CN106026030A - Traction elevator three-phase AC phase sequence protector and protection method - Google Patents
Traction elevator three-phase AC phase sequence protector and protection method Download PDFInfo
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- CN106026030A CN106026030A CN201610320126.6A CN201610320126A CN106026030A CN 106026030 A CN106026030 A CN 106026030A CN 201610320126 A CN201610320126 A CN 201610320126A CN 106026030 A CN106026030 A CN 106026030A
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- transformator
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- 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
- H02H7/08—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 dynamo-electric motors
- H02H7/097—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 dynamo-electric motors against wrong direction of rotation
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- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
The invention provides a traction elevator three-phase AC phase sequence protector and protection method. The phase sequence protector comprises a three-phase transformer, an amplitude information acquisition assembly, and a microprocessor. The three-phase transformer comprises a first transformer, a second transformer and a third transformer. The amplitude information acquisition assembly comprises a first acquisition assembly, a second acquisition assembly, and a third acquisition assembly which have the same structure. Each acquisition assembly comprises an amplitude degree regulator and an amplitude direction discriminator connected in parallel. The amplitude information acquisition assembly is connected with the microprocessor via an external bus. The acquisition assemblies are connected with the external bus via signal lines. The traction elevator three-phase AC phase sequence protector and protection method may accurately detect the phase sequence in a traction elevator circuit and may timely protect the circuit when a phase sequence is changed.
Description
Technical field
The present invention relates to technical field of automatic control, particularly relate to a kind of towed elevator phase order of 3-phase AC
Protector and guard method.
Background technology
Three-phase circuit in normal power supply system represents power supply system by red, green, yellow three kinds of colors respectively
Relative rank between three alternating current line of force three-phases of system 50Hz.In exchange towed elevator system, for protecting
Barrier runs safety and prevents from, because the reversion of misphase motor causes the accident, not allowing because the reason of wiring causes elevator three
The situation that between phase power supply line, phase sequence changes occurs, and relevant code regulation need to be protected by accessing phase sequence
The situation that protecting assembly changes to prevent phase sequence.Existing phase sequence relay often through arrange normally opened and
Normally closed contact, when the situation occurring phase sequence to change, by changing the normally opened or normally closed state of contact,
Carry out the safety of protection circuit.But phase sequence relay of the prior art is it sometimes appear that the situation of erroneous judgement, leads
Send a telegraph road can close suddenly or cannot circuit be protected.
Summary of the invention
The purpose of embodiment of the present invention is to provide a kind of towed elevator phase order of 3-phase AC protector and guarantor
Maintaining method, it is possible to accurately the phase sequence in towed elevator circuit is detected, it is possible to when phase sequence changes
In time circuit is protected.
For achieving the above object, embodiment of the present invention provides a kind of towed elevator phase order of 3-phase AC guarantor
Protecting device, described towed elevator is always opened by power supply by A phase power line, B phase power line and C phase power line
Closing power supply, described phase sequence relay includes three-phase transformer, amplitude information acquisition component and microprocessor,
Wherein, described three-phase transformer includes electric with described A phase power line, B phase power line and C phase respectively
The first transformator, the second transformator and the 3rd transformator that source line is connected, described amplitude information acquisition component
Possessing of including being connected with described first transformator, the second transformator and the 3rd transformator respectively is identical
First acquisition component of structure, the second acquisition component and the 3rd acquisition component, described acquisition component includes
The amplitude magnitude regulator being in parallel mutually and amplitude direction descriminator, described amplitude information acquisition component is with described
It is connected by external bus between microprocessor, between described acquisition component and described external bus, passes through signal
Line is connected.
Further, it is connected by fuse between each phase power line and corresponding transformator, each transformator
And it is connected by fuse between corresponding acquisition component.
Further, the winding in each transformator in described three-phase transformer uses star-star connection method to connect,
The voltage-phase of primary side with secondary side to guarantee described three-phase transformer is identical.
Further, also connect between each transformator and the amplitude magnitude regulator in corresponding acquisition component
It is connected to sample buffer.
Further, described sample buffer and described amplitude magnitude regulator all include that model is
The operational amplifier of LM224J.
