CN106451489A - Intelligent low-voltage power capacitor - Google Patents
Intelligent low-voltage power capacitor Download PDFInfo
- Publication number
- CN106451489A CN106451489A CN201610993112.0A CN201610993112A CN106451489A CN 106451489 A CN106451489 A CN 106451489A CN 201610993112 A CN201610993112 A CN 201610993112A CN 106451489 A CN106451489 A CN 106451489A
- Authority
- CN
- China
- Prior art keywords
- signal
- capacitor
- voltage
- circuit
- zero
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/16—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for capacitors
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The invention relates to an intelligent low-voltage power capacitor comprising a capacitor body with a capacitor core and a control unit. The control unit consists of a circuit breaker, a voltage and current signal acquisition circuit, a switching mechanism and a single-chip microcomputer. A signal filtering and shaping circuit, an A/D conversion unit, a logic protection calculation unit, a zero-crossing capturing circuit and a zero-crossing switching control unit are arranged inside the single-chip microcomputer in an integrated mode. The logic protection calculation unit including a logic operation module, a storage module and a comparison module is used for calculation to obtain a voltage, a current, an active power, a reactive power, a power factor, and a harmonic quantity and controlling the zero-crossing switching control unit to execute capacitor core cutting for the switching mechanism when the voltage, current and harmonic quantity exceeds standards, thereby realizing over-voltage, under-voltage, and harmonic protection. Therefore, on the basis of reactive compensation logic, the switching mechanism is controlled to execute zero-crossing switching based on zero-crossing determination, thereby realizing reactive compensation. According to the intelligent low-voltage power capacitor provided by the invention, harmonic, voltage and current protection is realized based on the logic operation of the single-chip microcomputer; and the intelligent low-voltage power capacitor has advantages of complete protection functions and compact structure.
Description
Technical field
The present invention relates to electrical equipment technical field, specifically power capacitor.
Background technology
Intelligent capacitor is a kind of integrated modern test and control, power electronics, network communication, Automated condtrol, power capacitor
The intelligent powerless compensation device being integrated etc. advanced technology, has compensation effect more preferably, volume is less, and power consumption is lower, and price is more
Honest and clean use is more flexible, safeguards convenient, service life is longer, the higher feature of reliability.Change traditional reactive-load compensation
Device fall behind controller technology and fall behind mechanical type switching or electromechanical integral switch as switched capacitor switching skill
Art.
On market, the intelligent capacitor of existing each producer technically more or less all also has incomplete place：As protection
Function imperfection：There is no temperature protection；Each monolithic capacitor does not have the harmonic protection of oneself；There is no current protection；The above
Defect can cause capacitor to burn damage.Communication is using traditional 485 bus communications are slow, efficiency is low.
Content of the invention
Objects of the present invention：For overcoming the defect of prior art presence, the present invention provides one kind to possess itself harmonic wave, electricity
Pressure, current protection, the perfect Intelligent low-voltage power capacitor of defencive function, there is compact conformation.
For achieving the above object, the invention provides following technical scheme：
A kind of Intelligent low-voltage power capacitor, including in set the capacitor body of capacitor core and located at capacitor body top
Control device, control device includes chopper, for gathering the voltage and current signal collection of the voltage in phase line, current signal
Circuit, for cutting off or connecting the switching mechanism of chopper and capacitor body, and single-chip microcomputer；
Described single-chip microcomputer includes the signal filtering shaping circuit being connected with voltage and current signal Acquisition Circuit,
The A/D converting unit being connected with signal filtering shaping circuit, for the signal of input is converted to digital signal,
The control of reactive power compensating unit being connected with A/D converting unit, the control of reactive power compensating unit inputs according to A/D converting unit
Signal carries out idle analysis to send reactive compensation switching order,
The zero passage being connected with signal filtering shaping circuit catches circuit, for the sine wave signal of input is converted to square-wave signal
And catch zero crossing output zero cross signal,
And operating passing zero control unit, based on the reactive compensation switching order of the control of reactive power compensating unit, and obtaining detection
Zero passage exports corresponding operating passing zero drive signal when catching the zero cross signal of circuit；
Described switching mechanism according to the corresponding cut-out of switching drive signal or connect chopper and capacitor body it is characterised in that：
Described the control of reactive power compensating unit is virtual protection computing unit,
Virtual protection computing unit includes logical operation module, for calculating voltage, electric current, active power, reactive power, power
Factor and harmonic content；
