CN114884430A - Speed detection method, device, equipment and medium for steelmaking converter - Google Patents
Speed detection method, device, equipment and medium for steelmaking converter Download PDFInfo
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- 238000009628 steelmaking Methods 0.000 title claims abstract description 23
- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 230000002159 abnormal effect Effects 0.000 claims abstract description 54
- 238000000034 method Methods 0.000 claims abstract description 33
- 238000004364 calculation method Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 230000005284 excitation Effects 0.000 claims description 15
- 238000003860 storage Methods 0.000 claims description 14
- 230000015654 memory Effects 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 2
- 238000011022 operating instruction Methods 0.000 claims 2
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 11
- 238000004590 computer program Methods 0.000 description 10
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- 238000004891 communication Methods 0.000 description 4
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- 230000008569 process Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
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- 230000009471 action Effects 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/14—Estimation or adaptation of machine parameters, e.g. flux, current or voltage
- H02P21/18—Estimation of position or speed
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
- H02P25/18—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
- H02P29/028—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the motor continuing operation despite the fault condition, e.g. eliminating, compensating for or remedying the fault
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/032—Preventing damage to the motor, e.g. setting individual current limits for different drive conditions
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The application relates to the technical field of metallurgy, and discloses a speed detection method, a speed detection device, speed detection equipment and a speed detection medium for a steelmaking converter. The method comprises the following steps: receiving a working instruction, sending a given speed and a current output by a main frequency converter to the main frequency converter according to the working instruction, obtaining exciting current feedback according to the current output by the main frequency converter and vector calculation of the main frequency converter, and obtaining a motor parameter and an internal fixed model of the main frequency converter through the main frequency converter to obtain a given exciting current; acquiring speed feedback detected by an encoder connected with the main frequency converter; judging whether the speed feedback is abnormal or not according to the output current, the exciting current given value, the exciting current feedback, the output torque, the speed given value and the speed feedback; and if the speed feedback is abnormal, sending an abnormal prompt. The method and the device can judge whether the feedback numerical value of the encoder is correct or not in advance, accurately and timely.
Description
Technical Field
The application relates to the technical field of metallurgy, in particular to a speed detection method, a speed detection device, speed detection equipment and speed detection media of a steelmaking converter.
Background
The steel converter has heavy load and changes constantly, the load direction also changes, the starting and the braking are frequent in the running process, the multi-speed switching is realized, and the time is short. The converter is driven by four identical frequency converters to run by identical motors, torque master-slave control is adopted, one master frequency converter corresponds to a master motor, the other slave frequency converter corresponds to a slave motor, two of the four frequency converters can be mutually master-slave, one is master (slave), and the other is slave (master). Only the master frequency converter receives the speed given by the PLC and the speed fed back by the encoder to form a speed closed loop, the slave frequency converter receives the torque of the master frequency converter as given torque to drive the slave motor to run, the torque closed loop is formed, and the speed of the slave frequency converter is changed along with the torque of the slave frequency converter. Under the condition, when the speed of the encoder of the main frequency converter is detected abnormally, the conventional method has the defects that the time for judging the abnormity of the encoder is still long, and the overshoot and the time during starting and stopping are required to be filtered, so that the alarm of the speed detection is delayed, the alarm is not timely and accurate, and the method is designed for quickly judging the abnormity of the speed detected by the encoder.
Disclosure of Invention
The application aims to provide a speed detection method, a speed detection device, equipment and a medium of a steelmaking converter, which improve the accuracy of the detection speed so as to avoid the accident that molten steel of the converter is poured out from a converter mouth.
Other features and advantages of the present application will be apparent from the following detailed description, or may be learned by practice of the application.
According to an aspect of an embodiment of the present application, there is provided a speed detection method for a steel converter, the steel converter including a master converter, and at least one slave converter connected to the master converter, the master converter and the at least one slave converter each having an encoder connected thereto, the slave converter receiving an output torque of the master converter, the method including: receiving a working instruction, sending a speed setting and a main frequency converter output current to the main frequency converter according to the working instruction, obtaining excitation current feedback according to the main frequency converter output current and the main frequency converter vector calculation, and obtaining a motor parameter and a main frequency converter internal fixed model through the main frequency converter to obtain the excitation current setting; acquiring speed feedback detected by an encoder connected with the main frequency converter; judging whether the speed feedback is abnormal or not according to the output current, the exciting current given value, the exciting current feedback, the output torque, the speed given value and the speed feedback; and if the speed feedback is abnormal, sending an abnormal prompt.
