CN106026030B - A kind of towed elevator phase order of 3-phase AC protector and guard method - Google Patents
A kind of towed elevator phase order of 3-phase AC protector and guard method Download PDFInfo
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- CN106026030B CN106026030B CN201610320126.6A CN201610320126A CN106026030B CN 106026030 B CN106026030 B CN 106026030B CN 201610320126 A CN201610320126 A CN 201610320126A CN 106026030 B CN106026030 B CN 106026030B
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- phase
- transformer
- voltage
- power supply
- supply line
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Classifications
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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
Abstract
The present invention provides a kind of towed elevator phase order of 3-phase AC protector and guard method, wherein, the phase sequence relay includes three-phase transformer, amplitude information acquisition component and microprocessor, it include the first transformer in the three-phase transformer, second transformer and third transformer, it include having mutually isostructural first acquisition component in the amplitude information acquisition component, second acquisition component and third acquisition component, it include the amplitude magnitude regulator being mutually in parallel and amplitude direction discriminator in the acquisition component, it is connected between the amplitude information acquisition component and the microprocessor by external bus, it is connected between the acquisition component and the external bus by signal wire.A kind of towed elevator phase order of 3-phase AC protector and guard method that embodiment of the present invention provides, can accurately detect the phase sequence in towed elevator circuit, and can protect in time to circuit when phase sequence changes.
Description
Technical field
The present invention relates to technical field of automatic control more particularly to a kind of towed elevator phase order of 3-phase AC protectors
And guard method.
Background technique
Three-phase circuit in normal power supply system indicates power supply system 50Hz with red, green, yellow three kinds of colors respectively
Three alternating current line of force three-phases between relative rank.Exchange traction elevator system in, for ensure operational safety prevent because
The reversion of misphase motor causes the accident, and phase sequence changes between elevator three phase supply power supply line caused by not allowing because of the reason of wiring
The case where change, occurs, and related regulation regulation need to be by accessing the case where phase sequence component is to prevent phase sequence from changing.It is existing
Phase sequence relay often through normally opened and normally closed contact is arranged, when phase sequence occurring changing, pass through change touching
The normally opened or normally closed state of point, to protect the safety of circuit.However phase sequence relay in the prior art it sometimes appear that
The case where erroneous judgement, causes circuit that can close or can not protect to circuit suddenly.
Summary of the invention
Embodiment of the present invention is designed to provide a kind of towed elevator phase order of 3-phase AC protector and protection side
Method can accurately detect the phase sequence in towed elevator circuit, and can carry out in time to circuit when phase sequence changes
Protection.
To achieve the above object, embodiment of the present invention provides a kind of towed elevator phase order of 3-phase AC protector,
The towed elevator is powered by A phase power supply line, B phase power supply line and C phase power supply line by battery main switch, the phase sequence
Device includes three-phase transformer, amplitude information acquisition component and microprocessor, wherein in the three-phase transformer include respectively with
The A phase power supply line, B phase power supply line and C phase power supply line connected the first transformer, the second transformer and third transformation
Device, include in the amplitude information acquisition component respectively with first transformer, the second transformer and third transformer phase
Connection has mutually isostructural first acquisition component, the second acquisition component and a third acquisition component, in the acquisition component
Including the amplitude magnitude regulator being mutually in parallel and amplitude direction discriminator, the amplitude information acquisition component and the micro process
It is connected between device by external bus, is connected between the acquisition component and the external bus by signal wire.
Further, between each phase power supply line and corresponding transformer by fuse be connected, each transformer with it is corresponding
Acquisition component between by fuse be connected.
Further, the winding in each transformer in the three-phase transformer is connected using star-star connection method, with true
The primary side for protecting the three-phase transformer is identical as the voltage-phase of secondary side.
Further, it is also connected with and adopts between each transformer and the amplitude magnitude regulator in corresponding acquisition component
Sample buffer.
It further, include the fortune of model LM224J in the sample buffer and the amplitude magnitude regulator
Calculate amplifier.
