CN108134837B

CN108134837B - Monitoring device for converter and converter

Info

Publication number: CN108134837B
Application number: CN201711431419.2A
Authority: CN
Inventors: 兰云海
Original assignee: Beijing Etechwin Electric Co Ltd
Current assignee: Beijing Etechwin Electric Co Ltd
Priority date: 2017-12-26
Filing date: 2017-12-26
Publication date: 2021-05-04
Anticipated expiration: 2037-12-26
Also published as: CN108134837A

Abstract

The invention provides a monitoring device for a current transformer and the current transformer, wherein the monitoring device can comprise: the system comprises a converter control module, a data interaction module electrically connected with the converter control module and a WEB service module electrically connected with the data interaction module, wherein the converter control module is used for collecting and storing converter data; the WEB service module is used for receiving user input from a browser communicated with the monitoring device, generating a monitoring message according to the received user input and sending the generated monitoring message to the data interaction module; the data interaction module is used for receiving the monitoring message and processing the stored converter data according to the received monitoring message. The data collecting and processing functions of the invention are realized by the monitoring device of the converter, and the monitoring operation of the user is realized by the browser separated from the monitoring device, thereby more flexibly and conveniently monitoring the converter, and reducing the development, test and maintenance cost of the monitoring software of the converter.

Description

Monitoring device for converter and converter

Technical Field

The invention relates to a converter technology, in particular to a monitoring device for a converter and the converter.

Background

With the development and progress of human society, conventional fossil energy has failed to satisfy the demand of people for energy due to non-regenerability and high pollutant emission. Therefore, new energy technologies such as photovoltaic and energy storage are increasingly paid more attention by people. The converter is an important component for energy conversion in a new energy system based on the new energy technology, and the operation state of the converter directly influences the stability and reliability of the new energy system. In practical operation, the state of the converter needs to be conveniently controlled and checked so as to perform operation monitoring and fault finding of the converter.

Currently, the monitoring of the converter is mainly implemented by a monitoring device (e.g., a monitoring device with a liquid crystal display) or by an upper computer running on a computer, wherein the control device or the computer is connected to the converter through an RS485 communication cable or an ethernet.

In the existing converter monitoring method, not only software at the converter end needs to be developed and maintained, but also software of an upper computer at the computer end or software at the monitoring device end needs to be developed and maintained, and corresponding software needs to be designed for different manufacturers aiming at any one of the converter, the control device and the upper computer, so that the monitoring cost of the converter is increased. In addition, in the current transformer monitoring method using the monitoring device, the monitoring device is separated from the current transformer, and therefore, it is costly to additionally provide the monitoring device in addition to the current transformer.

As described above, the prior art has the following drawbacks: first, support of specific hardware (e.g., a monitoring device with a liquid crystal screen) separate from the current transformer is required, which is costly; secondly, special software needs to be developed for monitoring devices or upper computers except the converter, and the development, the test and the maintenance of the special software consume cost.

Disclosure of Invention

Various aspects of the present invention may address at least the above-mentioned problems and/or disadvantages and provide at least the advantages below. In addition, the present invention may not solve the above-mentioned problems and/or disadvantages.

According to an aspect of the present invention, there is provided a monitoring apparatus for a current transformer, the monitoring apparatus may include: the system comprises a converter control module, a data interaction module electrically connected with the converter control module and a WEB service module electrically connected with the data interaction module, wherein the converter control module is used for collecting and storing converter data; the WEB service module is used for receiving user input from a browser communicated with the monitoring device, generating a monitoring message according to the received user input and sending the generated monitoring message to the data interaction module; and the data interaction module is used for receiving the monitoring message and processing the stored converter data according to the received monitoring message.

Optionally, the monitoring apparatus further includes a memory for storing the converter data, and when the user input is a telemetry request for reading data, the WEB service module includes: the first message generating unit is used for generating a monitoring message integrating the storage address of the data to be read in the memory and the function code corresponding to the telemetering request; the first message analysis unit is used for analyzing the read data from the response message; a response code generation unit for generating a response code into which the read data is integrated; the response unit is used for feeding back the response code generated by the response code generation unit to the browser, and the data interaction module comprises: the second message analysis unit is used for analyzing the storage address and the function code from the monitoring message; a data processing unit for reading data from the memory address of the memory; and a second message generation unit configured to generate a response message in which the read data is integrated.

