CN207381981U - Voltage dip compensation device - Google Patents
Voltage dip compensation device Download PDFInfo
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- CN207381981U CN207381981U CN201721474759.9U CN201721474759U CN207381981U CN 207381981 U CN207381981 U CN 207381981U CN 201721474759 U CN201721474759 U CN 201721474759U CN 207381981 U CN207381981 U CN 207381981U
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Abstract
The utility model provides a kind of voltage dip compensation device, includes：Voltage monitoring unit, main control unit, AC/DC converters, DC/AC converters, energy-storage units；The input terminal of AC/DC converters is electrically connected with system power supply, and output terminal is electrically connected with energy-storage units；The input terminal of DC/AC converters is electrically connected with energy-storage units, and the output terminal of DC/AC converters is connected by coupling coil with the power end loaded；Voltage monitoring unit is electrically connected with system power supply；Main control unit is electrically connected with voltage monitoring unit；Main control unit is electrically connected with the control terminal of DC/AC converters, and when the voltage value of system power supply is less than default supply voltage limit value, the control terminal of main control unit to DC/AC converters sends control signal.The voltage dip compensation device can realize rapidly the compensation to load power source voltage when voltage dip occurs for system power supply, avoid load supplying insufficient.
Description
Technical field
The utility model is related to supply voltage compensation technique field, more particularly to a kind of voltage dip compensation device.
Background technology
Voltage dip (also known as voltage dip, voltage sag or Voltage Drop) refers to that system power supply (for example, power grid) is powered
The virtual value of voltage declines the phenomenon that recovering of ging up again suddenly in a short time.The duration of this phenomenon is most in power grid
For 0.5-1.5 seconds.
The reason for forming voltage dip mainly includes：The adverse weather conditions such as the failure of system element or circuit, thunder and lightning are all
The unexpected startup of more line short and heavy loads, the unexpected ripple of the unstable energy (such as solar power station, wind power station)
It is dynamic, it is characterized in that rapid drawdown amplitude is big, almost rectangular curve, duration are short (i.e. the On-line Fault time is short).
With the continuous development of national economy, various sensitive instrument and equipments come into operation, the requirement to quality of voltage
Higher and higher, influence of the voltage dip in relevant industry and equipment is also increasing, and particularly following industry is caused very
Big loss, for example, in auto manufacturing, for the very high current auto manufacturing of the degree of automation, due to automobile making
It is universal largely using industrial robot in journey, metal parts is bored by robot control, is cut etc. precision optical machineries processing or
During spraying equipment, in the event of voltage dip event, robot maloperation can be caused, causes product rejection；In semiconductor, precision
In the industries such as electronics, voltage dip, which occurs, can cause semiconductor equipment manufacturing process to be forced to stop, and large-tonnage product is scrapped, single thing
Therefore economic loss may be up to millions of members to more than one hundred million RMB；In the fields such as mobile communication, communications equipment room, when occurring, voltage is rapid
During drop drop, communication failure is caused, irremediable loss will be caused when serious.
In the prior art, to the indemnifying measure of voltage dip, the compensation device based on system power supply is often used, i.e.
When voltage decline occurs for system power supply, system power supply is utilized to carry out voltage compensation.Because the voltage rapid decrease of system power supply,
The spread of voltage of system power supply, therefore, compensation effect is bad, and compensation circuit is complicated, of high cost.
Utility model content
The technical problems to be solved in the utility model is that voltage dip occurs to system power supply in the prior art in order to overcome
When indemnifying measure effect is bad, the defects of compensation device is of high cost, provide a kind of low cost, be quick on the draw, compensation effect
Stable voltage dip compensation device.
The utility model is to solve above-mentioned technical problem by following technical proposals：
A kind of voltage dip compensation device, includes：Voltage monitoring unit, main control unit, AC/DC converters (exchange-
Direct current transducer), DC/AC converters (DC-AC converter), energy-storage units；
The input terminal of AC/DC converters is electrically connected with system power supply, and output terminal is electrically connected with energy-storage units；
The input terminal of DC/AC converters is electrically connected with energy-storage units, the output terminals of DC/AC converters by coupling coil with
The power end connection of load；
Voltage monitoring unit is electrically connected with system power supply, for monitoring the voltage value of system power supply；
Main control unit is electrically connected with voltage monitoring unit, for obtaining the voltage value of system power supply；
Main control unit is electrically connected with the control terminal of DC/AC converters, when the voltage value of system power supply is less than default power supply
During voltage limits, the control terminal of main control unit to DC/AC converters sends control signal, and control signal is used to open DC/AC
Converter, energy-storage units pass sequentially through DC/AC converters and coupling coil and provide electric energy for load.
