CN113079066B - Communication test system and test method for comprehensive protection measurement and control device - Google Patents
Communication test system and test method for comprehensive protection measurement and control device Download PDFInfo
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- CN113079066B CN113079066B CN202110341625.4A CN202110341625A CN113079066B CN 113079066 B CN113079066 B CN 113079066B CN 202110341625 A CN202110341625 A CN 202110341625A CN 113079066 B CN113079066 B CN 113079066B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L43/18—Protocol analysers
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Abstract
The invention discloses a communication test system and a communication test method for a comprehensive protection measurement and control device, belonging to the technical field of communication test of comprehensive protection measurement and control devices, and aiming at solving the technical problem that the conventional comprehensive protection measurement and control device cannot automatically perform debugging and matching work of a communication protocol before detection. Transmitting information frames of a plurality of communication protocols to the detected comprehensive protection measurement and control device in turn so as to confirm the protocol of the detected comprehensive protection measurement and control device; and simultaneously sending a data set reading instruction to the standard comprehensive protection measurement and control device and the detected comprehensive protection measurement and control device according to the protocol of the detected comprehensive protection measurement and control device. The invention realizes the automatic matching of the communication protocol of the comprehensive protection measurement and control device which accords with the mainstream communication protocol of any manufacturer, solves the problem that the debugging and matching work of the communication protocol are required before the detection of the traditional comprehensive protection measurement and control device, and reduces the labor cost of enterprises.
Description
Technical Field
The invention relates to the technical field of communication test of a comprehensive protection measurement and control device, in particular to a communication test system and a communication test method of the comprehensive protection measurement and control device.
Background
In recent years, along with rapid development of power grid construction and general improvement of automation degree, plant station end automation equipment is more and more widely applied, and comprehensive protection measurement and control devices are used as 'eyes' for detecting equipment operation, whether indexes such as detection accuracy, electric energy quality and the like of the comprehensive protection measurement and control devices meet regulation requirements, whether various electric power parameters can be rapidly and accurately acquired so as to timely master the operation condition of a power grid, and the comprehensive protection measurement and control devices are key for measuring the accuracy of a comprehensive automation system and are necessary conditions for guaranteeing safe operation of the power grid.
At present, comprehensive protection measurement and control devices with different manufacturers, various specifications and various types are used on site, and the communication protocol of each comprehensive protection measurement and control device is five-flower eight door: 103, 105, DL/T645 and the like coexist in the comprehensive protection communication field, so that great challenges are brought to automatic detection work of users, when the users detect the comprehensive protection measurement and control device, the debugging time of a communication system is about 80% of the whole comprehensive protection test duration because of different communication protocols and data identifiers customized by the same communication protocol, the debugging and matching work of the communication protocol cannot be automatically carried out before the detection of the traditional comprehensive protection measurement and control device, and the detection work has a certain threshold, so that labor cost of enterprises is increased.
Disclosure of Invention
The invention aims to solve the problems that the debugging and matching work of a communication protocol is required before the detection of the traditional comprehensive protection measurement and control device and special equipment for testing the communication protocol of the comprehensive protection measurement and control device is lacked, and provides a communication test method and a communication test system for the comprehensive protection measurement and control device.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
in a first aspect, the present invention provides a method for testing communication of a comprehensive protection measurement and control device, the method comprising the following steps:
transmitting information frames of a plurality of communication protocols to the detected comprehensive protection measurement and control device in turn so as to confirm the protocol of the detected comprehensive protection measurement and control device;
according to the protocol of the detected comprehensive protection measurement and control device, simultaneously sending a data set reading instruction to the standard comprehensive protection measurement and control device and the detected comprehensive protection measurement and control device;
comparing the data in the data item returned by the detected comprehensive protection measurement and control device by taking the data in the data item returned by the standard comprehensive protection measurement and control device as a standard, and judging whether the error value of the data item returned by the detected comprehensive protection measurement and control device is smaller than a set value;
and if the data error value between the standard data item and the detected data item is smaller than the set value, matching and recording the corresponding data identifier in the communication data of the detected comprehensive protection measurement and control device with the corresponding data identifier in the communication data returned by the standard comprehensive protection measurement and control device, otherwise, sending a data set reading instruction to the standard comprehensive protection measurement and control device and the detected comprehensive protection measurement and control device again and comparing again.
