CN206195354U - Automatic thrown cut device of three -phase unbalanced load - Google Patents
Automatic thrown cut device of three -phase unbalanced load Download PDFInfo
- Publication number
- CN206195354U CN206195354U CN201620857814.1U CN201620857814U CN206195354U CN 206195354 U CN206195354 U CN 206195354U CN 201620857814 U CN201620857814 U CN 201620857814U CN 206195354 U CN206195354 U CN 206195354U
- Authority
- CN
- China
- Prior art keywords
- phase
- controller
- reactive
- switching
- unit
- 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.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
Landscapes
- Control Of Electrical Variables (AREA)
Abstract
The utility model provides a generating line that automatic thrown cut device of three -phase unbalanced load, controller are connected with the sampling circuit unit, and the generating line of three -phase electricity is connected to the sampling end of sampling circuit unit, and the power source of controller passes through the generating line that the three -phase electricity is connected to the power supply line, and the control interface of controller connects controllable silicon unit, and it is electric that each reactive compensation subassembly link back the three -phase. The utility model discloses an automatic thrown cut device of three -phase unbalanced load, developments switching unit adopts the silicon controlled rectifier to be the on -off switch of core, it passes through voltage, current zero -crossing detection control, guarantee to drop into capacitor bank near voltage zero is distinguished, thereby switching in rush current's production has been avoided, and cut off and accomplish when the electric current zero passage, the appearance of transient overvoltage has been avoided, the requirement of crossing zero -crossing of condenser has made it to accord with, in addition because the triggering time of silicon controlled rectifier is unrestricted, can realize accurate dynamic compensation, its is effectual has solved original ac contactor on -off switch and has shoved greatly, the switching has the spark, the vibration is big, technical problem such as noise sound.
Description
Technical field
The utility model is related to low-voltage distribution technical field, more particularly to a kind of three-phase load unbalance automatic switching dress
Put.
Background technology
The switch for being commonly applied to secondary capacitor switching is A.C. contactor, and this is a kind of traditional capacitor switching side
Formula, because the phase of three-phase alternating current is mutually 120 °, controls A.C. contactor switching, there is theoretically no optimum operation phase
Point (i.e. the instantaneous Non-selectivity of switching) so that it puts into or during excision power network, to produce a transient process for transient state, and because
Capacitor is the device that voltage is unable to transition, when shnt capacitor is by A.C. contactor switching power network, due to its phase point be with
Machine, so can produce the surge current that amplitude is very big, frequency is very high (100 times of rated capacitors can be can exceed that during maximum of shoving
Electric current).Shove and can not only produce unfavorable interference to power network, electric arc, easy scaling loss contact, Er Qieyong are also easy to produce to A.C. contactor
The failure of stream, overvoltage meeting speed-up capacitor device, reduces the service life of capacitor, or even blast, so using A.C. contactor
Switching mode harmonic pollution it is big, maintenance cost is high, be unsuitable for frequent operation.In order to improve these defects, so-called throwing is occurred in that
Capacitor contactor is cut, is exactly the auxiliary of first being closed when closing a floodgate at the main contact of contactor and with the auxiliary contact of strip resistance
Contact, then closed main contact again, and surge current is lowered with this；And sequential is just the opposite during separating brake, first divide main contact, then again
Divide auxiliary contact, scaling loss of the electric arc to contact is mitigated with this.But this measure is only a kind of improvement, not fundamentally
Solve problem, shove, overvoltage harmonic pollution be still present, the life-span to capacitor and device still has a great impact.
Utility model content
There is three-phase load unbalance for secondary capacitor switching present in prior art, compensation effect is poor and gushes
Stream, the pollution of overvoltage harmonic are still present, and still have a great impact technical problem, this practicality to life-span of capacitor and device
A kind of a kind of three-phase that the three-phase load unbalance imbalance that secondary capacitor switching occurs can be compensated of new offer
Load unbalanced automatic switching device, can effectively solve original contactor fling-cut switch shove greatly, switching have spark, vibration
Greatly, the technical problem such as noise sound.
Technical solution of the present utility model is, a kind of three-phase load unbalance automatic switching device, including controller,
Multichannel reactive-load compensation component and the controllable silicon unit being connected with each reactive-load compensation component, the controller are connected with sampling electricity
Road unit, the sampling end of the sample circuit unit connects the bus of three-phase electricity, and the power interface of the controller is by power supply
Line connects the bus of three-phase electricity, and the supply lines is provided with breaker, fusible link, and the control interface connection of the controller is controllable
Silicon unit, described each reactive-load compensation component is linked back the bus of three-phase electricity.