Memory module, the maximum voltage threshold values that is stored with, critical voltage threshold values, current threshold, power factor upper limit threshold values, power because
Number lower limit threshold values harmonic amount threshold values；
And comparison module, CL Compare Logic computing module calculates the magnitude of voltage obtaining and reaches critical voltage threshold values or exceed maximum electricity
During pressure valve value, excise control signal to operating passing zero control unit output capacitance fuse；CL Compare Logic computing module calculates and obtains
Current value exceed current threshold when, to operating passing zero control unit output capacitance fuse excise control signal；CL Compare Logic is transported
The harmonic content calculating module calculating acquisition exceedes during harmonic content threshold values to the excision control of operating passing zero control unit output capacitance fuse
Signal；Operating passing zero control unit is based on capacitor core excision control signal and drives letter to the excision of switching mechanism output capacitance fuse
Number thus excise capacitor body realize the overvoltage of capacitor core, excessively stream harmonic protection；
The power factor that described reactive compensation switching order includes described comparison module CL Compare Logic computing module calculating acquisition is big
In the power factor upper limit threshold values prestoring, then send the idle excision of excision capacitor body to operating passing zero control unit
Order, and when the power factor calculating is less than the power factor lower limit threshold values prestoring, then to operating passing zero control unit
Send the idle input order putting into capacitor body；
Described operating passing zero control unit based on reactive compensation switching order and detects the zero passage obtaining detection zero passage seizure circuit
Corresponding operating passing zero drive signal is exported, the operating passing zero reaching capacitor realizes reactive-load compensation during signal.
It is further arranged to：Described operating passing zero control unit also has for time delay output operating passing zero drive signal
Delay circuit, the operating passing zero drive signal output time T3=zero cross signal that delay circuit determines obtains moment T0+ zero cross signal
Switching T2 movement time of cycle T 1- switching mechanism.
It is further arranged to：Described single-chip microcomputer also includes temperature measuring circuit, is provided with temperature and passes in capacitor body
Sensor, temperature sensor is connected with temperature measuring circuit realizes temperature monitoring in capacitor body, and temperature measuring circuit is turned with A/D
Change unit and connect and realize processes temperature signal and be converted to digital signal, be also stored with the memory module of described single-chip microcomputer temperature valve
Value, the comparison module of virtual protection computing unit is also had the temperature value measuring temperature measuring circuit and is compared with threshold temperature,
To operating passing zero control unit output capacitor fuse when the temperature value measuring gained in temperature measuring circuit reaches threshold temperature
Excision control signal, operating passing zero control unit excises control signal to switching mechanism output capacitance fuse according to capacitor body
Excision drive signal, thus realize the temperature protection of capacitor core.
It is further arranged to：Described switching mechanism includes magnetic latching relay and the throwing for controlling magnetic latching relay
Cut drive circuit, switching drive circuit is full bridge driving circuit.
It is further arranged to：Described virtual protection computing unit is the Fourier algorithm unit using Fourier algorithm.
It is further arranged to：CAN communication interface for communicating networking is additionally provided with described single-chip microcomputer.
It is further arranged to：Described chopper is set up in capacitor body top, chopper installing space formed below, collection
One-tenth has the signals collecting surface-mounted integrated circuit of voltage and current signal Acquisition Circuit in the installing space below chopper, described electricity
Vessel top has also set up signal converting circuit board, and signal converting circuit board is long along capacitor body top with chopper
The arrangement of degree direction, described switching mechanism is magnetic latching relay and the switching drive circuit being used for controlling magnetic latching relay is integrated
The operating passing zero module of shape, operating passing zero module and single-chip microcomputer are welded on signal converting circuit board, described signal converting circuit
Plate is independently arranged with signals collecting surface-mounted integrated circuit and is connected through holding wire, and described single-chip microcomputer, operating passing zero module and signal are adopted
Collection surface-mounted integrated circuit communicates through signal converting circuit board and connects.
It is further arranged to：The top of described capacitor body is provided with the first mounting post and the confession that supply chopper is installed
The second mounting post that signals collecting surface-mounted integrated circuit is installed, the second mounting post is less than the first mounting post, and chopper is set up in first
In mounting post, and in chopper described installing space formed below, described signals collecting surface-mounted integrated circuit is in installing space
And be fixedly mounted on the second mounting column.
