CN206878465U - Dynamic compensating device temporarily drops in a kind of novel voltage - Google Patents
Dynamic compensating device temporarily drops in a kind of novel voltage Download PDFInfo
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- CN206878465U CN206878465U CN201720724374.7U CN201720724374U CN206878465U CN 206878465 U CN206878465 U CN 206878465U CN 201720724374 U CN201720724374 U CN 201720724374U CN 206878465 U CN206878465 U CN 206878465U
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- inverter
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- transformer
- energy storage
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Abstract
The utility model provides a kind of novel voltage and temporarily drops dynamic compensating device, including energy storage taking energy unit, inverter, filter unit, transformer and switch element, first switch one end connects the 4th switch and system voltage respectively, the input of the other end and transformer connects, the output end of transformer connects with the 3rd switch, the 3rd switch connected load；Second switch and transformers connected in parallel；4th switch one end is connected with first switch and system voltage respectively, the other end is connected with energy storage taking energy unit input, the input of the output end connection inverter of energy storage taking energy unit, the output end of inverter are connected with filter unit, filter unit and transformer series.The utility model uses bypass type mode of operation, when system voltage is normal control power supply is provided by system, system voltage can be rapidly switched to the power supply of device energy-storage system when temporarily dropping generation, improve the reliability of current supply circuit, while improve reliability and the flexibility of offset voltage.
Description
Technical field
A kind of compensation device is the utility model is related to, more particularly to dynamic compensating device temporarily drops in a kind of novel voltage.
Background technology
In various power quality problems, voltage dip is the main reason for causing voltage sensitive equipment abnormal work, is led to
Often it is believed that 70%~90% power quality problem is as caused by voltage dip, and voltage dip is due to thunderbolt and transmission of electricity more
Line short fault causes.Startup of induction conductivity etc. can also cause the voltage dip that amplitude is smaller, the time is longer, by adopting
Take adequate measures to change the Starting mode of induction conductivity, can effectively eliminate the unfavorable of voltage dip caused by electric motor starting
Influence.
With the development of society, sensitive load increases rapidly, capacity is also increasing, voltage class also more and more higher, this
So that the direction of DVR towards Large Copacity, high pressure, high reliability, high flexibility is developed.Dynamic electric voltage recovery device DVR is exactly to connect
A kind of auxiliary equipment between system side and user side, it has very high flexibility and good economy, application prospect
It is boundless.The property indices of DVR devices are improved, to improving the quality of power supply, ensure the normal table operation of sensitive load
It is significant.
Utility model content
To overcome the deficiencies in the prior art, the utility model provides a kind of novel voltage and temporarily drops dynamic compensating device, uses
To solve the voltage dip compensation problem of power system.
The utility model uses following technical scheme：
Dynamic compensating device temporarily drops in a kind of novel voltage, wherein, including energy storage taking energy unit, inverter, filter unit, change
Depressor and switch element, the switch element include first switch, second switch, third switch and the 4th and switched, and described first
Switch one end connects the 4th switch and system voltage respectively, and the input of the other end and transformer connects, the transformer it is defeated
Go out end to connect with the 3rd switch, the 3rd switch connected load；The second switch and transformers connected in parallel；Described 4th switch one end
It is connected respectively with first switch and system voltage, the other end is connected with energy storage taking energy unit input, the energy storage taking energy unit
Output end connection inverter input, the output end of the inverter be connected with filter unit, the filter unit and change
Depressor is connected.
Preferably, the energy storage taking energy unit is ultracapacitor.
Preferably, the second switch is TRIAC.
Preferably, the inverter is Cascade H bridge type inverter.
The beneficial effects of the utility model are as follows：
Using the quick gapless switching of pure power electronics, it is superfluous that high speed bypasses the utility model, two-way inverter realizes three
Remaining design, reliability is high, wiring is simple, while plays the protection to controlling power supply, using ultracapacitor energy storage, service life
More than 15 years.
The utility model uses bypass type mode of operation, and control power supply, system electricity are provided by system when system voltage is normal
Pressure can be rapidly switched to the power supply of device energy-storage system when temporarily drop occurs, improve the reliability of current supply circuit, while improve benefit
Repay reliability and the flexibility of voltage.Voltage compensation scope is up to 0~200% rated voltage, the sine wave of 100% rated voltage
Output.
Brief description of the drawings
Accompanying drawing is used for providing further understanding to of the present utility model, and a part for constitution instruction, with this practicality
New embodiment is used to explain the utility model together, does not form to limitation of the present utility model.
Fig. 1 is the structural representation that dynamic compensating device temporarily drops in a kind of novel voltage of the utility model.
Embodiment
Preferred embodiment of the present utility model is illustrated below in conjunction with accompanying drawing, it will be appreciated that described herein excellent
Select embodiment to be merely to illustrate and explain the utility model, be not used to limit the utility model.
As shown in figure 1, present embodiments providing a kind of novel voltage temporarily drops dynamic compensating device, including energy storage taking energy unit
8th, inverter 6, filter unit 7, transformer 5 and switch element, switch element includes first switch 1, second switch the 2, the 3rd is opened
Close 3 and the 4th and switch 4, second switch 2 is TRIAC.
