CN112615833A - Multi-unit series connection frequency converter unit data acquisition cloud-up method - Google Patents
Multi-unit series connection frequency converter unit data acquisition cloud-up method Download PDFInfo
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- CN112615833A CN112615833A CN202011445851.9A CN202011445851A CN112615833A CN 112615833 A CN112615833 A CN 112615833A CN 202011445851 A CN202011445851 A CN 202011445851A CN 112615833 A CN112615833 A CN 112615833A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/08—Protocols for interworking; Protocol conversion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
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Abstract
The invention discloses a multi-unit series connection frequency converter unit data acquisition cloud-up method, which belongs to the field of frequency converter data transmission and comprises the following steps: step S1, collecting the state data of the power unit group in the frequency converter and storing the data in an edge collecting box; step S2, reading the state data of each power unit stored in the edge capture box, and determining whether the state data changes: if the data is changed, go to step S3; if the data is not changed, returning to step S2; step S3, converting the status data; and step S4, uploading the converted state data to a cloud server side, and returning to step S2. The technical scheme of the invention has the beneficial effects that: the 4G internet of things is accessed, so that the operation data of each unit is uploaded to the cloud, the stored massive data can be used for carrying out fault early warning and diagnosis, a more convenient equipment monitoring and management method is provided for clients, and the safe and efficient operation of equipment is ensured.
Description
Technical Field
The invention relates to the field of data transmission of frequency converters, in particular to a multi-unit series connection frequency converter unit data acquisition cloud-up method.
Background
The high-voltage frequency converter is a main means for realizing the frequency conversion and speed regulation of the high-voltage high-power motor, and the power unit series topology has obvious advantages in the aspects of system complexity, stability, speed regulation range, influence on motor temperature rise, harmonic pollution to a power grid and the like, so that the topology mode becomes the mainstream topology mode in the high-voltage frequency converter. As shown in fig. 1, the schematic diagram of a multi-unit series-connected frequency converter mainly includes a main control board and a plurality of groups of power units with three-phase output, the power units with in-phase output are connected in series, and the main control board receives status data of each power unit.
Because the high-voltage frequency converter connected in series with the multiple units can not be directly connected with the Internet, only the working state data, the fault tracking data and other data of each unit can be stored locally, when a fault occurs, service personnel is usually required to go to the local for data acquisition, because the abilities of each person are different, if the service personnel going to the site can not solve the fault, the fault data also needs to be fed back to the company and then the company carries out joint analysis by a plurality of departments of service, development, design, manufacture and the like, the failure reason is confirmed and then can be repaired, the travel time is long (especially users in overseas or remote areas), the failure can not be processed in time, the problem solving efficiency is low, the user experience is poor, the cost is high, therefore, in order to solve the above problems, it is urgently needed to design a method for collecting data of a frequency converter unit with multiple units connected in series to meet the requirement of practical use.
Disclosure of Invention
The invention aims to provide a multi-unit series connection frequency converter unit data acquisition and cloud-up method, which is accessed to a 4G internet of things gateway to realize uploading operation data of each unit to a cloud server side, so that fault early warning and diagnosis can be realized by using a large amount of stored data, a client can conveniently monitor and manage equipment, and the safe and efficient operation of the equipment is ensured.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
the invention provides a multi-unit series connection frequency converter unit data acquisition cloud-up method which is characterized by comprising the following steps:
step S1, collecting the state data of the power unit group in the frequency converter and storing the state data in an edge collecting box, wherein the power unit group comprises a plurality of groups of power units with three-phase output, and each phase output corresponds to a plurality of power units which are connected in series;
step S2, reading the state data of each power cell stored in the edge capture box, and determining whether the state data changes:
if the data is changed, go to step S3;
if the data is not changed, returning to the step S2;
step S3, converting the status data;
and step S4, uploading the converted state data to a cloud server side, and returning to the step S2.
Preferably, in step S1, the method for acquiring and storing the state data of the power unit group in the frequency converter in the edge acquisition box includes the following steps:
step S11, synchronously acquiring and storing the state data of each power unit in the power unit group through a main control board;
and step S12, the edge collecting box collects the state data in the main control board according to a preset time and stores the state data.