It is further arranged to：Described capacitor body top is provided with the 3rd mounting post installed for signal converting circuit board,
Signal converting circuit board rack is in the 3rd mounting post, and in signal converting circuit board assembly space formed below, capacitor is originally
Binding post on body top is in described assembly space.
The present invention has the advantages that：Operating passing zero control is realized using zero passage detection, will not produce and shove, zero passage
Switching adopts delays time to control, reaches and more accurately controls；Real using virtual protection computing unit and operating passing zero control unit
Capacitor switching when existing excessively stream, overvoltage, under-voltage and harmonic protection and electric network reactive compensation controls, and has compact conformation,
The advantage of reliable operation, is monitored to the temperature in capacitor body simultaneously, reaches temperature protection function so that electric capacitor
Utensil has perfect defencive function it is ensured that power capacitor reliable operation；Power capacitor Jian Zu Netcom is realized using CAN
News, have communication speed height, strong antijamming capability；In addition, the reasonable in design of the control device of power capacitor, layout is whole
Clean compact, it is easy to dismounting and safeguards, reduce to a certain extent and disturb it is ensured that control device is stable and reliable in work between internal signal.
The invention will be further described below in conjunction with the accompanying drawings.
Brief description
Fig. 1 is specific embodiment of the invention Intelligent low-voltage power capacitor schematic diagram；
Fig. 2 is specific embodiment of the invention virtual protection computing unit theory diagram；
Fig. 3 is specific embodiment of the invention operating passing zero control unit operating passing zero theory diagram；
Fig. 4 is specific embodiment of the invention Intelligent low-voltage power capacitor structural representation.
Specific embodiment
Referring to accompanying drawing 1 to accompanying drawing 3, a kind of Intelligent low-voltage power capacitor disclosed by the invention, including in set capacitor core
11 capacitor body 1 and the control device located at capacitor body 1 top, capacitor body 1 includes housing 12, located at shell
Capacitor core 11 in body 12 and the top cover 13 being placed on housing 12 top oral area, top cover 13 is provided with binding post（In figure quilt
Insulating boot covers, and does not show）, described control device includes chopper 2, for gathering the electricity of the voltage in phase line, current signal
Current voltage signal acquisition circuit, for cutting off or connecting the switching mechanism of chopper 2 and capacitor body 11, and single-chip microcomputer 4；
Voltage and current signal Acquisition Circuit includes current transformer 31, voltage transformer and signals collecting surface-mounted integrated circuit 32, and signal is adopted
Collection surface-mounted integrated circuit 32 is connected with current transformer 31, voltage transformer, and the electric current of electrical network, voltage signal are converted to low by realization
Pressure signal（Within being usually 5V）Output；In this specific embodiment, switching mechanism includes magnetic latching relay and is used for controlling magnetic
The switching drive circuit of guard relay, switching drive circuit is preferably full bridge driving circuit, such as using the driving of DMOS structure
Realizing, in 8V ~ 36V, driving current is up to 2800mA to its output voltage range to chip DRV8800, and one single chip can achieve
Drive, simpler reliability, applied widely；
Described single-chip microcomputer includes the signal filtering shaping circuit being connected with voltage and current signal Acquisition Circuit, realizes to voltage x current
The analogue signal of signal acquisition circuit output such as filters, amplifies at the anti-interference process,
The zero passage being connected with signal filtering shaping circuit catches circuit, and zero passage catches circuit and obtains the output of signal filtering shaping circuit
Voltage signal, for by the sine wave signal of input be converted to square-wave signal and catch zero crossing output zero cross signal,
The A/D converting unit being connected with signal filtering shaping circuit, the electric current of signal filtering shaping circuit, voltage signal warp simultaneously
A/D converting unit is converted to digital signal,
The control of reactive power compensating unit being connected with A/D converting unit, the control of reactive power compensating unit inputs according to A/D converting unit
Signal carries out idle analysis to send reactive compensation switching order,
And operating passing zero control unit, based on the reactive compensation switching order of the control of reactive power compensating unit, and obtaining detection
Zero passage exports corresponding operating passing zero drive signal when catching the zero cross signal of circuit；
Described switching mechanism according to the cut-out of switching drive signal or connects chopper 2 and capacitor body 11, thus reaching zero passage
Switching realizes reactive-load compensation；
