CN208094192U - A kind of power distribution network stable-pressure device - Google Patents
A kind of power distribution network stable-pressure device Download PDFInfo
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- CN208094192U CN208094192U CN201821032372.2U CN201821032372U CN208094192U CN 208094192 U CN208094192 U CN 208094192U CN 201821032372 U CN201821032372 U CN 201821032372U CN 208094192 U CN208094192 U CN 208094192U
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- pressure device
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Abstract
A kind of power distribution network stable-pressure device is arranged between power grid (60) and load (70), including：Conversion module (20), input terminal are connect with energy-storage module (10), and output end is electrically connected with load (70)；Thyristor switch (30), setting control the power grid (60) and load the connection or disconnection between (70) between power grid (60) and load (70)；Other open circuit (40), setting are connected in parallel on the thyristor switch (30) both ends between power grid (60) and load (70)；Control module (50) is electrically connected with power grid (60), other open circuit (40) and conversion module (20) respectively, voltage value for obtaining the power grid (60), and according to the voltage value match control strategy so that the stabilized input voltage of load (70).Detection by control module to circuit voltage, and the control to conversion module, three-phase bidirectional thyristor circuit and other open circuit, to realize monitoring and improvement to network voltage.
Description
Technical field
The utility model is related to supply voltage compensation technique field, more particularly to a kind of power distribution network stable-pressure device.
Background technology
With the extensive rapid development of factory automation, precision equipment is more and more extensive using using in the factory, to supplying
Electric power quality requires also higher and higher.Especially some important equipment require voltage stability higher and higher, and wherein
Most common problem is exactly voltage dip or temporarily rises in voltage stability, and voltage dip or temporary rise will cause production line to stop
Machine or production Product Precision variation are scrapped, and irremediable loss is directly contributed.Therefore to the temporary drop of these load supply voltages
Or temporarily rise power quality problem and carry out rebuilding and improving, so that its load supply voltage is reached stabilization and is of great significance to.
It is to increase UPS in load side to voltage dip or temporarily to rise power quality problem to carry out rebuilding and improving most straightforward approach
Device, but the cost of this method is very high, and cause power supply efficiency low, use cost is also higher.Therefore a kind of structure is needed
Simply, modification scheme easy to use, reliability is high.
Utility model content
The purpose of this utility model is to provide a kind of power distribution network stable-pressure device, is supervised to power quality by parallel way
Control, when system voltage falls, which can rapid offset voltage.
To solve the above problems, the utility model provides a kind of power distribution network stable-pressure device, it is arranged in power grid and load
Between, which is characterized in that including：Conversion module, input terminal are connect with energy-storage module, and output end is electrically connected with load；Brilliant lock
Pipe switchs, and is arranged between power grid and load, controls the connection or disconnection between the power grid and load；Other open circuit, setting
Between power grid and load, and it is connected in parallel on thyristor switch both ends；Control module respectively with power grid, other open circuit and conversion
Module is electrically connected, the voltage value for obtaining the power grid, and according to the voltage value match control strategy so that is loaded is defeated
Enter voltage stabilization.
Further, conversion module includes three single-phase inverters.
Further, single-phase inverter includes filter and H-bridge circuit.
Further, the input terminal of each H bridge inverters is electrically connected with energy-storage module respectively；Each H bridge inverters is defeated
Outlet is connected with load.
Further, it is electrically connected with energy-storage module after the input terminal parallel connection of each H bridge inverters；Each H bridge inverters
Output end is connected with the load respectively.
Further, conversion module is according to 120 degree of output three-phase voltages of difference between phase.
Further, its amplitude of output three-phase voltage is the rated value of the amplitude or setting in network voltage normal range (NR).
Further, control module is also electrically connected with energy-storage module, and the electricity for obtaining energy-storage module is remaining.
Further, thyristor circuit contains three-phase bidirectional conduction unit and shutdown separate unit.
Further, shutdown unit is that SCR is switched or IGBT is switched.
The above-mentioned technical proposal of the utility model has following beneficial technique effect：
The power distribution network stable-pressure device can monitor network voltage in real time, can be with when network voltage fluctuates
Power grid connection is disconnected in 1-2 milliseconds, is generated inverter voltage in load end, is avoided since the fluctuation of network voltage leads to precision
The damage of instrument, and the installation cost is relatively low, and simple in structure, easy to use, reliability is high.
Description of the drawings
Fig. 1 is the schematic diagram according to the utility model first embodiment；
Fig. 2 is the schematic diagram according to another embodiment of the utility model；
Fig. 3 is the schematic diagram according to the another embodiment of the utility model.
Reference numeral：
10：Energy-storage module；20：Conversion module；30：Three-phase bidirectional thyristor circuit；40：Other open circuit；50：Control mould
Block；60：Power grid；70：Load；A：Power grid end；B：Load end C：Energy-storage module；DBU1、DBU2、DBU3：DC power supply；PK：It opens on side
Contactor；GK：Power bi-directional switchs；HA、HB、HC：H bridge inverters.
