CN112532618A - Non-transparent protocol conversion method and device for joint debugging test of stability control test system - Google Patents
Non-transparent protocol conversion method and device for joint debugging test of stability control test system Download PDFInfo
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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
- H04L67/2866—Architectures; Arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
- H04L43/0817—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking functioning
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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
Abstract
The invention discloses a non-transparent protocol conversion method for joint debugging test of a stability control test system, which comprises the steps of converting, judging and checking a test message between an Ethernet message format and an E1 message format and then sending the test message. The invention also discloses a protocol conversion device. Compared with the prior art, the protocol conversion between the Ethernet message format and the E1 message format is adopted to convert and transmit the test message, so that the remote single-machine control command test and the multi-machine control command test of the stability control test system are realized, the test efficiency of the stability control device of the power system is improved, and more accurate test results can be obtained.
Description
Technical Field
The invention relates to the field of safety control of power systems, in particular to a non-transparent protocol conversion method and a non-transparent protocol conversion device for joint debugging test of a stability control test system.
Background
The current power system is a complex power grid comprising an alternating current-direct current (AC-DC) series-parallel connection, and the power grid has the problems of high-power loss, cross section out-of-limit, interconnection line overload, voltage frequency instability and the like caused by extra-high voltage/extra-high voltage DC faults. When a stability risk occurs, the stability control device needs to adopt different control disposal strategies to ensure safe, ordered and reliable power supply of the power grid. Therefore, the operation accuracy of the safety and stability control device (stability control device) is very important. The control strategies and functions of each stability control project are different, and with each change of the power grid architecture, the control strategies of the stability control device need to be correspondingly upgraded, so that a large amount of targeted test work is needed, and the stability control project has wide area and many stations.
At present, joint debugging test of a plant station stable control device and a stable control main station basically adopts a mode that the main station actually issues commands to the plant station, and the main defects are as follows: 1) the power grid power failure joint debugging is involved, the planned power failure needs to be declared, the power failure time is short, and the site pressure of joint debugging personnel is large; 2) the cooperation of personnel in multiple stations is needed, and the joint debugging is difficult; 3) the computer stability control test system software cannot directly communicate with the stability control device, and cannot perform pre-test. Therefore, it is necessary to develop a protocol conversion device for remote testing of a stability control testing system, which is significant for reducing the workload of power grid operation and maintenance personnel, improving the testing efficiency and ensuring the testing accuracy.
Disclosure of Invention
The invention aims to provide a non-transparent protocol conversion method and a non-transparent protocol conversion device for joint debugging test of a stability control test system, which aims to solve the technical problem of providing a remote transmission and conversion path of a stability control test message and realize remote one-to-one and one-to-many control command test of the stability control test system; the efficiency of electric power system stability control device test is improved to can obtain more accurate test result. .
In order to solve the problems, the invention adopts the following technical scheme: a non-transparent protocol conversion method for joint debugging test of a stability control test system comprises the steps of carrying out conversion judgment and verification on a test message between an Ethernet message format and an E1 message format, and then sending the test message, wherein:
converting the test message from the Ethernet message format to the E1 message format by the following steps:
step S1, the protocol conversion device obtains the test message;
step S2, the protocol conversion device judges whether the transmission mode of the test message is the same as the transmission mode set by itself and whether the destination address in the test message is the same as the dial address in the dial information of the protocol conversion device; when the transmission mode of the test message is the same as the transmission mode set by the protocol conversion device itself, and the destination address in the test message is the same as the dial address in the dial information of the protocol conversion device, step S3 is executed; when the transmission mode of the test message is different from the transmission mode set by the protocol conversion device and the destination address in the test message is different from the dial address of the protocol conversion device by more than one item, discarding the test message;
the dial information comprises a transmission mode and a dial address;
step S3, the protocol conversion device carries out accumulation and CRC16 and CRC32 verification on the test messages, extracts the test data in the test messages to be checked and stores the test data in the test messages into a memory, generates new events and adds the events to a queue to be sent of the FIFO memory for queuing; the queue to be sent comprises at least one queued event, and the event comprises an initial address of the test message in the RAM;
step S4, the protocol conversion device reads the queue to be sent in the FIFO memory according to the sequence, and extracts the corresponding test message in the memory in sequence to send according to the initial address of the test message in the event in the memory;
step S5, the protocol conversion device sends the test message after encoding the test message;
converting the test message from E1 message format to Ethernet message format, the following steps are adopted:
step S6, decoding the coded test message after the protocol conversion device receives the coded test message;
step S7, the protocol conversion device adds a frame head and a frame tail identifier to the test message according to the transmission mode set by itself, then carries out accumulation and verification, temporarily stores the test message into a memory after the verification is passed, and simultaneously updates the total frame number, the frame length and the cycle number in the memory; discarding the test message when the verification fails;
step S8, the protocol conversion device generates a sending enabling signal, the initial address of the test message in the memory and the byte length of the test message at intervals of t;
step S9, the protocol conversion device extracts the corresponding test message from the memory according to the transmission enable signal, the initial address of the test message in the memory, and the byte length information of the test message, and then adds the destination address, the source address, the message type, and the length of the test message, and then transmits the test message.
