeterminated voltage,
The numerical value of the second predeterminated voltage that frequency converter 20 determines according to the second processor by the first predeterminated voltage regulation to second pre-
If voltage, the second predeterminated voltage can be the operating voltage of load equipment.
Alternatively, this system also includes feedback regulator, is connected with transformer 10, connects with the output of frequency converter 20
Connect, be used for receiving the output voltage of frequency converter 20, and regulate the defeated of transformer 10 according to the output voltage of frequency converter 20
Go out voltage.Feedback regulator can be controller, and feedback regulator receives the output voltage of the output of frequency converter 20,
The transformation scope of regulation transformer 10, makes the output voltage of frequency converter 20 meet preset standard.Connect at feedback regulator
When the output voltage of the output receiving frequency converter 20 is less than setting value, improve the defeated of transformer 10 according to preset algorithm
Go out voltage；Receive at feedback regulator frequency converter 20 output output voltage higher than setting value when, according to preset
Algorithm reduces the output voltage of transformer 10.It is adjusted by the voltage to transformer 10 for the feedback regulator, can
Improve the accuracy of voltage-regulation, reduce the waste of electric energy.
Alternatively, this system also includes: the first switch, is positioned between medium-high voltage transmission lines road and transformer 10, is used for
The disconnection on control transformer 10 and medium-high voltage transmission lines road be connected；Second switch, is positioned at transformer 10 and frequency converter
Between 20, for controlling the disconnection of transformer 10 and frequency converter 20 and being connected；3rd switch, is positioned at frequency converter 20
And between load equipment, for controlling the disconnection of frequency converter 20 and load equipment and being connected.On medium-high voltage transmission lines road and
First switch is set between transformer 10, the disconnection on transformer 10 and medium-high voltage transmission lines road can be controlled and be connected,
Improve the security of circuit；Second switch is set between transformer 10 and frequency converter 20 and can control transformer 10
Disconnection with frequency converter 20 be connected, can in time cut off electricity when frequency converter 20 or transformer 10 occur abnormal
Road connects, and improves the security of circuit；Arranging the 3rd switch between frequency converter 20 and load equipment can be at frequency converter
20 or load equipment when occurring abnormal, cut off circuit in time and connect, to overhaul, improve the security of circuit.
This embodiment passes through transformer 10, is connected to transmission line of electricity, for the voltage-regulation that provides transmission line of electricity to the
One predeterminated voltage, frequency converter 20, it is connected with transformer 10, and be connected to load equipment, wherein, frequency converter 20
Input is the first predeterminated voltage, and frequency converter 20 is output as the second predeterminated voltage, and the second predeterminated voltage is load equipment
Supply voltage, solves frequency converter 20 and can not meet the problem of load equipment height rotation speed requirements, and then reached to reduce
After voltage input converter 20, it is not necessary to use phase-shifting transformer and multi-module cascade, decrease the body of frequency converter 20
Long-pending such that it is able to rotating speed to be improved, it is achieved that meet the effect of load equipment height rotation speed requirements.
Fig. 2 is the schematic diagram of the voltage-regulating system according to the utility model the second embodiment, as in figure 2 it is shown, this is
System includes transformer 10, frequency converter 20 and compressor electric motor 30.
Transformer 10, is connected to medium-high voltage transmission lines road, for the voltage-regulation that provides medium-high voltage transmission lines road to the
One predeterminated voltage.
In the present embodiment, transformer 10 can be connected with the electrical network of 3-12KV, and transformer 10 is by the electricity of 3-12KV
Pressure regulation is to the first predeterminated voltage, and the first predeterminated voltage is 660V-720V.Transformer 10 can also be with multiple for adjusting
Joint or the integrated potential device of device of control transformer 10, more multi-functional to realize.
Frequency converter 20, is connected with transformer 10, and is connected to load equipment, and wherein, the input of frequency converter 20 is
One predeterminated voltage, frequency converter 20 is output as the second predeterminated voltage, and the second predeterminated voltage is the supply voltage of load equipment.
Frequency converter 20 can also be right to realize with multiple integrated converter plants of device for regulating or controlling frequency converter 20
More multi-functional in the regulation of frequency or monitoring etc..
Compressor electric motor 30, is connected with frequency converter 20.
The load equipment of this voltage-regulating system can be compressor electric motor 30, and for example, rotating speed is more than or equal to 8000 turns
Compressor electric motor 30, it is also possible to be other kinds of electric equipment, such as large fan, air-conditioning, refrigerator etc., right
The control of load compressor motor etc. uses the mode of frequency conversion drive, by the voltage-regulation system of the utility model embodiment
System can meet electrical equipment and require for high-power and high rotating speed etc., and therefore load equipment can be large industry equipment etc..