According to some embodiments of the present application, the steelmaking converter further comprises at least one of the at least one slave frequency converter switchably usable with the master frequency converter, the method further comprising: and if the speed feedback is abnormal, switching the master-slave relationship between the master frequency converter and the slave frequency converter.
According to some embodiments of the present application, after sending the speed specification to the main frequency converter according to the work instruction, the method further includes that the main frequency converter filters the speed specification to obtain a filtered speed specification; the determining whether the speed feedback is abnormal according to the output current, the exciting current given value, the exciting current feedback, the output torque, the speed given value and the speed feedback further comprises: and when the output current of the main frequency converter is within a first preset threshold value, acquiring a first absolute value of a difference value between the given exciting current and the feedback exciting current and acquiring a second absolute value of a difference value between the given filtered speed and the feedback speed, and if the first absolute value is greater than a second preset threshold value and the second absolute value is greater than a third preset threshold value, judging that the feedback speed is abnormal.
According to some embodiments of the present application, the first preset threshold is that the output current is greater than 0 and less than the rated current of the motor, the second preset threshold is 20%, and the third preset threshold is 3 Hz.
According to some embodiments of the present application, the determining whether the speed feedback is abnormal according to the output current, the field current setting, the field current feedback, the output torque, the speed setting, and the speed feedback, further comprises: if the speed is given as 0, the output current is 0, and the output torque is 0, the speed feedback is not 0, it is determined that the speed feedback is abnormal.
According to some embodiments of the present application, the steelmaking converter further includes a programmable controller connected to the main converter, and an intelligent display device connected to the programmable controller, wherein the programmable controller receives a work instruction and sends a speed setting to the main converter according to the work instruction; if the speed feedback is abnormal, the sending out an abnormal prompt comprises the following steps: and if the speed feedback is abnormal, controlling the intelligent display equipment to send an abnormal prompt.
According to an aspect of an embodiment of the present application, there is provided a speed detecting apparatus of a steel converter, including: the speed setting module is used for receiving a working instruction, sending a speed setting to the main frequency converter according to the working instruction, outputting current by the main frequency converter, performing vector calculation by the main frequency converter according to the output current of the main frequency converter to obtain excitation current feedback, and obtaining motor parameters and an internal fixed model of the main frequency converter through the main frequency converter to obtain the excitation current setting; the feedback acquisition module is used for acquiring the speed feedback detected by the encoder connected with the main frequency converter; the judging module is used for judging whether the speed feedback is abnormal or not according to the output current, the given exciting current, the feedback exciting current, the output torque, the given speed and the feedback speed; and the prompting module is used for sending out an abnormal prompt if the speed feedback is abnormal.
According to some embodiments of the present application, the steelmaking converter further comprises at least one of the at least one slave frequency converter switchably usable with the master frequency converter, the apparatus further comprising: and the switching module is used for switching the master-slave relation between the master frequency converter and the slave frequency converter if the speed feedback is abnormal.
According to an aspect of embodiments of the present application, there is provided a computer-readable medium having stored thereon a computer program which, when executed by a processor, implements a speed detection method as described in the above embodiments.
According to an aspect of an embodiment of the present application, there is provided an electronic device including: one or more processors; a memory for storing executable instructions of the processor, which when executed by the one or more processors, cause the one or more processors to implement the speed detection method as described in the embodiments above.
By the technical scheme of this application more than, compare with prior art, its beneficial effect that is showing lies in: whether the feedback numerical value of the encoder is correct or not is judged more accurately and timely in advance; when an alarm is detected, an alarm prompt message is sent, but the converter is not stopped, the two frequency converters are automatically controlled to switch the master converter and the slave converter, and after the master converter and the slave converter are switched, the converter cannot be out of control even if an encoder carried by the slave frequency converter fails, so that the phenomenon that the production is influenced by the failure of the encoder is avoided, and the accident that molten steel is poured out from a furnace mouth is avoided.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The above and other features and advantages of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
FIG. 1 shows a flow diagram according to an embodiment of the present application;
FIG. 2 shows a schematic diagram of a steel converter speed detection apparatus according to one embodiment of the present application;
FIG. 3 illustrates a schematic structural diagram of a computer system suitable for use in implementing the electronic device of an embodiment of the present application.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the subject matter of the present application can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the application.
