CN107677912A - A kind of detection device and detection method of low pressure automatic phase selecting load equalizer - Google Patents
A kind of detection device and detection method of low pressure automatic phase selecting load equalizer Download PDFInfo
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- CN107677912A CN107677912A CN201711099857.3A CN201711099857A CN107677912A CN 107677912 A CN107677912 A CN 107677912A CN 201711099857 A CN201711099857 A CN 201711099857A CN 107677912 A CN107677912 A CN 107677912A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- 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
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- 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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
This application discloses a kind of detection device and detection method of low pressure automatic phase selecting load equalizer, the detection device includes isolating transformer, lv contactor, detection control apparatus and load, wherein, the input of the isolating transformer is connected to low pressure 380V platforms and becomes outlet, the on high-tension side wiring group of the isolating transformer is that the wiring group of triangle and low-pressure side is star-like, the output end connection three-phase four wire system of the isolating transformer；This equipment can be before low pressure automatic phase selecting load equalizer comes into operation, carry out the detection of performance function, some substandard products are avoided to come into operation, so as to cause unnecessary economic loss, avoid using traditional detection mode, so as to avoid influenceing the normal operation of power supply enterprise, prevent operating personnel from being got an electric shock using conventional on-site detection mode, ensure the safety of operating personnel.
Description
Technical field
The application is related to a kind of detection device technical field, more particularly to a kind of low pressure automatic phase selecting load equalizer
Detection device and detection method.
Background technology
At present, China's low-voltage network all matches somebody with somebody net mode using three-phase four-wire system substantially, and almost all of distribution transforming is all present
The phenomenon of three-phase imbalance, and energy imbalance has had a strong impact on the regular supply of electric energy close to absolutely, so as to low pressure certainly
Dynamic phase selection load equalizer large-scale application in power network, so that three-phase imbalance phenomenon to be adjusted.
At present, in the presence of three uneven regulations of some devices in the low pressure automatic phase selecting load equalizer to come into operation
Effect does not reach the problems such as testing staff requires, precision is poor and fault rate is higher, and many economic damages are caused to power grid enterprises
Lose.Due to automatic phase selecting bascule at the scene installation and operation when, it usually needs carry out the performance of automatic phase selecting bascule, work(
Energy and system testing, and then need to carry out under power-off condition when testing automatic phase selecting bascule, by artificial
Tested, can thus greatly increase the power failure amount of power supply enterprise, influence the normal operation of power supply enterprise；If with electrical measurement
If examination, operating personnel will have electric shock risk, and due guarantee is not had to personal safety.
Therefore, need badly and invent a kind of detection device of low pressure automatic phase selecting load equalizer, with low pressure automatic phase selecting
Before load equalizer comes into operation, it can realize and the performance, function and system of device are tested.
The content of the invention
It is low to solve this application provides a kind of detection device and detection method of low pressure automatic phase selecting load equalizer
Press the test problems of automatic phase selecting load equalizer.
In order to solve the above-mentioned technical problem, the embodiment of the invention discloses following technical scheme：
The embodiments of the invention provide a kind of detection device of low pressure automatic phase selecting load equalizer, for testing low pressure
Automatic phase selecting load equalizer, the low pressure automatic phase selecting load equalizer include phase-controlled device and phase line switching switch
Case, phase-controlled device and phase line switching switch-box electrically connects, it is characterised in that the detection device includes isolating transformer, low
Tentaculum, detection control apparatus and load are crimped, wherein,
The input of the isolating transformer be connected to low pressure 380V platforms become outlet, the isolating transformer it is on high-tension side
Wiring group is that the wiring group of triangle and low-pressure side is star-like, the output end connection three-phase and four-line of the isolating transformer
System；
One end of three contacts of the lv contactor is in parallel respectively to be accessed in the three-phase line of three-phase four wire system, institute
The other end for stating three contacts electrically connects with phase line switching switch-box respectively, described phase line switching switch-box one end and three-phase and four-line
The zero line electrical connection of system, the load end series connection load of the phase line switching switch；
The detection control apparatus is electrically connected with the lv contactor, phase line switching switch-box and phase-controlled device respectively
Connect.