The one end of first switch 1 connection system voltage 9 and the 4th switch 4, the other end is connected with the input of transformer 5, is become
The output end of depressor 5 is connected with the 3rd switch 3, and the 3rd 3 connected loads of switch, the both ends of second switch 2 are connected in parallel on transformer 5
On.4th 4 one end of switch are connected with first switch 1, system voltage 9 respectively, and the other end connects with the input of energy storage taking energy unit 8
Connect, the input of the output end connection inverter 6 of energy storage taking energy unit 8, the output end of inverter 6 is connected with filter unit 7, filtered
Ripple unit 7 is connected with transformer 5.
In the embodiment, energy storage taking energy unit 8 is ultracapacitor, and the 4th switch is triac member
Part；Inverter 6 is Cascade H bridge type inverter.
Energy exchange can be carried out between the utility model and system, energy storage taking energy unit 8 is used to provide energy, main to utilize
Bulky capacitor energy storage, using uncontrollable rectification provide energy, superconducting energy storage and some other energy storage modes by power network.Inverter
6 pass through offset voltage needed for the inversion generation system of the DC voltage provided energy storage taking energy unit 8.The effect of filter unit 7
It is to eliminate the higher hamonic wave as caused by inverter 6, offset voltage needed for system is tried one's best " pure ".The series transformer of output end
5 be the utility model and the coupling unit of system, typically using the form of series connection.
The voltage dip that the utility model is used for power system compensates, and inverter 6 uses Cascade H bridge type multi-level inverse conversion
Device, using SPWM technologies, inverter 6 is set to obtain higher equivalent switching frequency and relatively low switching loss, further lifting
The runnability of inverter；Inverter 6 is rotated using current inner loop and the control structure of outer voltage two close cycles based on synchronous speed
The real-time tracking to load voltage and compensation can be achieved in current inner loop PI controls under coordinate system, it is ensured that load voltage is maintained at volume
Definite value, improve the power supply reliability of load voltage；The improvement ratio resonance MPR that outer voltage uses is controlled at resonant frequency
Open-loop gain is infinitely great, can realize zero steady state error control and compensation to specifying subharmonic voltage in power system, avoid simultaneously
Complicated coordinate transform, uneoupled control and feedforward compensation control in conventional ratio resonance PR controls and multiple PI control strategies
System, simplifies system complexity.
The utility model uses bypass type mode of operation, and control power supply, system electricity are provided by system when system voltage is normal
Pressure can be rapidly switched to the power supply of device energy-storage system when temporarily drop occurs, improve the reliability of current supply circuit.Voltage compensation scope
Up to 0~200% rated voltage, the sinewave output of 100% rated voltage.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc., guarantor of the present utility model should be included in
Within the scope of shield.
Claims (4)
1. dynamic compensating device temporarily drops in a kind of novel voltage, it is characterised in that：It is single including energy storage taking energy unit, inverter, filtering
Member, transformer and switch element, the switch element includes first switch, second switch, third switch and the 4th switch, described
First switch one end connects the 4th switch and system voltage, the input connection of the other end and transformer, the transformer respectively
Output end with the 3rd switch connect, the 3rd switch connected load；The second switch and transformers connected in parallel；4th switch
One end is connected with first switch and system voltage respectively, and the other end is connected with energy storage taking energy unit input, and the energy storage takes energy
The input of the output end connection inverter of unit, the output end of the inverter are connected with filter unit, the filter unit
With transformer series.
2. dynamic compensating device temporarily drops in novel voltage according to claim 1, it is characterised in that：The energy storage taking energy unit
For ultracapacitor.
3. dynamic compensating device temporarily drops in novel voltage according to claim 1, it is characterised in that：The second switch is three
Hold bi-directional thyristor switch element.
4. dynamic compensating device temporarily drops in novel voltage according to claim 1, it is characterised in that：The inverter is cascade
H bridge type inverters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720724374.7U CN206878465U (en) | 2017-06-20 | 2017-06-20 | Dynamic compensating device temporarily drops in a kind of novel voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720724374.7U CN206878465U (en) | 2017-06-20 | 2017-06-20 | Dynamic compensating device temporarily drops in a kind of novel voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206878465U true CN206878465U (en) | 2018-01-12 |
Family
ID=61333545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720724374.7U Expired - Fee Related CN206878465U (en) | 2017-06-20 | 2017-06-20 | Dynamic compensating device temporarily drops in a kind of novel voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206878465U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112653162A (en) * | 2020-12-17 | 2021-04-13 | 广东电网有限责任公司广州供电局 | Voltage sag compensation apparatus and method |
-
2017
- 2017-06-20 CN CN201720724374.7U patent/CN206878465U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112653162A (en) * | 2020-12-17 | 2021-04-13 | 广东电网有限责任公司广州供电局 | Voltage sag compensation apparatus and method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180112 Termination date: 20200620 |
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| CF01 | Termination of patent right due to non-payment of annual fee |