EP3895270A1 - Operating a load zone on a power grid - Google Patents
Operating a load zone on a power gridInfo
- Publication number
- EP3895270A1 EP3895270A1 EP19727291.7A EP19727291A EP3895270A1 EP 3895270 A1 EP3895270 A1 EP 3895270A1 EP 19727291 A EP19727291 A EP 19727291A EP 3895270 A1 EP3895270 A1 EP 3895270A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- load zone
- load
- current path
- tolerance range
- current
- 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
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/006—Calibration or setting of parameters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/093—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current with timing means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/202—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage for dc systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit 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
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2639—Energy management, use maximum of cheap power, keep peak load low
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
-
- Y—GENERAL 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS 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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
Definitions
- the invention relates to a method and a switching module for operating a load zone on a power network, in particular on a DC network.
- a load zone is understood to mean a single load or an assembly of several loads that can be connected to the power grid in order to be supplied with energy by the power grid and / or to feed energy into the power grid.
- the connection of a load zone to the power grid must be protected against overcurrents that can arise, for example, as a result of a short circuit or an overload.
- the connection could be protected with an overcurrent protection switch, in which a characteristic curve is stored, with which the switching off of the load zone is regulated by triggering the overcurrent protection switch.
- the disadvantage of such a procedure is that switch-off processes can be triggered which would have been avoidable if the parameters had been analyzed more precisely.
- the invention has for its object to enable an egg ner load zone in a power grid, in particular with regard to overcurrent protection.
- the object is achieved by a method with the features of claim 1, a switching module with the features of claim 10 and a power network with the features of claim 13.
- a time window is initially provided and in a set-up operation of the load zone at least one load profile is recorded and stored, which shows a time profile of a load zone current in a load zone with the power grid connecting current path flows, or a load zone voltage between an electrical potential of the current path and a reference potential documented in the time window after the closing of the current path.
- a tolerance range for the time profile of at least one operating parameter of the load zone is defined in the time window on the basis of the at least one load profile.
- the time profile of the at least one operating parameter in the time window after the closing of the current path is then monitored and the current path is opened if the time profile of an operating parameter in the time window after the closing of the current path is outside its tolerance range or leaves its tolerance range.
- the method according to the invention provides, in a set-up operation, to first get to know the behavior of a load zone when it is connected to a power grid, by recording and storing at least one load profile that shows a time profile of a load zone current or a load zone voltage of the load zone in a time window after Documentation of the connection of the load zone to the power grid.
- a tolerance range for the time profile of at least one operating parameter of the load zone is defined in the time window.
- each operating parameter for which a tolerance range has been defined is monitored in the specified time window after switching on and the operation of the load zone is classified as safe if the course of each of these operating parameters is within its range Tolerance remains.
- the load zone is only switched off if the course of an operating parameter in the time window after switching on the load zone is outside its tolerance range or leaves its tolerance range.
- a current strength of the load zone current for example, a current strength of the load zone current, a first derivative of the current strength of the load zone current over time, a level of the load zone voltage or a and a first derivative of the Level of load zone voltage used over time.
- These variables are particularly critical operational parameters of a load zone when the load zone is connected to a power grid and are therefore particularly suitable for defining tolerance ranges.
- a time period of less than 100 ys is specified as the time window. This takes into account the fact that load peaks typically only occur within a very short time interval of less than 100 ys after a load zone has been connected to a power grid and therefore tolerance ranges only need to be defined for this short time interval.
- the current path is opened and closed with an electronic switching unit. This advantageously enables the load zone to be disconnected from the power grid very quickly in the event that the time profile of an operating parameter after the load zone has been connected to the power grid is outside its tolerance range or leaves its tolerance range.
- At least one tolerance range compatible with a safe operating area of the electronic switching unit is preferably defined. Furthermore, it can be provided to detect a temperature of the electronic switching unit and to define at least one tolerance range depending on the temperature of the electronic switching unit.
- a safe operating area is usually defined as an area in a current-voltage diagram for a current flowing in the electronic switching unit and a voltage applied to the electronic switching unit and is therefore particularly suitable for defining a tolerance range for one of the above-mentioned operating parameters (Current strength of the load zone current, level of the load zone voltage and its first derivatives over time).
- the compatibility of the tolerance range with the safe operating area of the electronic switching unit advantageously prevents the electronic switching unit from being damaged or destroyed by load peaks when the load zone is connected to the power supply system.