For achieving the above object, the application also provides for a kind of phase sequence method, and described method includes: according to
The voltage of described A phase power line, B phase power line and C phase power line supply is carried out by the default sampling period
Sampling, obtains the reference signal that described three-phase alternating current is corresponding, and described reference signal includes predetermined number
Three-phase voltage information group, described three information of voltage groups include described A phase power line, B phase power line with
And the respectively corresponding voltage amplitude size of C phase power line and voltage amplitude direction；At described towed elevator just
When often working, utilize described first acquisition component, the second acquisition component and the 3rd acquisition component respectively to institute
State the first transformator, the second transformator and the 3rd transformator output voltage carry out voltage amplitude size and
The measurement in voltage amplitude direction, obtains voltage amplitude measurement result；By described voltage amplitude measurement result and institute
The three-phase voltage information group stated in reference signal contrasts, when described voltage amplitude measurement result and described base
When arbitrary three-phase voltage information group in calibration signal is not mated, generate misphase signal and forbid described traction electricity
Ladder starts.
Further, the described default sampling period is 100 microseconds, described three-phase voltage information group described pre-
If quantity is 100.
From above-mentioned the application embodiment, the present invention is before towed elevator normally works, by institute
The voltage stating A phase power line, B phase power line and C phase power line supply is sampled, such that it is able to
To the reference signal that described three-phase alternating current is corresponding.Then can pass through described first acquisition component, second adopt
Collection assembly and the 3rd acquisition component are respectively to described first transformator, the second transformator and the 3rd transformator
The voltage of output carries out voltage amplitude size and the measurement in voltage amplitude direction, thus just obtains towed elevator
Often voltage amplitude measurement result during work.By by described voltage amplitude measurement result and described reference signal
Contrast, may thereby determine that the situation that phase sequence changes that whether occurs in that in the circuit of current towed elevator,
Once occur, then misphase signal can be generated and forbid that described towed elevator starts.As can be seen here, this
A kind of towed elevator phase order of 3-phase AC protector of bright offer and guard method, it is possible to accurately to traction
Phase sequence in lift circuit detects, it is possible to protect circuit in time when phase sequence changes.
Accompanying drawing explanation
Fig. 1 is the structural representation of phase sequence relay in the present invention；
The flow chart of the phase sequence method that Fig. 2 provides for embodiment of the present invention；
The schematic diagram in Fig. 3 present invention, three-phase alternating current sampled.
Detailed description of the invention
For the technical scheme making those skilled in the art be more fully understood that in the application, below in conjunction with this
Accompanying drawing in application embodiment, clearly and completely retouches the technical scheme in the application embodiment
State, it is clear that described embodiment is only a part of embodiment of the application rather than whole realities
Execute mode.Based on the embodiment in the application, those of ordinary skill in the art are not making creative labor
Other embodiments all obtained under dynamic premise, all should belong to the scope of the application protection.
The application embodiment provides a kind of towed elevator phase order of 3-phase AC protector, refers to Fig. 1,
Described towed elevator is passed through battery main switch 12 by A phase power line 13, B phase power line and C phase power line
Power supply, described phase sequence relay includes three-phase transformer 10, amplitude information acquisition component and microprocessor 7,
Wherein, described three-phase transformer 10 include respectively with described A phase power line, B phase power line and C phase
The first transformator, the second transformator and the 3rd transformator that power line is connected, described amplitude information collection group
Part includes possessing phase with described first transformator, the second transformator and the 3rd transformator are connected respectively
Isostructural first acquisition component, the second acquisition component and the 3rd acquisition component, wrap in described acquisition component
Include the amplitude magnitude regulator 3 and amplitude direction descriminator 5 being in parallel mutually, described amplitude information acquisition component
It is connected by external bus 8 with between described microprocessor 7, described acquisition component and described external bus 8
Between be connected by holding wire 4,6.
In the application one preferred implementation, between each phase power line and corresponding transformator, pass through fuse
11 are connected, and are connected by fuse 9 between each transformator and corresponding acquisition component.
In the application one preferred implementation, the winding in each transformator in described three-phase transformer is adopted
Connect by star-star connection method, the voltage-phase of primary side 14 with secondary side 1 to guarantee described three-phase transformer
Identical.
In the application one preferred implementation, big with the amplitude in corresponding acquisition component at each transformator
Sample buffer 2 it is also associated with between minor adjustment device 3.
In the application one preferred implementation, described sample buffer 2 and described amplitude magnitude regulator
The operational amplifier that model is LM224J is all included in 3.