Preferably, the set value is 5%.
Preferably, the information frame includes a plurality of components including a frame initiator, a slave address field, a control code, a data length field, a data field, a check code, and an ending symbol.
Preferably, each of said components comprises a plurality of bytes, each byte comprising an eight bit binary code, transmitted with a single start bit, a single even check and a single stop bit, and transmitted asynchronously with the lower bits first and then the upper bits.
In a second aspect, the invention provides a communication test system of a comprehensive protection measurement and control device, which comprises a communication test master station of the comprehensive protection measurement and control device and a standard comprehensive protection measurement and control device, wherein a hardware part of the standard comprehensive protection measurement and control device is connected to the communication test master station of the comprehensive protection measurement and control device through a communication interface;
the communication test master station of the comprehensive protection measurement and control device comprises:
protocol confirmation module: the method comprises the steps of alternately sending information frames of a plurality of communication protocols to a detected comprehensive protection measurement and control device so as to confirm the protocol of the detected comprehensive protection measurement and control device;
and a data transmitting module: the system is used for simultaneously sending a data set reading instruction to the standard comprehensive protection measurement and control device and the detected comprehensive protection measurement and control device according to the protocol of the detected comprehensive protection measurement and control device;
and a data comparison module: the method comprises the steps of comparing data in a data item returned by a detected comprehensive protection measurement and control device by taking the data in the data item returned by the standard comprehensive protection measurement and control device as a standard, and judging whether an error value of the data item returned by the detected comprehensive protection measurement and control device is smaller than a set value;
the execution module: and when the data error value between the standard data item and the detected data item is smaller than the set value, matching and recording the corresponding data identifier in the communication data of the detected comprehensive protection measurement and control device with the corresponding data identifier in the communication data returned by the standard comprehensive protection measurement and control device, otherwise, sending a data set reading instruction to the standard comprehensive protection measurement and control device and the detected comprehensive protection measurement and control device again and comparing again.
Preferably, the set value is 5%.
Preferably, the information frame includes a plurality of components including a frame initiator, a slave address field, a control code, a data length field, a data field, a check code, and an ending symbol.
Preferably, each of said components comprises a plurality of bytes, each byte comprising an eight bit binary code, transmitted with a single start bit, a single even check and a single stop bit, and transmitted asynchronously with the lower bits first and then the upper bits.
Compared with the prior art, the invention has the beneficial effects that:
the method comprises the steps of sending information frames of a plurality of communication protocols to the detected comprehensive protection measurement and control device in turn and confirming the protocol of the detected comprehensive protection measurement and control device, sending a data set reading instruction to the standard comprehensive protection measurement and control device and the detected comprehensive protection measurement and control device, judging and comparing error values of data in standard data items and data in detected data items, automatically matching and recording corresponding data identifiers in communication data in the error values, further realizing automatic matching of communication protocols of comprehensive protection measurement and control devices conforming to main flow communication protocols of any manufacturer, solving the problems of debugging and matching of the communication protocols before detection of the conventional comprehensive protection measurement and control device, reducing entrance thresholds of detection work and reducing labor cost of enterprises.
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FIG. 1 is a schematic diagram of the connection of the communication test system of the comprehensive protection measurement and control device.
Fig. 2 is a flow chart of a communication test method of the comprehensive protection measurement and control device provided by the invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
Embodiment one:
referring to fig. 2, a communication test method of a comprehensive protection measurement and control device includes steps of firstly, alternately transmitting information frames of a plurality of communication protocols to a detected comprehensive protection measurement and control device to confirm the protocol of the detected comprehensive protection measurement and control device; then according to the protocol of the detected comprehensive protection measurement and control device, simultaneously sending a data set reading instruction to the standard comprehensive protection measurement and control device and the detected comprehensive protection measurement and control device; then, data in the data item returned by the standard comprehensive protection measurement and control device is used as a standard, the data in the data item returned by the detected comprehensive protection measurement and control device is compared, and whether the error value of the data item returned by the detected comprehensive protection measurement and control device is smaller than a set value is judged; and finally, if the data error value of the standard data item and the data error value of the detected data item are smaller than the set value, matching and recording the corresponding data identifier in the communication data of the detected comprehensive protection measurement and control device with the corresponding data identifier in the communication data returned by the standard comprehensive protection measurement and control device, otherwise, sending a data set reading instruction to the standard comprehensive protection measurement and control device and the detected comprehensive protection measurement and control device again, and comparing again. Here, since the standard comprehensive protection measurement and control device has an accuracy level of 0.05, the detected comprehensive protection measurement and control device has an accuracy level of 0.5 or 1, the difference in maximum error is 5%, and thus the set value is 5%.