To achieve the above object, the application also provides a kind of phase sequence method, which comprises according to default sampling
The voltage that period supplies the A phase power supply line, B phase power supply line and C phase power supply line samples, and obtains the three-phase alternating current
Electricity corresponding reference signal includes the three-phase voltage information group of preset quantity, three information of voltage in the reference signal
It include the A phase power supply line, B phase power supply line and the corresponding voltage amplitude size of C phase power supply line and voltage amplitude in group
Width direction；When the towed elevator works normally, acquired using first acquisition component, the second acquisition component and third
Component respectively to first transformer, the second transformer and third transformer output voltage carry out voltage amplitude size with
And the measurement in voltage amplitude direction, obtain voltage amplitude measurement result；The voltage amplitude measurement result and the benchmark are believed
Three-phase voltage information group in number compares, any three-phase in the voltage amplitude measurement result and the reference signal
When information of voltage group mismatches, generates misphase signal and the towed elevator is forbidden to start.
Further, the default sampling period is 100 microseconds, and the preset quantity of the three-phase voltage information group is
100。
By above-mentioned the application embodiment as it can be seen that the present invention is before towed elevator normal work, by the A phase electricity
The voltage of source line, B phase power supply line and the supply of C phase power supply line is sampled, corresponding so as to obtain the three-phase alternating current
Reference signal.It then can be by first acquisition component, the second acquisition component and third acquisition component respectively to institute
The voltage for stating the first transformer, the second transformer and the output of third transformer carries out voltage amplitude size and voltage amplitude side
To measurement, thus obtain towed elevator work normally when voltage amplitude measurement result.By the way that the voltage amplitude is measured
As a result it is compared with the reference signal, may thereby determine that whether occur phase sequence change in the circuit of current towed elevator
The case where, once occur, misphase signal can be generated and the towed elevator is forbidden to start.It can be seen that the present invention mentions
A kind of towed elevator phase order of 3-phase AC protector supplied and guard method, can be accurately to the phase in towed elevator circuit
Sequence is detected, and can be protected in time to circuit when phase sequence changes.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of phase sequence relay in the present invention；
Fig. 2 is the flow chart for the phase sequence method that embodiment of the present invention provides；
The schematic diagram that three-phase alternating current is sampled in Fig. 3 present invention.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in mode is applied, the technical solution in the application embodiment is clearly and completely described, it is clear that described
Embodiment is only a part of embodiment of the application, rather than whole embodiments.Based on the embodiment party in the application
Formula, all other embodiment obtained by those of ordinary skill in the art without making creative efforts, is all answered
When the range for belonging to the application protection.
The application embodiment provides a kind of towed elevator phase order of 3-phase AC protector, referring to Fig. 1, the traction
Elevator is powered by A phase power supply line 13, B phase power supply line and C phase power supply line by battery main switch 12, the phase sequence relay packet
Include three-phase transformer 10, amplitude information acquisition component and microprocessor 7, wherein include difference in the three-phase transformer 10
The first transformer, the second transformer and the third transformation being connected with the A phase power supply line, B phase power supply line and C phase power supply line
Device, include in the amplitude information acquisition component respectively with first transformer, the second transformer and third transformer phase
Connection has mutually isostructural first acquisition component, the second acquisition component and a third acquisition component, in the acquisition component
Including the amplitude magnitude regulator 3 being mutually in parallel and amplitude direction discriminator 5, the amplitude information acquisition component and micro- place
It manages and is connected between device 7 by external bus 8, is connected between the acquisition component and the external bus 8 by signal wire 4,6.
In one preferred embodiment of the application, pass through 11 phase of fuse between each phase power supply line and corresponding transformer
Even, it is connected between each transformer and corresponding acquisition component by fuse 9.
In one preferred embodiment of the application, the winding in each transformer in the three-phase transformer uses star
Connection connects, and the primary side 14 to ensure the three-phase transformer is identical as the voltage-phase of secondary side 1.
In one preferred embodiment of the application, in each transformer and the big minor adjustment of amplitude in corresponding acquisition component
Sample buffer 2 is also connected between device 3.
In one preferred embodiment of the application, wrapped in the sample buffer 2 and the amplitude magnitude regulator 3
Include the operational amplifier of model LM224J.