The phase sequence relay of the present invention goes for exchanging towed elevator TN-S electric power system, and line voltage is
380V.As it is shown in figure 1, the present invention uses three-phase transformer 10 to be two by the higher pressure blood pressure lowering of primary side 14
The low voltage of secondary side 1, primary side 14 and secondary side 1 all use fuse 9,11 to protect three phase-change pressure
Device and main circuit.The winding in each transformator in three-phase transformer all uses star-star connection method to connect, with
Guarantee that the primary side 14 of described three-phase transformer is identical with the voltage-phase of secondary side 1.Secondary side 1 voltage
The change that is in proportion of size and primary side 14 voltage, it is right to be equivalent to the detection of secondary side 1 voltage phase sequence
The detection of primary side 14 signal phase sequence.
In the present embodiment, three-phase voltage after three-phase transformer 10 blood pressure lowering, the output voltage of secondary side 1
Can be as the measurement signal of phase sequence relay.Under normal circumstances, it is three alternate for the three-phase alternating current of power supply
Phase sequence is certain, and each phase voltage size within each cycle each other and phase relation can be according to one
Set pattern rule change.Refer to Fig. 3, three-phase voltage normalization waveform as shown in Figure 3, at certain three continuously
Sampling instant t1, t2, t3, deposit relation as shown in table 1 between three-phase voltage instantaneous value.
Represent that A phase power line, B phase power line and C phase power line are corresponding below respectively with A, B, C
Voltage.As shown in table 1, the instantaneous value in the t1 moment: A (phase amplitude is minimum, and direction is negative), B
(more than A and less than C, direction is negative to phase amplitude)；C (phase amplitude maximum, direction are just)；At next
Individual sampling instant t2:A (this magnitude of voltage more than the amplitude of last t1 sampling instant A phase, this
Voltage is more than B less than the amplitude of C, and direction be negative), B is (when this magnitude of voltage is sampled less than last time t1
Amplitude and the amplitude of carving B phase are less than A and C, and direction is negative)；(this magnitude of voltage is more than last t1 for C
The amplitude of sampling instant C phase, this voltage is more than B, amplitude more than C, and direction is just)；Connecing
(this magnitude of voltage is more than the amplitude of last t2 sampling instant A phase, basis for the sampling instant t3:A got off
Secondary voltage is more than B less than the amplitude of C, and direction just be), B (sample less than last t2 by this magnitude of voltage
The amplitude of moment B phase and amplitude are less than A and C, and direction is negative)；(this magnitude of voltage is less than the last time for C
The amplitude of t2 sampling instant C phase, this voltage is more than B, amplitude more than C, and direction is just).By
Being periodic function in three-phase voltage, therefore these the intrinsic passes between three-phase all can be repeated in tying up to each cycle
Occur.
The state of three-phase voltage amplitude size and Orientation during table 1 continuous sampling
In the present embodiment, periodic law based on above-mentioned three-phase alternating voltage, can at towed elevator just
Often before work, according to the default sampling period to described A phase power line, B phase power line and C phase power supply
The voltage of line supply is sampled, thus obtains the reference signal that described three-phase alternating current is corresponding.At described base
Calibration signal includes that the three-phase voltage information group of predetermined number, described three information of voltage groups include described A
The voltage amplitude size of phase power line, B phase power line and C phase power line correspondence respectively and voltage amplitude
Direction.Wherein, the relative size relation that described voltage amplitude size can be as shown in table 1, described voltage
Amplitude direction can also be the positive-negative relationship shown in table 1.
After obtaining the reference signal that described three alternating currents are corresponding, this reference signal can be logged described micro-
In processor 7.The most just described towed elevator can normally be started, with the circuit to described towed elevator
Phase sequence detects.Specifically, when described towed elevator normally works, it is possible to use described first gathers
Assembly, the second acquisition component and the 3rd acquisition component respectively to described first transformator, the second transformator with
And the 3rd transformator output voltage carry out voltage amplitude size and the measurement in voltage amplitude direction, obtain electricity
Pressure amplitude measurement result.Described voltage amplitude measurement result equally includes described A phase power line, B
The voltage amplitude size of phase power line and C phase power line correspondence respectively and voltage amplitude direction.So,
By described voltage amplitude measurement result is contrasted with the three-phase voltage information group in described reference signal,
May thereby determine that when the arbitrary three-phase voltage information in described voltage amplitude measurement result with described reference signal
When group is not mated, the circuit of described towed elevator there occurs that phase sequence changes, such that it is able to generate misphase signal
And forbid that described towed elevator starts.