The block diagrams shown in the figures are functional entities only and do not necessarily correspond to physically separate entities. I.e. these functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor means and/or microcontroller means.
The flowcharts shown in the figures are illustrative only and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
According to some embodiments, the present application provides a method for detecting a speed of a steel converter, the steel converter including a master converter, at least one slave converter connected to the master converter, an encoder connected to each of the master converter and the at least one slave converter, the slave converter receiving an output torque of the master converter, the method including: step 101, receiving a working instruction, sending a given speed and a current output by a main frequency converter to the main frequency converter according to the working instruction, carrying out vector calculation on the main frequency converter according to the current output by the main frequency converter to obtain an excitation current feedback, and obtaining a motor parameter and an internal fixed model of the main frequency converter through the main frequency converter to obtain an excitation current given value; 102, acquiring speed feedback detected by an encoder connected with the main frequency converter; 103, judging whether the speed feedback is abnormal or not according to the output current, the given exciting current, the feedback of the exciting current, the output torque, the given speed and the speed feedback; and 104, if the speed feedback is abnormal, sending an abnormal prompt.
Based on the embodiment on the market, the steelmaking converter further comprises a programmable controller connected with the main frequency converter and the slave frequency converters, the programmable controller sends speed setting to the main frequency converter according to a working instruction, the main frequency converter carries out vector calculation according to the output current of the main frequency converter to obtain the feedback of exciting current, the exciting current setting is obtained by obtaining motor parameters and an internal fixed model of the main frequency converter through the main frequency converter, the main frequency converter transmits output torque to the other three slave frequency converters after receiving the starting and speed setting commands of the programmable controller, and each frequency converter excites the corresponding motor. The programmable controller obtains the speed feedback detected by the encoder connected with the main frequency converter and obtains the excitation current feedback. And the programmable controller judges whether the speed feedback is abnormal according to the output current, the given exciting current, the feedback exciting current, the output torque, the given speed and the speed feedback. The determination method comprises the following steps:
after sending the speed specification to the main frequency converter according to the working instruction, the main frequency converter further includes that the speed specification is filtered by the main frequency converter to obtain a filtered speed specification, and in some embodiments, the speed specification does not need to be filtered, so in the following description, the filtered speed specification may be the filtered speed specification, and the speed specification may also be the speed specification.
The following is described in terms of a filtered velocity set:
and when the output current of the main frequency converter is within a first preset threshold value, acquiring a first absolute value of a difference value between the given exciting current and the feedback exciting current and acquiring a second absolute value of a difference value between the given filtered speed and the feedback speed, and if the first absolute value is greater than a second preset threshold value and the second absolute value is greater than a third preset threshold value, judging that the feedback speed is abnormal. The first preset threshold is a current value of normal operation of the motor, namely, the output current is larger than 0 and smaller than the rated current of the motor, the second preset threshold is 20%, the second preset threshold can be slightly larger or slightly smaller, according to actual tests, as long as the value is below the rated current, the smaller the value is, the faster the alarm is, the third preset threshold is 3Hz, and the third preset threshold is a threshold set for the speed of closing the band-type brake.
If the speed is given as 0, the output current is 0, and the output torque is 0, the speed feedback is not 0, it is determined that the speed feedback is abnormal.
The intelligent display device is connected with the programmable controller, and if the speed feedback is abnormal, the programmable controller controls the intelligent display device to send an abnormal prompt.
In some embodiments, the programmable controller adopts a PLC controller, and the intelligent display device adopts winc upper monitoring. The method and the device can judge whether the feedback numerical value of the encoder is correct or not in advance, accurately and timely.
According to some embodiments, the steelmaking converter further comprises at least one of the at least one slave frequency converter switchably usable with the master frequency converter, the method further comprising: and if the speed feedback is abnormal, switching the master-slave relationship between the master frequency converter and the slave frequency converter.