Optionally, the monitoring device further includes a memory for storing the converter data, and when the user input is a remote control request for changing the data to a set value, the WEB service module includes: the first message generating unit is used for generating a monitoring message which integrates the storage address of the data to be changed in the memory, the set value and the function code corresponding to the remote control request; the first message analysis unit is used for analyzing a data processing result from the response message; a response code generation unit configured to generate a response code into which the data processing result is integrated; the response unit is used for feeding back the generated response code to the browser, and the data interaction module comprises: the second message analysis unit is used for analyzing the storage address, the set value and the function code from the monitoring message; a data processing unit for changing data at the storage address of the memory to a set value and generating a data processing result; and the second message generating unit is used for generating a response message integrated with the data processing result.

Optionally, the converter control module is further configured to read the stored converter data and control the output of the converter based on the read converter data.

Optionally, the converter control module is implemented by a digital signal processor.

Optionally, the WEB service module and the data interaction module are implemented by an ARM processor.

Optionally, the data interaction module is implemented by a MODBUS protocol stack.

Optionally, the WEB service module communicates with the data interaction module through a socket or a public gateway interface.

Optionally, the WEB service module communicates with the browser through a user interface.

According to another aspect of the present invention, a converter is provided, which may include an inverter system and the monitoring device described above.

The invention monitors the converter in a browser-server mode, so that the data collection and processing functions are realized by the converter body (for example, a monitoring device arranged in the converter), the monitoring operation of a user is realized by a browser separated from the converter, and the server on the converter (for example, a WEB service module of the monitoring device in the converter) can be accessed by a webpage browser on equipment such as a general computer or a mobile phone, so that the converter can be monitored flexibly and conveniently. The browser can be realized in an operating system of a general computer, so that extra hardware equipment special for monitoring the converter is avoided, development, test and maintenance of monitoring software outside the converter body are also avoided, and the cost is reduced.

The data interaction module can be realized through an MODBUS protocol stack on the basis of the existing functions of the converter so as to process the stored converter data, so that the invention can be realized more easily, and the cost of adopting new hardware and software is reduced. The server (for example, a WEB service module) interacting with the browser communicates with the MODBUS protocol stack through a Socket (Socket), so that the processing efficiency is improved.

Additional aspects and/or advantages of the present general inventive concept will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the general inventive concept.

Drawings

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. The embodiments are described below in order to explain the present invention by referring to the figures.

Fig. 1 shows a block diagram of a monitoring device for a converter according to an exemplary embodiment of the invention;

fig. 2 shows a block diagram of a current transformer according to an exemplary embodiment of the present invention;

fig. 3 shows a flowchart of a method for monitoring a converter by a browser according to an exemplary embodiment of the present invention.

Detailed Description

Hereinafter, exemplary embodiments of the inventive concept will be described in more detail with reference to the accompanying drawings.

Fig. 1 shows a block diagram of a monitoring device for a converter according to an exemplary embodiment of the present invention.

As shown in fig. 1, the monitoring apparatus 100 for a converter according to the present exemplary embodiment may include a converter control module 110, a data interaction module 120 electrically connected to the converter control module 110, and a WEB service module 130 electrically connected to the data interaction module 120.

The converter control module 110 is used to collect and store converter data. In this case, the monitoring device 100 may further include a memory (not shown) into which the converter control module 110 stores the converter data. The current transformer data may be collected by a sensor or the like for detecting the state of the current transformer, and then, the collected current transformer data is collected and stored. An example of the Memory may be a shared Random Access Memory (RAM).

The WEB service module 130 is configured to receive a user input from the browser 101 communicating with the monitoring apparatus 100, generate a monitoring message according to the received user input, and send the generated monitoring message to the data interaction module 120. The data interaction module 120 is configured to receive the monitoring packet, and process the stored converter data according to the received monitoring packet.

The converter control module 110 can perform read, write, and rewrite operations on the memory. The data interaction module 120 may also perform read, write, and rewrite operations on the memory. Therefore, the converter control module 110 and the data exchange module 120 exchange data through the memory.