Preferably, the detection control apparatus includes contactor control module, controller control module, calculates analysis mould
Block, switch-box control module and functional performance detection control module, wherein,
Functional performance detection control module respectively with controller control module, computation analysis module and the switch-box
Control module electrically connects, and the computation analysis module electrically connects with the contactor control module；
The contactor control module is electrically connected to the lv contactor, and the controller control module is electrically connected to institute
Phase-controlled device is stated, the switch-box control module is electrically connected to the phase line switching switch-box.
Preferably, the load is load or burden without work, and the load or burden without work is made up of capacitor and reactor.
A kind of method for detecting low pressure automatic phase selecting load equalizer, applied to low pressure automatic phase selecting load equalizer
Detection device, wherein, low pressure automatic phase selecting load equalizer include electrical connection phase-controlled device and phase line switching switch
Case, the detection device include isolating transformer, lv contactor, detection control apparatus and load, it is characterised in that the side
Method includes：
Detection control apparatus receives the phase selection Type Control instruction that testing staff sends, and the phase selection Type Control is referred to
Order is sent to phase-controlled device, so that phase-controlled device phase line according to the Type Control of control instruction switches switch-box
Select automatic mode phase-controlled or manual mode phase-controlled；
If the phase selection Type Control instruction instructs for manual phase-controlled, the phase-controlled device controls the phase line to cut
Switch-box locking is changed, and judges whether the phase line switching switch-box acts；
If the phase line switching switch-box action, determines that the low pressure automatic phase selecting load equalizer is unqualified；
If the phase line switching switch-box is failure to actuate, it is uneven that detection control apparatus receives the three-phase current that testing staff sends
Weighing apparatus degree threshold value and default three-phase current unbalance angle value, by the detection control apparatus according to the default three-phase current unbalance
Angle value controls the corresponding contact closure of lv contactor, so that wherein phase line accesses load all the way in three-phase line；
The phase line switching switch-box carries out degree of unbalancedness regulation according to the current value of access by testing staff, and will be manual
Three-phase current unbalance angle value after regulation is sent to detection control apparatus by phase-controlled device；
The detection control apparatus is according to the three-phase current unbalance angle value after the regulation manually and the three-phase current
Degree of unbalancedness threshold value, judge whether the low pressure automatic phase selecting load equalizer is qualified；
If the phase selection Type Control instruction is automatic phase selecting control instruction, the detection control apparatus receives and comes from phase line
Switch the three-phase current unbalance angle value of switch-box feedback；
Detection control apparatus controls phase line switching switch-box action according to the three-phase current unbalance angle value of the feedback, by
Phase line switching switch-box carries out degree of unbalancedness regulation, and the three-phase current unbalance degree after automatically adjusting to three-phase current automatically
Value is sent to detection control apparatus by the phase-controlled device；
Three-phase current unbalance angle value after being automatically adjusted described in detection control apparatus reception, and automatically adjusted according to described
Three-phase current unbalance angle value afterwards and three-phase current unbalance degree threshold value, judge the low pressure automatic phase selecting load equalizer
It is whether qualified.
Preferably, it is described to judge whether the low pressure automatic phase selecting load equalizer is qualified, including：
Judge whether the three-phase current unbalance angle value after the regulation manually is less than the three-phase current unbalance degree threshold
Value；
If the three-phase current unbalance angle value after the regulation manually or the three-phase current unbalance angle value after automatically adjusting
Less than the three-phase current unbalance degree threshold value, it is determined that detected low pressure automatic phase selecting load equalizer is qualified；Otherwise,
It is unqualified.
Preferably, the detection control apparatus includes contactor control module, controller control module, calculates analysis mould
Block, switch-box control module and functional performance detection control module, wherein, the detection control apparatus receives testing staff and sent
Default three-phase current unbalance angle value, controlled by the detection control apparatus according to the default three-phase current unbalance angle value
The corresponding contact closure of lv contactor, including：
Functional performance detection control module receives the default three-phase current unbalance angle value that testing staff sends, and by described in
Default three-phase current unbalance angle value is transmitted to computation analysis module；
Computation analysis module generates contactor control signal according to the default three-phase current unbalance angle value, and is sent to
The contactor control module；
The contactor control module generates contactor control instruction according to the contactor control signal, and is sent to institute
Lv contactor is stated, so that the lv contactor controls corresponding contact closure.