Based on the embodiments on the market, the system comprises a frequency converter No. 1 to 4, an encoder No. 1 to 4 and a motor No. 1 to 4. Wherein, speed encoder No. 1 to 4 detects the speed feedback of motor No. 1 to 4 respectively, conveys respectively to the converter No. 1 to 4. The No. 1 to No. 4 motors are power driving equipment for converter rocking. The frequency converter No. 1 is a main frequency converter, the main frequency converter receives the speed setting of the programmable controller, start and stop commands, and controls the work of the motor No. 1, the frequency converter No. 2, the frequency converter No. 3 and the frequency converter No. 4 are slave frequency converters, the motor No. 2 corresponding to the torque control of the main frequency converter No. 1, the motor No. 3 and the motor No. 4 work, in the frequency converters from 1 to 4, the frequency converters No. 1 and 3 are master-slave frequency converters, namely, if one of the frequency converters is master, the other is slave, the frequency converters No. 2 and 4 are slave frequency converters, when the speed feedback is abnormal, the programmable controller switches the master-slave relation between the main frequency converter No. 1 and the slave frequency converter No. 3, after switching, the frequency converter No. 3 is the main frequency converter, and the frequency converter No. 1 is the slave frequency converter. Through a master-slave switching mode, when an alarm is detected, alarm prompt information is sent out, but the converter is not stopped, the two frequency converters are automatically controlled to switch the master converter and the slave converter, and after the master converter and the slave converter are switched, the converter cannot be out of control even if an encoder carried by the slave frequency converter fails, so that the phenomenon that the production is influenced by the failure of the encoder is avoided, and the accident that molten steel is poured out from a furnace mouth is avoided.
In some embodiments, the frequency converter 1 is used as a main frequency converter, the motor 1 is used as a main motor, and the encoder 1 is used as a main encoder, which are respectively referred to as the frequency converter, the motor and the encoder below.
After receiving a starting and speed giving command of the PLC, the frequency converter firstly excites the motor, and after excitation is finished, the speed given by the PLC passes through a ramp function generator of the frequency converter and the speed given after filtering is recorded as f 1. When the speed feedback of the encoder has problems, the exciting current of the vector control system of the frequency converter can vibrate, and the output current can increase but has process changes. Therefore, the encoder abnormality is quickly determined from the excitation current, the output current, the encoder speed feedback f2, and the filtered speed f 1.
When the output current of the frequency converter is more than 0 and less than 95 percent of the rated current of the motor (the daily maximum load rate is less than 80 percent, the operation of the motor is ensured not to exceed the rated current, the value can also be 98 percent), the absolute value of the difference value between the given exciting current and the feedback exciting current is judged, the judgment is continued when the result is more than 20 percent, and when the absolute value of the subtraction of the given speed f1 and the feedback speed f2 of the encoder is more than 3Hz, the encoder is reported to detect the fault. The minimum speed of the converter control system is 5Hz, when the speed is set to be removed and the speed is reduced to 3Hz, the band-type brake is closed, so the maximum value of the absolute value after the f1 is subtracted from the f2 is set to be 3Hz, and the value is required to be higher than or consistent with the speed when the band-type brake is closed.
Embodiments of the apparatus of the present application are described below, which may be used to perform the method for detecting the speed of a steelmaking converter of the above-described embodiments of the present application.
FIG. 2 illustrates a block diagram of a speed sensing device 200 for a steelmaking converter according to one embodiment of the present application, where the speed sensing device 200 for a steelmaking converter includes, in accordance with certain embodiments: the steelmaking converter comprises a main frequency converter and at least one slave frequency converter connected with the main frequency converter, wherein the main frequency converter and the at least one slave frequency converter are both connected with an encoder, the slave frequency converter receives the output torque of the main frequency converter, and the device comprises: the speed setting module 201 is used for receiving a working instruction, sending a speed setting to the main frequency converter according to the working instruction, outputting current by the main frequency converter, performing vector calculation by the main frequency converter according to the output current of the main frequency converter to obtain excitation current feedback, and obtaining a motor parameter and an internal fixed model of the main frequency converter through the main frequency converter to obtain an excitation current setting; a feedback obtaining module 202, configured to obtain a speed feedback detected by an encoder connected to the main frequency converter; a determination module 203, configured to determine whether the speed feedback is abnormal according to the output current, the excitation current setting, the excitation current feedback, the output torque, the speed setting, and the speed feedback; and the prompt module 204 is configured to send an exception prompt if the speed feedback is abnormal.