The WEB service module 130 may provide page (or WEB page) code to the browser according to a request of the browser 101, so that the browser generates or updates a page according to the page code. The WEB service module 130 may be implemented by a HyperText Transfer Protocol (http) program. The page code of the WEB services module 130 may be implemented by one of: hypertext Preprocessor (PHP) Language, JAVA Language, C # Language, and Hypertext Markup Language (HTML). The page code of the WEB service module 130 may also include code written in the JAVASCRIPT language.

The browser 101 running on a general-purpose computer may communicate with the WEB service module 130 (for example, by Transmission Control Protocol (TCP) communication) to realize data interaction between the browser and the WEB service module 130. For example, the browser downloads page code from the WEB service module 130, which may include page code written in the HTML and JAVASCRIPT languages; the browser 101 sends a request message integrated with user input to the WEB service module 130; the WEB services module 222 listens to the 80 port for browser request messages and responds.

The WEB service module 130 can send a response code to the browser 101 in response to the user input and can return to the listening state after responding. The browser 101 may update the page displayed to the user according to the response code so as to display the data requested by the user or the corresponding processing result to the user.

By way of example, the WEB services module 130 may include: a first message generation unit (not shown), a first message parsing unit (not shown), a response code generation unit (not shown), and a response unit (not shown). The data interaction module 120 may include: a second message parsing unit (not shown), a data processing unit (not shown), and a second message generating unit (not shown).

Under the condition that user input is a telemetering request for reading data, a first message generation unit generates a monitoring message integrating a storage address of the data to be read in a memory and a function code corresponding to the telemetering request; the second message analysis unit analyzes the storage address and the function code from the monitoring message; the data processing unit reads data from the storage address of the memory; the second message generating unit generates a response message integrated with the read data; the first message analysis unit analyzes the read data from the response message; a response code generation unit generates a response code incorporating the read data; the response unit feeds back the response code generated by the response code generation unit to the browser.

The method comprises the steps that under the condition that user input is a remote control request for changing data into a set value, a first message generation unit generates a monitoring message which integrates a storage address of the data to be changed in a memory, the set value and a function code corresponding to the remote control request; the second message analysis unit analyzes the storage address, the set value and the function code from the monitoring message; the data processing unit changes data at the storage address of the memory to a set value and generates a data processing result; the second message generating unit generates a response message integrated with the data processing result; the first message analysis unit analyzes a data processing result from the response message; a response code generation unit generates a response code into which the data processing result is integrated; the response unit feeds back the generated response code to the browser.

As an example, the converter control module 110 is also used for reading stored converter data, in particular from a memory, wherein the converter data stored in the memory may have been changed to a set value by a user input. In this case, the converter control module 110 may control the output of the converter according to the read converter data, thereby implementing the control of the output of the converter through the user input. In addition, the various messages referred to above may comply with MODBUS TCP or MODBUS 485 protocols.

As an example, the converter control module 110 may be implemented by a Digital Signal Processor (DSP). The WEB service module 130 and the data interaction module 120 may be implemented by ARM processors. The data interaction module 120 may be implemented by a MODBUS protocol stack, especially a MODBUS protocol stack on an ARM processor. The WEB service module 130 and the data interaction module 120 may be implemented in a LINUX operating system running on an ARM processor. The WEB service module 130 and the data interaction module 120 may communicate through a socket or a public gateway interface. The WEB services module 130 communicates with the browser through a user interface (e.g., a user interface based on the TCP/IP protocol). Here, ARM is an abbreviation of Advanced RISC Machine (Advanced RISC Machine), and RISC is an abbreviation of Reduced Instruction Set Computer (Reduced Instruction Set Computer). TCP is an abbreviation for Transmission Control Protocol (Transmission Control Protocol), and IP is an abbreviation for Internet Protocol (Internet Protocol).

Fig. 2 shows a block diagram of a current transformer according to an exemplary embodiment of the present invention.

As shown in fig. 2, the current transformer 200 of the present exemplary embodiment may include: a monitoring device 210 and an inverter system 220. The monitoring device 210 may include a converter control module 211, a data interaction module 212 electrically connected to the converter control module 211, and a WEB service module 213 electrically connected to the data interaction module 212. The inverter system 240 may be electrically connected to the converter control module 210 for performing electrical energy conversion.