Preferably, the reactive-load compensation component includes three inductors and three capacitors, and three inductors pass through
Controllable silicon unit is drawn, and three capacitors are connected with each other, and junction connects an inductor respectively.
Preferably, the supply lines is provided with three arresters, three arresters one end ground connection.
Preferably, described device includes 18 tunnel reactive-load compensation components.
Preferably, the sample circuit unit is current transformer.
Compared with prior art, the utility model has following beneficial effect：
Three-phase load unbalance automatic switching device of the present utility model, it is core that dynamic switching unit uses controllable silicon
Fling-cut switch, it passes through voltage, current over-zero detection control, it is ensured that capacitor bank is put near voltage zero area, so as to avoid
The generation of inrush phenomenon, and cut off the completion in current over-zero, it is to avoid the appearance of transient overvoltage, is allowed to meet electricity
The requirement of the operating passing zero of container, the triggering times additionally, due to controllable silicon are unrestricted, it is possible to achieve Quasi dynamic compensation (response
Time is in Millisecond), therefore suitable for the frequent switching of capacitor, it is adaptable to the load condition for frequently changing, its effective solution
Original A.C. contactor fling-cut switch of having determined shove greatly, switching have the technical problems such as spark, vibration are big, noise rings.
Figure of description
Fig. 1 is the structural representation of the utility model three-phase load unbalance automatic switching device.
In figure：1- controllers；2- reactive-load compensation components；3- controllable silicon units；4- sample circuit units；5- supply lines；6-
Breaker；7- fusible links；8- arresters.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the utility model is clearly and completely described.
As shown in figure 1, a kind of three-phase load unbalance automatic switching device, including controller 1, multichannel reactive-load compensation component
2 and the controllable silicon unit 3 that is connected with each reactive-load compensation component 2, the reactive-load compensation component 2 is constituted with controllable silicon unit 3
Thyristor throw-cut mechanism, the controller 1 is connected with sample circuit unit 4, the sampling end connection three of the sample circuit unit 4
The bus of phase electricity, the sample circuit unit 4 is current transformer, the bus current signal for gathering three-phase electricity, the control
The power interface of device processed 1 connects the bus of three-phase electricity by supply lines 5, and the supply lines 5 is provided with breaker 6, fusible link 7,
The control interface connection controllable silicon unit 3 of the controller 1, described each reactive-load compensation component 2 is linked back the bus of three-phase electricity, uses
In each bus of switching.The reactive-load compensation component 2 includes three inductors and three capacitors, and three inductors pass through
Controllable silicon unit 3 is drawn, and three capacitors are connected with each other, and junction connects an inductor respectively.On the supply lines 5
It is provided with three arresters 8, the one end of three arrester 8 ground connection.Described device includes 18 tunnel reactive-load compensation components 2.The control
Device 1 includes current sample node IC and Ic；Power supply node Ua, Ub, Uc；Control node 1~18；Common port com port.It is described controllable
Silicon cell node C1, C2, C3, L1, L2, L3, L, N, K+, K-, the connection of current transformer one end current sample node IC and Ic, separately
One end connects the bus of three-phase electricity.The one end of supply lines 5 connects power supply node Ua, Ub, Uc, and the other end connects the bus of three-phase electricity,
I.e. controller 1 is powered by three-phase electricity.Controllable silicon cell node C1, C2, C3 are connected respectively three inductors, controllable silicon list
First node L1, L2, L3 connect the bus of three-phase electricity, for the switching of bus, controllable silicon cell node L, N correspondence connection supply lines
5, controllable silicon cell node K+ connect common port com port.
Thyristor throw-cut mechanism, is the capacitor fling-cut switch of a kind of " zero cross fired ", and switching unit major loop is used instead simultaneously
Connection thyristor module, controller is made up of triggering, Phototube Coupling and logic control etc., controller combination radiator, blower fan, temperature
Degree control etc., blower fan, overheat protector function are started with temperature control.Thyristor throw-cut mechanism is thrown using the principle of " zero cross fired "
No-flashy-flow when entering capacitor, dynamic response Shi Jian≤20ms are a kind of electronic switches for capacitor switching.