Wherein, the control of reactive power compensating unit adopts virtual protection computing unit；
Virtual protection computing unit includes logical operation module, memory module and comparison module,
Described logical operation module is used for calculating voltage, electric current, active power, reactive power, power factor (PF) and harmonic content；
Described memory module, for store maximum voltage threshold values, critical voltage threshold values, current threshold, power factor upper limit threshold values,
Power factor lower limit threshold values harmonic amount threshold values, for ease of using, is additionally provided with key operation module and liquid on power capacitor
Brilliant display module, can set the corresponding preset value in memory module by key operation module（Maximum voltage threshold values, critical voltage
Threshold values, current threshold, power factor upper limit threshold values, power factor lower limit threshold values harmonic amount threshold values）；
Described comparison module, for the preset value in the value of calculation and memory module that test and analyze acquisition by logical operation module
It is compared；CL Compare Logic computing module calculates the magnitude of voltage obtaining and reaches critical voltage threshold values or exceed maximum voltage threshold values
When, excise control signal to operating passing zero control unit output capacitance fuse；CL Compare Logic computing module calculates the electric current obtaining
When value is beyond current threshold, excise control signal to operating passing zero control unit output capacitance fuse；CL Compare Logic computing module
Calculate the harmonic content obtaining to exceed during harmonic content threshold values to operating passing zero control unit output capacitance fuse excision control signal；Cross
Zero switching control unit be based on capacitor core excision control signal to switching mechanism output capacitance fuse excise drive signal thus
Excision capacitor body realizes the overvoltage of capacitor core, the protection of excessively stream harmonic；
In addition, CL Compare Logic computing module calculates the power factor obtaining is more than the power factor upper limit threshold values prestoring, then
Send the idle excision order of excision capacitor body to operating passing zero control unit, and when the power factor calculating is less than in advance
The power factor lower limit threshold values first storing, then send the idle input life putting into capacitor body to operating passing zero control unit
Order, thus constitute reactive compensation switching order to carry out corresponding reactive compensation switching control；Described operating passing zero control unit base
Export corresponding operating passing zero in reactive compensation switching order and when detecting the zero cross signal obtaining detection zero passage seizure circuit to drive
Dynamic signal, the operating passing zero reaching capacitor realizes reactive-load compensation（Obtain idle input in operating passing zero control unit to order
When based on zero cross signal to switching mechanism output zero passage put into drive signal, operating passing zero control unit obtain idle excision life
It is based on zero cross signal when making to switching mechanism output zero passage excision drive signal, reach the cut-out of capacitor body and connect control
System）, wherein, virtual protection computing unit is the Fourier algorithm unit using Fourier algorithm, the harmonic content that analysis is 1 ~ 20 time.
In addition, described single-chip microcomputer also includes temperature measuring circuit, it is provided with temperature sensor 5 in capacitor body 1, temperature
Degree sensor 5 can adopt NTC device, and temperature sensor is connected with temperature measuring circuit realizes temperature monitoring in capacitor body,
The temperature information of collection is changed into small voltage signal by temperature measuring circuit（Within being usually 5V）And export, temperature measuring circuit
It is connected with A/D converting unit and realizes processes temperature signal and be converted to digital signal, also store in the memory module of described single-chip microcomputer
There is a threshold temperature, the comparison module of virtual protection computing unit also has the temperature value measuring temperature measuring circuit and temperature valve
Value compares, to operating passing zero control unit output capacitance when the temperature value measuring gained in temperature measuring circuit reaches threshold temperature
Device fuse excises control signal, and operating passing zero control unit is excised control signal according to capacitor body and exported electricity to switching mechanism
Hold fuse excision drive signal, thus realizing the temperature protection of capacitor core.
Control for reaching more accurate operating passing zero, described operating passing zero control unit also has and exported for time delay
The delay circuit of zero switching drive signal, the operating passing zero drive signal output time T3=zero cross signal that delay circuit determines obtains
Obtain switching T2 movement time of moment T0+ zero cross signal cycle T 1- switching mechanism.Operating passing zero has more accurately and reliable.