In concrete application scenarios, when the output voltage signal of a certain phase power line is continued for not changing,
So prove now to occur in that open phase fault, it should generate disconnected phase signals and forbid that described towed elevator starts.
In the actual application scenarios of the application one, exchange towed elevator electric power system is TN-S electric power system, line
Voltage 380V.Each transformator can select 380/10V, and rated capacity is the three-phase transformer of 10VA, respectively
The winding of individual three-phase transformer uses star-star connection method to connect, with guarantee the primary side of described three-phase transformer with
The voltage-phase of secondary side is identical.Sample buffer and amplitude size actuator can select the model to be
The operational amplifier of LM224J.The model of amplitude direction descriminator can be INA193.Described microcontroller can
To select MSP430f169 chip.The FLASH memory of MSP430f169 microcontroller can be used to
Store described reference signal.
In this application scenarios, before phase sequence relay puts into protection operation, pretreatment operation can be carried out.
Electrical network power frequency is 50Hz, and the cycle is 10 milliseconds.When pretreatment runs in one voltage cycle of electrical network at equal intervals
Gathering 100 electrical voltage points, therefore the sampling period can be set as 100 microseconds, and by sampled result temporally
Sequence order is stored in FLASH memory the foundation completing reference signal.After putting into monitoring for protection, phase sequence
In within one the working cycle 300 milliseconds of protector, three-phase voltage is sampled three times by constant duration.
Between the sampled result of any time three-phase voltage and reference signal can there is corresponding closing in village under normal circumstances
System.Therefore, for the three groups of three-phase voltage information being sampled, if can not be with the reference signal phase stored
If joining, then this three-phase voltage information can be misphase information, and described microprocessor can generate misphase signal
Transmit to the voltage relay of apparatus for controlling elevator, forbid that elevator starts.If the signal of a certain phase maintains not
Change, be then judged as there occurs open phase fault, send corresponding disconnected phase signals, forbid that elevator starts.
The application also provides for a kind of phase sequence method.Referring to Fig. 2, described method can include following step
Suddenly.
Step S1: according to the default sampling period to described A phase power line, B phase power line and C phase power supply
The voltage of line supply is sampled, and obtains the reference signal that described three-phase alternating current is corresponding, described reference signal
Include that the three-phase voltage information group of predetermined number, described three information of voltage groups include described A phase power supply
The voltage amplitude size of line, B phase power line and C phase power line correspondence respectively and voltage amplitude direction；
Step S2: when described towed elevator normally works, utilizes described first acquisition component, the second collection
Assembly and the 3rd acquisition component are defeated to described first transformator, the second transformator and the 3rd transformator respectively
The voltage gone out carries out voltage amplitude size and the measurement in voltage amplitude direction, obtains voltage amplitude measurement result；
Step S3: described voltage amplitude measurement result is entered with the three-phase voltage information group in described reference signal
Row contrast, when described voltage amplitude measurement result is equal with the arbitrary three-phase voltage information group in described reference signal
When not mating, generate misphase signal and forbid that described towed elevator starts.
In the application one preferred implementation, the described default sampling period is 100 microseconds, described three-phase electricity
The described predetermined number of pressure information group is 100.
From above-mentioned the application embodiment, the present invention is before towed elevator normally works, by institute
The voltage stating A phase power line, B phase power line and C phase power line supply is sampled, such that it is able to
To the reference signal that described three-phase alternating current is corresponding.Then can pass through described first acquisition component, second adopt
Collection assembly and the 3rd acquisition component are respectively to described first transformator, the second transformator and the 3rd transformator
The voltage of output carries out voltage amplitude size and the measurement in voltage amplitude direction, thus just obtains towed elevator
Often voltage amplitude measurement result during work.By by described voltage amplitude measurement result and described reference signal
Contrast, may thereby determine that the situation that phase sequence changes that whether occurs in that in the circuit of current towed elevator,
Once occur, then misphase signal can be generated and forbid that described towed elevator starts.As can be seen here, this
A kind of towed elevator phase order of 3-phase AC protector of bright offer and guard method, it is possible to accurately to traction
Phase sequence in lift circuit detects, it is possible to protect circuit in time when phase sequence changes.
