CN108258672A - A kind of low residual voltage busbar stable-pressure device - Google Patents
A kind of low residual voltage busbar stable-pressure device Download PDFInfo
- Publication number
- CN108258672A CN108258672A CN201810042730.6A CN201810042730A CN108258672A CN 108258672 A CN108258672 A CN 108258672A CN 201810042730 A CN201810042730 A CN 201810042730A CN 108258672 A CN108258672 A CN 108258672A
- Authority
- CN
- China
- Prior art keywords
- high pressure
- busbar
- residual voltage
- low residual
- branch bar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/005—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions
- H02H9/007—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions avoiding or damping oscillations, e.g. fenoresonance or travelling waves
Abstract
The invention discloses a kind of low residual voltage busbar stable-pressure devices, including high pressure through busbar, disconnecting switch, computer control device, high pressure branch bar, high-tension fuse, disconnector, current transformer, transient earthing switch, a resonance eliminator, voltage transformer, low residual voltage peak overvoltage absorption plant, thyristor, energy-storage capacitor, discharge switch, discharge coil, the disconnecting switch upper end is connected with high pressure through busbar, disconnecting switch lower end connection high pressure branch bar.The present invention can eliminate system and shake the influences of the voltage dies failure to equipment running status such as electricity; improve power supply reliability; avoid unnecessary shutdown, power failure phenomenon; the dead zone of overvoltage protection can be eliminated simultaneously; overvoltage residual voltage level is substantially reduced; it protects electrical equipment from accumulating injury caused by low amplitude value overvoltage well, particularly to some weak isolating electrical equipments, the service life of electrical equipment can be greatly improved.
Description
Technical field
The present invention relates to a kind of stable-pressure device, specifically a kind of low residual voltage busbar stable-pressure device.
Background technology
With the expansion and upgrading of power system capacity, many equipment in system, such as power electronic devices and asynchronous electricity
A large amount of uses of machine, it is more demanding to power supply quality.Because these electrical equipments are very sensitive to the drop suddenly of voltage, and it is thin to insulate
It is weak.For example during system generation rolling electrical phenomena, some important electrical equipment outages can be caused, greatly reduce the reliable of power supply
Property.On the other hand the insulation of these electrical equipments is weak, and the overvoltage generated in system can generate the insulation of these electrical equipments
Very big injury.The overvoltage protection product of electric system at present is mainly arrester or combination overvoltage protector, this
Generally higher, relatively low to some amplitudes present in the system overvoltage of a little overvoltage protection product action amplitudes, often rises not
To protective effect.If the overvoltage duration of these low amplitude values is longer, the insulation of some electrical equipments will be caused to accumulate
Property injury in addition cause accident.
Invention content
It is mentioned above in the background art to solve the purpose of the present invention is to provide a kind of low residual voltage busbar stable-pressure device
Problem.
To achieve the above object, the present invention provides following technical solution：
A kind of low residual voltage busbar stable-pressure device, it is female through busbar, disconnecting switch, computer control device, high pressure branch including high pressure
Line, high-tension fuse, disconnector, current transformer, a resonance eliminator, voltage transformer, low residual voltage peak overvoltage absorb dress
It puts, thyristor and energy-storage capacitor, which is characterized in that the disconnecting switch upper end is connected with high pressure through busbar, keeps apart
Lower end connection high pressure branch bar is closed, the high voltage device in low residual voltage busbar stable-pressure device is connected to one by high pressure branch bar
It rises, high-tension fuse, disconnector and current transformer head end are connected in parallel by high pressure branch bar, are then attached to be isolated
Lower end is switched, high-tension fuse lower end connects the upper end of voltage transformer by high pressure branch bar, and one time resonance eliminator head end leads to
The neutral point that high pressure branch bar is connected to voltage transformer is crossed, disconnector lower end and low residual voltage peak overvoltage absorb dress
It puts upper end by high pressure branch bar to be connected, current transformer lower end is connected with thyristor upper end by high pressure branch bar
It connects, thyristor lower end is connected with energy-storage capacitor upper end by high pressure branch bar, and a resonance eliminator, low residual voltage spike are excessively electric
Pressure absorption plant, energy-storage capacitor lower end are grounded respectively, current transformer, voltage transformer low-pressure secondary signal output end and
The signal input part connection of computer control device.
As further scheme of the invention：Discharge switch and discharge coil are further included, described discharge switch one end connects
Connect energy-storage capacitor upper end, other end connection discharge coil, discharge coil other end ground connection.
As further scheme of the invention：It is described to further include transient earthing switch, the transient earthing switch in parallel
At a resonance eliminator both ends.