In this specific embodiment, described single-chip microcomputer is additionally provided with the CAN communication interface for communicating networking.It is not only convenient for many
Individual intelligent capacitor networking is to form reactive compensation system, and improves the work efficiency of reactive compensation system.
In addition, the power capacitor of the invention can achieve that to the compensation of electrical network independent point is mended, individually mends altogether and divide
Mend and mend altogether the mixed compensation of combination.
For make control device in hardware arrangement structure more preferably, adopt in this specific embodiment, such as accompanying drawing 2（For more preferable
The improvement indicating in the invention structure, wherein wiring and each circuit board components and parts formed functional circuit according to upper
Give an account of and continue, this technology personnel are capable of the invention, therefore components and parts on each circuit board and connecting line are omitted）Shown：
Described chopper 2 is set up in capacitor body 1 top, chopper 2 installing space formed below, is integrated with voltage and current signal and adopts
, in the installing space of chopper 2 lower section, described capacitor body 1 top is also for the signals collecting surface-mounted integrated circuit 32 of collector
Erection has signal converting circuit board 6, and signal converting circuit board 6 is arranged along capacitor body 1 top length direction with chopper 2
Cloth, described switching mechanism is magnetic latching relay and the zero passage for controlling the switching drive circuit collection of magnetic latching relay to shape
Switching module 7, operating passing zero module 7 and single-chip microcomputer 4 are welded on signal converting circuit board 6, described signal converting circuit board 6 with
Signals collecting surface-mounted integrated circuit 32 is independently arranged and through holding wire（In figure holding wire omits）Connect, described single-chip microcomputer 4, zero passage are thrown
Cut module 7 and signals collecting surface-mounted integrated circuit 32 and communicate through signal converting circuit board 6 and connect.
By control device, on hardware, each several part integrates setting, using chopper 2 and signals collecting surface-mounted integrated circuit 32 is in
Longitudinally arrangement setting, signal converting circuit board 6 is arranged along capacitor body 1 top length direction with chopper 2, signal converting electricity
Road plate 6 and signals collecting surface-mounted integrated circuit 32 are that independent two boards design carries out communication connection, setting signal by holding wire
Switching circuit board 6, facilitates operating passing zero module 7 and single-chip microcomputer 4 to fixedly mount, and signal converting circuit board 6 completes accordingly each portion
The communication dividing connects, and realizes the signaling transfer point of signal；So that intelligent power capacitor integral arrangement is neatly compact, just
In assembling；And the high-voltage signal of input is converted into low-voltage signal through holding wire, signal converting circuit board by signal acquisition circuit
It is given to single-chip microcomputer, single-chip microcomputer exports corresponding control signal through signal converting circuit board to operating passing zero module, realize high-low pressure letter
Being provided separately so that intelligent power capacitor is stable and reliable in work number to a certain extent.Signal converting circuit on-board circuitry is
The general circuit of supply signal communication, its role is signal conduction.
In this specific embodiment, the top of described capacitor body 1 is provided with the first mounting post 81 that supply chopper 2 is installed
And the second mounting post 82 for signals collecting surface-mounted integrated circuit 32 installation, the second mounting post 82 is less than the first mounting post 81, disconnected
Road device 2 is set up in the first mounting post 81, and in chopper 2 described installing space formed below, the integrated electricity of described signals collecting
Road plate 32 and is fixedly mounted on the second mounting column 82 in installing space.Installed using pillar, chopper and signal are adopted
The installation fixed structure of collection surface-mounted integrated circuit is simple.Second mounting post is provided with the screw hole axially extending, signals collecting collection
Become circuit board rack to be located in the second mounting post and screw is locked screw in the hole and reached and the locking of signals collecting surface-mounted integrated circuit exists
In second mounting post.
Described capacitor body 1 top is provided with the 3rd mounting post 83 installed for signal converting circuit board 6, in capacitor originally
The top cover of body 1 is provided with two and ranked third mounting post 83, often ranked third and has 3 in mounting post 83, often ranked third in mounting post 83
Each 3rd mounting post is alongst arranged, and the 3rd mounting post 83 top is provided with screwed hole, and signal converting circuit board 6 is through lock
Tight screw locking installs column top the 3rd, and signal converting circuit board 6 is set up in the 3rd mounting post 83, and in signal converting electricity
Road plate assembly space formed below, the binding post on capacitor body 1 top is in described assembly space.This structure setting
Under, the mounting structure of signal converting circuit board is simple, and built on stilts design, it is easy to threading and radiating.