Preferably, the computation analysis module is according to the default three-phase current unbalance angle value generation contactor control letter
Number, including：
The uneven angle value of three-phase current is the difference and maximum phase current value of maximum phase current value and minimum phase current values
Than；
After the load access phase line, there is fixed current value in corresponding phase line, the computation analysis module is by calculating
Maximum phase current value and minimum phase current values are determined, so that it is determined that it is maximum mutually with the minimum phase load to be accessed, it is maximum mutually silent
Think A phase lines, minimum is mutually defaulted as B phase lines or C phase lines, and the contact closure that the lv contactor concatenates with A, B or C phase line is then
Load is accessed in corresponding phase line, and the computation analysis module generates contactor control signal.
Compared with prior art, beneficial effects of the present invention are：This equipment can set three-phase electricity by detection control apparatus
Degree of unbalancedness threshold value and default three-phase current unbalance angle value are flowed, and controls each lv contactor to move by detection control apparatus
Make, regulation three-phase access load, by three-phase current unbalance angle value regulation to default three-phase current unbalance angle value, Ran Houtong
Cross detection control apparatus and send phase selection Type Control and instruct and give phase-controlled device, to realize the manual mode of phase line switching switch-box
Regulation or the selection of automatic mode regulation, the three-phase imbalance angle value after adjusting or automatically adjust manually can pass through phase-controlled device
Detection control apparatus is fed back to, is compared with the three-phase current unbalance degree threshold value set, if less than three-phase current not
Degree of balance threshold value, then the degree of unbalancedness regulatory function of low pressure automatic phase selecting load equalizer is qualified, otherwise, unqualified, originally sets
The standby detection that before low pressure automatic phase selecting load equalizer comes into operation, can carry out performance function, avoids some unqualified productions
Product come into operation, and so as to cause unnecessary economic loss, avoid using traditional detection mode, so as to avoid influenceing power supply enterprise
The normal operation of industry, prevent operating personnel from being got an electric shock using traditional approach, ensure the safety of operating personnel.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme of the application, letter will be made to the required accompanying drawing used in embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation of the detection device for low pressure automatic phase selecting load equalizer that the application provides；
Fig. 2 is a kind of experiment process figure of the detection device for low pressure automatic phase selecting load equalizer that the application provides.
Embodiment
In order that those skilled in the art more fully understand the technical scheme in the present invention, below in conjunction with of the invention real
The accompanying drawing in example is applied, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described implementation
Example only part of the embodiment of the present invention, rather than whole embodiments.It is common based on the embodiment in the present invention, this area
The every other embodiment that technical staff is obtained under the premise of creative work is not made, should all belong to protection of the present invention
Scope.
Referring to Fig. 1, Fig. 1 is a kind of structure of the detection device for low pressure automatic phase selecting load equalizer that the application provides
Schematic diagram, this equipment include isolating transformer, lv contactor, detection control apparatus and load, the isolating transformer of equipment
Input is connected to low pressure 380V platforms and becomes outlet, and the on high-tension side wiring group of isolating transformer is triangle and low-pressure side
For wiring group to be star-like, isolating transformer can isolate high pressure, so as to realize protection to each module of equipment, isolating transformer it is defeated
Go out end connection three-phase four wire system.
Respectively in the three-phase line of access three-phase four wire system in parallel, three are touched for one end of three contacts of lv contactor
The other end of head electrically connects with phase line switching switch-box respectively, the zero line electricity of phase line switching switch-box one end and three-phase four wire system
Connection, the load end series load of phase line switching switch；One in three contacts of closed low contactor, then load can be connect
Enter the corresponding phase line with respective contacts concatenation, be easy to implement the regulation to presetting three-phase current unbalance degree.