It should be noted that, the IEC60870-5-103 communication protocol, the IEC60870-5-105 communication protocol and the DL/T645 protocol all use information frames as basic information units of communication, which can realize point-to-point direct local communication and also realize one-master-multiple-slave local bus communication. The two communication parties work in a half-duplex communication mode of a master-slave structure; for example, the establishment and release of the DL/T645 protocol communication link are controlled by the information frame sent by the communication test master station of the comprehensive protection measurement and control device. Each transmitted information frame consists of a frame initiator, a slave station address field, a control code, a data length field, a data field, a check code, an ending symbol and the like (see the first table); each part is composed of a plurality of bytes, each byte contains eight binary codes, a one-bit initial bit (0), one-bit even check sum and one-bit stop bit are added during transmission, and eleven bits are added; the lower order is transferred first and then the upper order is transferred in an asynchronous mode. The receiver should first determine whether the data frame conforms to the DL/T645 protocol frame format, then determine the device address, and only if the communication address in the data frame corresponds to the device address or is a broadcast address, the device should process the data frame, otherwise, the device should not react to the data frame.
Table one: DL/T645 protocol data frame format
Embodiment two:
1-2, a communication test system of a comprehensive protection measurement and control device comprises a communication test master station of the comprehensive protection measurement and control device and a standard comprehensive protection measurement and control device, wherein a hardware part of the standard comprehensive protection measurement and control device is connected to the communication test master station of the comprehensive protection measurement and control device through a communication interface, and the communication test master station of the comprehensive protection measurement and control device is used as a test protocol system library and a test operation environment and is used for storing source codes of all protocols and deploying a protocol test framework;
the communication test master station of the comprehensive protection measurement and control device comprises a protocol confirmation module, a data transmission module, a data comparison module and an execution module, wherein the protocol confirmation module is used for alternately transmitting information frames of a plurality of communication protocols to the detected comprehensive protection measurement and control device so as to confirm the protocol of the detected comprehensive protection measurement and control device; the data transmitting module is used for transmitting a data set reading instruction to the standard comprehensive protection measurement and control device and the detected comprehensive protection measurement and control device according to the protocol of the detected comprehensive protection measurement and control device; the data comparison module is used for comparing the data in the data item returned by the detected comprehensive protection measurement and control device by taking the data in the data item returned by the standard comprehensive protection measurement and control device as a standard, and judging whether the error value of the data item returned by the detected comprehensive protection measurement and control device is smaller than a set value; and the execution module is used for matching and recording the corresponding data identifier in the communication data of the detected comprehensive protection measurement and control device with the corresponding data identifier in the communication data returned by the standard comprehensive protection measurement and control device when the data error value of the standard data item and the detected data item is smaller than the set value, otherwise, sending a data set reading instruction to the standard comprehensive protection measurement and control device and the detected comprehensive protection measurement and control device again and comparing the data set reading instruction with the data set reading instruction again. Because the accuracy grade of the standard comprehensive protection measurement and control device is 0.05 grade, the accuracy grade of the detected comprehensive protection measurement and control device is 0.5 grade or 1 grade, the difference of the maximum errors is 5%, and the set value is 5%. The information frame comprises a frame initiator, a slave station address field, a control code, a data length field, a data field, a check code and an ending symbol, wherein each component comprises a plurality of bytes, each byte comprises an eight-bit binary code, a bit of initial bit is added during transmission, a bit of even check and a bit of stop bit are added, and the lower bits are transmitted first and then the upper bits are transmitted in an asynchronous mode.