The converter control module 211 is used to collect and store converter data. The converter control module 211 may collect converter data from the inverter system 240, or may collect converter data through a sensor or the like for detecting the state of the converter. In this case, the converter 200 may further include a memory (not shown) into which the converter control module 211 stores the converter data. Subsequently, the collected current transformer data is collected and stored. An example of the Memory may be a shared Random Access Memory (RAM).

The WEB service module 213 is configured to receive a user input from a browser communicating with the converter 200, generate a monitoring message according to the received user input, and send the generated monitoring message to the data interaction module 212. The data interaction module 212 is configured to receive the monitoring message, and process the stored converter data according to the received monitoring message.

The inverter control module 211 can perform read, write, and rewrite operations on the memory. The data interaction module 212 may also perform read, write, and rewrite operations on the memory. Therefore, the converter control module 211 and the data exchange module 212 exchange data through the memory.

The WEB service module 213 may provide a page (or WEB page) code to the browser according to a request of the browser, so that the browser generates or updates a page according to the page code. The WEB service module 213 may be implemented by a HyperText Transfer Protocol (http) program. The page code of the WEB service module 213 may be implemented by one of: hypertext Preprocessor (PHP) Language, JAVA Language, C # Language, and Hypertext Markup Language (HTML). The page code of the WEB service module 213 may also include code written in the JAVASCRIPT language.

A browser running on a general-purpose computer may communicate with the WEB service module 213 (for example, communication via Transmission Control Protocol (TCP)), so as to implement data interaction between the browser and the WEB service module 213. For example, the browser downloads page code from the WEB service module 213, which may include page code written in HTML and JAVASCRIPT languages; the browser sends a request message integrated with the user input to the WEB service module 213; the WEB service module 213 listens to the 80 port for the browser's request message and responds.

The WEB service module 213 can send a response code to the browser in response to the user input and can return to the listening state after responding. The browser may update the page displayed to the user according to the response code so as to display the data requested by the user or the corresponding processing result to the user.

By way of example, the WEB services module 213 may include: a first message generation unit (not shown), a first message parsing unit (not shown), a response code generation unit (not shown), and a response unit (not shown). The data interaction module 212 may include: a second message parsing unit (not shown), a data processing unit (not shown), and a second message generating unit (not shown).

The method comprises the steps that under the condition that user input is a remote control request for changing data into a set value, a first message generation unit generates a monitoring message which integrates a storage address of the data to be changed in a memory, the set value and a function code corresponding to the remote control request; the second message analysis unit analyzes the storage address, the set value and the function code from the monitoring message; the data processing unit changes the data at the storage address of the memory into a set value and generates a data processing result; the second message generating unit generates a response message integrated with the data processing result; the first message analysis unit analyzes a data processing result from the response message; a response code generation unit generates a response code into which the data processing result is integrated; the response unit feeds back the generated response code to the browser.

As an example, the converter control module 211 is also used for reading stored converter data, in particular from a memory, wherein the converter data stored in the memory may have been changed to a set value by a user input. In this case, the converter control module 211 may control the output of the converter according to the read converter data, thereby implementing the control of the output of the converter through the user input. In addition, the various messages referred to above may comply with MODBUS TCP or MODBUS 485 protocols.

As an example, the converter control module 211 may be implemented by a Digital Signal Processor (DSP). The WEB service module 213 and the data interaction module 212 may be implemented by ARM processors. The data interaction module 212 may be implemented by a MODBUS protocol stack, especially a MODBUS protocol stack on an ARM processor. The WEB service module 213 and the data interaction module 212 may be implemented in a LINUX operating system running on an ARM processor. The WEB service module 213 and the data interaction module 212 can communicate through a socket or a public gateway interface. The WEB service module 213 communicates with the browser through a user interface (e.g., a user interface based on the TCP/IP protocol). Here, ARM is an abbreviation of Advanced RISC Machine (Advanced RISC Machine), and RISC is an abbreviation of Reduced Instruction Set Computer (Reduced Instruction Set Computer). TCP is an abbreviation for Transmission Control Protocol (Transmission Control Protocol), and IP is an abbreviation for Internet Protocol (Internet Protocol).