In addition, be covered with the binding post at described capacitor body 1 top insulating correspondingly with binding post
Cover 14, insulating boot 14 is fixedly mounted on the top cover of capacitor body 1, and insulating boot 14 side wall offers what power supply source line passed through
Threading fenestra 141.The protection of the line terminals that achieve a butt joint, and improve safety.Threading fenestra is preferentially opened in insulating boot direction
On the side wall of the length direction of capacitor body top cover, realize inner side wiring, overall more clean and tidy.
Claims (9)
1. a kind of Intelligent low-voltage power capacitor, including in set the capacitor body of capacitor core and located at capacitor body top
The control device in portion, control device includes chopper, and for gathering the voltage in phase line, the voltage and current signal of current signal adopts
Collector, for cutting off or connecting the switching mechanism of chopper and capacitor body, and single-chip microcomputer；
Described single-chip microcomputer includes the signal filtering shaping circuit being connected with voltage and current signal Acquisition Circuit,
The A/D converting unit being connected with signal filtering shaping circuit, for the signal of input is converted to digital signal,
The control of reactive power compensating unit being connected with A/D converting unit, the control of reactive power compensating unit inputs according to A/D converting unit
Signal carries out idle analysis to send reactive compensation switching order,
The zero passage being connected with signal filtering shaping circuit catches circuit, for the sine wave signal of input is converted to square-wave signal
And catch zero crossing output zero cross signal,
And operating passing zero control unit, based on the reactive compensation switching order of the control of reactive power compensating unit, and obtaining detection
Zero passage exports corresponding operating passing zero drive signal when catching the zero cross signal of circuit；
Described switching mechanism according to the corresponding cut-out of switching drive signal or connect chopper and capacitor body it is characterised in that：
Described the control of reactive power compensating unit is virtual protection computing unit,
Virtual protection computing unit includes logical operation module, for calculating voltage, electric current, active power, reactive power, power
Factor and harmonic content；
Memory module, the maximum voltage threshold values that is stored with, critical voltage threshold values, current threshold, power factor upper limit threshold values, power because
Number lower limit threshold values harmonic amount threshold values；
And comparison module, CL Compare Logic computing module calculates the magnitude of voltage obtaining and reaches critical voltage threshold values or exceed maximum electricity
During pressure valve value, excise control signal to operating passing zero control unit output capacitance fuse；CL Compare Logic computing module calculates and obtains
Current value exceed current threshold when, to operating passing zero control unit output capacitance fuse excise control signal；CL Compare Logic is transported
The harmonic content calculating module calculating acquisition exceedes during harmonic content threshold values to the excision control of operating passing zero control unit output capacitance fuse
Signal；Operating passing zero control unit is based on capacitor core excision control signal and drives letter to the excision of switching mechanism output capacitance fuse
Number thus excise capacitor body realize the overvoltage of capacitor core, excessively stream harmonic protection；
The power factor that described reactive compensation switching order includes described comparison module CL Compare Logic computing module calculating acquisition is big
In the power factor upper limit threshold values prestoring, then send the idle excision of excision capacitor body to operating passing zero control unit
Order, and when the power factor calculating is less than the power factor lower limit threshold values prestoring, then to operating passing zero control unit
Send the idle input order putting into capacitor body；
Described operating passing zero control unit based on reactive compensation switching order and detects the zero passage obtaining detection zero passage seizure circuit
Corresponding operating passing zero drive signal is exported, the operating passing zero reaching capacitor realizes reactive-load compensation during signal.
2. according to claim 1 Intelligent low-voltage power capacitor it is characterised in that：Described operating passing zero control unit also has
There is the delay circuit exporting operating passing zero drive signal for time delay, during the operating passing zero drive signal output that delay circuit determines
Between T3=zero cross signal obtain moment T0+ zero cross signal cycle T 1- switching mechanism switching T2 movement time.