Further, the following steps: in step S4, when there is no queued event in the queue to be sent, the test packet corresponding to the last event sent is repeatedly sent.
Further, the time t in the step S8 is 10 ms.
Further, in step S9, after extracting the corresponding test packet from the memory, adding the destination address, the source address, the packet type, and the test packet length, and simultaneously determining whether the test packet length is greater than or equal to 44 bytes, performing CRC32 check when the test packet length is greater than or equal to 44 bytes, and sending the test packet after the check is passed; when the verification is not passed, discarding the test message; when the length of the test message is less than 44 bytes, filling the tail of the test message to 44 bytes, then performing CRC32 verification, and sending the test message after the verification is passed; and when the verification is not passed, discarding the test message.
Further, the step S5 includes:
the protocol conversion device carries out CRC16 verification on the test message to be sent, and converts the byte state of the test message into a bit state after the verification is passed; when the verification fails, discarding the test message; then, HDLC coding, 1B4B coding and HDB3 coding are carried out in sequence and then transmitted.
Further, the step S6 includes:
carrying out HDB3 decoding, 4B1B decoding and HDLC decoding on the coded test message in sequence; converting the decoded test message from a bit state to a byte state, then performing CRC16 verification, and executing step S7 when the verification is passed; and when the verification fails, discarding the test message.
The invention also discloses a protocol conversion device, comprising:
the RJ45 electric port is used for receiving and sending test messages in an Ethernet message format;
the E1 interface is used for receiving and sending test messages in an E1 message format;
the PHY is used for converting the test message received through the RJ45 electric port, and sending the test message to the control module or receiving the test message sent by the control module, converting the test message and sending the test message through the RJ45 electric port;
the control module is used for working according to a transmission mode set by the dial switch, receiving a test message sent by the E1 conversion module or the PHY, and executing corresponding operation;
the FIFO storage module is used for generating corresponding events according to the storage sequence of the first storage module and adding the events into a queue to be sent for the control module to call, the queue to be sent comprises at least one event, and the event comprises the initial address of the test message in the first storage module;
the first storage module is used for storing the test message sent by the PHY received by the control module;
the second storage module is used for storing the decoded test message sent by the E1 conversion module and received by the control module;
the clock module is used for providing clock signals required by the control module and the PHY;
the power supply module is used for supplying power to all modules of the device;
the watchdog reset module is used for sending a reset signal to the control module;
the indicator light is used for prompting;
the dial switch is used for setting dial information;
the configuration interface is used for debugging and burning the control module;
the level conversion module is used for converting the voltage;
the isolation transformer is used for signal coupling, electrical isolation and suppression of common mode and differential mode noise;
the E1 conversion module is used for decoding and encoding the test message, and performing E1 decoding and E1 encoding on the test message received by the E1 interface or the test message sent by the control module;
when the control module receives a test message sent by the E1 conversion module, the test message is added with corresponding information according to a transmission mode set by the dial switch and then is checked and temporarily stored in the second storage module, a sending enabling signal, the initial address of the test message in the second storage module and the byte length information of the test message are generated at intervals of t, and according to the sending enabling signal, the initial address of the test message in the second storage module and the byte length information of the test message, the corresponding test message is extracted from the second storage module, and then a destination address, a source address, a message type and the length of the test message are added, and the test message is sent to a PHY after being transcoded and then is sent through an RJ45 interface;
when the control module receives a test message sent by the PHY, whether the transmission mode of the test message is the same as the transmission mode set by the dial switch and whether the destination address of the test message is the same as the dial address in the dial information of the dial switch are judged, when the transmission mode of the test message is the same as the transmission mode set by the dial switch and the destination address of the test message are the same as the dial address in the dial information of the dial switch, the test message is stored in the first storage module, the events in the sending queue are sequentially read according to the events in the queue to be sent in the FIFO storage module, the corresponding test message is sequentially extracted from the first storage module, sent to the E1 conversion module for coding, and then; and when at least one of the transmission mode of the test message and the transmission mode set by the dial switch and the destination address of the test message and the dial address in the dial information of the dial switch is different, discarding the test message.
Further, the E1 decoding includes the E1 conversion module performing HDB3 decoding, 4B1B decoding, HDLC decoding, and CRC16 verification on the test packet converted by the E1 interface, the isolation transformer, and the level conversion module; the E1 encoding comprises the step that the E1 conversion module carries out CRC16 verification, HDLC encoding, 1B4B encoding and HDB3 encoding on the test message sent by the control module.
Further, the control module also repeatedly sends the last event when no event exists in the queue to be sent.
