WO2003098767A2 - Dispositif de protection d'un reseau de distribution d'energie electrique - Google Patents
Dispositif de protection d'un reseau de distribution d'energie electrique Download PDFInfo
- Publication number
- WO2003098767A2 WO2003098767A2 PCT/FR2003/001465 FR0301465W WO03098767A2 WO 2003098767 A2 WO2003098767 A2 WO 2003098767A2 FR 0301465 W FR0301465 W FR 0301465W WO 03098767 A2 WO03098767 A2 WO 03098767A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- network
- discrimination system
- protection device
- varistor
- spark gap
- Prior art date
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
- H02H3/44—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 the rate of change of electrical quantities
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/06—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/042—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage comprising means to limit the absorbed power or indicate damaged over-voltage protection device
Definitions
- the present invention relates to a device for protecting an electrical energy distribution network against transient overvoltages.
- the present invention relates to a device (2, 102, 202, 302) for protecting an electrical energy distribution network (1, 201) against transient overvoltages, comprising a discrimination system (4, 204) capable of measuring in the network the rate of change of the voltage as a function of time and, if the latter is greater than a predetermined value, to put this network in electrical connection with at least one conductive component (5, 205) connected to earth (3 , 203).
- the present invention also relates to a device for protecting (202, 302) a network (1, 201) for distributing electrical energy against transient overvoltages, comprising a discrimination system (4, 204) capable of measuring in the network. the rate of change of the voltage as a function of time and, if the latter is greater than a predetermined value, to put this network in electrical connection with at least one varistor (205) connected to earth (3, 203).
- Electric power distribution networks can be the site of two main types of overvoltages.
- transient overvoltages which are mainly created by lightning strikes on or near electrical lines and installations, the duration of which is of the order of a few tens or hundreds of microseconds, and the amplitude of which can exceed ten kilovolts.
- temporary overvoltages which are due to faults in the network, in particular following the transmission to the low voltage network of faults occurring in the medium voltage network, the duration of which can vary from several milliseconds to several minutes, and the amplitude of which does not exceed 1500 volts for a 230/400 volt network.
- the purpose of the electrical network protection devices is to protect the latter against transient overvoltages, temporary overvoltages, due to their low amplitude, being compatible with the dielectric strength of the connected equipment and materials. It is therefore undesirable for the protective devices to be triggered in the event of a temporary overvoltage, since direct short-circuiting to earth can have damaging consequences.
- the protection devices belonging to the state of the art meet this condition by triggering, for a 230/400 volt network, only from an overvoltage threshold greater than 1500 volts corresponding to the maximum amplitude d '' a temporary overvoltage.
- an overvoltage threshold greater than 1500 volts corresponding to the maximum amplitude d '' a temporary overvoltage.
- the overvoltage has already reached values of the order of 2500-3000 volts and can generate significant damage.
- a protection device comprises a discrimination system able to measure in the network the rate of change of the voltage as a function of time and, if the latter is greater than a predetermined value, to put this network in electrical connection with at least one conductive component connected to earth.
- the rate of change of the voltage as a function of time is respectively of the order of 10 7 to 10 8 volts per second in the case of a transient overvoltage, and of 10 6 volts per second in the case of a temporary overvoltage of frequency 50 Hertz whatever its duration .
- the discrimination system which constantly measures the du / dt in the network, is then able, when the du / dt is greater than this predetermined value, to put said network in electrical connection with at least one conductive component connected to earth.
- This protection device therefore remains inactive in the case of a temporary overvoltage, and has the advantage of being triggered before the transient overvoltage is effective in the network, which allows clipping as soon as the threshold value is exceeded. in the network.
- the discrimination system comprises a low-pass filter.
- the latter can be achieved using electronic components analog, of the resistor and capacitor type, but also by digital signal processing methods known to those skilled in the art.
- each conductive component is constituted by a spark gap provided with a priming electrode connected to the discrimination system.
