DE102012218479A1 - Method and system for monitoring the status of a utility network - Google Patents

Method and system for monitoring the status of a utility network

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Publication number
DE102012218479A1
DE102012218479A1 DE102012218479A DE102012218479A DE102012218479A1 DE 102012218479 A1 DE102012218479 A1 DE 102012218479A1 DE 102012218479 A DE102012218479 A DE 102012218479A DE 102012218479 A DE102012218479 A DE 102012218479A DE 102012218479 A1 DE102012218479 A1 DE 102012218479A1
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DE
Germany
Prior art keywords
plc
data
parameter
characterized
parameters
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.)
Pending
Application number
DE102012218479A
Other languages
German (de)
Inventor
Ingo Schönberg
Markus Rindchen
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.)
POWER PLUS COMMUNICATIONS AG, DE
Original Assignee
POWER PLUS COMMUNICATIONS 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
Priority to DE102011089900 priority Critical
Priority to DE102011089900.6 priority
Application filed by POWER PLUS COMMUNICATIONS AG filed Critical POWER PLUS COMMUNICATIONS AG
Priority to DE102012218479A priority patent/DE102012218479A1/en
Publication of DE102012218479A1 publication Critical patent/DE102012218479A1/en
Application status is Pending legal-status Critical

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B3/00Line transmission systems
    • H04B3/54Systems for transmission via power distribution lines
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00007Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using the power network as support for the transmission
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B2203/00Indexing scheme relating to line transmission systems
    • H04B2203/54Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5429Applications for powerline communications
    • H04B2203/5433Remote metering
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/70Systems integrating technologies related to power network operation and communication or information technologies mediating in the improvement of the carbon footprint of electrical power generation, transmission or distribution, i.e. smart grids as enabling technology in the energy generation sector
    • Y02E60/78Communication technology specific aspects
    • Y02E60/7807Communication technology specific aspects characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y02E60/7815Communication technology specific aspects characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using the power network as support for the transmission
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/70Systems integrating technologies related to power network operation and communication or information technologies mediating in the improvement of the carbon footprint of electrical power generation, transmission or distribution, i.e. smart grids as enabling technology in the energy generation sector
    • Y02E60/78Communication technology specific aspects
    • Y02E60/7876Communication technology specific aspects
    • Y02E60/7892Communication technology specific aspects using the power network as support for the transmission
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/10Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by communication technology
    • Y04S40/12Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by communication technology characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/121Using the power network as support for the transmission
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/10Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by communication technology
    • Y04S40/14Communication technology specific aspects
    • Y04S40/146Communication technology specific aspects using power networks as support for transmission

Abstract

A method for monitoring the state of a utility network formed for which the supply network for transmitting electrical energy and for data transmission using a PLC (Power-Line Communication) system comprises, for the most cost-effective yet rapid and early detection of The steps include: repeatedly obtaining at least one parameter from multiple components of the PLC system by means of a data collection unit, the parameters each containing information about the usability of a segment of the utility network for data transmission, storing the parameters obtained by the data collection unit as parameter data, forming a temporal Gradient from the parameter data, determining the state and / or a change in state of the supply network by means of a valuation unit using the time profile of the parameter data. A corresponding system is indicated.

