EP1886433A1 - Transmission redondante de telegrammes de donnees pour la technique d'automatique industrielle de systemes hgu - Google Patents

Transmission redondante de telegrammes de donnees pour la technique d'automatique industrielle de systemes hgu

Info

Publication number
EP1886433A1
EP1886433A1 EP05753539A EP05753539A EP1886433A1 EP 1886433 A1 EP1886433 A1 EP 1886433A1 EP 05753539 A EP05753539 A EP 05753539A EP 05753539 A EP05753539 A EP 05753539A EP 1886433 A1 EP1886433 A1 EP 1886433A1
Authority
EP
European Patent Office
Prior art keywords
counter
telegram
data
receiving unit
receiving
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05753539A
Other languages
German (de)
English (en)
Inventor
Anja Ackermann
Michael Festor
Frank Greiner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1886433A1 publication Critical patent/EP1886433A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1835—Buffer management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1858—Transmission or retransmission of more than one copy of acknowledgement message

Definitions

  • the invention relates to a method for securely transmitting data telegrams between at least one transmitting unit and at least one receiving unit of a HVDC system, each transmitting unit being connected to each receiving unit via at least two connecting channels, in which each data telegram is provided with a telegram counter uniquely identifying the data telegram and each transmitting unit transmits the data telegram to each receiving unit via all the connecting channels, the telegram counter being calculated with an incrementing rule which is clocked by the sending of the data telegrams and each receiving unit is clocked using the same incrementing rule which is clocked by the reception of data telegrams. calculated a comparison counter.
  • transmitting and receiving unit prior art HVDC systems are connected via redundant connection channels, of which in normal operation a connection channel used as a default preferred channel and another connection channel is used as a non-active default operation alternative channel.
  • the transmitting unit When sending data telegrams, the transmitting unit enters a telegram counter into each data telegram which uniquely identifies the data telegram.
  • the receiving unit calculates a comparison counter or acknowledgment counter using the same incrementation rule and then transmits the comparison counter back to the transmitter.
  • the transmitter compares the telegram counter with the comparison counter. If there is a match, ie in the case of a positive comparison, the message counter is increased with the aid of the incrementing rule, and a new data message is sent to the receiving unit with the increased message counter. Until a match between the telegram counter and the comparison counter, the transmitting unit sends data telegrams of the same content. If no positive comparison is reached within the previously defined period of time, an error message is output and the system switches to the alternative channel.
  • the previously known method has the disadvantage that dead times of up to 10 seconds can arise in an accident. Due to the constantly reflected comparison counter, there is also an increased transmission time of current data.
  • the invention is therefore based on the object to provide a method of the type mentioned above, which allows faster data exchange between transmitting and receiving units of a HVDC system and at the same time meets the increased security requirements of such a system.
  • each transmitting unit already stores data telegrams stored in a transmission buffer and that the receiving unit compares the telegram counter of each received data telegram with the comparison counter, which in case of a mismatch between telegram counter and comparison counter or in the absence of a match within a waiting period
  • Receiving a data telegram a repeat request to the transmitting unit for sending a data telegram is sent to the comparison counter corresponding telegram counter accesses the transmitting unit after receiving the repeat request to the send buffer and sends the data telegram on all connection channels whose telegram counter corresponds to the received by the repeat request comparison counter ,
  • the comparison between telegram counter and comparison counter is no longer performed solely by the transmitting unit.
  • a time-consuming mirroring of each telegram counter of a data telegram by the receiving unit with the addition of the comparison counter is eliminated according to the invention. In this way, the speed of the transmission of data telegrams is considerably increased. Furthermore, the load on the connection channels is reduced.
  • the receiving unit compares telegram counter and comparison counter to match. Only when there is no match is the sending of a repeat request to the transmitting unit. The transmitting unit searches the transmission buffer set up in it for data telegrams which have a telegram counter which matches the comparison counter of the repeat request.
  • a repeat request is transmitted from the receiver unit to the transmitter unit only if there is no match.
  • a repeat request is sent when the receiving unit misses a data telegram. This means that, after receiving a data telegram, which does not immediately follow the last received data telegram in the given clock sequence, but according to the incremental rule, for example, the after the next data telegram, a repeat request is sent for the immediately following or next data telegram.
  • the repeat request is sent before the next but one data telegram is received, if a configurable waiting time has elapsed after the reception time of the last received data telegram.
  • the waiting period expediently ends shortly before the possible reception of the next but one data telegram.
  • the repeat request is expediently repeated continuously at fixed time intervals until the receiving unit receives a data telegram whose telegram counter corresponds to the comparison counter of the repeat request.
  • the repeat request is repeated only twice.
  • the receiving unit rejects the reception of data telegrams whose telegram counter corresponds to that already received data telegrams.