Detection control apparatus includes contactor control module, controller control module, computation analysis module, switch-box control
Module and functional performance detection control module, functional performance detection control module respectively with the controller control module, calculate
Analysis module and the electrical connection of switch-box control module, computation analysis module electrically connect with contactor control module；Contactor controls
Module is electrically connected to lv contactor, and controller control module is electrically connected to phase-controlled device, the electrical connection of switch-box control module
Switch switch-box to phase line.
Load is load or burden without work, and load or burden without work is made up of capacitor and reactor, and load or burden without work is not done work.
Referring to Fig. 2, Fig. 2 is a kind of system of the detection device for low pressure automatic phase selecting load equalizer that the application provides
Experiment process figure, low pressure automatic phase selecting load equalizer is accessed into detection device.
S101：Input manual phase-controlled instruction.
Functional performance detection control module receives the manual phase-controlled instruction that testing staff sends, and by manual phase selection control
System instruction is sent to phase-controlled device, phase-controlled device control phase line switching switch-box by controller control module and automatically adjusted
Pattern locking.
S102：Whether tested device acts.
Judge whether phase line switching switch-box acts, if phase line switching switch-box action, it is determined that phase-controlled device and phase
The logical instruction of line switching switch-box is abnormal, and the instruction for automatically adjusting pattern locking can not be passed to phase line switching and opened by phase-controlled device
Case is closed, then it is unqualified to be tested low pressure automatic phase selecting load equalizer.
S103：It is 20% to set three-phase current unbalance degree threshold value.
If phase line switching switch-box is failure to actuate, functional performance detection control apparatus receives the three-phase current that testing staff sends
Degree of unbalancedness threshold value, three-phase current unbalance degree threshold value are set as 20%, and three-phase current unbalance degree threshold value is used to judge to be tested
Whether low pressure automatic phase selecting load equalizer is qualified.
S104：The default three-phase current unbalance degree of input is the arbitrary value more than 20% less than 100%.
Functional performance detection control module receives testing staff and presets three-phase imbalance angle value, presets three-phase imbalance angle value
The arbitrary value for being less than 100% more than 20% is may be set to, by detection control apparatus according to default three-phase current unbalance angle value
The corresponding contact closure of lv contactor is controlled, so that wherein phase line accesses load all the way in three-phase line；
S105：Degree of unbalancedness analysis calculates.
Functional performance detects control module and default three-phase current unbalance angle value is transmitted into computation analysis module, calculates and divides
Analyse after module calculates according to default three-phase current unbalance angle value and generate contactor control signal；
The uneven angle value of three-phase current is the difference and maximum phase current value of maximum phase current value and minimum phase current values
Than, after load accesses corresponding phase line by some contact of lv contactor, fixed current value is produced in corresponding phase line,
Computation analysis module is by calculating determination maximum phase current value and minimum phase current values, so that it is determined that maximum will mutually connect with minimum phase
The load entered, maximum are mutually defaulted as A phase lines, and minimum is mutually defaulted as B phase lines or C phase lines, lv contactor and A, B or C phase line string
The contact closure connect, then in the corresponding phase line of load access, computation analysis module accordingly generates contactor control signal.
S106：Contactor control module receives the contactor control signal that computation analysis module is sent.
S107：Lv contactor receives the control instruction of contactor control module.
After lv contactor receives control instruction, corresponding contact closure, make wherein phase line access all the way in three-phase line
Load, by three-phase current unbalance degree regulation to default three-phase current unbalance angle value.
S108：Load adjustment result returns to functional performance detection control module.
Phase-controlled device switches the three-phase current unbalance angle value after switch-box reads regulation by phase line, and passes through control
Device control module feeds back to functional performance detection control module.
S109：Testing staff carries out manual mode regulation.
In flow S101, tested low pressure automatic phase selecting load equalizer automatically adjusts pattern locking, detection
Testing staff can manually adjust phase line switching switch-box, so that default three-phase current unbalance degree to be adjusted.
S110：Input automatic phase selecting control instruction.
Functional performance detection control module receives the automatic phase selecting control instruction that testing staff sends, and passes through controller control
Automatic phase selecting control instruction is sent to phase-controlled device, the manual tune of phase-controlled device control phase line switching switch-box by molding block
Section pattern locking.Phase-controlled device receives the three-phase current unbalance angle value of phase line switching switch-box feedback, and by three-phase current
Uneven angle value feeds back to functional performance by controller control module and detects control module.