Further, the control module extracts the corresponding test message from the second storage module according to the transmission enable signal, the initial address of the test message in the second storage module and the byte length information of the test message, adds the destination address, the source address, the message type and the test message length, and simultaneously judges whether the test message length is greater than or equal to 44 bytes, performs CRC32 verification when the test message length is greater than or equal to 44 bytes, and transmits the test message through PHY and RJ45 electric ports after the verification is passed; when the verification is not passed, discarding the test message; when the number of bytes is less than 44, filling the tail of the test message to 44 bytes, then performing CRC32 verification, and when the verification is passed, transmitting the test message through PHY and RJ45 electric ports; and when the verification is not passed, discarding the test message.
Compared with the prior art, the invention has the advantages that the protocol conversion between the Ethernet message format and the E1 message format is adopted, the test message is converted and transmitted, the remote single-machine control command test and the multi-machine control command test of the stability control test system are realized, the test efficiency of the stability control device of the power system is improved, and more accurate test results can be obtained.
Drawings
Fig. 1 is a topology diagram of the present invention.
Fig. 2 is a flow chart of the ethernet message format to E1 message format protocol conversion of the present invention.
Fig. 3 is a flow chart of the E1 message format to ethernet message format protocol conversion of the present invention.
Fig. 4 is a block diagram showing the structure of the protocol conversion apparatus of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, the topological diagram of the joint debugging of the protocol conversion device for joint debugging test of the stability control test system in the stable control command joint debugging of multiple stations of the invention includes that one of the stations which is respectively arranged in the transformer substation requiring the stable control joint debugging test is set as a master station, and the other stations are used as substations; the method comprises the following steps that two protocol conversion devices are arranged in a main station, a test host (host) is arranged in the main station, the test host is connected with the two protocol conversion devices through a switch, one of the protocol conversion devices is connected with a stable control host of the main station through a photoelectric conversion device of the main station, and the stable control host of the main station is respectively connected with a stable control submachine of the main station; the other protocol conversion device is connected with the photoelectric conversion device of the substation through a power dispatching data network, and the photoelectric conversion device of the substation is connected with the stable control host of the substation; the stable control host machine of the substation is connected with the stable control sub-machine of the substation; a test host (host) is arranged in the master station and used for sending test messages, the test messages comprise stability control commands, and the host is connected with the protocol conversion device through a switch; the test message is coded by the protocol conversion device and then sent to the stable control host of the master station and the substation through the photoelectric conversion device, the stable control host executes a control command after receiving the test message, and the running data of the stable control host is returned to the test host through the same way, so that the test is completed.
In the invention, the test message comprises a stability control command.
The invention discloses a non-transparent protocol conversion method (method) for joint debugging test of a stability control test system, which comprises the steps of converting (decoding and encoding) test messages between an Ethernet message format and an E1 message format, judging and checking the test messages, and then sending the test messages, namely converting the Ethernet message format into the test messages of the E1 message format and converting the E1 message format into the test messages of the Ethernet message format, wherein,
firstly, as shown in fig. 2, converting the test packet from the ethernet packet format to the E1 packet format is implemented by the following steps:
step S1, a protocol conversion device (device) acquires a test message; specifically, the protocol conversion device receives a test message in an ethernet message format through an RJ45 electrical port;
step S2, the protocol conversion device judges whether the transmission mode of the test message is the same as the transmission mode set by the device and whether the destination address in the test message is the same as the dial address in the dial information of the device; when the transmission mode of the test message is the same as the transmission mode set by the device itself, and the destination address in the test message is the same as the dial address in the dial information of the device, step S3 is executed; when the transmission mode of the test message is different from the transmission mode set by the device per se and the destination address in the test message is different from the dial address of the device by more than one item, abandoning the test message;
the dial information comprises a transmission mode and a dial address, the dial information is a binary code and has 8 bits, the 1 st bit and the 2 nd bit are used for setting the transmission mode, and the 3 rd bit to the 8 th bit are used for setting the dial address of 1 to 64;
step S3, the protocol conversion device carries out accumulation and CRC16 and CRC32 verification on the test messages, extracts the test data in the test messages to be stored in a memory (RAM) and generates new events to be added into a queue to be sent of a FIFO memory (FIFO) for queuing for the test messages passing the verification; the queue to be sent comprises at least one queued event, and the event comprises an initial address of the test message in the RAM; the summation, CRC16 and CRC32 checks are in the prior art and are not limited herein; discarding the test message which fails to pass one of the cumulative sum, the CRC16 and the CRC32 check;
step S4, the protocol conversion device reads the queue to be sent in FIFO according to the sequence according to the frequency of 0.6k (1.667 ms/frame), and extracts the corresponding test message in RAM in sequence for sending according to the initial address of the test message in the event in RAM; and when the queue to be sent is not provided with queued events (is empty), repeatedly sending the test message corresponding to the last event to be sent.