  • the setting up of a preferred bus and an alternative bus used only in case of need has become superfluous.
  • the connection channels are rather equally used, whereby it is of no importance to the receiving unit via which connection channel it receives a data telegram. The use or rejection of the received data telegram depends solely on whether a positive comparison between the telegram counter of the received data telegram has already taken place or not.
  • At least two transmitting units are provided, the same data telegrams with the same Send telegram counters.
  • the transmission units are designed to be redundant, so that if one transmission unit fails, the second or replacement transmission unit can take over the function of the failed transmission unit.
  • each receiving unit being set up for sending repeat requests.
  • the receiving units are designed redundantly with increased reliability of the HVDC system in the wake.
  • each receiving unit stores the received data telegrams in a receiving buffer.
  • the receiving buffer is for example a so-called first-in first-out memory, wherein the received data telegrams are stored as a function of their telegram counter in the receiving buffer.
  • This has the advantage that when a data packet is missing or in other words when a repeat request is sent, reception of other data telegrams can continue even before the missing data telegram is received.
  • the data telegram received as a result of a repeat request is then subsequently classified in the address of the memory kept free for it.
  • the evaluation of the data takes place in chronological order. In this way the speed of the data exchange is increased.
  • the addressing of memory locations by means of pointers or the like is well known to the person skilled in the art, so that at this point it need not be discussed in more detail.
  • the storage capacity of the send buffer is configurable. In this way, the process is fast and easy easily adaptable to the most diverse requirements in high-voltage direct current transmission.
  • the data message is sent by means of a connectionless and acknowledgment-free transmission protocol.
  • a transmission protocol is, for example, the UDP broadcast protocol.
  • the UDP broadcast protocol is known to the person skilled in the art, so that it need not be discussed in more detail here.
  • Connectionless and acknowledgment-free protocols have the advantage that they allow a particularly fast data transmission, whereby the successful connection of the connection is not checked by the protocol.
  • a TCP / IP protocol is used to transmit the data telegrams.
  • the TCP / IP protocol is an acknowledged and connection-oriented program.
  • Figure is a schematic representation of a
  • FIG. 1 shows schematically a connection network 1 of an HVDC system.
  • the HVDC system has a number of redundant protective devices Ia, Ib or control devices 2a, 2b, which are used to control the components of an inverter station, not shown, an HVDC system.
  • the first of a terstation associated components of the interconnection network 1 are provided with the reference numeral 3.
  • Each protective device is connected via a redundant connection channel 4a and 4b to a likewise redundantly configured operating station 5a or 5b.
  • the operator stations 5a and 5b each have a screen unit 6.
  • the connection channels 4a and 4b further comprise so-called switches 7 and routers 8, which simplify addressing during data exchange.
  • the components of the interconnection network 3 assigned to the first converter station are connected to the components 10 of the interconnection network 1 via a connecting line 9a and 9b, which is shown very briefly here, but in practice longer and redundantly designed, which are assigned to a second converter station of the HVDC system.
  • the second converter station comprises the first converter station according to redundant protective devices Ia and Ib or control units 2a and 2b, which are connected via connection channels 4a and 4b again with operating station 5a and 5b.
  • the data exchange between the operator stations 5a and, for example, the protective device Ia takes place by means of a UDP broadcast protocol.
  • the operating station 5a appears as a transmitting unit.
  • the operator station has an internal logic which converts manually entered control commands of a user into a data telegram.
  • a telegram counter which is incremented by the number 1 by the outside of a data telegram, is added.
  • the telegram is then sent from the operating station 5a via the connecting channel 4a and via the connecting channel 4b to the receiving unit in the form of the protective device Ia.
  • the protective device Ia has, after receiving In the previous data telegram, a comparison counter, which is incremented according to the same incrementation rule as the telegram counter of the operator station, is increased.
  • the data telegram is received via the connection channel 4a in front of the content-identical data telegram of the connection channel 4b.
  • the protective device Ia compares the telegram counter of the data telegram with the comparison counter. These matched, whereupon the protection device Ia stores the data telegram in the receive buffer for further processing.
  • the data exchange is completed.
  • the protection device 1a receives the data telegram via the undisturbed data channel 4b.
  • the protective device 1a receives a data telegram whose telegram counter is increased by two incrementation steps or more compared with the last telegram counter received by the protective device 1a , The protection device then sends a repeat request to the operator station 5a, the repeat request having the comparison counter which corresponds to the message counter of the data message that has not been received. After receiving the repeat request, the operating station 5a accesses a send buffer in which the recently sent data telegrams are buffered as a function of the comparison counter received with the repeat request.
  • the operator station 5a again sends a data telegram whose telegram counter corresponds to the comparison counter of the repeat request to the receiving unit in the form of the protective device Ia.
  • the communication of the protection devices Ia, Ib and the control unit is based on a TCP / IP protocol.