An embodiment of implementing the telemetry of the dc voltage by user input on the basis of the monitoring device shown in fig. 1 or the current transformer shown in fig. 2 is as follows. The converter data can be collected by a sensor or other devices for detecting the state of the converter, and the sampling value can be obtained. The converter control module may calculate a 612V dc voltage value based on the sampling value, and then write the 612V dc voltage value into an offset address of the memory corresponding to the memory address. The user uses the browser to connect with the WEB service module and can send a page request to the WEB service module. The browser generates a page (e.g., index. php) according to the page code returned by the WEB service module. The user inputs an input for telemetry of the dc voltage through the browser, which sends a request including the user input to the WEB services module. The WEB services module may establish a socket connection with the data interaction module (e.g., using 127.0.0.1 IP (i.e., Internet Protocol, chinese name being Internet Protocol) address and port number 502). The WEB service module may send a Hexadecimal (HEX) query message (encoded as "000800000006010302400001") to the data interaction module through the socket. The data interaction module receives the query message, analyzes the address code '0240' to be queried, and then queries a direct current voltage with a value of 612 from the address of the memory corresponding to the address code '0240'. The data interaction module feeds back the dc voltage with the value 612 to the WEB service module 222 in the form of a response message (coded as "0008000000050103020264"). The WEB service module analyzes the direct-current voltage value from the response message, integrates the direct-current voltage value into the response code, and feeds the response code back to the browser. After the browser receives the response code, the direct current voltage value contained in the response code is displayed in a page, so that the direct current voltage value of 612V is presented to the user.

In the embodiment of telemetry of the dc voltage, a message sent by the WEB service module to the data interaction module is shown in table 1 below, and a message fed back to the WEB service module by the data interaction module is shown in table 2 below.

TABLE 1

TABLE 2

An embodiment for implementing remote control or remote regulation of the dc voltage by user input based on the monitoring device shown in fig. 1 or the converter shown in fig. 2 is as follows. The user makes a power setting by at least one of "active settings" column, box, option and button in the browser, setting the setting value to 50 kW. Php, and enters "50 kW" in the "active settings" column, and clicks the settings button. The browser sends a request to the WEB services module containing the type of operation (i.e., active setting) and the set point (i.e., 50 kW). The WEB service module can establish a socket connection with the data interaction module. The WEB service module receives a request of a browser and sends a hexadecimal message (coded as '092F 000000060106086A 0032') to the data interaction module through the socket. The data interaction module receives the message, analyzes that the data corresponding to the address code 086A needs to be subjected to active setting operation, and the set value is 50 kW. The data interaction module sets the value stored in the address corresponding to the address code "086A" of the memory to 50, and feeds back a response message (coded as "092F 000000060106086A 0032") to the WEB service module to indicate that the setting is successful. The WEB service module receives the response message, parses information indicating that the setting is successful from the response message (for example, returns the same value as the set value of 50kW), and feeds back a response code including the information indicating that the setting is successful to the browser. And after receiving the response code, the browser informs the user of successful setting through the page.

In the embodiment of remotely controlling the dc voltage, the message sent by the WEB service module to the data interaction module is shown in table 3 below, and the message fed back to the WEB service module by the data interaction module is shown in table 4 below.

TABLE 3

TABLE 4

As shown in fig. 3, the browser requests basic data to the WEB service module at step S310. For example, the base data may be the code of a default page. In step S320, the browser displays the basic data, for example, the browser generates a page from a code of the page received from the Web service module and displays the generated page to the user. In step S330, it is determined whether a user input is detected. If the user input is detected, step S340 is performed to obtain the information included in the user input, otherwise, step S320 is returned to continue to display the basic data. In step S350, a request is sent to the Web services module based on information contained in the user input. In step S360, a response to the request is received from the Web service module and information contained in the response is displayed, and then, it may return to step S330 to continuously determine whether a user input is detected. In this embodiment, interaction with the user may be accomplished using code written in the JAVASCRIPT language, which may be received from a Web services module and executed in a browser, which may be used to generate or alter pages.

In the invention, the converter can be monitored through the browser, and the browser is installed in a common mobile phone, a tablet personal computer, a desktop computer and the like, so that a user can monitor the converter more conveniently. Data interaction module is realized to accessible MODBUS protocol stack, through the socket communication between WEB service module and the MODBUS protocol stack to make full use of MODBUS protocol stack's function. Certainly, the WEB service module and the data interaction module may communicate with each other in a Common Gateway Interface (CGI). Using socket communication has the advantage of less consumption of processor resources than using CGI communication.