Based on the embodiment on the market, the steelmaking converter further comprises a programmable controller connected with the main frequency converter and the slave frequency converters, the programmable controller sends speed setting to the main frequency converter according to a working instruction, the feedback of exciting current is obtained through vector calculation of the main frequency converter according to output current of the main frequency converter, the exciting current setting is obtained through acquisition of motor parameters and an internal fixed model of the main frequency converter by the main frequency converter, the main frequency converter transmits output torque to the other three slave frequency converters after receiving starting and speed setting commands of the programmable controller, and each frequency converter excites the corresponding motor. The programmable controller obtains a speed feedback detected by an encoder connected with the main frequency converter and obtains an exciting current feedback. And the programmable controller judges whether the speed feedback is abnormal according to the output current, the given exciting current, the feedback exciting current, the output torque, the given speed and the speed feedback. The determination method comprises the following steps:
after sending the speed specification to the main frequency converter according to the working instruction, the main frequency converter further includes that the speed specification is filtered by the main frequency converter to obtain a filtered speed specification, and in some embodiments, the speed specification does not need to be filtered, so in the following description, the filtered speed specification may be the filtered speed specification, and the speed specification may also be the speed specification.
The following is described in terms of a filtered velocity set:
and when the output current of the main frequency converter is within a first preset threshold value, acquiring a first absolute value of a difference value between the given exciting current and the feedback exciting current and acquiring a second absolute value of a difference value between the given filtered speed and the feedback speed, and if the first absolute value is greater than a second preset threshold value and the second absolute value is greater than a third preset threshold value, judging that the feedback speed is abnormal. The first preset threshold is a current value of normal operation of the motor, namely, the output current is larger than 0 and smaller than the rated current of the motor, the second preset threshold is 20%, the second preset threshold can be slightly larger or slightly smaller, according to actual tests, as long as the value is below the rated current, the smaller the value is, the faster the alarm is, the third preset threshold is 3Hz, and the third preset threshold is a threshold set for the speed of closing the band-type brake.
If the speed is given as 0, the output current is 0, and the output torque is 0, the speed feedback is not 0, it is determined that the speed feedback is abnormal.
The intelligent display device is connected with the programmable controller, and if the speed feedback is abnormal, the programmable controller controls the intelligent display device to send an abnormal prompt.
In some embodiments, the programmable controller adopts a PLC controller, and the intelligent display device adopts winc upper monitoring. The method and the device can judge whether the feedback numerical value of the encoder is correct or not in advance, accurately and timely.
According to some embodiments, the steelmaking converter further comprises at least one of the at least one slave frequency converter being switchable in use with the master frequency converter, the apparatus further comprising: and the switching module is used for switching the master-slave relation between the master frequency converter and the slave frequency converter if the speed feedback is abnormal.
Based on the above embodiment, including 1 to 4 converters, 1 to 4 encoders and 1 to 4 motors. The speed encoders from 1 to 4 detect the speed feedback of the motors from 1 to 4 respectively and transmit the speed feedback to the frequency converters from 1 to 4 respectively. The No. 1 to No. 4 motors are power driving equipment for converter rocking. The frequency converter No. 1 is a main frequency converter, the main frequency converter receives the speed setting of the programmable controller, start and stop commands, and controls the work of the motor No. 1, the frequency converter No. 2, the frequency converter No. 3 and the frequency converter No. 4 are slave frequency converters, the motor No. 2 corresponding to the torque control of the main frequency converter No. 1, the motor No. 3 and the motor No. 4 work, in the frequency converters from 1 to 4, the frequency converters No. 1 and 3 are master-slave frequency converters, namely, if one of the frequency converters is master, the other is slave, the frequency converters No. 2 and 4 are slave frequency converters, when the speed feedback is abnormal, the programmable controller switches the master-slave relation between the main frequency converter No. 1 and the slave frequency converter No. 3, after switching, the frequency converter No. 3 is the main frequency converter, and the frequency converter No. 1 is the slave frequency converter. And after the master converter and the slave converter are switched, the encoder carried by the slave converter cannot cause the converter out of control even if the encoder fails, so that the production is prevented from being influenced by the failure of the encoder, and the accident that molten steel is poured out from a furnace mouth is avoided.