Abstract

L'invention concerne un procédé de transmission sûre de télégrammes de données entre au moins une unité d'émission (5a) et au moins une unité de réception (1a) d'une installation HGU. Chaque unité d'émission (5a) est reliée à chaque unité de réception (5a) par au moins deux canaux de communication (4a, 4b). Chaque télégramme de données est doté d'un compteur de télégramme caractérisant le télégramme de données de manière univoque et chaque unité d'émission (5a) envoie le télégramme de données à chaque unité de réception (1a) par tous les canaux de communication (4a, 4b). Le compteur de télégramme est calculé avec une règle d'incrémentation qui est cadencée par l'envoi des télégrammes de données. Chaque unité de réception (la) calcule un compteur de comparaison en utilisant la même règle d'incrémentation qui est cadencée par la réception de télégrammes de données. L'invention vise à créer un tel procédé qui permette un échange de données plus rapide entre une unité d'émission et une unité de réception d'une installation HGU tout en étant satisfaisant aux exigences de fiabilité d'une telle installation. A cet effet, chaque unité d'émission (5a) mémorise déjà des télégrammes de données envoyés dans un tampon d'émission et l'unité de réception compare le compteur de télégramme de chaque télégramme de données reçu au compteur de comparaison. Lors d'une coïncidence erronée du compteur de télégramme et du compteur de comparaison, une demande de répétition est envoyée à l'unité d'émission (5a) pour envoyer un compteur de télégramme correspondant au compteur de comparaison. Après la réception de la demande de répétition, l'unité d'émission (5a) accède au tampon d'émission et envoie le télégramme de données dont le compteur de télégramme correspond au compteur de comparaison reçu par la demande de répétition, par tous les canaux de communication (4a, 4b).
EP05753539A 2005-06-02 2005-06-02 Transmission redondante de telegrammes de donnees pour la technique d'automatique industrielle de systemes hgu Withdrawn EP1886433A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE2005/001025 WO2006128398A1 (fr) 2005-06-02 2005-06-02 Transmission redondante de telegrammes de donnees pour la technique d'automatique industrielle de systemes hgu

Publications (1)

Publication Number Publication Date
EP1886433A1 true EP1886433A1 (fr) 2008-02-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05753539A Withdrawn EP1886433A1 (fr) 2005-06-02 2005-06-02 Transmission redondante de telegrammes de donnees pour la technique d'automatique industrielle de systemes hgu

Country Status (5)

Country Link
US (1) US8065580B2 (fr)
EP (1) EP1886433A1 (fr)
CN (1) CN101194454A (fr)
DE (1) DE112005003659A5 (fr)
WO (1) WO2006128398A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103368680B (zh) * 2012-03-27 2017-11-24 深圳富泰宏精密工业有限公司 减轻at通道负载的系统及方法
CN103970009A (zh) * 2014-04-30 2014-08-06 南京南瑞继保电气有限公司 一种在直流输电系统中进行冗余单元发送的数据选择方法
EP2985948B1 (fr) * 2014-08-14 2018-07-11 Siemens Aktiengesellschaft Procédé d'échange de télégrammes entre deux participants en communication
CN110915155B (zh) 2017-05-16 2021-11-30 日立能源瑞士股份公司 一种高压直流hvdc电力系统及其通信网络
CN113665632B (zh) * 2021-08-23 2024-04-02 中车南京浦镇车辆有限公司 一种适用于无人驾驶列车的紧急牵引方法

Family Cites Families (7)

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Publication number Priority date Publication date Assignee Title
US3876979A (en) * 1973-09-14 1975-04-08 Gte Automatic Electric Lab Inc Data link arrangement with error checking and retransmission control
EP0876023A1 (fr) 1997-04-30 1998-11-04 Sony Corporation Emetteur et procédé de transmission, récepteur et procédé de réception, et émetteur/récepteur et procédé de transmission/réception
US6327688B1 (en) * 1998-08-07 2001-12-04 Analog Devices, Inc. Data bus with automatic data integrity verification and verification method
DE19927639A1 (de) 1999-06-17 2000-12-21 Bosch Gmbh Robert Verfahren zur wiederholten Übertragung von Nachrichten in einem zentral gesteuerten Kommunikationsnetz
EP1204249A4 (fr) 2000-06-23 2007-05-16 Mitsubishi Electric Corp Procede et systeme de retransmission de paquets
US6925096B2 (en) * 2000-09-22 2005-08-02 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for managing traffic flows
DE10249592A1 (de) 2002-10-24 2004-06-17 Abb Research Ltd. Datenverarbeitungsknoten für ein Leitsystem

Non-Patent Citations (1)

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Also Published As

Publication number Publication date
CN101194454A (zh) 2008-06-04
WO2006128398A1 (fr) 2006-12-07
DE112005003659A5 (de) 2008-05-21
US20080178056A1 (en) 2008-07-24
US8065580B2 (en) 2011-11-22

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