Preferably, in step S11, the step of synchronously acquiring, by the main control board, status data of the power unit group in the frequency converter includes the following steps:
step S111, sending a data acquisition synchronization signal to each corresponding power unit according to a preset parameter;
step S112, determining whether each of the power units receiving the data acquisition synchronization signal is synchronized:
if yes, synchronously acquiring the state data of each corresponding power unit;
if not, the process returns to the step S111.
Preferably, in step S12, according to the preset time, the edge capture box reads the stored status data from the main control board, writes the read status data into the current queue, and increments the tail of the current queue by one.
Preferably, the main control board communicates with each of the power units in a polling manner.
Preferably, the main control board and each power unit are connected through optical fibers.
Preferably, in step S2, reading the status data stored in the edge capture box specifically includes the following steps:
step S21, judging whether the edge collecting box receives a reading request of an Internet of things gateway;
step S22, if a read request from the internet of things gateway is received, determining whether the head and the tail of the current queue are the same:
if yes, returning to the step S11;
if not, reading out the state data of the current queue, and adding one to the head of the current queue;
and step S23, sending the read state data to the Internet of things gateway.
Preferably, in step S3, the internet of things gateway performs data conversion and protocol conversion on the read status data.
Preferably, the internet of things gateway performs data transmission with the edge capture box through a port.
Preferably, the internet of things gateway supports a Modbus TCP protocol.
The technical scheme of the invention has the beneficial effects that:
according to the invention, the 4G internet of things gateway is accessed, so that the operation data of each unit is uploaded to the cloud server, therefore, the stored massive data can be used for carrying out fault early warning and diagnosis, a more convenient equipment monitoring and management method is provided for clients, and the safe and efficient operation of equipment is ensured.
Drawings
FIG. 1 is a schematic diagram of a prior art frequency converter unit with multiple units connected in series;
FIG. 2 is a block diagram of a data acquisition and cloud-up method for a multi-unit series-connected frequency converter unit according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of an embodiment of a method for data acquisition and cloud-up of a multi-unit series-connected frequency converter unit according to the present invention;
FIG. 4 is a flowchart illustrating an embodiment of step S1 according to the present invention;
FIG. 5 is a flowchart illustrating an embodiment of step S11 according to the present invention;
fig. 6 is a flowchart illustrating an embodiment of step S2 in the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
The invention provides a multi-unit series connection frequency converter unit data acquisition cloud-up method, which belongs to the field of frequency converter data transmission and comprises the following steps as shown in fig. 2 and 3:
step S1, collecting the state data of the power unit group in the frequency converter and storing the data in an edge collecting box, wherein the power unit group comprises a plurality of groups of power units with three-phase output, and each phase output corresponds to a plurality of power units which are connected in series;
step S2, reading the status data of each power unit 12 stored in the edge capture box 2, and determining whether the status data changes:
if the data is changed, go to step S3;
if the data is not changed, returning to step S2;
step S3, converting the status data;
step S4, the converted state data is uploaded to the cloud server 4, and the process returns to step S2.
Specifically, in this embodiment, the present invention includes a frequency converter 1, an edge collecting box 2, and a cloud server terminal 4; the preferred frequency converter 1 is a high-voltage frequency converter 1, the high-voltage frequency converter 1 includes a plurality of sets of power units 12 outputting three phases, specifically, the first phase output is a U phase, the second phase output is a V phase, the third phase output is a W phase, each set of three-phase outputs are arranged side by side, the power units 12(U1, U2 … Un) located at the leftmost side respectively constitute the U phases of the plurality of sets of three-phase outputs, the power units 12(V1, V2 … Vn) located at the middle respectively constitute the V phases of the plurality of sets of three-phase outputs, the power units 12(W1, W2 … Wn) located at the rightmost side respectively constitute the W phases of the plurality of sets of three-phase outputs, and the power units 12 outputting the same phase are connected in series.