Description

  • The invention relates to a method for monitoring the status of a supply network, wherein the supply network for transmitting electrical energy and for data transmission is formed using a PLC (Power-Line Communication) system. The invention further relates to a corresponding system.
  • Many power supply networks are now reaching the limits of their capacity. One of the reasons for this is the increasing cost pressure on energy providers and, especially in densely populated areas, difficulties in getting approval for the construction of new tracks. On the other hand, the operation of the networks is becoming increasingly critical, as the provision of the required energy for both residential and business customers has an essential meaning. If the power supply fails, the economic damage is quickly very high. Like never before, today's society and its productivity depend on a secure energy supply.
  • By reaching the capacity limits, redundancies are scarcely available in some areas in order to be able to compensate for a fault in the network by alternative supply routes. In urban areas, there is occasionally a ring feed in the medium and low voltage range, where a consumer is fed in a ring via two independent lines. In this way, in principle, one of the two routes fail, without the supply of the consumer is impaired. However, ring feeds are only conditionally usable. For example, consumers need to be sufficiently close to each other to be able to keep the cost of this supply under control. In addition, each of the two routes must be able to transport enough energy for the ring in case of failure. In extreme cases, a track must be able to supply almost all consumers of the ring with energy, otherwise an overload of the ring can threaten.
  • As a cheaper alternative to a redundant connection, it is attempted to keep the supply gap at the consumer as low as possible in case of failure of a route. Due to the large number of connected consumers and decentralized producers, even at the medium and low voltage level, it is necessary to be able to localize and rectify faults in the network as quickly as possible. Only in this way can the economic damage be kept to a minimum.
  • However, complete monitoring of the networks is too costly and too expensive to implement, so that they can be seriously considered. Therefore, in practice, in the event of a fault often the circuit breaker on a failed route are often completely switched off and turned on again in order. Each time a circuit breaker is switched on, an increasing test voltage is applied to the line. If the current increases too much or the circuit breaker switches off automatically, an error can be detected. If the current is within a normal range, the subsegment is evaluated as error-free and the next subsegment is continued. After localization, the error must be corrected before the route can go back into operation. It is obvious that this type of troubleshooting is tedious and valuable time is lost.
  • At the medium voltage level, there are solutions for the remote monitoring of the equipment. However, most of these solutions relate to the "plant" itself, i. the transformers, the associated circuit breakers and their function. The line between them is rarely monitored for cost reasons.
  • The present invention is therefore based on the object, a method and a system of the type mentioned in such a way and further, that an error in a power grid can be detected as early as possible and identified as quickly as possible.
  • According to the invention the above object is solved by the features of claim 1. Thereafter, the method in question is characterized by the steps:
    repeatedly obtaining at least one parameter from several components of the PLC system by means of a data collection unit, the parameters each containing information about the usability of a segment of the supply network for data transmission,
    Storing the parameters obtained by the data collection unit as parameter data,
    Forming a time course from the parameter data,
    Determining the state and / or a state change of the supply network by means of a rating unit using the time profile of the parameter data.
  • With regard to a system, the above object is solved by the features of claim 15. After that, the system in question comprises:
    a data collection unit for repeatedly collecting at least one parameter from a plurality of the PLC components, the parameters each including information about the usability of a segment of the utility network for data transmission,
    a processing unit for storing the parameters obtained by the data collection unit as parameter data and for forming a time history from the parameter data,
    an assessment unit for determining the state and / or a state change of the supply network using the time profile of the parameter data
  • In accordance with the invention, it has first been recognized that it is possible to monitor the state of a supply network at low cost and, in particular, without a dedicated, cost-intensive network monitoring system. Rather, a clever collection of information that has already been determined can provide a comprehensive picture of the state of the supply network. For this purpose, according to the invention, parameters are collected from a PLC (Power-Line Communication) system, which is operated for the transmission of data via the supply network. It has been recognized that many of these parameters reflect an identifiable external influence. In this way, statements about the medium (namely the utility network) on which the BPL system is deployed can be made.
  • A PLC system consists of several PLC components, namely at least two PLC modems, between which data is exchanged, and usually - depending on the length of the route over which the data is to be transmitted - from one or more amplifiers or repeaters. In addition, if necessary, additional components that control the network and / or data streams within the network come. Each of these PLC components determines information about the usability of a segment of the utility network for data transfer as a parameter. In many cases, such a segment is formed by the route to the nearest neighbor (s). This usability information is used to control the transmission devices, for example subchannels used, the type of modulation used in the individual subchannels or the transmission amplification. According to their immediate purpose, namely the maintenance of communication, this information is obtained, evaluated, used and then discarded. A storage does not take place. However, according to the invention, precisely this information is collected as parameters of components of the PLC system.