FIG. 3 illustrates a schematic structural diagram of a computer system suitable for use in implementing the electronic device of an embodiment of the present application.
It should be noted that the computer system 300 of the electronic device shown in fig. 3 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present application.
As shown in fig. 3, the computer system 300 includes a Central Processing Unit (CPU)301, which can execute various appropriate actions and processes, such as executing the speed detection method of the steel converter described in the above embodiment, according to a program stored in a Read-Only Memory (ROM) 302 or a program loaded from a storage portion 308 into a Random Access Memory (RAM) 303. In the RAM303, various programs and data necessary for system operation are also stored. The CPU301, ROM302, and RAM303 are connected to each other via a bus 304. An Input/Output (I/O) interface 305 is also connected to bus 304.
The following components are connected to the I/O interface 305: an input portion 306 including a keyboard, a mouse, and the like; an output section 307 including a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, a speaker, and the like; a storage section 308 including a hard disk and the like; and a communication section 309 including a Network interface card such as a LAN (Local Area Network) card, a modem, or the like. The communication section 309 performs communication processing via a network such as the internet. A drive 310 is also connected to the I/O interface 305 as needed. A removable medium 311 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 310 as necessary, so that a computer program read out therefrom is mounted into the storage section 308 as necessary.
In particular, according to embodiments of the application, the processes described above with reference to the flow diagrams may be implemented as computer software programs. For example, embodiments of the present application include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising program code for performing the method illustrated by the flow chart. In such an embodiment, the computer program may be downloaded and installed from a network through the communication section 309, and/or installed from the removable medium 311. When the computer program is executed by a Central Processing Unit (CPU)301, various functions defined in the system of the present application are executed.
It should be noted that the computer readable medium shown in the embodiments of the present application may be a computer readable signal medium or a computer readable storage medium or any combination of the two. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of the computer readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a Read-Only Memory (ROM), an Erasable Programmable Read-Only Memory (EPROM), a flash Memory, an optical fiber, a portable Compact Disc Read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present application, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In this application, however, a computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the foregoing.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. Each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The modules described in the embodiments of the present application may be implemented by software, or may be implemented by hardware, and the described modules may also be disposed in a processor. Wherein the names of the modules do not in some cases constitute a limitation of the module itself.
As another aspect, the present application also provides a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the electronic device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the electronic device executes the speed detection method of the steelmaking converter described in the above embodiment.
As another aspect, the present application also provides a computer-readable medium, which may be contained in the electronic device described in the above embodiments; or may exist separately without being assembled into the electronic device. The computer readable medium carries one or more programs which, when executed by the electronic device, cause the electronic device to implement the method for detecting the speed of the steelmaking converter described in the above embodiments.
It should be noted that although in the above detailed description several modules or units of the device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit, according to embodiments of the application. Conversely, the features and functions of one module or unit described above may be further divided into embodiments by a plurality of modules or units.
Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein may be implemented by software, and may also be implemented by software in combination with necessary hardware. Therefore, the technical solution according to the embodiment of the present application may be embodied in the form of a software product, where the software product may be stored in a non-volatile storage medium (which may be a CD-ROM, a usb disk, a removable hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which may be a personal computer, a server, a touch terminal, or a network device, etc.) to execute the speed detection method for a steel converter in the foregoing embodiment.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. A method for detecting a speed of a steel converter, wherein the steel converter includes a master converter and at least one slave converter connected to the master converter, an encoder is connected to each of the master converter and the at least one slave converter, and the slave converter receives an output torque of the master converter, the method comprising:
receiving a working instruction, sending a given speed and a current output by a main frequency converter to the main frequency converter according to the working instruction, obtaining exciting current feedback according to the current output by the main frequency converter and vector calculation of the main frequency converter, and obtaining a motor parameter and an internal fixed model of the main frequency converter through the main frequency converter to obtain a given exciting current;
acquiring speed feedback detected by an encoder connected with the main frequency converter;
judging whether the speed feedback is abnormal or not according to the output current, the exciting current given value, the exciting current feedback, the output torque, the speed given value and the speed feedback;
and if the speed feedback is abnormal, sending an abnormal prompt.