As further scheme of the invention：The low residual voltage busbar stable-pressure device is by high pressure through busbar and other
Being connected through busbar in high-tension switch cabinet low residual voltage busbar stable-pressure device is made to be connected to electric power system.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention can eliminate system and shake the event of the voltage dies such as electricity
Hinder the influence to equipment running status, improve power supply reliability, avoid unnecessary shutdown, power failure phenomenon, while can eliminate
Overvoltage residual voltage level is substantially reduced, protects electrical equipment excessively electric from low amplitude value well by the dead zone of overvoltage protection
Injury is accumulated caused by pressure, particularly to some weak isolating electrical equipments, the service life of electrical equipment can be greatly improved.
Description of the drawings
Fig. 1 is the structure diagram of low residual voltage busbar stable-pressure device.
In figure：High pressure runs through busbar（10）, disconnecting switch（11）, computer control device（12）, high pressure branch bar（13）、
High-tension fuse（14）, disconnector（15）, current transformer（16）, transient earthing switch（17）, a resonance eliminator（18）, voltage
Mutual inductor（19）, low residual voltage peak overvoltage absorption plant（20）, thyristor（21）, energy-storage capacitor（22）, discharge switch
（23）, discharge coil（24）.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, in the embodiment of the present invention, a kind of low residual voltage busbar stable-pressure device, including high pressure through busbar 10, every
Leave pass 11, computer control device 12, high pressure branch bar 13, high-tension fuse 14, disconnector 15, current transformer 16, wink
When earthing switch 17, resonance eliminators 18, voltage transformer 19, low residual voltage peak overvoltage absorption plant 20, thyristor 21, storage
It can capacitor 22, discharge switch 23, discharge coil 24.
Low residual voltage busbar stable-pressure device runs through busbar 10 and being connected through busbar in other high-tension switch cabinets by high pressure
It connects, low residual voltage busbar stable-pressure device is made to be connected to electric power system.
11 upper end of disconnecting switch is connected with high pressure through busbar 10,11 lower end of disconnecting switch connection high pressure branch bar
13, play the role of being connected and disconnected from high pressure through being connected between busbar 10 and high pressure branch bar 13.
High pressure branch bar 13 connects together the high voltage device in low residual voltage busbar stable-pressure device, makes the height in device
Pressure element can be excellently joined to electric power system.
High-tension fuse 14, disconnector 15,16 head end of current transformer are connected in parallel by high pressure branch bar 13, so
After be connected to 11 lower end of disconnecting switch.14 lower end of high-tension fuse connects the upper of voltage transformer 19 by high pressure branch bar 13
End.Transient earthing switchs 17,18 head ends of resonance eliminator and is connected in parallel, and is then connected to voltage by high pressure branch bar 13
Neutral point of mutual inductor 19.15 lower end of disconnector and low 20 upper end of residual voltage peak overvoltage absorption plant pass through high pressure branch
Busbar 13 is connected.16 lower end of current transformer is connected with 21 upper end of thyristor by high pressure branch bar 13, thyristor 21
Lower end is connected with 22 upper end of energy-storage capacitor by high pressure branch bar 13.Transient earthing switchs 17, resonance eliminators 18, low
Residual voltage peak overvoltage absorption plant 20,22 lower end of energy-storage capacitor are grounded respectively.23 one end of discharge switch connects storage capacitor
22 upper end of device, one end connection discharge coil 24,24 other end of discharge coil ground connection.
The signal of current transformer 16, the low-pressure secondary signal output end of voltage transformer 19 and computer control device 12 is defeated
Enter end connection.
When device works normally, disconnecting switch 11 is in the high pressure member of closed state, high pressure branch bar 13 and its connection
The equal charging operation of part.
High pressure in electric system and high current are transformed into low pressure and low current by current transformer 16, voltage transformer 19
Signal is transferred to computer control device 13.Computer control device 13 acquires current transformer 16, voltage transformer 19 real-time
Output current signal and voltage signal.
After device starts power up, computer control device 13 sends out the angle of flow that control signal opens thyristor 21, makes energy storage
Capacitor 22 is in charged state, and the charging current of 16 output of monitoring current mutual inductor in real time.Computer control device 13 detects
To energy-storage capacitor 22 it is fully charged after, send out control instruction, disconnect thyristor 21, energy-storage capacitor 22 is made to be in power-off energy storage shape
State.It is dropped, and threshold value is more than setting value when computer control device 13 detects that the generation of 19 output voltage signal of voltage transformer is steep, it is micro-
Machine control device 13 sends out control signal in 5ms, quick to open thyristor 21, and thyristor 21 is made to be in inverter mode, will
The electric flux of 22 memory storage of energy-storage capacitor is returned to high pressure through busbar 10, electrical equipment is transported to, thereby using electric equipment
Power failure phenomenon will not occur because of the steep drop of voltage, greatly improve power supply for electrical equipment reliability, increase economic efficiency.If it is
The time threshold that time is more than the setting of computer control device 13 drops in system voltage suddenly, then sends out instruction and disconnect thyristor 21.If system
Voltage is dropped suddenly within the time threshold set in computer control device 13 time, then thyristor 21 is made to continue to be connected, and makes energy storage electric
After computer control device 13 detects that energy-storage capacitor 22 charges, it is disconnected to send out instruction again in charged state for container 22
Open thyristor 21.