Phase sequence relay of the invention can be adapted for exchanging towed elevator TN-S power supply system, line voltage 380V.Such as
Shown in Fig. 1, the present invention uses three-phase transformer 10 to be depressured the higher pressure of primary side 14 for the lower voltage of secondary side 1, once
Side 14 and secondary side 1 all protect three-phase transformer and main circuit using fuse 9,11.Each transformation in three-phase transformer
Winding in device is all made of star-star connection method and connects, to ensure the primary side 14 of the three-phase transformer and the voltage of secondary side 1
Phase is identical.The size of 1 voltage of secondary side variation proportional to the size of 14 voltage of primary side, to 1 voltage phase sequence of secondary side
Detection is equivalent to the detection to 14 signal phase sequence of primary side.
In the present embodiment, after the decompression of three-phase transformer 10, the output voltage of secondary side 1 can be used as three-phase voltage
The measuring signal of phase sequence relay.The three-phase alternating current of power supply under normal circumstances, thirdly alternate phase sequence is certain, each mutually electricity
Size and phase relation between pressure within each period can change according to certain rule.Referring to Fig. 3, such as Fig. 3 institute
The three-phase voltage normalization waveform shown is deposited between certain three continuous sampling instant t1, t2, t3, three-phase voltage instantaneous value
Relationship as shown in Table 1.
A phase power supply line, B phase power supply line and the corresponding voltage of C phase power supply line are respectively indicated with A, B, C below.Such as 1 institute of table
Show, in the instantaneous value at t1 moment: A (phase amplitude is minimum, and direction is negative), B (phase amplitude is greater than A and is less than C, and direction is negative)；C
(phase amplitude is maximum, direction is positive)；In next sampling instant t2:A, (this voltage value is greater than last time t1 sampling instant A phase
Amplitude, this voltage be greater than B be less than C amplitude, direction is negative), B (this voltage value be less than last time t1 sampling instant B
The amplitude and amplitude of phase are less than A and C, and direction is negative)；(this voltage value is greater than the amplitude of last time t1 sampling instant C phase to C
Value, this voltage are greater than B, the amplitude greater than C, and direction is positive)；In next sampling instant t3:A, (this voltage value is greater than
The amplitude of last t2 sampling instant A phase, this voltage be greater than B be less than C amplitude, direction is positive), (this voltage value is small by B
It is less than A and C in the amplitude and amplitude of last t2 sampling instant B phase, direction is negative)；(this voltage value is less than the last time to C
The amplitude of t2 sampling instant C phase, this voltage are greater than B, the amplitude greater than C, and direction is positive).Since three-phase voltage is the period
Function, therefore these intrinsic relationships between three-phase can repeat within each period.
The state of three-phase voltage amplitude size and Orientation when 1 continuous sampling of table
In the present embodiment, the periodic law based on above-mentioned three-phase alternating voltage can be worked normally in towed elevator
Before, it is adopted according to the voltage that the default sampling period supplies the A phase power supply line, B phase power supply line and C phase power supply line
Sample, to obtain the corresponding reference signal of the three-phase alternating current.Including the three-phase electricity of preset quantity in the reference signal
Information group is pressed, includes that the A phase power supply line, B phase power supply line and C phase power supply line respectively correspond in three information of voltage groups
Voltage amplitude size and voltage amplitude direction.Wherein, the relative size that the voltage amplitude size can be as shown in table 1
Relationship, the voltage amplitude direction may be positive-negative relationship shown in table 1.
After obtaining the corresponding reference signal of three alternating currents, which can be logged the microprocessor
In 7.Then it can normally start the towed elevator, be detected with the phase sequence of the circuit to the towed elevator.Specifically
Ground can use first acquisition component, the second acquisition component and third acquisition when the towed elevator works normally
Component respectively to first transformer, the second transformer and third transformer output voltage carry out voltage amplitude size with
And the measurement in voltage amplitude direction, obtain voltage amplitude measurement result.Equally may include in the voltage amplitude measurement result
The A phase power supply line, B phase power supply line and the corresponding voltage amplitude size of C phase power supply line and voltage amplitude direction.This
Sample, by the way that the voltage amplitude measurement result and the three-phase voltage information group in the reference signal are compared, so as to
To determine when any three-phase voltage information group in the voltage amplitude measurement result and the reference signal mismatches, institute
Phase sequence change has occurred in the circuit for stating towed elevator, so as to generate misphase signal and the towed elevator is forbidden to start.