For example, if the communication protocol of the detected comprehensive protection measurement and control device is confirmed to be DL/T645 protocol by the protocol confirmation module, the system issues a data frame 68H FF FF FF FF FF FF 68H B6 FF 7F 16H,FF FF FF FF FF FF to the comprehensive protection measurement and control device for a broadcast address specified by the DL/T645 protocol, B6 is a control code for electrical measurement of voltage, current, active power, reactive power, power factor and the like, B6 is followed by a data length, FF represents a data set, and B6 FF represents a set of electrical measurement data requested by the comprehensive protection measurement and control device communication test master station to the comprehensive protection measurement and control device. At this time, the comprehensive protection measurement and control device will reply to the communication test master station of the comprehensive protection measurement and control device, the frame format is 68H A0 A1 A2 A3 A4 A5 68H A1L DI0 DI1 N1 … NmAAH DI0 DI 2N 2 … NmAAH CS 16H, wherein the frame 68H is a frame initiator, A0 A1 A2 A3 A4 A5 is a slave address field, the next 68H is a data frame initiator, A1 indicates that there is a subsequent frame, L indicates a data field length, DI0 DI1 is a data identifier, N1 … Nm indicates a data item, and AAH is a separator between data blocks of the data set. After the system reads the data set of the comprehensive protection measurement and control device, the data N1 … Nm of each data block is compared with the data returned by the standard comprehensive protection measurement and control device, and the data identification is automatically matched in the system.
As shown in fig. 1, the hardware parts of the detected comprehensive protection measurement and control device and the standard comprehensive protection measurement and control device are connected to a protocol test comprehensive protection measurement and control device communication test master station through a communication interface, and the voltage and current loop of the standard comprehensive protection measurement and control device is connected to the detected comprehensive protection measurement and control device. For example, the comprehensive protection measurement and control device with 100V and 5A three-phase four-wire is used, the communication test master station of the comprehensive protection measurement and control device issues a command to the standard comprehensive protection measurement and control device, voltage and current corresponding to a required test point are applied, and as shown in figure 2, the system automatically sets the three-phase voltage of the standard comprehensive protection measurement and control device to 30% Ua,60% Ub,100% Uc and the three-phase current to 30% Ia,60% Ib and 100% ic. The purpose of setting is in order to distinguish the numerical value of three-phase voltage, three-phase current like this, and the data identification of each parameter of automatic discernment of system of being convenient for. And after the voltage and the current applied by the communication test master station of the comprehensive protection measurement and control device are stable, the comprehensive protection measurement and control device sends a data set reading instruction to the standard comprehensive protection measurement and control device and the detected comprehensive protection measurement and control device. At this time, the system takes the data in the data item returned by the standard comprehensive protection measurement and control device as the standard, compares the data in the data item returned by the detected comprehensive protection measurement and control device, such as the data value less than 5%, and defaults to be consistent (because the accuracy level of the standard comprehensive protection measurement and control device is 0.05 level, the accuracy level of the detected comprehensive protection measurement and control device is 0.5 level or 1 level, the difference of the maximum error is 5%), at this time, the system directly matches and records the corresponding data mark in the communication data of the detected comprehensive protection measurement and control device with the corresponding data mark in the communication data returned by the standard comprehensive protection measurement and control device, otherwise, sends a data set reading instruction to the standard comprehensive protection measurement and control device and the detected comprehensive protection measurement and control device again, and compares the data in the standard data item and the detected comprehensive protection measurement and control device again until the data error value in the standard data item is less than the set value.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (4)
1. A communication test method for a comprehensive protection measurement and control device is characterized by comprising the following steps:
transmitting information frames of a plurality of communication protocols to the detected comprehensive protection measurement and control device in turn so as to confirm the protocol of the detected comprehensive protection measurement and control device;
according to the protocol of the detected comprehensive protection measurement and control device, simultaneously sending a data set reading instruction to the standard comprehensive protection measurement and control device and the detected comprehensive protection measurement and control device;
comparing the data in the data item returned by the detected comprehensive protection measurement and control device by taking the data in the data item returned by the standard comprehensive protection measurement and control device as a standard, and judging whether the error value of the data item returned by the detected comprehensive protection measurement and control device is smaller than a set value;