The edge acquisition box 2 is in communication connection with the high-voltage frequency converter 1 through an existing ModBus RTU communication interface of the high-voltage frequency converter 1, so that data acquisition and transmission of the high-voltage frequency converter 1 are realized, the problem of insufficient communication ports of a high-voltage frequency converter 1 system is solved through the arrangement of the edge acquisition box 2, and meanwhile, the edge acquisition box 2 can acquire state data of each power unit 12 in the high-voltage frequency converter 1 at regular time, store the state data in a memory of the edge acquisition box and wait for data access; preferably, the cloud server 4 accesses the edge collection box 2 through the 4G internet of things gateway 3, when the 4G internet of things gateway 3 is established to read data, the edge collection box 2 takes out the stored state data from the memory and sends the state data to the 4G internet of things gateway 3, the 4G internet of things gateway 3 performs data conversion and protocol conversion on the state data of each power unit 12 of the frequency converter 1, the originally collected analog state data is converted into digital data, and then the converted state metadata is uploaded to the cloud server 4 through a private protocol.
In a preferred embodiment, in step S1, the status data of the power unit group in the frequency converter 1 is collected and stored in the edge collecting box 2, as shown in fig. 4, which specifically includes the following steps:
step S11, synchronously acquiring and storing the status data of each power unit 12 in the power unit group through a main control board 11;
in step S12, the edge capture box 2 captures and stores the status data in the main control board 11 according to a preset time.
Specifically, the high-voltage frequency converter 1 further includes a main control board 11, and the main control board 11 is connected to the power unit group and is configured to synchronously acquire state data of each power unit 12; preferably, the main control board 11 is communicatively connected to each power unit 12 through an optical fiber.
In a preferred embodiment, in step S11, the main control board 11 synchronously acquires the status data of the power unit groups in the frequency converter 1, as shown in fig. 5, specifically includes the following steps:
step S111, sending a data acquisition synchronization signal to each corresponding power unit 12 according to a preset parameter;
step S112, determining whether each power unit 12 receiving the data acquisition synchronization signal is synchronized:
if yes, synchronously acquiring the state data of each corresponding power unit 12;
if not, the process returns to step S111.
Specifically, before collecting the status data of each power unit 12, the main control board 11 outputs a synchronization signal to each power unit 12, and receives a signal feedback from each power unit 12 to ensure the status data of each unit collected in the same time sequence, and preferably, the main control board 11 controls which phase of the output status data of the power unit 12 needs to be read by configuring a setting parameter, where the setting parameter is preset.
The specific setting parameters are as the following table one:
table-setting parameter table
The main control board 11 may configure corresponding setting parameters to read data to be collected each time according to the setting parameter table, or may automatically read data of the power unit 12 to be collected at a preset time interval according to the configured parameters, where the collected data may be temporarily stored in the memory of the main control board 11 of the frequency converter 1, and wait for the edge collection box 2 to be read at regular time, and preferably, the access between the edge collection box 2 and the main control board 11 is performed through a Modbus RTU protocol.
In a preferred embodiment, in step S12, according to a preset time, the edge capture box 2 reads the stored status data from the main control board 11, writes the read status data into the current queue, and increments the tail of the current queue by one.
Specifically, the edge collection box 2 reads the state data in the memory of the main control board 11 at regular time, after the data is read, the read data is written into the tail of the current queue, the enqueue position of the tail of the current queue is automatically increased by one, at this time, the data in the edge collection box 2 changes, and when the data in the edge collection box 2 is read by the subsequent 4G internet of things gateway 3, the data is used as a basis for judging whether the state data changes.
In a preferred embodiment, the main control board 11 communicates with each power unit 12 through a polling method, and the main control board 11 periodically and respectively sends out inquiries to each power unit 12, for example, sequentially sends out synchronous signal inquiries to the power units 12 of the same phase output, so as to acquire status data of each power unit 12 of the phase output, and after the acquisition, inquire each power unit 12 of the next phase, and then repeat the process.