Transient earthing switchs 17 normal operations and is in closed state.Computer control device 13 passes through collection voltages mutual inductor 19
Output voltage signal, when resonance occurs for the system that detects or has singlephase earth fault recovery, computer control device 13 sends out control
Instruction is off transient earthing switch 17.The dash current that resonance or single-phase earthing restore to generate in this way will
A resonance eliminator 18 is flowed through, so as to which voltage transformer 19 be protected not to be burned, while resonance Production conditions can be destroyed, quickly disappeared
Except resonance overvoltage.After Failure elimination, computer control device 13 sends out control instruction, makes transient earthing switch 17 in closed form
State makes 19 neutral-point solid ground of voltage transformer, avoids 19 output voltage signal of voltage transformer uneven.
During system normal operation, low residual voltage peak overvoltage absorption plant 20 is in high-impedance state, and Leakage Current is almost
Zero.When system generates overvoltage, overvoltage energy is released to greatly by low 20 transient switching of residual voltage peak overvoltage absorption plant
Ground, so as to eliminate system overvoltage to apparatus insulated injury.The advantageous effect of the low residual voltage peak overvoltage absorption plant 20
It is, than relatively low, low residual voltage peak overvoltage absorption plant 20 can make operation voltage design value because it uses new material
Can be accomplished by making voltage by 3.15 times of phase voltage, and other overvoltage protection devices can only accomplish 4 times of phase voltages.It thus can be very
The relatively low overvoltage protection dead zone between 3.15 to 4 times of system is eliminated well, when there is overvoltage, overall residual voltage on busbar
Level protects electrical equipment from accumulating injury caused by low amplitude value overvoltage well than relatively low, particularly weak to some
Insulate electrical equipment, can greatly improve the service life of electrical equipment.When system voltage restores normal, low residual voltage spike is excessively electric
Absorption plant 20 is pressed to restore high-impedance state again.
Disconnector 15 is normally conducting state, when the leakage current for flowing through low residual voltage peak overvoltage absorption plant 20 is more than
Certain numerical value, it is possible to which when can make the low failure of residual voltage peak overvoltage absorption plant 20, disconnector 15 is detached from, will
Low residual voltage peak overvoltage absorption plant 20 and electric system separate, and avoid low residual voltage peak overvoltage absorption plant 20 that event occurs
Barrier.
High-tension fuse 14 is normally conducting state, when the electric current for flowing through voltage transformer 19 reaches certain numerical value, high pressure
Fuse 14 disconnects, and voltage transformer 19 is protected not burnt out by overcurrent.
Closed state is in during 11 normal operation of disconnecting switch, when low residual voltage busbar stable-pressure device needs interruption maintenance,
Disconnecting switch 11 is disconnected, a larger isolation fracture is generated, to protect the safety of service personnel.
During device normal operation, discharge switch 23 is off, and when needing maintenance, operations staff is closed electric discharge and opens
23 are closed, the charge stored by discharge coil 24 to energy-storage capacitor device 22 discharges.
It is obvious to a person skilled in the art that the present invention is not limited to the details of above-mentioned exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requirement rather than above description limit, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference numeral in claim should not be considered as to the involved claim of limitation.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in each embodiment can also be properly combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (4)
1. a kind of low residual voltage busbar stable-pressure device, including high pressure through busbar, disconnecting switch, computer control device, high pressure branch
Busbar, high-tension fuse, disconnector, current transformer, a resonance eliminator, voltage transformer, low residual voltage peak overvoltage absorb
Device, thyristor and energy-storage capacitor, which is characterized in that the disconnecting switch upper end is connected with high pressure through busbar, isolation
Lower end connection high pressure branch bar is switched, the high voltage device in low residual voltage busbar stable-pressure device is connected to one by high pressure branch bar
It rises, high-tension fuse, disconnector and current transformer head end are connected in parallel by high pressure branch bar, are then attached to be isolated
Lower end is switched, high-tension fuse lower end connects the upper end of voltage transformer by high pressure branch bar, and one time resonance eliminator head end leads to
The neutral point that high pressure branch bar is connected to voltage transformer is crossed, disconnector lower end and low residual voltage peak overvoltage absorb dress
It puts upper end by high pressure branch bar to be connected, current transformer lower end is connected with thyristor upper end by high pressure branch bar
It connects, thyristor lower end is connected with energy-storage capacitor upper end by high pressure branch bar, and a resonance eliminator, low residual voltage spike are excessively electric
Pressure absorption plant, energy-storage capacitor lower end are grounded respectively, current transformer, voltage transformer low-pressure secondary signal output end and
The signal input part connection of computer control device.