Knowable to summary structure of the present utility model, three-phase load unbalance automatic switching device of the present utility model,
It is the fling-cut switch of core that dynamic switching unit uses controllable silicon, and it passes through voltage, current over-zero detection control, it is ensured that in voltage
Capacitor bank is put near 0th area, so as to avoid the generation of inrush phenomenon, and is cut off and completed in current over-zero, it is to avoid
The appearance of transient overvoltage, is allowed to meet the requirement of the operating passing zero of capacitor, additionally, due to controllable silicon triggering times not
It is restricted, it is possible to achieve Quasi dynamic compensates (response time is in Millisecond), therefore suitable for the frequent switching of capacitor, it is adaptable to
Frequently change load condition, its effectively solve original A.C. contactor fling-cut switch shove greatly, switching have spark, vibrate
Greatly, the technical problem such as noise sound.
Claims (4)
1. a kind of three-phase load unbalance automatic switching device, it is characterised in that：Including controller, multichannel reactive-load compensation component with
And the controllable silicon unit being connected with each reactive-load compensation component, the controller is connected with sample circuit unit, the sampling electricity
The sampling end of road unit connects the bus of three-phase electricity, and the power interface of the controller connects the mother of three-phase electricity by supply lines
Line, the supply lines is provided with breaker, fusible link, the control interface connection controllable silicon unit of the controller, it is described each
Reactive-load compensation component is linked back the bus of three-phase electricity, and the supply lines is provided with three arresters, three arresters one end ground connection.
2. three-phase load unbalance automatic switching device according to claim 1, it is characterised in that：The reactive-load compensation group
Part includes three inductors and three capacitors, and three inductors are drawn by controllable silicon unit, three capacitors
It is connected with each other, and junction connects an inductor respectively.
3. three-phase load unbalance automatic switching device according to claim 2, it is characterised in that：Described device includes ten
Eight tunnel reactive-load compensation components.
4. the three-phase load unbalance automatic switching device according to claim 1 or 2 or 3, it is characterised in that：The sampling
Circuit unit is current transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620857814.1U CN206195354U (en) | 2016-08-09 | 2016-08-09 | Automatic thrown cut device of three -phase unbalanced load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620857814.1U CN206195354U (en) | 2016-08-09 | 2016-08-09 | Automatic thrown cut device of three -phase unbalanced load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206195354U true CN206195354U (en) | 2017-05-24 |
Family
ID=58736578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620857814.1U Expired - Fee Related CN206195354U (en) | 2016-08-09 | 2016-08-09 | Automatic thrown cut device of three -phase unbalanced load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206195354U (en) |
-
2016
- 2016-08-09 CN CN201620857814.1U patent/CN206195354U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103427681B (en) | High-frequency high-voltage electrostatic dust removal power and control guard method thereof | |
| CN101345419B (en) | Series voltage quality regulator and fast investment and cutting method | |
| CN103647458B (en) | Frequency conversion system and carry out the method and apparatus of precharge to the high voltage converter in it | |
| CN204333938U (en) | A kind of short circuit current restriction and protective device | |
| CN112103925A (en) | Multi-port hybrid direct-current circuit breaker and control method | |
| CN205691654U (en) | A kind of synchronization signal detection circuit | |
| Du et al. | Review of DC circuit breaker technology for HVDC application | |
| CN101572412A (en) | High-capacity packet type switchgear | |
| CN106340854A (en) | Device for inhibiting direct current of AC transformer neutral point | |
| CN206848403U (en) | A kind of four machine Parallel test loops | |
| CN206332444U (en) | A kind of LC series resonances current-limiting apparatus | |
| CN101237147B (en) | Integrated power capacitor | |
| CN201130861Y (en) | Intelligent integration power condenser | |
| CN202949231U (en) | Intelligent zero-crossing switching silicon controlled combination switch | |
| CN206195354U (en) | Automatic thrown cut device of three -phase unbalanced load | |
| CN206195358U (en) | Three -phase unbalanced load automatic regulating apparatus | |
| CN204597457U (en) | Transformer neutral point direct current is every straight device | |
| CN201041942Y (en) | Low-voltage passive intelligent tuning filtering device | |
| CN106058888A (en) | Thyristor soft switch switching circuit of static reactive power compensator and control method | |
| CN206686107U (en) | Startup of high-voltage motor compensates equipment | |
| CN107453349B (en) | A kind of Electrical Railway Harmonic resonance restraining device and suppressing method | |
| CN206517068U (en) | A kind of adjustable serial compensation system | |
| CN102255315A (en) | Three-phase current balance adjustment system of electric energy adjusting and electricity saving device | |
| CN205595772U (en) | Series resonance zero loss current limiting device | |
| CN207200270U (en) | A kind of transformer neutral point DC magnetic biasing earthing or grounding means |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170524 Termination date: 20180809 |