In a preferred embodiment, in step S2, the reading of the status data stored in the edge capture box 2 specifically includes the following steps, as shown in fig. 6:
step S21, judging whether the edge collecting box 2 receives a reading request of an internet of things gateway 3;
step S22, if a read request from the internet of things gateway 3 is received, it is determined whether the head and the tail of the current queue are the same:
if yes, returning to step S21;
if not, reading out the state data of the current queue, and adding one to the head of the current queue;
step S23, sending the read status data to the internet of things gateway 3.
In a preferred embodiment, in step S3, the internet gateway 3 performs data conversion and protocol conversion on the read status data.
In a preferred embodiment, the gateway 3 performs data transmission with the edge capture box 2 through a port.
Specifically, the 4G internet of things gateway 3 is connected with the port of the edge acquisition box 2, and the port between the 4G internet of things gateway 3 gateway and the edge acquisition box 2 transmits data through the Modbus TCP protocol.
The technical scheme of the invention has the beneficial effects that:
according to the invention, the 4G internet of things gateway is accessed, so that the operation data of each unit is uploaded to the cloud server, therefore, the stored massive data can be used for carrying out fault early warning and diagnosis, a more convenient equipment monitoring and management method is provided for clients, and the safe and efficient operation of equipment is ensured.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. A multi-unit series connection frequency converter unit data acquisition cloud-up method is characterized by comprising the following steps:
step S1, collecting the state data of the power unit group in the frequency converter and storing the state data in an edge collecting box, wherein the power unit group comprises a plurality of groups of power units with three-phase output, and each phase output corresponds to a plurality of power units which are connected in series;
step S2, reading the state data of each power cell stored in the edge capture box, and determining whether the state data changes:
if the data is changed, go to step S3;
if the data is not changed, returning to the step S2;
step S3, converting the status data;
and step S4, uploading the converted state data to a cloud server side, and returning to the step S2.
2. The method according to claim 1, wherein in step S1, the status data of the power unit groups in the frequency converter are collected and stored in the edge collection box, and the method specifically includes the following steps:
step S11, synchronously acquiring and storing the state data of each power unit in the power unit group through a main control board;
and step S12, the edge collecting box collects the state data in the main control board according to a preset time and stores the state data.
3. The method according to claim 2, wherein in step S11, the main control board synchronously acquires status data of power unit groups in the frequency converter, and specifically includes the following steps:
step S111, sending a data acquisition synchronization signal to each corresponding power unit according to a preset parameter;
step S112, determining whether each of the power units receiving the data acquisition synchronization signal is synchronized:
if yes, synchronously acquiring the state data of each corresponding power unit;
if not, the process returns to the step S111.
4. The method according to claim 2, wherein in step S12, according to the preset time, the edge capture box reads the stored status data from the main control board, writes the read status data into a current queue, and increments the tail of the current queue by one.
5. The method as claimed in claim 2, wherein the main control board communicates with each of the power units in a polling manner.
6. The method as claimed in claim 2, wherein the main control board and each power unit are connected by optical fiber.
7. The method according to claim 1, wherein in step S2, reading the state data stored in the edge capture box comprises the following steps:
step S21, judging whether the edge collecting box receives a reading request of an Internet of things gateway;
step S22, if a read request from the internet of things gateway is received, determining whether the head and the tail of the current queue are the same:
if yes, returning to the step S21;
if not, reading out the state data of the current queue, and adding one to the head of the current queue;
and step S23, sending the read state data to the Internet of things gateway.
8. The method as claimed in claim 7, wherein in step S3, the gateway performs data conversion and protocol conversion on the status data read out.
9. The method of claim 7, wherein the gateway performs data transmission with the edge capture box through a port.
10. The method for data collection and cloud collection of the frequency converter units connected in series by the multiple units as claimed in claim 7, wherein the internet of things gateway supports a Modbus TCP protocol.
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2020
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20140129688A1 (en) * | 2012-11-02 | 2014-05-08 | Rockwell Automation Technologies, Inc. | Cloud based drive monitoring solution |
| CN106199252A (en) * | 2016-06-29 | 2016-12-07 | 武汉广源动力科技有限公司 | A kind of high voltage transducer power unit remote failure diagnosis system |
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Application publication date: 20210406 |