Step S5, the protocol conversion device sends the test message after encoding the test message; specifically, the protocol conversion device sends a test message in an E1 message format through an E1 interface; the method comprises the following specific steps:
step S51, the protocol conversion device carries out CRC16 check on the test message to be sent, and the test message is converted from a byte state to a bit state after the check is passed; when the verification fails, discarding the test message;
step S52, carrying out HDLC coding on the test message;
s53, carrying out 1B4B coding on the HDLC coded test message;
and S54, carrying out HDB3 coding on the test message coded by the 1B4B and then sending the test message.
Secondly, as shown in fig. 3, converting the test packet from the E1 packet format to the ethernet packet format is implemented by the following steps:
step S6, decoding the coded test message after the protocol conversion device receives the coded test message; specifically, the protocol conversion device receives a test message in an E1 message format through an E1 interface;
step S7, the protocol conversion device adds a frame head and a frame tail identifier (0x7e) to the test message according to the transmission mode set by the device, then accumulates and verifies the test message, temporarily stores the test message into the RAM after the verification is passed, and simultaneously updates the total frame number, the frame length and the cycle number in the RAM; discarding the test message when the verification fails;
step S8, the protocol conversion device generates a sending enabling signal, the initial address of the test message in the RAM and the byte length of the test message at intervals of t; the time t is 10 ms;
step S9, the protocol conversion device extracts the corresponding test message from the memory according to the transmission enable signal, the initial address of the test message in the RAM and the byte length information of the test message, adds the destination address, the source address, the message type and the test message length, and judges whether the test message length is greater than or equal to 44 bytes, when the test message length is greater than or equal to 44 bytes, the CRC32 check is carried out, and when the check is passed, the protocol conversion device transmits the test message; when the verification is not passed, discarding the test message; when the length of the test message is less than 44 bytes, filling the tail of the test message to 44 bytes, then performing CRC32 verification, and sending the test message after the verification is passed; when the verification is not passed, discarding the test message; the added source address and destination address are determined by the dial address in the dial information of the protocol conversion device.
Specifically, the end of frame of the test message is padded to add 0x00 at the end of frame, that is, the message is not enough with 44 bytes, and the content added at the end of frame of the message is 0, so as to ensure that the padded message is 44 bytes. The decoding performed after the protocol conversion device receives the encoded test report in step S6 of the present invention specifically includes:
step S61, carrying out HDB3 decoding on the coded test message;
step S62, carrying out 4B1B decoding on the test message subjected to HDB3 decoding;
and step S63, carrying out HDLC decoding on the test message subjected to the 4B1B decoding.
Step S64, the protocol conversion device converts the decoded test message from bit state to byte state, then CRC16 check is carried out, and when the check is passed, step S7 is executed; and when the verification fails, discarding the test message.
Example 1
The process of the present invention is further illustrated below; in this example, as shown in fig. 1, the station a and the station B perform joint debugging test of the stability control device;
the implementation steps are as follows:
the station A stability control test host communicates with the station A stability control host through a protocol conversion device A;
the station A stability control test host communicates with the stability control host of the station B through a power data network by a protocol conversion device B;
a, B two protocol conversion devices in the station A adopt the same transmission mode, and dialing addresses in dialing information of each protocol conversion device are different, so that the test message is ensured to be correctly received by the corresponding protocol conversion device;
the station A stability control test host sends command type test messages with different destination addresses, and A, B two protocol conversion devices receive the test messages through the switch;
A. b, the two protocol conversion devices receive the test message, detect whether the transmission mode of the test message is the same as the transmission mode dialed by the protocol conversion device and judge whether the destination address in the test message is the same as the dialing address in the respective dialing information, if at least one of the destination address in the test message is different from the dialing address in the respective dialing information, the test message is discarded, and if both the destination address and the dialing address are the same, the test message is verified;
carrying out conversion coding on the test message passing the verification; discarding the test message which fails to pass the verification;
sending out the encoded message through an E1 interface;
the station A stable control host and the station B stable control host receive respective command type test messages through respective photoelectric conversion devices and execute test commands, and the running data of the station A stable control host and the station B stable control host are returned to the test host through the same way to complete the test.