  • In accordance with the invention, it has been recognized that information about the state of a part of the supply network can be extracted from a time profile of one or more of these parameters. Therefore, according to the invention, at least one of the parameters is obtained from a plurality of PLC components by a data collection unit and processed and / or stored by a processing unit. In particular, the processing unit forms a time profile of the parameter data. Over the course of time, far-reaching information about the condition of the route between two PLC components can be obtained. From several contiguous routes the condition of a larger network of routes can be determined. By evaluating the status information, errors can be detected and even emerging defects can be detected. It is even a certain spatial resolution of the error source feasible. By using this information, the reliability of the supply network can be improved and, in the event of a fault, rapid analysis and troubleshooting can be made possible or at least significantly promoted. There are no additional monitoring devices necessary. Rather, the information already present in the PLC system is collected and evaluated appropriately.
  • The method according to the invention and the system according to the invention can in principle be applied across all layers of the OSI model. Parameters can be generated and used on all layers. Although many of the parameters are attributable to the physical layer (Layer 1: Physical), the link layer (Layer 2: Data Link) or the network layer (Layer 3: Network). However, the other layers can also provide information about the quality of a connection. Thus, for example, a connection termination or a new connection will affect the application layer so that parameters can be extracted there as well.
  • In principle, all components used in a PLC system can function as PLC components. Any PLC component involved in the transmission of data via the PLC system can provide suitable parameters. The PLC component may even be formed by the NMS (Network Management System), which primarily handles management tasks within the PLC network. However, there are also, for example, information about the PLC network structure, end-to-end connections between PLC components and the routing of data that can be used as parameters within the meaning of the invention. A CU (Central Unit) can also be used as a PLC component. In a PLC system, the CU is the PLC component to which a PLC modem of a PLC terminal connects. Examples of other usable PLC components are a PLC modem, a PLC gateway, a PLC repeater or a PLC amplifier.
  • In principle, the method according to the invention and the system according to the invention can be used in connection with a wide variety of PLC systems. However, these are preferably used in a broadband power line system (BPL system).
  • The method according to the invention and the system according to the invention are preferably used in the low-voltage range and in the medium-voltage range.
  • The physical layer of a PLC system is responsible for the physical transmission of the information and thus provides the transmission technology methods available. In all modern PLC systems that use different modulation levels, at least one form of channel estimation is performed. In BPL systems, this is done by means of "pilot tones", which are sent when connecting between two PLC components. This determines which parts of the PLC spectrum can be used for the communication in which way and how good the signal-to-noise ratio (SNR) is. Typical results of this channel estimation are SNR values, which in turn results in the modulation method used (for example BPSQ, QPSK, QAM, 256QAM, etc.). Furthermore, the direct neighbors and the connection of the PLC component to these are identified. In an advantageous embodiment of the invention, parameters obtained via the pilot tones are used in the method according to the invention.
  • In one embodiment of the invention, the SNR is used and evaluated in the PLC spectrum and / or in a sub-channel of the PLC spectrum as a parameter. The SNR value of a connection allows a general statement about the quality of the connection. Modern multicarrier methods such as OFDM (Orthogonal Frequency Division Multiplexing) determine the SNR for each individual carrier. This makes it possible to make a detailed statement about the present disturbances. In this embodiment of the method according to the invention and of the system according to the invention, the SNR values are stored, possibly preprocessed and sent to the processing unit for further storage and interpretation. From this temporal progressions can be created, on the basis of which one the Störverläufe
  • It has been found that high frequency noise, i. Disturbances in the upper part of the PLC spectrum, and their time course indicates an emerging disturbance of the segment of the supply network. With increasing material fatigue or increasing wear, partial discharges increase, which lead to high-frequency disturbances. One of the most important faults which can be detected in this way is called an emerging short circuit. For underground cables, where a ground fault or other type of short circuit occurs creeping, it has been shown, for example, that due to partial discharges high-frequency interference increases and that over time their frequency changes. From the evaluation of the faulty parts of the PLC spectrum and their time course, it is possible to conclude the occurrence of a ground fault.
  • In another embodiment of the invention, the modulation type which is used by a PLC component in a subchannel is evaluated as a parameter. The types of modulation are also referred to as "modulation schemes". The modulation type is usually determined by subcarrier and changes with the ambient noise. With storage of this data, an evaluation can be made, which documents the changes. Many failures, such as partial discharges, can be identified by the generated "nuisance fog" that these disturbances cause. About the timing of this parameter can thus be made a statement about the state of the supply network.
  • In a further embodiment of the invention, the parameters which can be directly accessed by a PLC component (so-called "direct neighbor connections") are used and evaluated as parameters. If a neighbor, i. a further PLC component located in transmission distance of a PLC component, was regularly reachable and a connection to this can now no longer be established, this may indicate an impurity in the supply network. The same applies if the quality of the connection, for example the transferable data rate, decreases significantly.
  • As a special case of the "direct neighbor connections" can be used, which of the possible direct neighbors of a PLC component is actually the next hop on the transmission path. In PLC systems, as with most systems designed for larger extents, a data packet is rarely transmitted directly from a transmitting component to a target component. Rather, one or more PLC component is often involved in the transmission of the transmission of the data packet. Each PLC component that carries the data packet is called a hop. The next hop is the neighbor of a PLC component that transports the data packet. By evaluating the time course of this parameter, a changed routing within the PLC network can be detected. A changed routing can be an indication of a disturbed segment of the supply network.