In concrete application scene, when the output voltage signal of a certain phase power supply line is continued for not changing, then
There is open phase fault at this time in proof, should generate disconnected phase signals and the towed elevator is forbidden to start.
In one practical application scene of the application, exchange towed elevator power supply system is TN-S power supply system, line voltage
380V.Each transformer can select 380/10V, and rated capacity is the three-phase transformer of 10VA, each three-phase transformer around
Group is connected using star-star connection method, and the primary side to ensure the three-phase transformer is identical as the voltage-phase of secondary side.Sampling
Buffer and amplitude size adjuster can select the operational amplifier of model LM224J.The type of amplitude direction discriminator
It number can be INA193.The microcontroller can select MSP430f169 chip.MSP430f169 microcontroller
FLASH memory can be used to store the reference signal.
In the application scenarios, before phase sequence relay investment protection operation, pretreatment operation can be carried out.Power grid power frequency
For 50Hz, the period is 10 milliseconds.100 electrical voltage points are acquired at equal intervals in one voltage cycle of power grid when pretreatment operation, therefore
Sampling period can be set as 100 microseconds, and order is stored in FLASH memory and completes base in temporal sequence by sampled result
The foundation of calibration signal.After putting into monitoring for protection, phase sequence relay is in 300 milliseconds within one duty cycle, between waiting the times
It is sampled three times every to three-phase voltage.Village can be between the sampled result and reference signal of any time three-phase voltage under normal circumstances
There are corresponding relationships.Therefore, for the three groups of three-phase voltage information sampled, if cannot match with the reference signal of storage
If, then the three-phase voltage information can be misphase information, and the microprocessor can be generated misphase signal and be transmitted to elevator control
In the voltage relay of system processed, elevator is forbidden to start.If the signal maintenance of a certain phase does not change, it is judged as and has occurred
Open phase fault issues disconnected phase signals accordingly, elevator is forbidden to start.
The application also provides a kind of phase sequence method.Referring to Fig. 2, the method may include following steps.
Step S1: the electricity that the A phase power supply line, B phase power supply line and C phase power supply line are supplied according to the default sampling period
Pressure is sampled, and the corresponding reference signal of the three-phase alternating current is obtained, and includes the three-phase of preset quantity in the reference signal
Information of voltage group includes that the A phase power supply line, B phase power supply line and C phase power supply line are right respectively in three information of voltage groups
The voltage amplitude size answered and voltage amplitude direction；
Step S2: the towed elevator work normally when, using first acquisition component, the second acquisition component and
Third acquisition component carries out voltage amplitude to the voltage of first transformer, the second transformer and third transformer output respectively
The measurement in width size and voltage amplitude direction obtains voltage amplitude measurement result；
Step S3: the three-phase voltage information group in the voltage amplitude measurement result and the reference signal is carried out pair
Than generating when any three-phase voltage information group in the voltage amplitude measurement result and the reference signal mismatches
Misphase signal simultaneously forbids the towed elevator to start.
In one preferred embodiment of the application, the default sampling period is 100 microseconds, the three-phase voltage information group
The preset quantity be 100.
By above-mentioned the application embodiment as it can be seen that the present invention is before towed elevator normal work, by the A phase electricity
The voltage of source line, B phase power supply line and the supply of C phase power supply line is sampled, corresponding so as to obtain the three-phase alternating current
Reference signal.It then can be by first acquisition component, the second acquisition component and third acquisition component respectively to institute
The voltage for stating the first transformer, the second transformer and the output of third transformer carries out voltage amplitude size and voltage amplitude side
To measurement, thus obtain towed elevator work normally when voltage amplitude measurement result.By the way that the voltage amplitude is measured
As a result it is compared with the reference signal, may thereby determine that whether occur phase sequence change in the circuit of current towed elevator
The case where, once occur, misphase signal can be generated and the towed elevator is forbidden to start.It can be seen that the present invention mentions
A kind of towed elevator phase order of 3-phase AC protector supplied and guard method, can be accurately to the phase in towed elevator circuit
Sequence is detected, and can be protected in time to circuit when phase sequence changes.