if the data error value between the standard data item and the detected data item is smaller than the set value, matching and recording the corresponding data identifier in the communication data of the detected comprehensive protection measurement and control device with the corresponding data identifier in the communication data returned by the standard comprehensive protection measurement and control device, otherwise, sending a data set reading instruction to the standard comprehensive protection measurement and control device and the detected comprehensive protection measurement and control device again and comparing again;
the information frame comprises a frame initiator, a slave station address field, a control code, a data length field, a data field, a check code and an ending symbol; each component part comprises a plurality of bytes, each byte comprises an eight-bit binary code, a one-bit initial bit, a one-bit even check and a one-bit stop bit are added during transmission, and the lower bits are transmitted firstly and the higher bits are transmitted secondly in an asynchronous mode;
the communication protocol includes: IEC60870-5-103 communication protocol, IEC60870-5-105 communication protocol, and DL/T645 protocol;
the detected comprehensive protection measurement and control device is used as a receiver to receive the information frame and then executes the following steps:
judging whether the information frame accords with a communication protocol frame format or not, and judging the equipment address: the detected comprehensive protection measurement and control device responds and replies to the information frame only when the communication address in the information frame corresponds to the address of the detected comprehensive protection measurement and control device or the broadcast address, otherwise, the detected comprehensive protection measurement and control device does not respond and reply to the information frame; the frame format of the reply comprises a frame initiator, a slave address field, a data frame initiator, a subsequent frame, a data field length, a data identifier, a data item and a separator among data blocks of a data set.
2. The communication test method of the comprehensive protection measurement and control device according to claim 1, wherein the set value is 5%.
3. The communication test system of the comprehensive protection measurement and control device is characterized by comprising a communication test master station of the comprehensive protection measurement and control device and a standard comprehensive protection measurement and control device, wherein the hardware part of the standard comprehensive protection measurement and control device is connected to the communication test master station of the comprehensive protection measurement and control device through a communication interface;
the communication test master station of the comprehensive protection measurement and control device comprises:
protocol confirmation module: the method comprises the steps of alternately sending information frames of a plurality of communication protocols to a detected comprehensive protection measurement and control device so as to confirm the protocol of the detected comprehensive protection measurement and control device;
and a data transmitting module: the system is used for simultaneously sending a data set reading instruction to the standard comprehensive protection measurement and control device and the detected comprehensive protection measurement and control device according to the protocol of the detected comprehensive protection measurement and control device;
and a data comparison module: the method comprises the steps of comparing data in a data item returned by a detected comprehensive protection measurement and control device by taking the data in the data item returned by the standard comprehensive protection measurement and control device as a standard, and judging whether an error value of the data item returned by the detected comprehensive protection measurement and control device is smaller than a set value;
the execution module: when the data error value between the standard data item and the detected data item is smaller than the set value, matching and recording the corresponding data identifier in the communication data of the detected comprehensive protection measurement and control device with the corresponding data identifier in the communication data returned by the standard comprehensive protection measurement and control device, otherwise, sending a data set reading instruction to the standard comprehensive protection measurement and control device and the detected comprehensive protection measurement and control device again and comparing again;
the information frame comprises a frame initiator, a slave station address field, a control code, a data length field, a data field, a check code and an ending symbol; each component part comprises a plurality of bytes, each byte comprises an eight-bit binary code, a one-bit initial bit, a one-bit even check and a one-bit stop bit are added during transmission, and the lower bits are transmitted firstly and the higher bits are transmitted secondly in an asynchronous mode;
the communication protocol includes: IEC60870-5-103 communication protocol, IEC60870-5-105 communication protocol, and DL/T645 protocol;
the detected comprehensive protection measurement and control device is used as a receiver to receive the information frame and then executes the following steps:
judging whether the information frame accords with a communication protocol frame format or not, and judging the equipment address: the detected comprehensive protection measurement and control device responds and replies to the information frame only when the communication address in the information frame corresponds to the address of the detected comprehensive protection measurement and control device or the broadcast address, otherwise, the detected comprehensive protection measurement and control device does not respond and reply to the information frame; the frame format of the reply comprises a frame initiator, a slave address field, a data frame initiator, a subsequent frame, a data field length, a data identifier, a data item and a separator among data blocks of a data set.
4. The system of claim 3, wherein the set point is 5%.
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