It is preferred that the input terminal of AC/DC converters is electrically connected by a switch with system power supply, main control unit and switch
Electrical connection, for controlling being turned on or off for switch.
It is preferred that voltage monitoring unit is also electrically connected with energy-storage units, for monitoring the voltage value of energy-storage units；
Main control unit is additionally operable to obtain the voltage value of energy-storage units；When the voltage value of energy-storage units is less than default energy storage electricity
When pressing limit value, main control unit is by switch conduction.
It is preferred that when the voltage value of energy-storage units reaches specified tank voltage value, main control unit will be switched and disconnected.
It is preferred that DC/AC converters are the DC/AC converters comprising thyristor.
It is preferred that voltage dip compensation device, also comprising display unit, display unit is electrically connected with main control unit, is used for
The voltage value of display system power supply.
It is preferred that energy-storage units include capacitor.
It is preferred that the rated capacitance of capacitor is 2400 microfarads, rated voltage is 800 volts.
The positive effect of the utility model is：The voltage dip compensation device of the utility model is sent out in system power supply
During raw voltage dip, the compensation to load power source voltage can be realized rapidly, avoid load supplying insufficient, and the utility model
Voltage dip compensation device cost it is relatively low.
Description of the drawings
Fig. 1 is the structure diagram of the voltage dip compensation device of a preferred embodiment of the utility model.
Specific embodiment
It names a preferred embodiment, and becomes apparent from intactly illustrating the utility model with reference to attached drawing.
The voltage dip compensation device of the present embodiment, as shown in Figure 1, including voltage monitoring unit 101, main control unit
102nd, AC/DC converters 103, DC/AC converters 104, energy-storage units 105.The input terminal of AC/DC converters 103 and system electricity
Source 2 is electrically connected, and output terminal is electrically connected with energy-storage units 105；The input terminal of DC/AC converters 104 is electrically connected with energy-storage units 105
It connects, the output terminal of DC/AC converters 104 is connected by coupling coil L with the power end of load 3.Voltage monitoring unit 101 is with being
System power supply 2 is electrically connected, for monitoring the voltage value of system power supply 2.Voltage monitoring unit 101 is examined using voltage of the prior art
Slowdown monitoring circuit or commercially available voltage checking chip are realized.Main control unit 102 is electrically connected with voltage monitoring unit 101, for obtaining
Take the voltage value of system power supply 2；Main control unit 102 is electrically connected with the control terminal of DC/AC converters 104, when system power supply 2
When voltage value is less than default supply voltage limit value, the control terminal of main control unit 102 to DC/AC converters 104 sends control letter
Number, for control signal for opening DC/AC converters 104, energy-storage units 105 pass sequentially through DC/AC converters 104 and coupling coil
L provides electric energy for load 3.Main control unit 102 is using commercially available CPU (central processing unit), PLC (programmable logic controller (PLC))
It realizes；Comparison to the voltage value and default supply voltage limit value of system power supply 2, is realized using logic circuits such as comparators.
The alternating current of system power supply 2 is converted into direct current by AC/DC converters 103, charges for energy-storage units 105.
In normal state, main control unit 102 is closed DC/AC converters 104.When the generation voltage of system power supply 2 is rapid
During drop, voltage monitoring unit 101 monitors that the voltage of system power supply 2 is decreased below default supply voltage limit value (for example, normal
The 95% of 2 voltage of system power supply) when, main control unit 102 opens DC/AC converters 104, the DC voltage of energy-storage units 105
The alternating voltage identical with normal 2 voltage of system power supply is converted to by DC/AC converters 104, which passes through coupling line
Circle is load supplying coupled to the power end of load.Although voltage dip occurs for system power supply 2, energy-storage units 105 are load
Stable voltage is provided, avoids load because the voltage dip of system power supply 2 causes damages to be abnormal.
As shown in Figure 1, the input terminal of AC/DC converters 103 is electrically connected by a switch K with system power supply 2, main control list
Member 102 is electrically connected with switch K, for controlling being turned on or off for switch K.In normal state, the control of main control unit 102 is opened
K conductings are closed, are charged to energy-storage units 105；After a preset time, the electric energy of energy-storage units 105 is full of, main control
The control switch of unit 102 K is disconnected, and stops charging for energy-storage units 105.Further, voltage monitoring unit 101 also with energy storage list
Member 105 is electrically connected, for monitoring the voltage value of the energy-storage units 105.Main control unit 102 is additionally operable to obtain energy-storage units
105 voltage value.When the voltage value of energy-storage units 105 is less than default tank voltage limit value (for example, energy-storage units 105 is specified
The 90% of voltage value) when, main control unit 102 will switch K conductings, charge for energy-storage units 105；When the electricity of energy-storage units 105
When pressure value reaches load voltage value, the electric energy of energy-storage units 105 is full of, and main control unit 102 will switch K and disconnect, and is stopped as storage
Energy unit 105 charges.