Those skilled in the art are supplied to the purpose described to the description of the various embodiments of the application above.It is not
It is intended to exhaustion or be not intended to and limit the invention to single disclosed embodiment.As described above, the application's is various
Substitution and variation will be apparent for above-mentioned technology one of ordinary skill in the art.Therefore, although specifically begging for
Some alternative embodiments are discussed, but other embodiment will be apparent or those skilled in the art are opposite
It is easy to obtain.The application is intended to include all substitutions of the invention discussed herein, modification and variation, and falls in
Other embodiment in the spirit and scope of above-mentioned application.
Each embodiment in this specification is described in a progressive manner, same and similar between each embodiment
Part may refer to each other, what each embodiment stressed is the difference with other embodiments.
Although depicting the application by embodiment, it will be appreciated by the skilled addressee that there are many deformations by the application
With variation without departing from spirit herein, it is desirable to which the attached claims include these deformations and change without departing from the application
Spirit.
Claims (5)
1. a kind of towed elevator phase order of 3-phase AC protector, the towed elevator is by A phase power supply line, B phase power supply line and C
Phase power supply line passes through battery main switch and powers, which is characterized in that the phase sequence relay includes that three-phase transformer, amplitude information are adopted
Collect component and microprocessor, wherein include in the three-phase transformer respectively with the A phase power supply line, B phase power supply line and
C phase power supply line connected the first transformer, the second transformer and third transformer include in the amplitude information acquisition component
What is be connected respectively with first transformer, the second transformer and third transformer has mutually isostructural first acquisition group
Part, the second acquisition component and third acquisition component, include in the acquisition component amplitude magnitude regulator being mutually in parallel and
Amplitude direction discriminator is connected between the amplitude information acquisition component and the microprocessor by external bus, described to adopt
It is connected between collection component and the external bus by signal wire；
It is connected between each phase power supply line and corresponding transformer by fuse, between each transformer and corresponding acquisition component
It is connected by fuse；
The winding in each transformer in the three-phase transformer is connected using star-star connection method, to ensure three phase-change pressure
The primary side of device and the voltage-phase of secondary side are identical.
2. phase sequence relay according to claim 1, which is characterized in that each transformer in corresponding acquisition component
Amplitude magnitude regulator between be also connected with sample buffer.
3. phase sequence relay according to claim 2, which is characterized in that the sample buffer and the amplitude size
It include the operational amplifier of model LM224J in adjuster.
4. a kind of guarantor of the towed elevator phase order of 3-phase AC protector as described in any claim in claims 1 to 3
Maintaining method, which is characterized in that the described method includes:
It is sampled according to the voltage that the default sampling period supplies the A phase power supply line, B phase power supply line and C phase power supply line,
The corresponding reference signal of the three-phase alternating current is obtained, includes the three-phase voltage information group of preset quantity in the reference signal,
It include the A phase power supply line, B phase power supply line and the corresponding voltage amplitude of C phase power supply line in the three-phase voltage information group
Width size and voltage amplitude direction；
When the towed elevator works normally, first acquisition component, the second acquisition component and third acquisition group are utilized
Part respectively to first transformer, the second transformer and third transformer output voltage carry out voltage amplitude size and
The measurement in voltage amplitude direction obtains voltage amplitude measurement result；
The voltage amplitude measurement result and the three-phase voltage information group in the reference signal are compared, when the voltage
When any three-phase voltage information group in amplitude measurement result and the reference signal mismatches, generates misphase signal and forbid
The towed elevator starting.
5. according to the method described in claim 4, it is characterized in that, the default sampling period is 100 microseconds, the three-phase electricity
The preset quantity for pressing 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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| CN106026030B true CN106026030B (en) | 2018-12-04 |
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