- Defining a tolerance range as a function of a temperature of the electronic switching unit advantageously enables the influence of the temperature on the functional of an electronic switching unit when defining the tolerance range.
- the electronic switching unit is set up to open and close a current path between the load zone and the power grid and can be controlled by the control unit.
- the measuring unit is designed to detect a time profile of a load zone current flowing in the current path or / and a time profile of a load zone voltage between an electrical potential of the current path and a reference potential in a predetermined time window after the current path has been closed.
- the storage unit is set up to store at least one load profile recorded by the measuring unit, which documents a time profile of the load zone current or the load zone voltage in the time window after the current path has been closed in a set-up operation of the load zone.
- the evaluation unit is set up to use the at least one load profile to define a tolerance range for the time profile of at least one operating parameter of the load zone in the time window.
- the evaluation unit can be set up to define at least one tolerance range compatible with a safe operating area of the electronic switching unit.
- the control unit is set up to monitor the time profile of each operating parameter, for which a tolerance range is defined, in normal operation of the load zone and to open the current path by actuating the switching unit if the time profile of an operating parameter in the time window after the closing of the Current paths are outside its tolerance range or leave its tolerance range.
- the switching module can also have a temperature sensor that is set up to detect a temperature of the electronic switching unit, and the evaluation unit can be set up to define at least one tolerance range as a function of the temperature of the electronic switching unit.
- a switching module according to the invention enables the method according to the invention to be carried out with the advantages already mentioned above.
- a power network according to the invention has a switching module according to the invention and can in particular be a direct current network.
- FIG. 1 shows a block diagram of an exemplary embodiment of a switching module according to the invention, by means of which a load zone is connected to a power network,
- FIG. 3 shows a flowchart of an exemplary embodiment of a method according to the invention for operating a load zone on a power grid.
- FIG. 1 shows a block diagram of an embodiment of a switching module 1 according to the invention, through which a load zone 3 is connected to a power grid 5.
- the power network 5 is a direct current network with two main electrical lines 7, 9 which are different from one another
- the load zone 3 has two load Z ones lines 11, 13 which are protected by the circuit module 1 are respectively connected to a main pipe 7. 9
- the switching module 1 has two network-side connections 15, 16, two load zone-side connections 17, 18, a controllable electronic switching unit 19, a measuring unit 21, a storage unit 23, an evaluation unit 25, a control unit 27 and a temperature sensor 29.
- the network-side connection 15 is connected to the main line 7.
- the network-side connection 16 is connected to the main line 9.
- the load zone side connection 17 is connected to the load zone line 11.
- the load zone-side connection 18 is connected to the load zone line 13.
- the switching unit 19 is between the network side An
- the switching unit 19 can be controlled by the control unit 27.
- IGBT insulated-gate bipolar transistor
- MOSFET metal-oxide-semiconductor field-effect transistor
- the measuring unit 21 is adapted to a time curve of a current flowing in the current path 20 load zone current, and a time characteristic of a load zone clamping voltage in a pre give NEN time window T after the closing of the current path 20, the ones lines between the load Z 11, bears 13, to capture. For example, a time duration that is less than 100 ys is specified as the time window T.
- the storage unit 23 is set up to store at least one load profile detected by the measuring unit 21, which shows a time profile of the load zone current or the load zone voltage in the time window T after the closing of the
- the evaluation unit 25 is set up to use the at least one load profile to define a tolerance range 33 for the time profile of at least one operating parameter C of the load zone 3 in the time window T.
- Each tolerance range 33 is defined in particular in such a way that it is compatible with a safe operating area of the electronic switching unit 19.
- the evaluation unit 25 can be set up to define the at least one tolerance range 33 as a function of a temperature of the electronic switching unit 19.
- an operating parameter C or operating parameters C is relation ship as, for example, a current intensity of the current flowing in the current path 20 load zone stream, a first derivative of the current of this load zone current according to the time t, zone voltage a height of the ones lines between the load Z 11, 13 applied load and / or a first derivative of the level of this load zone voltage used after the time t.
- the control unit 27 is set up in a normal operation of the load zone 3 to monitor the time profile of each operating parameter C, for which a tolerance range 33 is defined, and to open the current path 20 by actuating the switching unit 19 if the time profile is one Be operating parameter C in the time window T after the closing of the current path 20 is outside its tolerance range 33 or leaves its tolerance range 33.
- the temperature sensor 29 is set up to detect a temperature of the electronic switching unit 19.