S111：Tested device acts.
Functional performance detection control module passes through switch-box control module control according to the three-phase current unbalance angle value of feedback
Phase line switching switch-box action processed, three-phase current unbalance degree is adjusted automatically by phase line switching switch-box.
S112：The result of the action returns to functional performance detection control module.
Phase-controlled device can read the three-phase current unbalance angle value after adjusting and automatically adjust manually respectively, and pass through control
Device control module processed, the three-phase current unbalance angle value after regulation is fed back into functional performance detection control module.
S113：Judge whether the result of the action is less than three-phase current unbalance degree threshold value 20%.
Judging the three-phase current unbalance angle value after regulation manually or the three-phase current unbalance angle value after automatically adjusting is
It is no to be less than three-phase current unbalance degree threshold value；
If the three-phase current unbalance angle value after regulation or the three-phase current unbalance angle value after automatically adjusting are less than manually
Three-phase current unbalance degree threshold value, it is determined that detected low pressure automatic phase selecting load equalizer is qualified；Otherwise, it is unqualified.
It should be noted that herein, term " comprising ", "comprising" or its any other variant are intended to non-row
His property includes, so that process, method, article or equipment including a series of elements not only include those key elements, and
And also include the other element being not expressly set out, or also include for this process, method, article or equipment institute inherently
Key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that including institute
State in process, method, article or the equipment of key element and other identical element also be present.
Described above is only the embodiment of the present invention, is made skilled artisans appreciate that or realizing this hair
It is bright.A variety of modifications to these embodiments will be apparent to one skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (7)
- A kind of 1. detection device of low pressure automatic phase selecting load equalizer, for testing low pressure automatic phase selecting balancing the load dress Put, the low pressure automatic phase selecting load equalizer includes phase-controlled device and phase line switching switch-box, phase-controlled device and phase Line switching switch-box electrical connection, it is characterised in that the detection device includes isolating transformer, lv contactor, detection control Device and load, wherein,The input of the isolating transformer is connected to low pressure 380V platforms and becomes outlet, the on high-tension side wiring of the isolating transformer Group is that the wiring group of triangle and low-pressure side is star-like, the output end connection three-phase four wire system of the isolating transformer；One end of three contacts of the lv contactor is in parallel respectively to be accessed in the three-phase line of three-phase four wire system, and described three The other end of individual contact electrically connects with phase line switching switch-box respectively, described phase line switching switch-box one end and three-phase four wire system Zero line electrical connection, the load end of phase line switching switch connects the load；The detection control apparatus electrically connects with the lv contactor, phase line switching switch-box and phase-controlled device respectively.
- 2. detection device according to claim 1, it is characterised in that the detection control apparatus includes contactor control mould Block, controller control module, computation analysis module, switch-box control module and functional performance detection control module, wherein,The functional performance detection control module controls with the controller control module, computation analysis module and switch-box respectively Module electrically connects, and the computation analysis module electrically connects with the contactor control module；The contactor control module is electrically connected to the lv contactor, and the controller control module is electrically connected to the choosing Phase control device, the switch-box control module are electrically connected to the phase line switching switch-box.
- 3. detection device according to claim 1, it is characterised in that the load is load or burden without work, the load or burden without work It is made up of capacitor and reactor.
