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1. WO2020136617 - AN ENERGY MANAGEMENT SYSTEM AND METHOD OF A ROV

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[ EN ]

CLAIMS

1. An energy management system of a ROV, the system comprising :

- an electrical power generation unit (1) located in a remote station (2) on a water body (3) and configured to generate a generated electrical power (PI) with a first maximum value (PM1);

- a wire-guided ROV (4) configured to operate in the water body (3) and configured to absorb a second maximum value (PM2) of an absorbed electrical power (P2) greater than the first maximum value (PM1);

- an electrical energy transmission line (6) connected to the generating unit (1) and to the ROV (4) and configured to transmit electrical power from the generating unit (1) to the ROV ( 4 ) ; and

- an electrical energy storage device (7) located along the transmission line (6) and/or on board the ROV (4) .

2. The system as claimed in Claim 1, wherein the storage device (7) is selected from one or more rechargeable batteries (7b); one or more capacitors (7c) preferably super capacitors; or one or more rechargeable batteries (7b) and one or more capacitors (7c) preferably super capacitors.

3. The system as claimed in claim 1 or 2, wherein the storage device (7) is configured to deliver a third maximum value (PM3) of electrical power equal to the difference between the second maximum value (PM2) and the first maximum value (PM1) to compensate for the difference between the absorbed power (P2) and the generated power (PI) .

4. The system as claimed in any of the previous claims, wherein the storage device (7) is placed on board the ROV

(4) .

5. The system as claimed in any of the previous claims, wherein the transmission line (6) comprises an intermediate station (10) ; an umbilical (11) connected to the generating unit (1) and intermediate station (10) ; and a flexible cable (12) connected to the intermediate station (10) and to the ROV (4) ; where the umbilical (11) is configured to transmit an amount of electrical power equal to the first maximum value ( PM1 ) .

6. The system as claimed in claim 5, wherein the storage device (7) is placed on the intermediate station (10) .

7. The system as claimed in claim 6, wherein the storage device (7) comprises a first storage block (7g) on board the intermediate station (10) and a second storage block (7h) on board the ROV (4), preferably the first storage block (7g) comprises one or more rechargeable batteries (7b) and the second storage block (7h) comprises one or more rechargeable batteries (7b), e.g. fast charge and discharge, and/or one or more capacitors (7c), in particular super capacitors.

8. The system as claimed in any of the previous claims, wherein the first maximum value (PM1) is equal to the average value calculated over a selected time interval value between 5 and 60 minutes of absorbed electrical power (P2) depending on the type of use.

9. The system as claimed in any of the previous claims, wherein the energy storage device (7) is modular and is configured so that the number of batteries and/or capacitors can be varied according to the intended use of the ROV (4) .

10. The system as claimed in any of the previous claims, comprising an electrical energy management device (14) connected to the storage device (7) and the generating unit (1); the management device (14) being configured to selectively supply the ROV (4) on the basis of a command signal (S2) received from a control unit (20) and related to the request for instantaneous absorbed electrical power (P2) from the ROV (4) in a first operating mode, according to which the generating unit simultaneously supplies both the ROV (4) and the storage device (7) ; and in a second operating mode, according to which the generating unit (1) and the storage device (7) simultaneously supply the energy to the ROV (4) .

11. A method of managing the energy of a ROV, the method comprising the phases of:

- generating electrical power through an electrical power generation unit (1) having a first maximum value (PM1) of generated electrical power (PI) and placed in a remote station (2) on a water body (3);

- absorbing through the ROV (4) a second maximum value (PM2) of absorbed electrical power (P2), in which the first maximum value (PM1) is lower than the second maximum value ( PM2 ) ;

- transmitting electrical energy from the generating unit (1) to the ROV (4) via an electrical energy transmission line ( 6 ) ; and

- accumulating or delivering electrical energy through an electrical energy storage device (7) located along the transmission line (6) and/or on board the ROV (4) in order to compensate for the difference between the absorbed electrical power (P2) and the generated electrical power (PI) .

12. The method as claimed in claim 11, wherein the storage device (7) is configured to deliver a third maximum value (PM3) of electrical power equal to the difference between the second maximum electrical power (PM2) and the first maximum electrical power (PM1) to compensate for the difference between the absorbed power (P2) and the generated power ( PI ) .

13. The method as claimed in claim 11 or 12, and comprising the step of configuring the first maximum value (PM1) of the generating unit (1) equal to an average value calculated over a selected time interval between 5 and 60 minutes of the electrical power absorbed (P2) by the ROV (4) depending on the type of use of the ROV (4) .

14. The method as claimed in any of the claims from 11 to 13, where the storage device (7) is modular and is configured so that the number of batteries and/or capacitors can be varied according to the intended use of the ROV (4) .

15. The method as claimed in any of the claims from 11 to 14, comprising the phase of selectively supplying the ROV (4) according to a command signal (SI) received from a control unit (20) and related to the instantaneous absorbed electric power (P2) request from the ROV (4) in a first operating mode, according to which the generating unit (1) simultaneously delivers electrical power to both the ROV (4) and the storage device (7); and in a second operating mode, according to which the generating unit (1) and the storage device (7) simultaneously deliver power to the ROV (4) .