- the spark gap therefore comprises, in addition to its main electrodes, generally two in number, at least one additional ignition electrode which can be activated, preferably directly, by the discrimination system.
- the discrimination system and the spark gap are connected in series.
- the discrimination system and the spark gap are mounted in parallel.
- each conductive component consists of a varistor.
- each varistor is connected to a switching device controlled by the discrimination system, this switching device possibly consisting of a thyristor or any other sufficiently rapid switching means.
- the discrimination system and the varistor are connected in series.
- the discrimination system and the varistor are mounted in parallel.
- FIG. 1 is a comparative diagram representing the evolution over time of a nominal voltage 50 Hertz, a temporary overvoltage and a transient overvoltage.
- FIG. 2 is a schematic view of an electrical circuit in which is integrated a protection device according to the invention comprising a discrimination system and a spark gap mounted in series.
- FIG. 4 is a schematic view of an electrical circuit in which is integrated another protection device according to the invention comprising a discrimination system and a varistor connected in series.
- Figure 5 is similar to Figure 4, with the only difference that the discrimination system and the varistor are mounted in parallel.
- the invention relates to a device (2, 102, 202, 302) for protecting an electrical energy distribution network (1, 201) against transient overvoltages, comprising a discrimination system (4, 204) capable of measuring in the network the rate of change of the voltage as a function of time and, if the latter is greater than a predetermined value, to put this network in electrical connection with at least one conductive component (5, 205) connected to earth (3, 203), characterized in that said at least one conductive component consists of a spark gap (5) provided with a priming electrode (8) connected to the discrimination system (4).
- the invention also relates, independently or in combination, to a device (202, 302) for protecting a network (1, 201) of electrical energy distribution against transient overvoltages, comprising a discrimination system (4, 204) able to measure in the network the rate of change of the voltage as a function of time and, if the latter is greater than a predetermined value, to put this network in electrical connection with at least one varistor (205) connected to earth (3, 203), characterized in that the discrimination system (204) and the varistor (205) are mounted in parallel.
- a first curve A of constant amplitude materializes the evolution of the nominal voltage 50 Hertz over time.
- This curve A has vertices 100 which are all less than the value 1500 volts.
- a second curve B corresponds to the evolution of a temporary voltage over time.
- This curve B is also of constant amplitude but it has vertices 200 slightly greater than the value 1500 volts.
- a third curve C materializes the evolution over time of a temporary overvoltage. It is then possible to note that such a temporary overvoltage is very brief in time, but that it presents a peak 300 source of damage greatly exceeding the value 1500 volts.
- the electrical circuit shown schematically in Figure 2 comprises a 230/400 volt network, consisting of a cable 1 distributor of electrical energy, to which is connected a protection device 2 according to the invention connected to earth 3. More precisely, the protective device 2 is constituted by a discrimination system 4 and a spark gap 5 both mounted in series, the spark gap 5 being directly connected to the ground 3.
- the discrimination system 4 contains an analog low-pass filter (not shown), and l the spark gap 5 comprises, on the one hand, two electrodes 6, 7, and on the other hand, a priming electrode 8 electrically connected to the discrimination system 4.
- the analog low-pass filter is chosen to be on only when the rate of change of the voltage as a function of time (du / dt) measured in the cable 1 is greater than or equal to a predetermined value of 10 7 volts per second , that is to say when the du / dt definitely corresponds to a transient overvoltage. Consequently, as long as the measured du / dt is less than this predetermined value, the protection device 2 remains inactive.
- the analog low-pass filter detects in the cable 1 a du / dt greater than this predetermined value, the latter delivers a voltage pulse which is transmitted to the spark gap 5 by means of the priming electrode 8. The latter then gives rise to an auxiliary arc making it possible to ionize the environment surrounding the electrodes 6, 7, which causes the spark gap 5 to ignite. It should be noted that this voltage pulse could also be sent to the ignition electrode 8 via an amplifier. Furthermore, to obtain this ionization, it could also be envisaged to use a light source or a laser source controlled by the discrimination system 4 in place of the ignition electrode 8.