- A kind of 4. method for detecting low pressure automatic phase selecting load equalizer, applied to low pressure automatic phase selecting load equalizer Detection device, wherein, low pressure automatic phase selecting load equalizer includes the phase-controlled device and phase line switching switch-box of electrical connection, The detection device includes isolating transformer, lv contactor, detection control apparatus and load, it is characterised in that methods described Including：Detection control apparatus receives the phase selection Type Control instruction that testing staff sends, and the phase selection Type Control is instructed and sent out Phase-controlled device is delivered to, so that phase-controlled device phase line switching switch-box selection according to the Type Control of control instruction Automatic mode phase-controlled or manual mode phase-controlled；If the phase selection Type Control instruction instructs for manual phase-controlled, the phase-controlled device controls the phase line switching to open Case locking is closed, and judges whether the phase line switching switch-box acts；If the phase line switching switch-box action, determines that the low pressure automatic phase selecting load equalizer is unqualified；If the phase line switching switch-box is failure to actuate, detection control apparatus receives the three-phase current unbalance degree that testing staff sends Threshold value and default three-phase current unbalance angle value, by the detection control apparatus according to the default three-phase current unbalance angle value The corresponding contact closure of the lv contactor is controlled, so that wherein phase line accesses load all the way in three-phase line；The phase line switching switch-box carries out degree of unbalancedness regulation according to the current value of access by testing staff, and will adjust manually Three-phase current unbalance angle value afterwards is sent to detection control apparatus by phase-controlled device；The detection control apparatus is uneven according to the three-phase current unbalance angle value after the regulation manually and the three-phase current Weighing apparatus degree threshold value, judge whether the low pressure automatic phase selecting load equalizer is qualified；If the phase selection Type Control instruction is automatic phase selecting control instruction, the detection control apparatus receives to be switched from phase line The three-phase current unbalance angle value of switch-box feedback；Detection control apparatus controls phase line switching switch-box action according to the three-phase current unbalance angle value of the feedback, by phase line Switch switch-box and carry out degree of unbalancedness regulation to three-phase current automatically, and the three-phase current unbalance angle value after automatically adjusting is led to Cross the phase-controlled device and be sent to detection control apparatus；Detection control apparatus receive described in automatically adjust after three-phase current unbalance angle value, and according to described automatically adjust after Whether three-phase current unbalance angle value and three-phase current unbalance degree threshold value, judge the low pressure automatic phase selecting load equalizer It is qualified.
- 5. according to the method for claim 4, it is characterised in that described to judge the low pressure automatic phase selecting load equalizer It is whether qualified, including：Judging the three-phase current unbalance angle value after the regulation manually or the three-phase current unbalance angle value after automatically adjusting is It is no to be less than the three-phase current unbalance degree threshold value；If the three-phase current unbalance angle value after the regulation manually or the three-phase current unbalance angle value after automatically adjusting are less than The three-phase current unbalance degree threshold value, it is determined that detected low pressure automatic phase selecting load equalizer is qualified；Otherwise, do not conform to Lattice.
- 6. according to the method for claim 4, it is characterised in that the detection control apparatus include contactor control module, Controller control module, computation analysis module, switch-box control module and functional performance detection control module, wherein, the inspection Survey control device and receive the default three-phase current unbalance angle value that testing staff sends, as the detection control apparatus according to Default three-phase current unbalance angle value controls the corresponding contact closure of lv contactor, including：Functional performance detection control module receives the default three-phase current unbalance angle value that testing staff sends, and will be described default Three-phase current unbalance angle value is transmitted to computation analysis module；Computation analysis module generates contactor control signal according to the default three-phase current unbalance angle value, and is sent to described Contactor control module；The contactor control module generates contactor control instruction according to the contactor control signal, and is sent to described low Tentaculum is crimped, so that the lv contactor controls corresponding contact closure.
- 7. according to the method for claim 6, it is characterised in that the computation analysis module is according to the default three-phase current Uneven angle value generates contactor control signal, including：The uneven angle value of three-phase current is the ratio of maximum phase current value and the difference and maximum phase current value of minimum phase current values；After the load access phase line, there is fixed current value in corresponding phase line, the computation analysis module determines by calculating Maximum phase current value and minimum phase current values, so that it is determined that maximum phase and the minimum phase load to be accessed；Wherein, setting is maximum A phase lines are mutually defaulted as, minimum is mutually defaulted as B phase lines or C phase lines, and the contact that the lv contactor concatenates with A, B or C phase line closes Close then load to access in corresponding phase line, the computation analysis module generates contactor control signal.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110907740A (en) * | 2019-12-12 | 2020-03-24 | 云南电网有限责任公司临沧供电局 | Automatic commutation equipment detection device and method based on PWM converter |
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| CN107677912B (en) | 2018-12-25 |
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