  • Conversely, "second neighbor information", ie information about the neighbors that have not become the next hop, can be evaluated.
  • A special case of following the routing paths is the so-called CU hopping. In a PLC system, the CU is the PLC component to which a PLC modem of a PLC terminal connects. If a PLC modem has always connected to a particular CU and then the CU changes, this can be an indication of a malfunctioning segment of the utility network.
  • In a further embodiment of the invention, a test signal is actively transmitted to a PLC link and the response is measured, with the test signal being designed as broadband. The data thus obtained can also be used as parameters in the sense of the invention. Broadband in this context means that a significant portion of the PLC spectrum is used by the test signal, whereby the test signal can also use frequency ranges outside the PLC spectrum. As a broadband test signal, a noise signal or a relatively arbitrarily designed signal can be used. In all cases, the test signal can be adapted to the respective test purpose.
  • Preferably, the test signal is formed by an OFDM (Orthogonal Frequency Division Multiplexing) test signal. In this case, a sending PLC component and a receiving PLC component are used to generate and send special test signals. The change of the PLC test signal on the transmission path characterizes the transmission path. These OFDM test signals may differ in their length as well as content from normal OFDM frames. An OFDM test signal may be designed to meet certain requirements. For example, only higher-frequency subchannels in the OFDM test signal can be used to investigate higher-frequency interference. OFDM test signals can be used during operation of the PLC system. Preferably, however, OFDM test signals are used to examine and evaluate segments of the utility network in the event of a utility network failure or maintenance.
  • Advantageously, the impedance of a route and there in particular the access impedance of a PLC modem can be evaluated. To measure the impedance of the track, for example, correlation measurements can be carried out in which the response to a transmission signal is compared with the transmission signal. The transmission signal could be formed, for example, by an OFDM test signal. For example, a change in impedance may indicate an unusually high mechanical load on a ground cable or moisture penetration into the shroud. In the first case, the distances of the individual conductors of the line are changed. In the second case, the impedance is lowered locally. On the other hand, a change in impedance may indicate a disturbance at the connection point. For example, a defect of a contactor may indicate this.
  • In a further embodiment, AFE (Analog Front End) parameters of a PLC component are used. Usually, in each PLC modem of a PLC component, the transmission gain and the reception gain are adapted adaptively to the respective conditions. The adaptive transmit gain can also be used as a parameter as an adaptive receive gain. For example, a creeping increase in transmission amplification may indicate a decreasing connection impedance. Increasing receive gain may be an indication that a PLC signal is becoming increasingly muted in the transmission path. This allows the AFE parameters to be used to draw conclusions about the status of a segment of the supply network.
  • In a still further embodiment of the invention, connection drops in a PLC component are evaluated. An increasing number of disconnections indicates a malfunction of the utility network.
  • In addition, data from the NMS (Network Management System) of the PLC system can be used. For example, the NMS can provide information about the PLC network structure, the end-to-end connections, and the routing of the data. Again, a time course can be formed and conclusions about the state of the supply network can be drawn.
  • Advantageously, the "routing history" can be used. It is thus possible to draw conclusions about the quality of a route from the changes in a routing route. If a route has always been included in a specific route and is no longer used then the change may indicate a fault and an upcoming fault on the route.
  • In a further embodiment of the invention, information from error correction and error handling (for example, renewed querying of a data frame) of a PLC component can be used and evaluated as parameters. The need for error correction indicates that a data frame has been disrupted on the transmission path. Usually such disturbances, which lead to data frames that need to be corrected or even to a request for retransmission, are relatively rare. If error corrections or error treatments are becoming increasingly frequent, it can be concluded that there is a problem in the segment of the supply network.
  • The step of storing the parameters obtained by the data collection unit as parameter data may consist of simply storing the parameters in chronological order. However, preprocessing of the parameters and storage of the preprocessed parameters can also be carried out to generate the parameter data. Thus, for example, a parameter can be extracted from the parameters, which is then stored and kept ready for further evaluation. If, for example, to reduce the data to be kept, the SNR and the modulation type for each individual subchannel should not be stored, a rating scale can be used for the evaluation of a subchannel. According to the evaluation scale, the subchannels would be given a score - a parameter - if a subchannel fulfills certain quality requirements. This parameter can be meaningful enough, so that the storage of all details is not necessary.
  • In order to avoid the inclusion of a scheduled shutdown or failure of a PLC component, such information may be provided to the data collection unit in such cases. The data collection unit would then exclude the corresponding PLC components from the collection of parameters. Alternatively, this information can be made available to the processing unit, which then does not take into account the corresponding PLC component in the time of the failure in the time course.
  • Preferably, the step of polling is done by actively polling the parameters from the PLC components.
  • The monitored utility network typically includes a variety of resources. These may include, for example, cables, cables, transformers or circuit breakers. Particularly preferably, the method according to the invention and the system according to the invention are used to monitor cable runs.
  • Finally, it should be expressly understood that several of the aforementioned embodiments and embodiments can be used in combination. Thus, the use of a parameter may result in a tendency that can be confirmed by information from one or more other parameters. By combining the evaluation of several parameters, the reliability of the monitoring can be increased.