As shown in fig. 4, a block diagram of a protocol conversion apparatus (device) according to the present invention includes:
the RJ45 electric port is used for receiving and sending test messages in an Ethernet message format, wherein the transmission is 102400 kbit/s;
the E1 interface is used for receiving and sending test messages in an E1 message format, wherein the transmission rate is 2048kbit/s +/-50 ppm, the physical impedance is 75 omega, and the physical interface is an L9 interface;
the PHY (physical layer) is used for converting the test message received by the RJ45 electric port, sending the test message to the control module or receiving the test message sent by the control module, converting the test message and sending the converted test message through the RJ45 electric port; the analog serial signal in the network cable and the Ethernet interface form which can be accepted by the MAC are mutually converted;
the control module is used for working according to a transmission mode set by the dial switch, receiving a test message sent by the E1 conversion module or the PHY, and executing corresponding operation;
the FIFO storage module (FIFO) is used for generating corresponding events according to the storage sequence of the first storage module and adding the events into a queue to be sent for the control module to call, the queue to be sent comprises at least one event, and the event comprises the initial address of the test message in the RAM 1;
the first storage module (RAM1) is used for storing the test message sent by the PHY received by the control module;
the second storage module (RAM2) is used for storing the decoded test message sent by the E1 conversion module and received by the control module; the first storage module and the second storage module can be two partitions in one memory;
the clock module is used for providing clock signals required by the control module and the PHY;
the power supply module is used for supplying power to all modules of the device;
the watchdog reset module is used for sending a reset signal to the control module; after the control module receives the reset signal, reset including: the device is reset for 200ms when being powered on, the control module continuously sends a 1KHz square wave signal to the watchdog chip when in normal operation, and sends a reset signal to the control module when the watchdog reset module does not receive the square wave signal, and the control module resets the device;
the indicator light is used for prompting, and the control unit gives an alarm through the indicator light when the test message in the E1 message format is received and the test message in the E1 message format is interrupted and decoded incorrectly;
the dial switch is used for setting dial information, the dial information comprises a transmission mode and a dial address, and specifically, the dial switch has 8-bit dial, the 1 st bit and the 2 nd bit are used for setting the transmission mode, and the 3 rd bit to the 8 th bit are used for setting the 1 st to the 64 th dial address;
the configuration interface is used for debugging and burning the control module;
and the level conversion module is used for converting the voltage, specifically, converting the voltage between 3.3V and 5V.
The isolation transformer is mainly used for signal coupling, electrical isolation and suppression of common mode and differential mode noises;
an E1 conversion module, configured to decode and encode the test packet, that is, perform E1 decoding and E1 encoding on the test packet received by the E1 interface or the test packet sent by the control module; specifically, the E1 decoding includes the E1 conversion module performing HDB3 decoding, 4B1B decoding, HDLC decoding, and CRC16 verification on the test packet converted by the E1 interface, the isolation transformer, and the level conversion module; the E1 encoding comprises the step that the E1 conversion module carries out CRC16 verification, HDLC encoding, 1B4B encoding and HDB3 encoding on the test message sent by the control module.
When the control module receives a test message sent by the E1 conversion module, the test message is added with corresponding information according to a transmission mode set by the dial switch and then is checked and temporarily stored in the second storage module, a sending enable signal, the initial address of the test message in the RAM2 and the byte length information of the test message are generated at intervals of time t (t is 10ms), and according to the sending enable signal, the initial address of the test message in the RAM2 and the byte length information of the test message, a destination address, a source address, a message type and the length of the test message are added after the corresponding test message is extracted from the RAM2, and then the destination address, the source address, the message type and the length of the test message are transcoded and sent to the PHY through an RJ45 interface; the test message is converted from the E1 message format to the ethernet message format.
The step of adding corresponding information to the test message, then verifying the test message and temporarily storing the test message in the second storage module specifically comprises the following steps: the control module adds a frame head identifier and a frame tail identifier (0x7e) to the test message, then accumulates and verifies the test message, temporarily stores the test message into the RAM2 after the verification is passed, and simultaneously updates the total frame number, the frame length and the cycle number in the RAM 2; and when the verification is not passed, discarding the test message.
The control module extracts a corresponding test message from the RAM2 according to the transmission enable signal, the initial address of the test message in the RAM2 and the byte length information of the test message, adds a destination address, a source address, a message type and the length of the test message, and simultaneously judges whether the length of the test message is greater than or equal to 44 bytes, performs CRC32 verification when the length of the test message is greater than or equal to 44 bytes, and transmits the test message through PHY and RJ45 electric interfaces after the verification is passed; when the verification is not passed, discarding the test message; when the number of bytes is less than 44, filling the tail of the test message to 44 bytes, then performing CRC32 verification, and when the verification is passed, transmitting the test message through PHY and RJ45 electric ports; and when the verification is not passed, discarding the test message. The added source address and destination address are determined by the dial address in the dial information of the protocol conversion device.
When the control module receives a test message sent by the PHY, judging whether the transmission mode of the test message is the same as the transmission mode set by the dial switch or not and whether the destination address of the test message is the same as the dial address in the dial information of the dial switch or not, storing the test message to a first storage module when the transmission mode of the test message is the same as the transmission mode of the dial switch and the destination address of the test message is the same as the dial address in the dial information of the dial switch, sequentially reading events in a sending queue according to the frequency of 0.6K in the FIFO, then sequentially extracting corresponding test messages from the first storage module, sending the test messages to an E1 conversion module for coding, and sending the test messages through an E1; when at least one of the transmission mode of the test message and the transmission mode set by the dial switch and the destination address of the test message and the dial address in the dial information of the dial switch is different, discarding the test message; here the test message is converted from an ethernet message format to an E1 message format; and the control module also repeatedly sends the last event when no event exists in the queue to be sent.