Specific implementation mode
To make the objectives, technical solutions and advantages of the present invention clearer, With reference to embodiment
And with reference to attached drawing, the utility model is further described.It should be understood that these descriptions are merely illustrative, and do not really want
Limit the scope of the utility model.In addition, in the following description, descriptions of well-known structures and technologies are omitted, to avoid not
Necessarily obscure the concept of the utility model.
In addition, as long as technical characteristic involved in the utility model different embodiments disclosed below is each other
Not constituting conflict can be combined with each other.
Fig. 1 is the schematic diagram according to the utility model first embodiment.
As shown in Figure 1, power distribution network stable-pressure device, including：Energy-storage module 10, conversion module 20, three-phase bidirectional thyristor electricity
Road 30, other open circuit 40, control module 50；The input terminal of conversion module 20 is electrically connected with energy-storage module 10, output end and load
70 electrical connections；Three-phase bidirectional thyristor circuit 30 is electrically connected with power grid 60 and 70 ends of load respectively；Other open circuit 40 is double with three-phase
It is in parallel to thyristor circuit 30；Control module 50 is electrically connected with power grid 60, other open circuit 40 and conversion module 20, for examining
Slowdown monitoring circuit acquires signal and control exports.
Optionally, energy-storage module is lithium battery, lead accumulator or super capacitor.
Preferably, energy-storage module is super capacitor, and the capacitance of farad grade, Wu Xute are reached under the volume of realization very little
Other charging circuit and control discharge circuit are compared with battery to be overcharged, crosses and put not to the composition negative effect of its service life, from environmental protection
From the point of view of, it is a kind of green energy resource, and ultracapacitor is solderable, because may be not present as battery contacts insecure etc. ask
Topic.
Preferably, conversion module 20 is three single-phase inverters, it is preferred that single-phase inverter includes that filter and H bridges are inverse
Become device structure, can be alternating current by direct current stable conversion.
Other open circuit is connected when power grid breaks down, just with maintenance.
Detection of the utility model embodiment by control module 50 to circuit voltage, and to conversion module 20, three-phase
The control of bidirectional thyristor circuit 30 and other open circuit 40, to realize monitoring and improvement to network voltage, which can be with
The problems such as safe and effective improvement voltage dip, short interruptions and voltage swell, protection load 70, and the equipment cost
Relatively low, simple in structure, easy to use, reliability is high.
Preferably, it is electrically connected with the energy-storage module 10 after the input terminal parallel connection of H bridge inverters structure, H bridge inverter structures
It is electrically connected with 70 ends of load after output end parallel connection.
According to the utility model reality second embodiment, H bridge inverter structure input terminals are electrically connected with energy-storage module 10, H bridges
It is electrically connected with 70 ends of load after inverter structure output end parallel connection.
Preferably, conversion module 20 is according to 120 degree of output three-phase voltages of difference between phase.
Preferably, its amplitude of output three-phase voltage is the rated value of the amplitude or setting in network voltage normal range (NR).
Preferably, control module 50 is also electrically connected with energy-storage module 10, for detecting 10 electricity of energy-storage module and voltage.?
When not enough power supply, 10 charged state of energy-storage module is switched to until to floating charge state is maintained by controlling conversion module 20.
Preferably, three-phase bidirectional thyristor circuit 30 contains three-phase bidirectional conduction and shutdown separate unit.Power grid can be achieved
Voltage failure contacting between 1ms internal cutting ofves power grid and load.
Specifically, another embodiment of the utility model is power grid controlling device working condition, when control module 50 detects electricity
When net voltage is normal, it is in the conduction state to control the three-phase bidirectional thyristor circuit 30, and controls at the conversion module 20
In carrying out charged state for the energy-storage module 10, until to floating charge state is maintained；
When the control module 50 detects that network voltage is temporarily dropped or temporarily risen, the three-phase bidirectional thyristor circuit is controlled
30 rapid shutdowns, while it is electricity to control the conversion module 20 according to 120 degree of output three-phase voltages, amplitude is differed between phase
The rated value of amplitude or setting in net voltage normal range (NR)；
When the control module 50, which detects network voltage, restores normal, 20 output AC voltage of the conversion module is controlled
Phase and amplitude it is identical as network voltage, control the three-phase thyristor circuit and be connected rapidly, and control conversion module 20 and cut
It is changed to 10 charged state of energy-storage module；
When the control module 50 detects the three-phase thyristor circuit normal work, controls the other open circuit 40 and protect
Hold disconnection；
When the control module 50, which detects the three-phase thyristor circuit, is in malfunction, the other open circuit is controlled
40 keep "on" position.