2. The method of claim 1, wherein the steelmaking converter further comprises at least one of the at least one slave frequency converter being switchable to use with the master frequency converter, the method further comprising:
and if the speed feedback is abnormal, switching the master-slave relationship between the master frequency converter and the slave frequency converter.
3. The method of claim 1, wherein after said sending a speed specification to said primary transducer according to said operating command, further comprising, said primary transducer filtering said speed specification to obtain a filtered speed specification;
the determining whether the speed feedback is abnormal according to the output current, the exciting current given value, the exciting current feedback, the output torque, the speed given value and the speed feedback further comprises:
and when the output current of the main frequency converter is within a first preset threshold value, acquiring a first absolute value of a difference value between the given exciting current and the feedback exciting current and acquiring a second absolute value of a difference value between the given filtered speed and the feedback speed, and if the first absolute value is greater than a second preset threshold value and the second absolute value is greater than a third preset threshold value, judging that the feedback speed is abnormal.
4. The method according to claim 3, wherein the first preset threshold is an output current greater than 0 and less than a rated current of the motor, the second preset threshold is 20%, and the third preset threshold is a speed setting threshold for closing the band-type brake.
5. The method of claim 1, wherein said determining whether said speed feedback is abnormal based on said output current, field current set, field current feedback, output torque, speed set, and speed feedback, further comprises:
if the speed is given as 0, the output current is 0, and the output torque is 0, the speed feedback is not 0, it is determined that the speed feedback is abnormal.
6. The method of claim 1, wherein the steelmaking converter further comprises a programmable controller connected to the main converter and an intelligent display device connected to the programmable controller, wherein the programmable controller receives operating instructions and sends speed commands to the main converter according to the operating instructions;
if the speed feedback is abnormal, the sending out an abnormal prompt comprises the following steps:
and if the speed feedback is abnormal, controlling the intelligent display equipment to send an abnormal prompt.
7. A speed detection device of a steel converter is characterized in that the steel converter comprises a main frequency converter and at least one slave frequency converter connected with the main frequency converter, the main frequency converter and the at least one slave frequency converter are both connected with encoders, the slave frequency converter receives the output torque of the main frequency converter, and the device comprises:
the speed setting module is used for receiving a working instruction, sending a speed setting to the main frequency converter according to the working instruction, outputting current by the main frequency converter, performing vector calculation by the main frequency converter according to the output current of the main frequency converter to obtain excitation current feedback, and obtaining motor parameters and an internal fixed model of the main frequency converter through the main frequency converter to obtain the excitation current setting;
the feedback acquisition module is used for acquiring the speed feedback detected by the encoder connected with the main frequency converter;
the judging module is used for judging whether the speed feedback is abnormal or not according to the output current, the given exciting current, the feedback exciting current, the output torque, the given speed and the feedback speed;
and the prompting module is used for sending out an abnormal prompt if the speed feedback is abnormal.
8. The apparatus of claim 7, wherein the steelmaking converter further comprises at least one of the at least one slave frequency converter being switchable to use with the master frequency converter, the apparatus further comprising:
and the switching module is used for switching the master-slave relation between the master frequency converter and the slave frequency converter if the speed feedback is abnormal.
9. An electronic device, comprising one or more processors and one or more memories having at least one program code stored therein, the at least one program code being loaded into and executed by the one or more processors to perform operations performed by the method of detecting speed of a steelmaking converter according to any one of claims 1 to 6.
10. A computer-readable storage medium having at least one program code stored therein, the at least one program code being loaded into and executed by a processor to perform operations performed by the method of detecting a speed of a steelmaking converter as claimed in any one of claims 1 to 6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210504755.XA CN114884430A (en) | 2022-05-10 | 2022-05-10 | Speed detection method, device, equipment and medium for steelmaking converter |
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| CN202210504755.XA CN114884430A (en) | 2022-05-10 | 2022-05-10 | Speed detection method, device, equipment and medium for steelmaking converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117767829A (en) * | 2023-12-25 | 2024-03-26 | 赛力斯汽车有限公司 | Closed-loop control method and device for motor rotation speed, electronic equipment and storage medium |
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- 2022-05-10 CN CN202210504755.XA patent/CN114884430A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117767829A (en) * | 2023-12-25 | 2024-03-26 | 赛力斯汽车有限公司 | Closed-loop control method and device for motor rotation speed, electronic equipment and storage medium |
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