The control module checks the transmission mode and the destination address of the test message sent by the PHY, and the test message passing the check is stored in the RAM 1; and when the verification fails, discarding the test message.
The E1 conversion module sends the test message to the control module or encodes the test message after the test message passes the verification; and when the verification fails, discarding the test message. The device receives and sends the test message, wherein the Ethernet message format is converted into an E1 message format and an E1 message format is converted into an Ethernet message format; wherein the content of the first and second substances,
as shown in fig. 3, the device converts the test packet from the ethernet packet format to the E1 packet format by the following steps:
step S1, the RJ45 electric port obtains the test message, converts the test message through PHY and sends the test message to the control module; specifically, the device receives a test message in an ethernet message format through an RJ45 electrical port, converts the test message through a PHY, and sends the test message to the control module; step S2, the control module judges whether the transmission mode of the test message is the same as the set transmission mode of the dial switch or not and whether the destination address in the test message is the same as the dial address of the dial switch or not; when the transmission mode of the test message is the same as the transmission mode set by the dial switch and the destination address in the test message is the same as the dial address of the dial switch, executing step S3; when the transmission mode of the test message is different from the transmission mode set by the device, and the destination address in the test message is different from the dial address in the dial information of the device, discarding the test message;
the dialing address is arranged in dialing information, the dialing information also comprises a transmission mode, the dialing information is a binary code, one of the dialing information has 8 bits, the 1 st bit and the 2 nd bit are used for setting the transmission mode, and the 3 rd bit to the 8 th bit are used for setting the dialing address from 1 to 64; the setting is carried out in advance through a dial switch;
the control module judges whether the transmission mode of the test message is the same as the transmission mode in the dial information of the dial switch, specifically, the control module detects whether the first two bits of the dial information of the dial switch are consistent with the transmission mode information in the test message.
Step S3, the control module accumulates the test messages, checks CRC16 and CRC32, extracts the test data in the test messages to be stored in the RAM1 for the test messages passing the check, and the FIFO generates new events according to the storage sequence of the RAM1 and adds the new events to a queue to be sent for queuing; the queue to be sent comprises at least one queued event, and the event comprises the initial address of the test message in the RAM 1; the summation, CRC16 and CRC32 checks are in the prior art and are not limited herein; discarding the test message which fails to pass one of the cumulative sum, the CRC16 and the CRC32 check;
step S4, the control module reads the queue to be sent in FIFO according to the sequence according to the frequency of 0.6k (1.667 ms/frame), and extracts the corresponding test message in RAM1 in sequence according to the initial address of the test message in the event in RAM1 and sends the test message to the E1 conversion module for coding; and when the queue to be sent is not provided with queued events (is empty), repeatedly sending the test message corresponding to the last event to be sent.
And S5, the E1 conversion module encodes the test message, converts the test message through the level conversion module and the isolation transformer, and then sends the test message in the E1 message format through the E1 interface. The method comprises the following specific steps:
step S51, the E1 conversion module carries out CRC16 verification on the test message, and converts the byte state of the test message into a bit state after the verification is passed; when the verification fails, discarding the test message;
step S52, carrying out HDLC coding on the test message of the test message;
s53, carrying out 1B4B coding on the test message after the HDLC coding;
and step S54, carrying out HDB3 coding on the test message after the 1B4B coding, and then sending the test message.
As shown in fig. 3, the device converts the test packet from the E1 packet format to the ethernet packet format by the following steps:
s6, decoding the coded test message after the E1 conversion module receives the coded test message; specifically, a test message in an E1 message format is received through an E1 interface, converted through an isolation transformer and a level conversion module, and then sent to an E1 conversion module for decoding;
step S7, the control module adds a frame head and a frame tail identifier (0x7e) to the test message according to the transmission mode set by the dial switch, then accumulates and verifies the test message, temporarily stores the test message into the RAM2 after the verification is passed, and simultaneously updates the total frame number, the frame length and the cycle number in the RAM 2; when the verification is not passed, discarding the test message;
step S8, the control module generates a sending enabling signal, the initial address of the test message in the RAM2 and the byte length information of the test message at intervals of time t; the time t is 10 ms;
step S9, the control module extracts the corresponding test message from RAM2 according to the transmission enable signal, the initial address of the test message in RAM2 and the byte length information of the test message, adds the destination address, the source address, the message type and the test message length, and simultaneously judges whether the test message length is greater than or equal to 44 bytes, performs CRC32 verification when the test message length is greater than or equal to 44 bytes, and transmits the test message through PHY and RJ45 electric interfaces after the verification is passed; when the verification is not passed, discarding the test message; when the number of bytes is less than 44, filling the tail of the test message to 44 bytes, then performing CRC32 verification, and when the verification is passed, transmitting the test message through PHY and RJ45 electric ports; and when the verification is not passed, discarding the test message. The added source address and destination address are determined by the dial address in the dial information of the protocol conversion device.