Fig. 2 is the schematic diagram according to another embodiment of the utility model.
As shown in Fig. 2, load-side is a common DBU, it is located at three independent H bridge inverters unit DC sides simultaneously
Shared C-terminal mouth after connection.
Fig. 3 is the schematic diagram according to the another embodiment of the utility model.
As shown in figure 3, the direct current backup battery cells D BU of load-side is three independent DBU1, DBU2, DBU3, they
It is respectively provided at the independent port CA, CB, CC of corresponding H bridge inverters unit outlet side.
The utility model is intended to protect a kind of power distribution network stable-pressure device, including：Energy-storage module 10, conversion module 20, three-phase
Bidirectional thyristor circuit 30, other open circuit 40, control module 50；The input terminal of conversion module 20 is electrically connected with energy-storage module 10,
Output end is electrically connected with 70 ends of load；Three-phase bidirectional thyristor circuit 30 is connected to power grid 60 and load 70；Other open circuit 40 with it is double
To thyristor circuit parallel connection；Control module 50 is electrically connected with power grid 60, other open circuit 40 and conversion module 20, for detecting
The conducting and shutdown of circuit voltage and control circuit.Detection by control module 50 to circuit voltage, and to conversion module
20, the control of three-phase bidirectional thyristor circuit 30 and other open circuit 40, to realize monitoring and improvement to network voltage.
It should be understood that the above-mentioned specific implementation mode of the utility model is used only for exemplary illustration or explains this reality
With novel principle, without constituting limitations of the present invention.Therefore, in the spirit and scope without departing from the utility model
In the case of any modification, equivalent substitution, improvement and etc. done, should be included within the scope of protection of this utility model.In addition,
The appended claims for the utility model are intended to cover to fall into attached claim scope and boundary or this range and boundary
Whole change and modification examples in equivalent form.
Although the embodiment of the utility model is described in detail, it should be understood that, without departing from this reality
In the case of with novel spirit and scope, various changes, replacement and change can be made to the embodiment of the utility model.
Claims (10)
1. a kind of power distribution network stable-pressure device, setting is between power grid (60) and load (70), which is characterized in that including：
Conversion module (20), input terminal are connect with energy-storage module (10), and output end is electrically connected with load (70)；
Thyristor circuit (30), setting power grid (60) and load (70) between, control the power grid (60) and load (70) it
Between connection or disconnection；
Other open circuit (40), setting are connected in parallel on the thyristor circuit (30) both ends between power grid (60) and load (70)；
Control module (50) is electrically connected with power grid (60), other open circuit (40) and conversion module (20) respectively, described for obtaining
The voltage value of power grid (60), and according to the voltage value match control strategy so that the stabilized input voltage of load (70).
2. power distribution network stable-pressure device according to claim 1, which is characterized in that the conversion module (20) includes three lists
Phase inverter.
3. power distribution network stable-pressure device according to claim 2, which is characterized in that the single-phase inverter include filter and
H-bridge circuit.
4. power distribution network stable-pressure device according to claim 3, which is characterized in that the input terminal point of each H-bridge circuit
It is not electrically connected with the energy-storage module (10)；
The output end of each H-bridge circuit is connected with the load.
5. power distribution network stable-pressure device according to claim 2, which is characterized in that the input terminal of each single-phase inverter
It is electrically connected with the energy-storage module (10) after parallel connection；
The output end of each single-phase inverter is connected with the load respectively.
6. power distribution network stable-pressure device according to claim 1 or 2, which is characterized in that the conversion module (20) is according to phase
120 degree of output three-phase voltages of difference between position.
7. power distribution network stable-pressure device according to claim 6, which is characterized in that its amplitude of the output three-phase voltage is electricity
The rated value of amplitude or setting in net voltage normal range (NR).
8. power distribution network stable-pressure device according to claim 1, which is characterized in that the control module (50) also with energy storage mould
Block (10) is electrically connected, and the electricity for obtaining the energy-storage module is remaining.
9. power distribution network stable-pressure device according to claim 1, which is characterized in that the thyristor circuit (30) contains three-phase
Bidirectional conduction unit and shutdown separate unit.
10. power distribution network stable-pressure device according to claim 9, which is characterized in that the shutdown separate unit switchs for SCR
Or IGBT switches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821032372.2U CN208094192U (en) | 2018-07-02 | 2018-07-02 | A kind of power distribution network stable-pressure device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821032372.2U CN208094192U (en) | 2018-07-02 | 2018-07-02 | A kind of power distribution network stable-pressure device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208094192U true CN208094192U (en) | 2018-11-13 |
Family
ID=64052369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821032372.2U Active CN208094192U (en) | 2018-07-02 | 2018-07-02 | A kind of power distribution network stable-pressure device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208094192U (en) |
-
2018
- 2018-07-02 CN CN201821032372.2U patent/CN208094192U/en active Active
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