In the present embodiment, frequency converter 20 is by the voltage-regulation of 660V-720V to the second predeterminated voltage, and second presets
Voltage can be 0-720V, that is, frequency converter 20 can realize boosting, it is also possible to realize step-down, at frequency converter 20
During regulation voltage, can be adjusted according to the operating voltage of load equipment, for example, the work electricity of compressor electric motor 30
Pressure be 500V, then frequency converter 20 by the voltage-regulation of 660V-720V to 500V, that is, the second predeterminated voltage is
500V, powers to compressor electric motor 30 with 500V.
For example, the voltage of electrical network 10KV is adjusted to 660V by transformer 10, then by frequency converter 20 by voltage-regulation
To 500V, with the voltage of 500V, compressor electric motor 30 is powered, be capable of compressor electric motor 30 for high efficiency,
High rotating speed and the requirement of powerful mesohigh frequency conversion system.
This embodiment uses transformer 10, is connected to transmission line of electricity, for the voltage-regulation that provides transmission line of electricity to the
One predeterminated voltage, frequency converter 20, it is connected with transformer 10, and be connected to load equipment, wherein, frequency converter 20
Input is the first predeterminated voltage, and frequency converter 20 is output as the second predeterminated voltage, and the second predeterminated voltage is load equipment
Supply voltage, solves frequency converter 20 and can not meet the problem of load equipment height rotation speed requirements, and then reached satisfied negative
The effect of load equipment height rotation speed requirements.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for this
For the technical staff in field, the utility model can have various modifications and variations.All in spirit of the present utility model and
Within principle, any modification, equivalent substitution and improvement etc. made, should be included in protection domain of the present utility model
Within.
Claims (10)
1. a voltage-regulating system, it is characterised in that include:
Transformer, is connected to transmission line of electricity, for presetting the voltage-regulation that described transmission line of electricity provides to first
Voltage, wherein, the first predeterminated voltage is less than the voltage of described transmission line of electricity offer；And
Frequency converter, is connected with described transformer, and is connected to load equipment, wherein, and the input of described frequency converter
For described first predeterminated voltage, described frequency converter is output as the second predeterminated voltage, and the second predeterminated voltage is described
The supply voltage of load equipment, the voltage that described transmission line of electricity provides is higher than the 3rd predeterminated voltage.
2. system according to claim 1, it is characterised in that described system also includes:
Controller, is connected with described frequency converter, is used for obtaining the operating frequency of described load equipment, and according to institute
State the output frequency of the described frequency converter of operating frequency regulation of load equipment.
3. system according to claim 1, it is characterised in that described system also includes:
First processor, is connected with described transformer, for determining the numerical value of described first predeterminated voltage, wherein,
Described transformer is used for the numerical value of described first predeterminated voltage according to the determination of described first processor by described transmission of electricity
The voltage-regulation that circuit provides is to described first predeterminated voltage.
4. system according to claim 1, it is characterised in that described system also includes:
Second processor, is connected with described frequency converter, for determining the numerical value of described second predeterminated voltage, wherein,
Described frequency converter is preset described first according to the numerical value of described second predeterminated voltage that described second processor determines
Voltage-regulation is to described second predeterminated voltage.
5. system according to claim 1, it is characterised in that described system also includes:
Feedback regulator, is connected with described transformer, is connected with the output of described frequency converter, is used for receiving institute
State the output voltage of frequency converter, and the output voltage of the described transformer of output voltage regulation according to described frequency converter.
6. system according to claim 1, it is characterised in that described transmission line of electricity is for providing 3-12KV voltage
Transmission line of electricity, described first predeterminated voltage is 660V-720V.
7. system according to claim 6, it is characterised in that described frequency converter is output as the second predeterminated voltage,
Described second predeterminated voltage is 0-720V.
8. system according to claim 1, it is characterised in that described load equipment is compressor electric motor, described defeated
Electric line is medium-high voltage transmission lines road.
9. system according to claim 8, it is characterised in that described compressor electric motor rotating speed is more than or equal to 8000
Turn.
10. system according to claim 1, it is characterised in that described system also includes:
First switch, is positioned between described transmission line of electricity and described transformer, is used for controlling described transformer and institute
State the disconnection of transmission line of electricity and be connected；
Second switch, is positioned between described transformer and described frequency converter, be used for controlling described transformer with described
The disconnection of frequency converter be connected；And
3rd switch, is positioned between described frequency converter and described load equipment, is used for controlling described frequency converter and institute
State the disconnection of load equipment and be connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620157282.0U CN205725471U (en) | 2016-02-29 | 2016-02-29 | Voltage regulation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620157282.0U CN205725471U (en) | 2016-02-29 | 2016-02-29 | Voltage regulation system |
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| CN205725471U true CN205725471U (en) | 2016-11-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105763069A (en) * | 2016-02-29 | 2016-07-13 | 珠海格力电器股份有限公司 | Voltage regulation system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105763069A (en) * | 2016-02-29 | 2016-07-13 | 珠海格力电器股份有限公司 | Voltage regulation system and method |
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