3. according to claim 1 Intelligent low-voltage power capacitor it is characterised in that：Described single-chip microcomputer also includes temperature and surveys
Amount circuit, is provided with temperature sensor in capacitor body, and temperature sensor is connected with temperature measuring circuit realizes capacitor originally
Body temperature is monitored, and temperature measuring circuit is connected with A/D converting unit to be realized processes temperature signal and be converted to digital signal, described
Also be stored with the memory module of single-chip microcomputer threshold temperature, and the comparison module of virtual protection computing unit also has temperature survey
The temperature value of circuit measuring is compared with threshold temperature, temperature measuring circuit measure gained temperature value reach threshold temperature when to
Operating passing zero control unit output capacitor fuse excises control signal, and operating passing zero control unit is excised according to capacitor body
Control signal excises drive signal to switching mechanism output capacitance fuse, thus realizing the temperature protection of capacitor core.
4. according to claim 1 Intelligent low-voltage power capacitor it is characterised in that：Described switching mechanism includes magnetic and keeps continuing
Electrical equipment and the switching drive circuit for controlling magnetic latching relay, switching drive circuit is full bridge driving circuit.
5. according to claim 1 Intelligent low-voltage power capacitor it is characterised in that：Described virtual protection computing unit is to adopt
Fourier algorithm unit with Fourier algorithm.
6. according to claim 1 Intelligent low-voltage power capacitor it is characterised in that：It is additionally provided with for leading on described single-chip microcomputer
The CAN communication interface of news networking.
7. according to claim 1 Intelligent low-voltage power capacitor it is characterised in that：Described chopper is set up in capacitor originally
Body top, chopper installing space formed below, it is integrated with the signals collecting surface-mounted integrated circuit of voltage and current signal Acquisition Circuit
In the installing space below chopper, described capacitor body top has also set up signal converting circuit board, signal converting
Circuit board is arranged along capacitor body top length direction with chopper, and described switching mechanism is magnetic latching relay and is used for
The operating passing zero module that the switching drive circuit collection of magnetic latching relay shapes, operating passing zero module and single-chip microcomputer is controlled to be welded in
On signal converting circuit board, described signal converting circuit board and signals collecting surface-mounted integrated circuit are independently arranged and connect through holding wire
Connect, described single-chip microcomputer, operating passing zero module and signals collecting surface-mounted integrated circuit communicate through signal converting circuit board and connect.
8. according to claim 7 Intelligent low-voltage power capacitor it is characterised in that：The top of described capacitor body is provided with
The first mounting post and the second mounting post installed for signals collecting surface-mounted integrated circuit that supply chopper is installed, the second mounting post
Less than the first mounting post, chopper is set up in the first mounting post, and in chopper described installing space formed below, described letter
Number collection surface-mounted integrated circuit and be fixedly mounted on the second mounting column in installing space.
9. according to claim 7 or 8 Intelligent low-voltage power capacitor it is characterised in that：Described capacitor body top sets
Have the 3rd mounting post installed for signal converting circuit board, signal converting circuit board rack in the 3rd mounting post, and in signal
Switching circuit board assembly space formed below, the binding post on capacitor body top is in described assembly space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610993112.0A CN106451489A (en) | 2016-11-11 | 2016-11-11 | Intelligent low-voltage power capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610993112.0A CN106451489A (en) | 2016-11-11 | 2016-11-11 | Intelligent low-voltage power capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106451489A true CN106451489A (en) | 2017-02-22 |
Family
ID=58206840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610993112.0A Pending CN106451489A (en) | 2016-11-11 | 2016-11-11 | Intelligent low-voltage power capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106451489A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107212751A (en) * | 2017-07-28 | 2017-09-29 | 成都华津时代科技股份有限公司 | A kind of intelligence drinking-water terminal |