- the electrical circuit shown schematically in Figure 3 differs from that shown in Figure 2 only in that the discrimination system 4 and the spark gap 5 are mounted in parallel, the discrimination system 4 then being also connected to the earth 3.
- the operation of protection device 102 remains similar to that described above.
- the electrical circuit represented in FIG. 4 comprises a 230/400 volt network, constituted by a cable 201 distributing electrical energy, to which is connected a protection device 202 according to the invention connected to earth 203.
- the protection device 202 includes a discrimination system 204 containing an analog low-pass filter (not shown) and a varistor 205 connected in series, the varistor 205 being connected to earth 203.
- a switching device 210 advantageously constituted by a thyristor controlled by the discrimination system 204, is also provided. This switching device 210 can only be turned on when the discrimination system 204 has detected a du / dt greater than the predetermined value in the cable 201.
- the analog low-pass filter detects in the cable 201 a du / dt greater than the predetermined value, the latter acts on the thyristor so that it authorizes the electrical connection of the varistor 205 with the cable 201.
- the varistor 205 is then subjected to the tension of the cable 201 and makes it possible to avoid any damage that may be generated by the transient overvoltage.
- the electrical circuit shown schematically in Figure 5 differs from that shown in Figure 4 only in that the discrimination system 204 and the varistor 205 are connected in parallel, the discrimination system 204 then also being connected to earth 203.
- the operation of this protection device 302 remains similar to that described above.
- a protection device (not shown) according to the present invention constituting a variant of the protection devices 202, 302 can comprise a reverse logic discrimination system.
- the varistor is permanently in the electrical circuit and it is only disconnected during a temporary overvoltage.
- the discrimination system must therefore be triggered when the overvoltage measured in the network has a sufficiently low growth rate to guarantee that it is indeed a temporary overvoltage and not a temporary overvoltage.
- the varistor is therefore less protected against aging, but in the event of a failure of the discrimination system, we are left with a conventional protection device.
- the switching device which must allow the disconnection of the varistor no longer needs to be as fast, and it is then possible to choose a current component and inexpensive such as an electromechanical relay.
- the invention finds its industrial application in the design and manufacture of surge protection devices.
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03752806A EP1512208A2 (fr) | 2002-05-14 | 2003-05-14 | Dispositif de protection d'un reseau de distribution d'energie electrique |
AU2003258759A AU2003258759A1 (en) | 2002-05-14 | 2003-05-14 | Device for protecting an electric power distribution network |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR02/05907 | 2002-05-14 | ||
FR0205907A FR2839822B1 (fr) | 2002-05-14 | 2002-05-14 | Dispositif de protection d'un reseau de distribution d'energie electrique |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2003098767A2 true WO2003098767A2 (fr) | 2003-11-27 |
WO2003098767A3 WO2003098767A3 (fr) | 2004-03-25 |
Family
ID=29286465
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2003/001465 WO2003098767A2 (fr) | 2002-05-14 | 2003-05-14 | Dispositif de protection d'un reseau de distribution d'energie electrique |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1512208A2 (fr) |
AU (1) | AU2003258759A1 (fr) |
FR (1) | FR2839822B1 (fr) |
WO (1) | WO2003098767A2 (fr) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5995352A (en) * | 1994-11-29 | 1999-11-30 | Erico Lightning Technologies Pty. Ltd. | Ignition apparatus and method |
EP1058366A2 (fr) * | 1999-06-02 | 2000-12-06 | Eaton Corporation | Circuit de suppression des surtensions sensible à la vitesse de changement des perturbations de l'alimentation |