Specifically, the end of frame of the test message is padded to add 0x00 at the end of frame, that is, the message is not enough with 44 bytes, and the content added at the end of frame of the message is 0, so as to ensure that the padded message is 44 bytes.
The decoding, performed after the E1 conversion module receives the encoded test packet in step S6, specifically includes:
step S61, carrying out HDB3 decoding on the coded test message;
step S62, carrying out 4B1B decoding on the test message subjected to HDB3 decoding;
step S63, carrying out HDLC decoding on the test message after 4B1B decoding;
step S64, the E1 conversion module converts the decoded test message from bit state to byte state, then CRC16 check is carried out, and step S7 is executed after the check is passed; and when the verification fails, discarding the test message.
The invention transmits the control command of the stability control test system to a plurality of stability control devices by mutually converting the test message between the Ethernet message format and the E1 message format, realizes multi-machine control test, can realize the joint debugging function of the remote main station stability control device and the substation stability control device, improves the efficiency of on-site stability control test, lightens the work load of power grid operation and maintenance personnel, and has important significance for maintaining the reliable operation of the power grid and improving the maintenance efficiency.
Claims (10)
1. A non-transparent protocol conversion method for joint debugging test of a stability control test system is characterized by comprising the following steps: the method comprises the following steps of converting, judging and verifying a test message between an Ethernet message format and an E1 message format, and then sending the test message, wherein:
converting the test message from the Ethernet message format to the E1 message format by the following steps:
step S1, the protocol conversion device obtains the test message;
step S2, the protocol conversion device judges whether the transmission mode of the test message is the same as the transmission mode set by itself and whether the destination address in the test message is the same as the dial address in the dial information of the protocol conversion device; when the transmission mode of the test message is the same as the transmission mode set by the protocol conversion device itself, and the destination address in the test message is the same as the dial address in the dial information of the protocol conversion device, step S3 is executed; when the transmission mode of the test message is different from the transmission mode set by the protocol conversion device and the destination address in the test message is different from the dial address of the protocol conversion device by more than one item, discarding the test message;
the dial information comprises a transmission mode and a dial address;
step S3, the protocol conversion device carries out accumulation and CRC16 and CRC32 verification on the test messages, extracts the test data in the test messages to be checked and stores the test data in the test messages into a memory, generates new events and adds the events to a queue to be sent of the FIFO memory for queuing; the queue to be sent comprises at least one queued event, and the event comprises an initial address of the test message in the RAM;
step S4, the protocol conversion device reads the queue to be sent in the FIFO memory according to the sequence, and extracts the corresponding test message in the memory in sequence to send according to the initial address of the test message in the event in the memory;
step S5, the protocol conversion device sends the test message after encoding the test message;
converting the test message from E1 message format to Ethernet message format, the following steps are adopted:
step S6, decoding the coded test message after the protocol conversion device receives the coded test message;
step S7, the protocol conversion device adds a frame head and a frame tail identifier to the test message according to the transmission mode set by itself, then carries out accumulation and verification, temporarily stores the test message into a memory after the verification is passed, and simultaneously updates the total frame number, the frame length and the cycle number in the memory; discarding the test message when the verification fails;
step S8, the protocol conversion device generates a sending enabling signal, the initial address of the test message in the memory and the byte length of the test message at intervals of t;
step S9, the protocol conversion device extracts the corresponding test message from the memory according to the transmission enable signal, the initial address of the test message in the memory, and the byte length information of the test message, and then adds the destination address, the source address, the message type, and the length of the test message, and then transmits the test message.
2. The non-transparent protocol conversion method for joint debugging test of stability control test system according to claim 1, characterized in that: in step S4, when there is no queued event in the queue to be sent, the test packet corresponding to the last event sent is repeatedly sent.
3. The non-transparent protocol conversion method for joint debugging test of stability control test system according to claim 1, characterized in that: the time t in step S8 is 10 ms.
4. The non-transparent protocol conversion method for joint debugging test of stability control test system according to claim 1, characterized in that: in step S9, after extracting the corresponding test packet from the memory, adding the destination address, the source address, the packet type, and the test packet length, and also determining whether the test packet length is greater than or equal to 44 bytes, performing CRC32 verification when the test packet length is greater than or equal to 44 bytes, and sending the test packet after the verification passes; when the verification is not passed, discarding the test message; when the length of the test message is less than 44 bytes, filling the tail of the test message to 44 bytes, then performing CRC32 verification, and sending the test message after the verification is passed; and when the verification is not passed, discarding the test message.
