Control, protection and power management system for an energy storage system

1. A control, protection and power management system for an energy storage system, comprising:

an interface configured to communicate and provide energy exchange with a host power system, a local load, and the energy storage system; and

processing structure configured to:

receive signals from the host power system and the energy storage system, the signals providing information regarding a condition of the host power system and a condition of the energy system;

identify one of an islanding event and a transient event based on the received signals;

when the islanding event is identified, provide control, protection and power management to the energy storage system, comprising:

detecting one of a first islanding mode, a second islanding mode and an anti-islanding mode, wherein the first islanding mode is detected when the energy storage system and the local load are disconnected from the host power system, the second islanding mode is detected when the energy storage system, the local load and a portion of the host power system comprising one or more transformers are disconnected from the rest of the host power system, and the anti-islanding mode is detected when the energy storage system is disconnected from the host power system; and

overriding internal control of the energy storage system and updating the mode of operation of the energy storage system based at least on the detected islanding mode, the energy storage system comprising a plurality of lithium-ion battery modules, wherein the energy storage system is shut down upon detection of the anti-islanding mode.

2. The control, protection and energy management system of claim 1 wherein upon detection of the first or second islanding modes, the mode of operation of the energy storage system is one of an active mode, an injection mode, an absorption mode, a reactive mode, a filter mode, and an inactive mode.

3. The control, protection and energy management system of claim 2 wherein during operation in the active mode, the energy storage system provides power control.

4. The control, protection and energy management system of claim 2 wherein during operation in the injection mode, the energy storage system injects reactive power into the host power system and charges the batteries.

5. The control, protection and energy management system of claim 2 wherein during operation in the absorption mode, the energy storage system absorbs reactive power from the host power system and discharges the batteries.

6. The control, protection and energy management system of claim 2 wherein during operation in the reactive mode, the energy storage system provides power control.

7. The control, protection and energy management system of claim 2 wherein during operation in the filter mode, the energy storage system operates as an active filter.

8. The control, protection and energy management system of claim 2 wherein during operation in the inactive mode, the energy storage system is inactive.

9. The control, protection and energy management system of claim 1 wherein the host power system comprises a transmission grid and a distribution grid.

10. A method for providing control, protection and power management for an energy storage system, the method comprising:

communicating and providing energy exchange with a host power system, a local load and the energy storage system via an interface;

receiving signals from the host power system and the energy storage system, the signals providing information regarding a condition of the host power system and a condition of the energy storage system;

processing the received signals to identify one of an islanding event and a transient event;

when the islanding event is identified, processing the received signals to determine a mode of operation of the energy storage system and to provide control, protection and power management to the energy storage system, wherein providing control, protection and power management to the energy storage system comprises:

detecting one of a first islanding mode, a second islanding mode and an anti-islanding mode, wherein the first islanding mode is detected when the energy storage system and the local load are disconnected from the host power system, the second islanding mode is detected when the energy storage system, the local load and a portion of the host power system comprising one or more transformers are disconnected from the rest of the host power system, and the anti-islanding mode is detected when the energy storage system is disconnected from the host power system; and

overriding internal control of the energy storage system and updating the mode of operation of the energy storage system based at least on the detected islanding mode, the energy storage system comprising a plurality of lithium-ion battery modules, wherein the energy storage system is shut down upon detection of the anti-islanding mode.

11. The method of claim 10 wherein upon detection of the first or second islanding modes, the mode of operation of the energy storage system is one of an active mode, an injection mode, an absorption mode, a reactive mode, a filter mode, and an inactive mode.

12. The method of claim 11 wherein during operation in the active mode, the energy storage system provides power control.

13. The method of claim 11 wherein during operation in the injection mode, the energy storage system injects reactive power into the host power system and charges batteries of the battery modules.

14. The method of claim 11 wherein during operation in the absorption mode, the energy storage system absorbs reactive power from the host power system and discharges batteries of the battery modules.

15. The method of claim 11 wherein during operation in the reactive mode, the energy storage system provides power control.

16. The method of claim 11 wherein during operation in the filter mode, the energy storage system operates as an active filter.

17. The method of claim 11 wherein during operation in the inactive mode, the energy storage system is inactive.