-
2002
- 2002-05-14 FR FR0205907A patent/FR2839822B1/fr not_active Expired - Fee Related
-
2003
- 2003-05-14 EP EP03752806A patent/EP1512208A2/fr not_active Withdrawn
- 2003-05-14 WO PCT/FR2003/001465 patent/WO2003098767A2/fr not_active Application Discontinuation
- 2003-05-14 AU AU2003258759A patent/AU2003258759A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5995352A (en) * | 1994-11-29 | 1999-11-30 | Erico Lightning Technologies Pty. Ltd. | Ignition apparatus and method |
EP1058366A2 (fr) * | 1999-06-02 | 2000-12-06 | Eaton Corporation | Circuit de suppression des surtensions sensible à la vitesse de changement des perturbations de l'alimentation |
Also Published As
Publication number | Publication date |
---|---|
EP1512208A2 (fr) | 2005-03-09 |
AU2003258759A1 (en) | 2003-12-02 |
WO2003098767A3 (fr) | 2004-03-25 |
FR2839822B1 (fr) | 2004-08-27 |
FR2839822A1 (fr) | 2003-11-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2384750C (fr) | Dispositif de protection contre les surtensions | |
EP1709717B1 (fr) | Dispositif de protection contre les surtensions avec eclateurs en parallele a declenchement simultane | |
EP0205149B1 (fr) | Dispositif de protection d'une ligne électrique d'énergie contre des surtensions transitoires élevées | |
EP1792378A1 (fr) | Dispositif de protection contre les surtensions a capacite de coupure du courant de fuite amelioree | |
EP0296054B1 (fr) | Dispositif de protection d'un équipement électronique contre les fortes impulsions élecromagnétiques, notamment dues à la foudre | |
FR2955986A1 (fr) | Dispositif de deviation de surcharges de courant ou de surtensions transitoires | |
EP3399612B1 (fr) | Liaison électrique comprenant un dispositif de protection électrique - polarisation en courant | |
EP0228321B1 (fr) | Procédé de protection contre la foudre, moyens pour la mise en oeuvre de ce procédé et matériel de protection contre la foudre | |
EP1102371A1 (fr) | Dispositif parafoudre pour réseau à basse tension | |
EP1944848B1 (fr) | Dispositif et procédé de mesure de courant de foudre | |
FR2991117A3 (fr) | Protecteur contre les tensions transitoires dues a la foudre | |
FR3073660A1 (fr) | Liaison electrique comprenant un dispositif de protection electrique. | |
EP1887667B2 (fr) | Dispositif d'amorçage à deux électrodes pour éclateur et procédés correspondants | |
WO2003098767A2 (fr) | Dispositif de protection d'un reseau de distribution d'energie electrique | |
FR2997196A1 (fr) | Circuit de test de disjoncteur haute tension a courant continu | |
EP2792040A1 (fr) | Parafoudre tripolaire integre dans une passerelle residentielle avec detecteur d'impact de foudre | |
FR3067514A1 (fr) | Liaison electrique comprenant un dispositif de protection electrique - test d'integrite | |
EP1628378B1 (fr) | Dispositif de protection contre les surtensions a eclateurs en parallele | |
EP1628377B1 (fr) | Dispositif de protection d'installations électriques contre les surtensions pourvu d'un éclateur associé à un circuit de pré-déclenchement | |
EP0909000B1 (fr) | Dispositif de protection d'une batterie de condensateurs | |
EP1153464B1 (fr) | Dispositif parafoudre pour installations electriques de forte puissance | |
FR2917940A1 (fr) | Electrificateur de cloture electrique | |
FR2904497A1 (fr) | Protection d'une ligne de communication | |
FR2552599A1 (fr) | Dispositif de protection contre les courts-circuits pour un circuit integre et une charge raccordee a celui-ci | |
EP3561973A1 (fr) | Dispositif de protection configuré pour permettre une circulation d'un courant de décharge |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A2 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SC SD SE SG SK SL TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A2 Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2003752806 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 2003752806 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: JP |
|
WWW | Wipo information: withdrawn in national office |
Country of ref document: JP |