Traitement en cours

Veuillez attendre...

Paramétrages

Paramétrages

Aller à Demande

1. WO2019122041 - PROCÉDÉ DE SURVEILLANCE À DISTANCE DE SECTIONNEURS DE PARASURTENSEUR DÉFAILLANT ET DE RÉCUPÉRATEUR D'ÉNERGIE POUR ALIMENTATION AUTONOME DE DISPOSITIFS DE SURVEILLANCE INSTALLÉS SUR DES PARASURTENSEURS

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

1. A method of remotely monitoring a status of a surge arrester disconnector via a long- range wireless mesh communication system (300; 400; 500; 600) of surge arrester disconnectors (301 ; 401 ; 501 ; 601 ) organized in clusters (320; 420; 520; 620), each cluster including disconnectors that are physically located within a same cluster area, at least one of the disconnectors in each cluster being coupled to communication means of a predetermined communication range (310; 410; 510; 610) for transmitting a signal indicative of the disconnector status, the method comprising:

transmitting, from a first cluster (320-a; 420-a; 520-a; 620-a), a status signal indicative of a status of a first disconnector (301 -1 ; 401 -1 ; 501 -1 ; 601 -1 ) in the first cluster (320-a; 420-a; 520-a; 620-a) to a second cluster (320-b; 420-b; 520-b; 620-b) located within the predetermined communication range from the first cluster (320-a; 420-a; 520-a; 620-a);

consecutively transmitting the status signal from the cluster that receives said signal to an adjacent cluster within the predetermined communication range, until reaching an end cluster (320-c; 420-c; 520-c; 620-c) on the long-range mesh communication system;

transmitting, from the end cluster, the status signal to a monitoring station (340; 440; 540; 640); and

monitoring the status of the first disconnector (301 -1 ; 401 -1 ; 501 -1 ; 601 -1 ), at the monitoring station (340; 440; 540; 640), based on a result of transmission of the status signal.

2. A method according to claim 1 , wherein

absence of reception of said status signal is indicative of the first disconnector (301 -1 ; 401 -1 ; 501 -1 ; 601 -1 ) having operated to disconnect the respective surge arrester from ground.

3. A method according to claim 1 or 2, wherein the status signal is transmitted from any of the clusters via low-power high-speed radio communications.

4. A method according to any one of claims 1 to 3, wherein at least one of the clusters (320-a; 420-a; 520-a; 620-a) includes a disconnector coupled to respective communication means and configured to act as a cluster head (301 -4; 401 -3; 501 -2; 601 -3), the cluster head receiving status signals from disconnectors (301 -1 to 301 -3; 401 -1 , 401 -2; 501 -1 ; 601 -1 , 601 -2) included in the same cluster and transmitting the

status signals to an adjacent cluster (320-b; 420-b; 520-b; 620-b) within the predetermined communication range.

5. A method according to claim 4, further comprising:

for each cluster (320; 420; 520; 620), randomly selecting a disconnector from the disconnectors (301 -1 to 301 -3; 401 -1 , 401 -2; 501 -1 ; 601 -1 , 601 -2) coupled to respective communication means that are included in the same cluster for acting as the cluster head; and

when it is detected that a cluster head of a cluster is not communicating, automatically selecting an operative disconnector from the disconnectors (301 -1 to 301 -3; 401 -1 , 401 - 2; 501 -1 ; 601 -1 , 601 -2) coupled to respective communication means that are included in the same cluster as the respective cluster head.

6. A method according to claim 4 or 5, wherein each cluster includes a cluster head, the transmitting of the status signals between adjacent clusters being performed via the respective clusters heads.

7. A method according to any one of claims 1 to 6, wherein

the status signal of the first disconnector (301 -1 ; 401 -1 ; 501 -1 ; 601 -1 ) is transmitted directly between adjacent clusters that are separated from each other by a distance of substantially the predetermined communication range; and/or

the status signal of the first disconnector (301 -1 ; 401 -1 ; 501 -1 ; 601 -1 ) is transmitted between adjacent clusters that are separated from each other by more than the predetermined communication range via a repeater (650).

8. A method of detecting a failed surge arrester from a monitoring station (340; 440; 540;

640) remote to the surge arrester, the surge arrester being connected in series with a disconnector configured to automatically disconnect the surge arrester from ground in case of a failure, the method comprising:

collecting charge from a leakage current that flows from the surge arrester to ground via the disconnector and storing the collected charge in a storage capacitive element;

powering a monitoring device and/or a communication device installed at the surge arrester using the charge stored in the storage capacitive element; and

monitoring reception of a signal transmitted from the monitor device and/or the communication device at the remote monitoring station (340; 440; 540; 640),

wherein absence of reception of said signal is indicative of the disconnector having operated to disconnect the surge arrester from ground.

9. Energy harvester apparatus for harvesting energy from a leakage current of a surge arrester, comprising:

first and second input terminals (802, 804) adapted to be coupled in series with the surge arrester and ground potential to collect the leakage current that flows from the surge arrester; and

an energy storage circuit (810) comprising a storage capacitor (812) adapted to store charge from the collected leakage current and to supply the stored charge, via first and second output terminals (814, 816) coupled to the storage capacitor (812), to an electronic device.

10. Energy harvester apparatus according to claim 9, further comprising

a first over-voltage protection arrangement (820) coupled across the first and second input terminals and adapted to establish a bypass path when a transient voltage above a first threshold is applied across the first and second input terminals.

1 1 . Energy harvester apparatus according to claim 10, wherein

the first over-voltage protection arrangement comprises a spark gap circuit adapted to establish said bypass path when said transient voltage is above a breakdown voltage.

12. Energy harvester apparatus according to claim 10 or 1 1 , further comprising:

a second over-voltage protection arrangement (850) coupled in parallel to the first level of over-voltage protection arrangement and adapted to establish a bypath to ground when the transient voltage rises above a second threshold, the second threshold being lower than the first threshold.

13. Energy harvester apparatus according to claim 12, wherein

the second over-voltage protection arrangement comprises a transient-voltage- suppression diode adapted to bypass the transient current to ground.

14. Energy harvester apparatus according to any one of claims 9 to 13, further comprising: a capacitive rectifier arrangement (840) coupled to the at least one over-voltage protection arrangement to rectify a current output by the over-voltage protection arrangement and to supply the rectified current to the energy storage circuit.

15. Energy harvester apparatus according to any one of claims 9 to 14, wherein

the energy storage circuit further comprises a current sensing circuit adapted to sense a current received by the energy storage circuit.