- FIG. 2 shows a diagrammatic representation of a tolerance range 33 for a profile of an operating parameter C, in this case, for example, the current strength of the load zone current flowing in the current path 20, as a function of the time t in the time window T after the current path 20 has been closed
- Tolerance range 33 is limited by a lower limit 35 and an upper limit 36, which are determined taking into account the safe operating area of the electronic switching unit 19.
- FIG. 3 shows a flow chart of an exemplary embodiment of a method according to the invention with method steps S1 to S4 for operating the load zone 3 on the power grid 5 by means of the switching module 1 shown in FIG. 1.
- a time window T is specified.
- a second method step S2 in a set-up operation of the load zone 3, at least one load profile is recorded with the measuring unit 21 and stored with the storage unit 23, each load profile showing a time profile of a load zone current flowing in the current path 20 or a load zone voltage, Z between the load ones lines 11, 13 is applied, in the time window T after the closing of the current path 20 documented.
- the evaluation unit 25 uses the at least one load profile to define a tolerance range 33 for the time profile of at least one operating parameter C of the load zone 3 in the time window T.
- Each tolerance range 33 is defined in particular in such a way that it is compatible with a safe operating area of the electronic switching unit 19, and can also be dependent on a temperature of the electronic switching unit 19.
- unit 19 can be defined.
- an operating parameter C or Be operating parameters C for example, a current of the current flowing in the current path 20 zone current, a first derivation of the current of this load zone current after the time t, a level of the zone zone load lines 11, 13 present and / or one first derivative of the level of this load zone voltage used after the time t.
- a fourth step S4 in a normal operation of the load zone 3 in the time window T after the closing SEN of the current path 20 to the measuring unit 21, the load zones current flowing in the current path 20, and the load zone clamping voltage, the ones lines Z between the load 11, 13 is present in
- the control unit 27 monitors the time profile of each operating characteristic variable C, for which a tolerance range 33 was defined in the third method step S3, in the time window T after the current path 20 has been closed, and the current path 20 is opened when the time history expires an operating parameter C in the time window T after the closing of the current path 20 is outside its tolerance range 33 or leaves its tolerance range 33.
- the fourth method step S4 is carried out again each time the current path 20 is closed in a normal operation of the load zone 3.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19153437 | 2019-01-24 | ||
PCT/EP2019/061666 WO2020151840A1 (en) | 2019-01-24 | 2019-05-07 | Operating a load zone on a power grid |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3895270A1 true EP3895270A1 (en) | 2021-10-20 |
Family
ID=65228417
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19727291.7A Pending EP3895270A1 (en) | 2019-01-24 | 2019-05-07 | Operating a load zone on a power grid |
Country Status (4)
Country | Link |
---|---|
US (1) | US20220102965A1 (en) |
EP (1) | EP3895270A1 (en) |
CN (1) | CN113491047A (en) |
WO (1) | WO2020151840A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020128445A1 (en) | 2020-10-29 | 2022-05-05 | Jürgen Winkler | Intelligent security device for a power supply |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT509251A1 (en) * | 2009-08-14 | 2011-07-15 | Fronius Int Gmbh | 4 EXPERTS IN THE FIELD OF ARC FLASH IN PHOTOVOLTAIC PLANTS AND ONE SUCH PHOTOVOLTAIC PLANT |
FR2977677B1 (en) * | 2011-07-04 | 2013-08-23 | Commissariat Energie Atomique | DETECTION OF ELECTRIC ARCS IN PHOTOVOLTAIC FACILITIES |
FR3002645B1 (en) * | 2013-02-22 | 2016-09-09 | Commissariat Energie Atomique | METHOD AND DEVICE FOR DETECTING ELECTRIC ARC IN A PHOTOVOLTAIC INSTALLATION |
US10338142B2 (en) * | 2014-06-30 | 2019-07-02 | Elmos Semiconductor Ag | Faulty load detection for multi-phase electric motor |
JP6235429B2 (en) * | 2014-07-31 | 2017-11-22 | 株式会社東芝 | Three-phase power transmission protection method and apparatus |
-
2019
- 2019-05-07 WO PCT/EP2019/061666 patent/WO2020151840A1/en unknown
- 2019-05-07 CN CN201980093148.5A patent/CN113491047A/en active Pending
- 2019-05-07 EP EP19727291.7A patent/EP3895270A1/en active Pending
- 2019-05-07 US US17/424,930 patent/US20220102965A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
US20220102965A1 (en) | 2022-03-31 |
WO2020151840A1 (en) | 2020-07-30 |
CN113491047A (en) | 2021-10-08 |
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