| CN109494756A (en) * | 2018-11-07 | 2019-03-19 | 杭州上盈电气有限公司 | A kind of intelligent powerless compensation capacitor |
| CN109586318A (en) * | 2018-12-27 | 2019-04-05 | 武汉世纪精能科技发展有限公司 | Reactive-load compensation method, user equipment, storage medium and device |
| CN110808574A (en) * | 2019-10-08 | 2020-02-18 | 联合汽车电子有限公司 | Protection method and protection system of filter capacitor and motor controller |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201466734U (en) * | 2009-07-02 | 2010-05-12 | 上海继铁电力自动化科技有限公司 | Intelligent phase control type low-voltage power capacitor |
| CN203243054U (en) * | 2013-05-21 | 2013-10-16 | 国家电网公司 | Intelligent low-voltage filter compensation module |
| CN203481833U (en) * | 2013-09-05 | 2014-03-12 | 林川 | Dynamic reactive power compensation integration module |
| CN103647289A (en) * | 2013-12-20 | 2014-03-19 | 淄博康润电气有限公司 | Capacitance-continuously-adjustable power capacitor control method and device |
| JP2016514946A (en) * | 2013-04-12 | 2016-05-23 | 劉昇▲皓▼ | Circuit system and control method for electronic converter |
-
2016
- 2016-11-11 CN CN201610993112.0A patent/CN106451489A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201466734U (en) * | 2009-07-02 | 2010-05-12 | 上海继铁电力自动化科技有限公司 | Intelligent phase control type low-voltage power capacitor |
| JP2016514946A (en) * | 2013-04-12 | 2016-05-23 | 劉昇▲皓▼ | Circuit system and control method for electronic converter |
| CN203243054U (en) * | 2013-05-21 | 2013-10-16 | 国家电网公司 | Intelligent low-voltage filter compensation module |
| CN203481833U (en) * | 2013-09-05 | 2014-03-12 | 林川 | Dynamic reactive power compensation integration module |
| CN103647289A (en) * | 2013-12-20 | 2014-03-19 | 淄博康润电气有限公司 | Capacitance-continuously-adjustable power capacitor control method and device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107212751A (en) * | 2017-07-28 | 2017-09-29 | 成都华津时代科技股份有限公司 | A kind of intelligence drinking-water terminal |
| CN109494756A (en) * | 2018-11-07 | 2019-03-19 | 杭州上盈电气有限公司 | A kind of intelligent powerless compensation capacitor |
| CN109586318A (en) * | 2018-12-27 | 2019-04-05 | 武汉世纪精能科技发展有限公司 | Reactive-load compensation method, user equipment, storage medium and device |
| CN110808574A (en) * | 2019-10-08 | 2020-02-18 | 联合汽车电子有限公司 | Protection method and protection system of filter capacitor and motor controller |
| CN110808574B (en) * | 2019-10-08 | 2022-09-06 | 联合汽车电子有限公司 | Protection method and protection system of filter capacitor and motor controller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106451489A (en) | Intelligent low-voltage power capacitor | |
| CN201532590U (en) | Temperature and humidity controller | |
| CN203365558U (en) | Circuit and device for three-phase power open-phase detection | |
| CN102891533B (en) | A kind of 800kV intelligent breaker | |
| CN108226645A (en) | A kind of vacuum circuit breaker divide-shut brake coil direct current resistance m easurem ent device | |
| CN103453998A (en) | Self-energy-taking wireless temperature sensor and achieving method thereof | |
| CN110456245A (en) | A kind of switchgear PD Online monitoring system | |
| CN209044025U (en) | A kind of dual power supply direct current system bus connection switch combined floodgate self-checking unit | |
| CN202651797U (en) | Low-voltage intelligent fast filter reactive compensation composite apparatus | |
| CN207352129U (en) | A kind of current zero-crossing point closing device of low-voltage circuit breaker characteristic test | |
| CN201846088U (en) | Intelligent capacitor with internal functions of electrical parameter measurement and protection | |
| CN107238750B (en) | A kind of network wave method for detecting based on operational amplifier circuit | |
| CN202978289U (en) | Reactive capacitor compensation cabinet | |
| CN105515491A (en) | Energy-saving protection control method and controller for multi-functional oil-pumping motor | |
| CN109253815B (en) | Wireless temperature sensor and application thereof | |
| CN203349964U (en) | Self-energy-obtaining wireless temperature sensing chip | |
| CN204287311U (en) | A kind of three-phase current sample circuit | |
| CN205374691U (en) | Excitation system static test appearance | |
| CN205281306U (en) | Intelligence exchanges and purifies constant voltage power supply | |
| CN213275830U (en) | A insulating monitoring module for new forms of energy electric automobile direct current fills electric pile | |
| CN210665002U (en) | Switch mechanical characteristic tester | |
| CN201336223Y (en) | Intelligent capacitor with function of harmonic protection | |
| CN209086347U (en) | A kind of new type inverter automatic detection device | |
| CN201359924Y (en) | Low-voltage intelligent capacitor | |
| CN203444980U (en) | Low voltage power capacitor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170222 |
|
| WD01 | Invention patent application deemed withdrawn after publication |