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1. (WO2019025780) NETWORK MANAGEMENT
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CLAIMS

1. A distributed and decentralized control system for a power network, the control system comprising:

at least one monitoring device or constraint controller for monitoring, determining or measuring at least one parameter of one or more points on the power network; and

one or more device controllers for controlling at least one device connected or connectable to the power network; wherein

the at least one monitoring device or constraint controller is configured to broadcast or transmit a request or objective that depends on the parameter or a condition of the one or more points on the power network derived therefrom; and the one or more device controllers are configured to retrieve or receive the broadcast or transmitted request or objective and to implement logic to determine a control action for the at least one device at least partially based on the request or objective;

such that the monitoring, determining and measuring of the parameters of the one or more points on the power network is physically and logically decoupled or separated from the control of the devices.

2. The control system of claim 1 , wherein the at least one point on the network is a constraint point.

3. The control system according to claim 1 or claim 2, wherein the device controller is configured to determine the control action and/or how to control the at least one device based on the request or objective, one or more other requests or objectives received from at least one other of the monitoring devices and a condition of the at least one device.

4. The control system according to any preceding claim, wherein the request or objective specifies one or more of: reducing the value of the at least one parameter of the one or more points on the power network, increasing the value of the at least one parameter of the one or more points on the power network, releasing control of at least one of the devices, and/or fail safe or other safe condition.

5. The control system according to any preceding claim, wherein the monitoring device or constraint controller is configured to implement a control algorithm for determining the condition of the point on the network from a plurality of possible conditions.

6. The control system of claim 5, wherein the monitoring device or constraint controller is configured to send different requests or objectives for different determined conditions and/or the requests or objectives may be indicative of a corresponding determined condition.

7. The control system according to any preceding claim, wherein the request or objective is for the one or more points on the network and does not specify an operation or target parameter value for the at least one device that is connected or connectable to the power network.

8. The control system according to any preceding claim, wherein the device controller is configured to receive requests or objectives from a plurality of different monitoring devices or constraint controllers for corresponding different points on the power network and arbitrate and/or otherwise take into account the requests or objectives from the plurality of different monitoring devices or constraint controllers in determining the control action for the at least one device.

9. The control system according to any preceding claim, wherein the request comprises a priority and the device controller is configured to determine how to control the at least one device associated with the controller at least partially based on the priority of the request and/or the priority of the one or more other requests received from the at least one other of the monitoring devices.

10. The control system according to any preceding claim, wherein the device controller is configured to determine which of the at least one devices to control and/or how to control the at least one device associated with the device

controller based on a policy or control strategy that specifies which devices to control and/or how and/or when to control the devices.

1 1. The control system of claim 10, wherein the policy or control strategy specifies which devices to control and/or how and/or when to control the devices based on one or of: the priority of at least one or more or each signal received; the identity, type or other property of the monitoring device(s) from which the signal was received; the identity, type or other property of the one or more points on the power network associated with or monitored by the monitoring device(s) from which the signal was received; and/or the rate of change or ramp rate of the parameter.

12. The control system according to any preceding claim, wherein the at least one device is at least one device that has an effect greater than a predetermined minimum effect on the one or more points on the power network.

13. The control system according to any preceding claim, wherein the at least one monitoring device or constraint controller is physically separated, remote and distinct from the one or more device controllers.

14. The control system according to claim 13, wherein the at least one monitoring device or constraint controller is provided at the respective points on the network and the one or more device controllers are provided at or in the devices that are remote from the constraint controllers.

15. The control system according to any preceding claim, wherein the at least one monitor is configured to broadcast or transmit the request or objective over a communications network or bus and one or more or all of the device controllers are configured to receive the request or objective via the communications network or bus.

16. The control system according to claim 15, configured to implement a publish- subscribe communications protocol, wherein the at least one monitor publishes the request or objective by broadcasting it and the one or more device controllers are configured to subscribe to requests or objectives.

17. The control system according to claim 15 or claim 16, wherein the communications network or bus comprises a request queue and the monitoring devices are configured to broadcast or transmit the request or objective by issuing the request or objective to the request queue and one or more or all of the device controllers are configured to retrieve and/or consume the requests or objectives from the request queue.

18. The control system according to any preceding claim, wherein the monitoring system is operated by one vendor or operator while the device controller is operated by a different vendor or operator.

19. The control system according to any preceding claim, wherein the one or more device controllers are configured to determine the control actions without reference to a model of the full network.

20. A power network comprising the control system of any of claims 1 to 19, and at least one device receiving power from or providing power to the power network, the at least one device being controlled or controllable by the device controller of the control system.

21. A monitoring device or constraint controller for monitoring, determining or measuring at least one parameter of one or more points on a power network, the monitoring device or constraint controller comprising, and/or being configured to receive data from, one or more data providing sensors for measuring or monitoring the one or more points on the power network;

the data comprising values of the one or more parameters and/or the monitoring device or constraint controller being configured to determine the values of the one or more parameters from the data; wherein

the monitoring device or constraint controller is configured to determine a request or objective based on the values of the one or more parameters

and/or a condition of the one or more points on the power network derived therefrom, and to broadcast or transmit the request or objective.

22. The monitoring device of claim 21 , wherein the monitoring device is configured to broadcast the request or objective over a data network or bus to a request queue.

23. A device controller configured to:

receive or retrieve at least one request or objective that was broadcast or transmitted by one or more monitoring devices or constraint controllers;

determine a control scheme, action or command for controlling one or more devices connected to an power network based on the received request(s) or objective(s); and

control the at least one devices based on the determined control scheme, action or command.

24. A method of operating a distributed and decentralized control system for a power network, the method comprising:

monitoring, determining or measuring at least one parameter of one or more points on the power network using at least one monitoring device;

using the at least one monitoring device, broadcasting or transmitting a request or objective based and/or dependent on the at least one measured or monitored parameter and/or a condition of the one or more points on the power network derived therefrom;

retrieving or receiving the signal using the at least one device controller; and controlling the at least one device using one or more device controllers based on the request or objective.

25. A computer program or computer program product configured such that when run on a processing system causes the processing system to implement the method of claim 24.