5. The non-transparent protocol conversion method for joint debugging test of stability control test system according to claim 1, characterized in that: the step S5 includes:
the protocol conversion device carries out CRC16 verification on the test message to be sent, and converts the byte state of the test message into a bit state after the verification is passed; when the verification fails, discarding the test message; then, HDLC coding, 1B4B coding and HDB3 coding are carried out in sequence and then transmitted.
6. The non-transparent protocol conversion method for joint debugging test of stability control test system according to claim 1, characterized in that: the step S6 includes:
carrying out HDB3 decoding, 4B1B decoding and HDLC decoding on the coded test message in sequence; converting the decoded test message from a bit state to a byte state, then performing CRC16 verification, and executing step S7 when the verification is passed; and when the verification fails, discarding the test message.
7. A protocol conversion apparatus, characterized in that: the method comprises the following steps:
the RJ45 electric port is used for receiving and sending test messages in an Ethernet message format;
the E1 interface is used for receiving and sending test messages in an E1 message format;
the PHY is used for converting the test message received through the RJ45 electric port, and sending the test message to the control module or receiving the test message sent by the control module, converting the test message and sending the test message through the RJ45 electric port;
the control module is used for working according to a transmission mode set by the dial switch, receiving a test message sent by the E1 conversion module or the PHY, and executing corresponding operation;
the FIFO storage module is used for generating corresponding events according to the storage sequence of the first storage module and adding the events into a queue to be sent for the control module to call, the queue to be sent comprises at least one event, and the event comprises the initial address of the test message in the first storage module;
the first storage module is used for storing the test message sent by the PHY received by the control module;
the second storage module is used for storing the decoded test message sent by the E1 conversion module and received by the control module;
the clock module is used for providing clock signals required by the control module and the PHY;
the power supply module is used for supplying power to all modules of the device;
the watchdog reset module is used for sending a reset signal to the control module;
the indicator light is used for prompting;
the dial switch is used for setting dial information;
the configuration interface is used for debugging and burning the control module;
the level conversion module is used for converting the voltage;
the isolation transformer is used for signal coupling, electrical isolation and suppression of common mode and differential mode noise;
the E1 conversion module is used for decoding and encoding the test message, and performing E1 decoding and E1 encoding on the test message received by the E1 interface or the test message sent by the control module;
when the control module receives a test message sent by the E1 conversion module, the test message is added with corresponding information according to a transmission mode set by the dial switch and then is checked and temporarily stored in the second storage module, a sending enabling signal, the initial address of the test message in the second storage module and the byte length information of the test message are generated at intervals of t, and according to the sending enabling signal, the initial address of the test message in the second storage module and the byte length information of the test message, the corresponding test message is extracted from the second storage module, and then a destination address, a source address, a message type and the length of the test message are added, and the test message is sent to a PHY after being transcoded and then is sent through an RJ45 interface;
when the control module receives a test message sent by the PHY, whether the transmission mode of the test message is the same as the transmission mode set by the dial switch and whether the destination address of the test message is the same as the dial address in the dial information of the dial switch are judged, when the transmission mode of the test message is the same as the transmission mode set by the dial switch and the destination address of the test message are the same as the dial address in the dial information of the dial switch, the test message is stored in the first storage module, the events in the sending queue are sequentially read according to the events in the queue to be sent in the FIFO storage module, the corresponding test message is sequentially extracted from the first storage module, sent to the E1 conversion module for coding, and then; and when at least one of the transmission mode of the test message and the transmission mode set by the dial switch and the destination address of the test message and the dial address in the dial information of the dial switch is different, discarding the test message.
8. The protocol conversion apparatus according to claim 7, wherein: the E1 decoding comprises the steps that an E1 conversion module carries out HDB3 decoding, 4B1B decoding, HDLC decoding and CRC16 verification on the test message converted by the E1 interface, the isolation transformer and the level conversion module; the E1 encoding comprises the step that the E1 conversion module carries out CRC16 verification, HDLC encoding, 1B4B encoding and HDB3 encoding on the test message sent by the control module.
9. The protocol conversion apparatus according to claim 7, wherein: and the control module also repeatedly sends the last event when no event exists in the queue to be sent.
10. The protocol conversion apparatus according to claim 7, wherein: the control module extracts corresponding test messages from the second storage module according to the transmission enabling signal, the initial address of the test messages in the second storage module and the byte length information of the test messages, adds a destination address, a source address, a message type and the length of the test messages, and simultaneously judges whether the length of the test messages is greater than or equal to 44 bytes, performs CRC32 verification when the length of the test messages is greater than or equal to 44 bytes, and transmits the test messages through PHY and RJ45 electric ports after the verification is passed; when the verification is not passed, discarding the test message; when the number of bytes is less than 44, filling the tail of the test message to 44 bytes, then performing CRC32 verification, and when the verification is passed, transmitting the test message through PHY and RJ45 electric ports; and when the verification is not passed, discarding the test message.
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