Above the describing of various embodiments of the application is supplied to people in the art with the purpose described
Member.It is not intended to exhaustive or is not intended to limit the invention to single disclosed embodiment.As
Upper described, various replacements and the change of the application will be aobvious for above-mentioned technology one of ordinary skill in the art
And be clear to.Therefore, although specifically discuss some alternative embodiments, but other embodiment party
Formula will be apparent from, or those skilled in the art relatively easily draw.The application is intended to be included in this
All replacements of the present invention discussed, amendment and change, and fall above-mentioned application spirit and
In the range of other embodiment.
Each embodiment in this specification all uses the mode gone forward one by one to describe, phase between each embodiment
As homophase part see mutually, each embodiment stress with other embodiments
Difference.
Although depicting the application by embodiment, it will be appreciated by the skilled addressee that the application has perhaps
Shape changeable and change are without deviating from spirit herein, it is desirable to appended claim includes these deformation and becomes
Change without deviating from spirit herein.
Claims (7)
1. a towed elevator phase order of 3-phase AC protector, described towed elevator is by A phase power line, B
Phase power line and C phase power line are powered by battery main switch, it is characterised in that described phase sequence relay
Including three-phase transformer, amplitude information acquisition component and microprocessor, wherein, in described three-phase transformer
Including the first transformator being connected with described A phase power line, B phase power line and C phase power line respectively,
Two transformators and the 3rd transformator, described amplitude information acquisition component include respectively with described first transformation
What device, the second transformator and the 3rd transformator were connected possess mutually isostructural first acquisition component, second
Acquisition component and the 3rd acquisition component, described acquisition component includes the amplitude magnitude regulator being in parallel mutually
With amplitude direction descriminator, between described amplitude information acquisition component and described microprocessor, pass through external bus
It is connected, is connected by holding wire between described acquisition component with described external bus.
Phase sequence relay the most according to claim 1, it is characterised in that each phase power line is with corresponding
It is connected by fuse between transformator, by fuse phase between each transformator and corresponding acquisition component
Even.
Phase sequence relay the most according to claim 1, it is characterised in that in described three-phase transformer
Winding in each transformator uses star-star connection method to connect, with guarantee the primary side of described three-phase transformer with
The voltage-phase of secondary side is identical.
Phase sequence relay the most according to claim 1, it is characterised in that at each transformator with corresponding
Acquisition component in amplitude magnitude regulator between be also associated with sample buffer.
Phase sequence relay the most according to claim 4, it is characterised in that described sample buffer and
Described amplitude magnitude regulator all includes the operational amplifier that model is LM224J.
6. the towed elevator phase order of 3-phase AC as described in any claim in claim 1 to 5
The guard method of protector, it is characterised in that described method includes:
The electricity described A phase power line, B phase power line and C phase power line supplied according to the default sampling period
Pressure is sampled, and obtains the reference signal that described three-phase alternating current is corresponding, and described reference signal includes presetting
The three-phase voltage information group of quantity, described three information of voltage groups include described A phase power line, B phase power supply
The voltage amplitude size of line and C phase power line correspondence respectively and voltage amplitude direction；
When described towed elevator normally works, utilize described first acquisition component, the second acquisition component and
The voltage that described first transformator, the second transformator and the 3rd transformator are exported by the 3rd acquisition component respectively
Carry out voltage amplitude size and the measurement in voltage amplitude direction, obtain voltage amplitude measurement result；
Described voltage amplitude measurement result is contrasted with the three-phase voltage information group in described reference signal,
When described voltage amplitude measurement result is not mated with the arbitrary three-phase voltage information group in described reference signal
Time, generate misphase signal and forbid that described towed elevator starts.
Method the most according to claim 6, it is characterised in that the described default sampling period is 100 micro-
Second, the described predetermined number of described three-phase voltage information group is 100.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610320126.6A CN106026030B (en) | 2016-05-13 | 2016-05-13 | A kind of towed elevator phase order of 3-phase AC protector and guard method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610320126.6A CN106026030B (en) | 2016-05-13 | 2016-05-13 | A kind of towed elevator phase order of 3-phase AC protector and guard method |
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| Publication Number | Publication Date |
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| CN106026030A true CN106026030A (en) | 2016-10-12 |
| CN106026030B CN106026030B (en) | 2018-12-04 |
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| CN106026030B (en) | 2018-12-04 |
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