Claims (17)

  1. A method for monitoring the status of a utility network, the utility network for transmitting electrical energy and data transmission using a PLC (Power-Line Communication) system, comprising the steps of: repeatedly obtaining at least one parameter from several components of the PLC system by means of a data collection unit, the parameters each containing information about the usability of a segment of the supply network for data transmission, Storing the parameters obtained by the data collection unit as parameter data, Forming a time course from the parameter data, Determining the state and / or a state change of the supply network by means of a rating unit using the time profile of the parameter data.
  2. A method according to claim 1, characterized in that as parameters results of a channel measurement by means of pilot tones is used.
  3. A method according to claim 1 or 2, characterized in that as a parameter, the SNR (signal-to-noise ratio) is evaluated in the PLC spectrum and / or a sub-channel of the PLC spectrum.
  4. A method according to claim 3, characterized in that is closed at increasing high-frequency interference to an emerging disturbance of a segment of the supply network, in particular an emerging short circuit.
  5. Method according to one of claims 1 to 4, characterized in that is evaluated as a parameter, which type of modulation is used by the PLC component in a sub-channel.
  6. Method according to one of Claims 1 to 5, characterized in that the neighbors that can be directly accessed by a PLC component are evaluated as parameters.
  7. A method according to claim 6, characterized in that is evaluated as a parameter, which reachable neighbor of a PLC components is used for the transmission of data.
  8. Method according to one of claims 1 to 7, characterized in that for obtaining parameters, a broadband test signal is emitted and a response to the test signal is measured, wherein the test signal is preferably adapted for the respective test purpose.
  9. Method according to one of Claims 1 to 8, characterized in that the impedance of a path of the supply network, in particular an access impedance of a PLC component, is evaluated as a parameter.
  10. Method according to one of claims 1 to 9, characterized in that are evaluated as parameters AFE (analog front-end) parameters, wherein the AFE parameters preferably comprise the transmission gain and / or the reception gain.
  11. Method according to one of claims 1 to 10, characterized in that the number of disconnections is evaluated as a parameter.
  12. Method according to one of claims 1 to 11, characterized in that a path is evaluated as a parameter, are exchanged over the data between two PLC components.
  13. Method according to one of claims 1 to 12, characterized in that is evaluated as a parameter information about the need for error correction of a received PLC data packet and / or the necessity of requesting a retransmission of a PLC data packet.
  14. Method according to one of claims 1 to 13, characterized in that extracted in the step of storing from the related parameter data, a characteristic and the characteristic is stored as parameter data.
  15. A system for monitoring the status of a utility network, wherein the utility network is configured to transmit electrical energy and transmit data using a PLC (Power-Line Communication) system, the PLC system consisting of multiple PLC components, the system comprising : a data collection unit for repeatedly collecting at least one parameter from a plurality of the PLC components, the parameters each including information about the usability of a segment of the utility network for data transmission, a processing unit for storing the parameters obtained by the data collection unit as parameter data and for forming a time history from the parameter data, a rating unit for determining the state and / or a state change of the utility network using the time history of the parameter data.
  16. System according to Claim 15, characterized in that a PLC component is provided by a PLC modem, a PLC gateway, a PLC repeater, a PLC amplifier, a central unit (CU) and / or an NMS (Network Management System) is formed.
  17. A system according to claim 15 or 16, characterized in that the PLC system is formed by a broadband power line (BPL) system.
DE102012218479A 2011-12-23 2012-10-10 Method and system for monitoring the status of a utility network Pending DE102012218479A1 (en)

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Application Number Priority Date Filing Date Title
DE102011089900 2011-12-23
DE102011089900.6 2011-12-23
DE102012218479A DE102012218479A1 (en) 2011-12-23 2012-10-10 Method and system for monitoring the status of a utility network

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Application Number Priority Date Filing Date Title
DE102012218479A DE102012218479A1 (en) 2011-12-23 2012-10-10 Method and system for monitoring the status of a utility network
EP20120194232 EP2608417A3 (en) 2011-12-23 2012-11-26 Method and system for monitoring the condition of a supply grid

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DE102012218479A1 true DE102012218479A1 (en) 2013-06-27

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