In generating system slump, The faster the better for the response speed of the voltage dip compensation device.And the sound
Speed is answered to depend primarily upon the switching speed of DC/AC converters 104.In order to obtain switching speed quickly, DC/AC converters
104 be the DC/AC converters 104 comprising thyristor, extremely short switch time of such DC/AC converter 104 based on thyristor,
Can be turned in 20 milliseconds namely so that the voltage dip compensation device of the utility model is dropped in system power source voltage
Less than the compensation to system power source voltage in 20 milliseconds after default supply voltage limit value, is realized, load normal work is maintained.
It observes for the convenience of the users, as shown in Figure 1, the voltage dip compensation device of the utility model is also single comprising display
Member 106, display unit 106 is electrically connected with main control unit 102.102 control display unit of main control unit, 106 display system electricity
The voltage value in source 2.The mode of the voltage value of 106 display system power supply 2 of display unit, comprising digital (numerical value) display mode,
Include the display mode using voltage waveform.Display unit 106 is realized using commercially available display screen.
As shown in Figure 1, energy-storage units 105 include capacitor C, the rated capacitance of capacitor C is 2400 microfarads, specified
Voltage is 800 volts.It will be appreciated by those skilled in the art that according to the difference of application scenarios, the difference of the demand of load voltage, it should
Capacitor can carry out the type selecting of adaptability.
Although the foregoing describe specific embodiment of the present utility model, it will be appreciated by those of skill in the art that
This is merely illustrative of, and the scope of protection of the utility model is defined by the appended claims.Those skilled in the art
On the premise of the principle and essence without departing substantially from the utility model, many changes and modifications may be made,
But these change and modification each fall within the scope of protection of the utility model.
Claims (8)
1. a kind of voltage dip compensation device, which is characterized in that include：Voltage monitoring unit, main control unit, AC/DC turn
Parallel operation, DC/AC converters, energy-storage units；
The input terminal of the AC/DC converters is electrically connected with system power supply, and output terminal is electrically connected with the energy-storage units；
The input terminal of the DC/AC converters is electrically connected with the energy-storage units, and the output terminal of the DC/AC converters passes through coupling
Zygonema circle is connected with the power end loaded；
The voltage monitoring unit is electrically connected with system power supply, for monitoring the voltage value of the system power supply；
The main control unit is electrically connected with the voltage monitoring unit, for obtaining the voltage value of the system power supply；
The main control unit is electrically connected with the control terminal of the DC/AC converters, when the voltage value of the system power supply is less than
During default supply voltage limit value, the control terminal of the main control unit to the DC/AC converters sends control signal, the control
For signal processed for opening the DC/AC converters, the energy-storage units pass sequentially through the DC/AC converters and the coupling line
It encloses and provides electric energy for the load.
2. voltage dip compensation device as described in claim 1, which is characterized in that the input terminal of the AC/DC converters leads to
It crosses a switch to be electrically connected with the system power supply, the main control unit is electrically connected with the switch, for controlling the switch
Be turned on or off.
3. voltage dip compensation device as claimed in claim 2, which is characterized in that the voltage monitoring unit also with the storage
Energy unit electrical connection, for monitoring the voltage value of the energy-storage units；
The main control unit is additionally operable to obtain the voltage value of the energy-storage units；When the voltage value of the energy-storage units is less than pre-
If during tank voltage limit value, the main control unit is by the switch conduction.
4. voltage dip compensation device as claimed in claim 3, which is characterized in that when the voltage value of the energy-storage units reaches
During specified tank voltage value, the main control unit disconnects the switch.
5. voltage dip compensation device as described in claim 1, which is characterized in that the DC/AC converters are to include brilliant lock
The DC/AC converters of pipe.
6. voltage dip compensation device as described in claim 1, which is characterized in that the voltage dip compensation device also includes
Display unit, the display unit are electrically connected with the main control unit, for showing the voltage value of the system power supply.
7. voltage dip compensation device as described in claim 1, which is characterized in that the energy-storage units include capacitor.
8. voltage dip compensation device as claimed in claim 7, which is characterized in that the rated capacitance of the capacitor is
2400 microfarads, rated voltage are 800 volts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721474759.9U CN207381981U (en) | 2017-11-07 | 2017-11-07 | Voltage dip compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721474759.9U CN207381981U (en) | 2017-11-07 | 2017-11-07 | Voltage dip compensation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207381981U true CN207381981U (en) | 2018-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721474759.9U Active CN207381981U (en) | 2017-11-07 | 2017-11-07 | Voltage dip compensation device |
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| CN (1) | CN207381981U (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
- 2017-11-07 CN CN201721474759.9U patent/CN207381981U/en active Active
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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