The computer readable storage medium contains program instructions, data files, data structures, etc., or a combination thereof. The program recorded in the computer-readable storage medium may be designed or configured to conform to the present invention, or may be software known to those of ordinary skill in the art. The computer readable storage medium includes a hardware system for storing and executing program commands. Examples of hardware systems are magnetic media (such as hard disks, floppy disks, magnetic tape), optical media (such as CD-ROMs and DVDs), magneto-optical media (such as floppy disks, ROMs, RAMs, flash memory, etc.). The program includes assembly language code or machine code compiled by a compiler and higher-level language code interpreted by an interpreter. The hardware system may be implemented using at least one software module to conform to the present invention.

At least one component of the monitoring device or current transformer described above may be implemented using one or more general or special purpose computers (e.g., a processor, controller, digital signal processor, microcomputer, field programmable array, programmable logic unit, microprocessor, or any other device capable of executing software or executing instructions). The at least one component may run an operating system and may run one or more software applications operating under the operating system. The at least one component may access, store, manipulate, process, and create data when executing software or executing instructions.

The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. It will be apparent to those skilled in the art that various modifications and changes may be made in the embodiments without departing from the spirit of the invention.

Claims

1. A monitoring device for a current transformer, wherein the monitoring device comprises: a converter control module, a data interaction module electrically connected with the converter control module, and a WEB service module electrically connected with the data interaction module,

wherein the converter control module is used for collecting and storing converter data,

the WEB service module is used for receiving user input from a browser communicated with the monitoring device, generating a monitoring message according to the received user input, sending the generated monitoring message to the data interaction module,

the data interaction module is used for receiving the monitoring message and processing the stored converter data according to the received monitoring message,

wherein the monitoring device further comprises a memory for storing the converter data,

wherein, when the user input is a telemetry request for reading data, the WEB service module comprises: the first message generating unit is used for generating a monitoring message integrating the storage address of the data to be read in the memory and the function code corresponding to the telemetering request; the first message analysis unit is used for analyzing the read data from the response message; a response code generation unit for generating a response code into which the read data is integrated; the response unit is used for feeding back the response code generated by the response code generation unit to the browser, and the data interaction module comprises: the second message analysis unit is used for analyzing the storage address and the function code from the monitoring message; a data processing unit for reading data from the memory address of the memory; a second message generation unit for generating a response message incorporating the read data, and/or

When the user input is a remote control request for changing data to a set value, the WEB service module includes: the first message generating unit is used for generating a monitoring message which integrates the storage address of the data to be changed in the memory, the set value and the function code corresponding to the remote control request; the first message analysis unit is used for analyzing a data processing result from the response message; a response code generation unit configured to generate a response code into which the data processing result is integrated; the response unit is used for feeding back the generated response code to the browser, and the data interaction module comprises: the second message analysis unit is used for analyzing the storage address, the set value and the function code from the monitoring message; a data processing unit for changing data at the storage address of the memory to a set value and generating a data processing result; a second message generating unit for generating a response message integrated with the data processing result,

wherein the WEB service module and the data interaction module communicate through a socket or a public gateway interface,

wherein, the WEB service module monitors 80 the port to obtain the request message of the browser,

the converter control module performs reading, writing and rewriting operations on the memory, the data interaction module also performs reading, writing and rewriting operations on the memory, and the converter control module and the data interaction module exchange data through the memory.

2. The monitoring device of claim 1, wherein the converter control module is further configured to read the stored converter data and control the output of the converter based on the read converter data.

3. The monitoring device of claim 1, wherein the converter control module is implemented by a digital signal processor.

4. The monitoring device of claim 1 wherein the WEB services module and the data interaction module are implemented by an ARM processor.

5. The monitoring device of claim 1, wherein the data interaction module is implemented by a MODBUS protocol stack.

6. The monitoring device of claim 1, wherein the WEB services module communicates with the browser through a user interface.

7. A power converter, wherein the power converter comprises an inverter system and a monitoring device according to any one of claims 1-6.