Granted Patent B2

US 12,470,093 · App. 18/557,175 · Granted Nov 11, 2025

Inventors: Bernhard Deck (Weilheim, DE); Stephan Gerspach (Herrischried, DE); Michele Luvisotto (Västerås, SE)

Assignee: HITACHI ENERGY LTD

H02J50/90H02J50/80H04W64/00

Abstract

Claims (42)

1 . A monitoring system for an electrical network, comprising one or both of a transmission network or distribution network, the monitoring system comprising:

a short-range wireless transceiver arranged at a predetermined position relative to an equipment device of the electrical network and configured to receive a signal from a portable device; and

a controller configured to determine a location of the portable device based at least partially on the received signal and to verify if the determined location is within a predetermined alert zone at least partly surrounding the equipment device;

wherein the controller is further configured to

receive information indicating whether the equipment device is energised or de-energised, and

generate an alert signal in case the determined location is verified to be within the alert zone and the equipment device is energised.

2 . The monitoring system according to claim 1 , wherein the short-range wireless transceiver is configured to transmit the alert signal to the portable device.

3 . The monitoring system according to claim 1 , wherein the controller is configured to transmit the alert signal to a safety block mechanism.

4 . A monitoring system for an electrical network, comprising one or both of a transmission network or distribution network, the monitoring system comprising:

a short-range wireless transceiver arranged at a predetermined position relative to an equipment device of the electrical network and configured to receive a signal from a portable device; and

a controller configured to determine a location of the portable device based at least partially on the received signal and to verify if the determined location is within a predetermined alert zone at least partly surrounding the equipment device;

wherein the controller is further configured to

generate an alert signal in case the determined location is verified to be within the alert zone, and

transmit the alert signal to a safety block mechanism, wherein the safety block mechanism is configured to either cause the equipment device to enter a safe mode in response to receipt of the alert signal, or prevent the equipment device from being energised in case the alert signal is received.

5 . The monitoring system according to claim 3 , wherein the safety block mechanism is configured to prevent the equipment device from being energised in case the alert signal is received.

6 . The monitoring system according to claim 1 , wherein the controller is configured to determine the location of the portable device based on a determined distance between the portable device and the short-range wireless transceiver, and further on determined directional information of the signal from the portable device.

7 . The monitoring system according to claim 6 , wherein the short-range wireless transceiver comprises an array of antennas allowing for the directional information to be determined as angle of arrival of the signal from the portable device.

8 . The monitoring system according to claim 1 , wherein the portable device is arranged in a garment or a personal protective accessory.

9 . A monitoring system for an electrical network, comprising one or both of a transmission network or distribution network, the monitoring system comprising:

a short-range wireless transceiver arranged at a predetermined position relative to an equipment device of the electrical network and configured to receive a signal from a portable device; and

a controller configured to determine a location of the portable device based at least partially on the received signal and to verify if the determined location is within a predetermined alert zone at least partly surrounding the equipment device;

wherein the controller is further configured to generate an alert signal in case the determined location is verified to be within the alert zone, and

wherein the controller is comprised in the short-range wireless transceiver.

10 . The monitoring system according to claim 1 , comprising a plurality of short-range wireless transceivers, each of which being configured to receive the signal from the portable device, and further being communicatively connected to the controller.

11 . The monitoring system according to claim 10 , wherein the controller is configured to determine the location of the portable device by means of triangulation between two or more of the short-range wireless transceivers.

12 . The monitoring system according to claim 10 , wherein the controller is further configured to track movement of the portable device and store the movement in a database.

13 . The monitoring system according to claim 1 , wherein the equipment device forms part of a first substation of the electrical network, and wherein the controller is configured to share the determined location with a control system of a second substation.

14 . A monitoring method, comprising:

by a transceiver, receiving a signal from a portable device;

determining a location of the portable device relative to an alert zone at least partly surrounding an equipment device of an electrical network, comprising one or both of a transmission network or distribution network, wherein the location is determined at least partially on the received signal and a predetermined position of the transceiver relative to the equipment device;

verifying if the determined location is within the alert zone;

receiving information indicating whether the equipment device is energised or de-energised; and

generating an alert signal in case the determined location is within the alert zone and the equipment device is energised.

15 . The monitoring method according to claim 14 , further comprising, by the transceiver, transmitting the alert signal to the portable device.

16 . A monitoring method, comprising:

by a transceiver, receiving a signal from a portable device;

determining a location of the portable device relative to an alert zone at least partly surrounding an equipment device of an electrical network, comprising one or both of a transmission network or distribution network, wherein the location is determined at least partially on the received signal and a predetermined position of the transceiver relative to the equipment device;

verifying if the determined location is within the alert zone;

generating an alert signal in case the determined location is within the alert zone; and

transmitting the alert signal to a safety block mechanism that is configured to either cause the equipment device to enter a safe mode in response to receipt of the alert signal, or prevent the equipment device from being energised in case the alert signal is received.

17 . The monitoring method according to claim 14 , further comprising transmitting the alert signal to a safety block mechanism that is configured to prevent the equipment device from being energised in case the alert signal is received.

18 . The monitoring method according to claim 14 , further comprising determining the location of the portable device based on a determined distance between the portable device and the transceiver, and further on determined directional information of the signal from the portable device.

Assignments (3)

Priority Claims (1)

Continuity (1)

References Cited (113)