2. low residual voltage busbar stable-pressure device according to claim 1, which is characterized in that further include discharge switch and discharge lines
Circle, discharge switch one end connection energy-storage capacitor upper end, other end connection discharge coil, discharge coil other end ground connection.
3. low residual voltage busbar stable-pressure device according to claim 1, which is characterized in that the transient earthing that further includes is opened
It closes, the transient earthing switch in parallel is at a resonance eliminator both ends.
4. low residual voltage busbar stable-pressure device according to claim 1, which is characterized in that the low residual voltage busbar stable-pressure device
By high pressure through busbar and being connected through busbar in other high-tension switch cabinets, it is connected to low residual voltage busbar stable-pressure device
Electric power system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810042730.6A CN108258672A (en) | 2018-01-17 | 2018-01-17 | A kind of low residual voltage busbar stable-pressure device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810042730.6A CN108258672A (en) | 2018-01-17 | 2018-01-17 | A kind of low residual voltage busbar stable-pressure device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108258672A true CN108258672A (en) | 2018-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810042730.6A Pending CN108258672A (en) | 2018-01-17 | 2018-01-17 | A kind of low residual voltage busbar stable-pressure device |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3834514A1 (en) * | 1988-10-11 | 1990-04-12 | Asea Brown Boveri | Circuit arrangement for protecting electrical devices and systems against overvoltages |
| CN201312112Y (en) * | 2008-12-03 | 2009-09-16 | 徐成飞 | Overvoltage monitoring and comprehensive protective device for medium voltage power network |
| CN201444584U (en) * | 2009-05-15 | 2010-04-28 | 泰安市麦克米特电气仪表有限公司 | Double-circuit power supply voltage sag voltage compensating device |
| CN102185329A (en) * | 2011-05-04 | 2011-09-14 | 华北电力大学 | Super-capacitor-based DC voltage sag suppression device and suppression method thereof |
| CN202663287U (en) * | 2012-05-29 | 2013-01-09 | 北京金自天正智能控制股份有限公司 | Fast discharging protective circuit of direct-current capacitor |
| CN204515032U (en) * | 2015-01-30 | 2015-07-29 | 深圳市贝壳电气技术有限公司 | A kind of proving installation of energy feedback unit |
| CN205248805U (en) * | 2015-10-15 | 2016-05-18 | 扬州汇洁能电力电子设备有限公司 | Novel DVR voltage compensation device |
| CN206452110U (en) * | 2017-02-21 | 2017-08-29 | 保定佰泓电气科技有限公司 | A kind of overvoltage inhibiting apparatus |
-
2018
- 2018-01-17 CN CN201810042730.6A patent/CN108258672A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3834514A1 (en) * | 1988-10-11 | 1990-04-12 | Asea Brown Boveri | Circuit arrangement for protecting electrical devices and systems against overvoltages |
| CN201312112Y (en) * | 2008-12-03 | 2009-09-16 | 徐成飞 | Overvoltage monitoring and comprehensive protective device for medium voltage power network |
| CN201444584U (en) * | 2009-05-15 | 2010-04-28 | 泰安市麦克米特电气仪表有限公司 | Double-circuit power supply voltage sag voltage compensating device |
| CN102185329A (en) * | 2011-05-04 | 2011-09-14 | 华北电力大学 | Super-capacitor-based DC voltage sag suppression device and suppression method thereof |
| CN202663287U (en) * | 2012-05-29 | 2013-01-09 | 北京金自天正智能控制股份有限公司 | Fast discharging protective circuit of direct-current capacitor |
| CN204515032U (en) * | 2015-01-30 | 2015-07-29 | 深圳市贝壳电气技术有限公司 | A kind of proving installation of energy feedback unit |
| CN205248805U (en) * | 2015-10-15 | 2016-05-18 | 扬州汇洁能电力电子设备有限公司 | Novel DVR voltage compensation device |
| CN206452110U (en) * | 2017-02-21 | 2017-08-29 | 保定佰泓电气科技有限公司 | A kind of overvoltage inhibiting apparatus |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20180706 |