초록 ▼

A control system for an energy storage device is coupled to sensors on an electrical grid. The control system is configured to receive a measurement from each of the sensors. The control system determines, based on the received measurements, whether a grid event is a local event or a distributed eve

A control system for an energy storage device is coupled to sensors on an electrical grid. The control system is configured to receive a measurement from each of the sensors. The control system determines, based on the received measurements, whether a grid event is a local event or a distributed event. The control system selects a response mode for controlling the energy storage device based on whether the grid event is determined to be a local event or a distributed event.

대표청구항 ▼

1. A system comprising: an energy storage device coupled to an electrical grid;a plurality of sensors coupled to the electrical grid, the electrical grid comprising a plurality of metering nodes at different geographic locations, each sensor being coupled to a metering node;a control system coupled

1. A system comprising: an energy storage device coupled to an electrical grid;a plurality of sensors coupled to the electrical grid, the electrical grid comprising a plurality of metering nodes at different geographic locations, each sensor being coupled to a metering node;a control system coupled to the energy storage device and the sensors, wherein the control system is configured to:receive a measurement from each of the sensors;determine, based on the received measurement, whether a grid event is a local event or a distributed event; andselect a response mode for controlling the energy storage device based on whether the grid event is determined to be a local event or a distributed event;wherein determining whether a grid event is a local event or a distributed event comprises calculating a difference between a first phase angle at a first sensor of the plurality of sensors and a second phase angle at a second sensor of the plurality of sensors, and, if the difference exceeds a threshold, determining that the grid event is a distributed event. 2. The system of claim 1, wherein the control system is configured to: determine that a first grid event is a local event, and in response, cause the energy storage device to inject or absorb active power at a first rate to compensate for the first grid event; anddetermine that a second grid event is a distributed event, and in response, cause the energy storage device to inject or absorb active power at a second rate greater than the first rate to compensate for the second grid event. 3. The system of claim 1, wherein determining whether the grid event is a local event or a distributed event further comprises counting a number of sensors reporting the grid event, and, if the number of sensors is greater than a threshold number of sensors, determining that the grid event is a distributed event. 4. The system of claim 1, wherein the system is configured to determine that the grid event has occurred by determining that at least a first sensor has reported a reduction in a measured electrical parameter of the grid. 5. The system of claim 4, wherein determining that at least a first sensor has reported the reduction in the measure electrical parameter comprises determining that the first sensor has reported the reduction in the measured electrical parameter for at least a threshold period of time. 6. The method of claim 4, wherein determining whether the grid event is a local event or a distributed event further comprises: receiving location information from each of the sensors; anddetermining whether the grid event is a local event or a distributed event based on the location information. 7. The method of claim 6, wherein determining whether the grid event is a local event or a distributed event based on the location information further comprises: counting a first number of sensors of a first location reporting the grid event;counting a second number of sensors of a second location reporting the grid event;determining a difference between the first number of sensors and the second number of sensors; anddetermining that the grid event is a local event if the difference is less than or equal to a threshold difference and determining that the grid event is a distributed event if the difference is greater than the threshold difference. 8. A system comprising: an energy storage device coupled to an electrical grid;a plurality of sensors coupled to the electrical grid, the electrical grid comprising a plurality of metering nodes at different geographic locations, each sensor being coupled to a metering node;a control system coupled to the energy storage device and the sensors, wherein the control system is configured to:receive a measurement from each of the sensors;determine, based on the received measurement, whether a grid event is a local event or a distributed event; andselect a response mode for controlling the energy storage device based on whether the grid event is determined to be a local event or a distributed event;wherein determining whether the grid event is a local event or a distributed event comprises: determining a first power flow from a first sensor of the plurality of sensors to a second sensor of the plurality of sensors;comparing the first power flow with a recorded power flow from the first sensor to the second sensor, and, if the first power flow is oscillating more than a threshold oscillation amount from the recorded power flow or a rate of change of the power flow relative to the recorded power flow exceeds a rate of change threshold, determine that the grid event is a distributed event. 9. A system comprising: an energy storage device coupled to an electrical grid;a plurality of sensors coupled to the electrical grid, the electrical grid comprising a plurality of metering nodes at different geographic locations, each sensor being coupled to a metering node;a control system coupled to the energy storage device and the sensors, wherein the control system is configured to:receive a measurement from each of the sensors;determine, based on the received measurement, whether a grid event is a local event or a distributed event; andselect a response mode for controlling the energy storage device based on whether the grid event is determined to be a local event or a distributed event;wherein the grid comprises first and second levels of grid components and a first plurality of sensors are located in the first level of grid components and a second plurality of sensors are located in the second level of grid components, and wherein determining whether the grid event is a local event or a distributed event comprises counting a first number of sensors reporting the grid event in the first level and a second number of sensors reporting the grid event in the second level and determining whether the grid event is a local event or a distributed event based on the first number of sensors and the second number of sensors;wherein determining whether the grid event is a local event or a distributed event based on the first number of sensors and the second number of sensors comprises:determining a difference between the first number of sensors and the second number of sensors; andif the difference is greater than a threshold difference, determining that the grid event is a local event, and if the difference is less than or equal to the threshold difference, determining that the grid event is a distributed event. 10. A system comprising: an energy storage device coupled to an electrical grid;a plurality of sensors coupled to the electrical grid, the electrical grid comprising a plurality of metering nodes at different geographic locations, each sensor being coupled to a metering node;a control system coupled to the energy storage device and the sensors, wherein the control system is configured to:receive a measurement from each of the sensors;determine, based on the received measurement, whether a grid event is a local event or a distributed event; andselect a response mode for controlling the energy storage device based on whether the grid event is determined to be a local event or a distributed event;wherein determining whether the grid event is a local event or a distributed event comprises:receiving location information from each of the sensors;counting a first number of sensors of a first location reporting the grid event;counting a second number of sensors of a second location reporting the grid event;determining a difference between the first number of sensors and the second number of sensors; anddetermining that the grid event is a local event if the difference is less than or equal to a threshold difference and determining that the grid event is a distributed event if the difference is greater than the threshold difference. 11. A method comprising: receiving a measurement from each of a plurality of sensors coupled to an electrical grid, the electrical grid comprising a plurality of metering nodes at different geographic locations, each sensor being coupled to a metering node;determining, based on the received measurements, whether a grid event is a local event or a distributed event; andselecting a response mode for controlling an energy storage device coupled to the electrical grid based on whether the grid event is determined to be a local event or a distributed event;wherein determining whether a grid event is a local event or a distributed event comprises calculating a difference between a first phase angle at a first sensor of the plurality of sensors and a second phase angle at a second sensor of the plurality of sensors, and, if the difference exceeds a threshold, determining that the grid event is a distributed event. 12. The method of claim 11, comprising: determining that a first grid event is a local event, and in response, causing the energy storage device to inject or absorb active or reactive power at a first rate to compensate for the first grid event; anddetermine that a second grid event is a distributed event, and in response, cause the energy storage device to inject or absorb active or reactive power at a second rate greater than the first rate to compensate for the second grid event. 13. The method of claim 11, wherein determining whether the grid event is a local event or a distributed event further comprises counting a number of sensors reporting the grid event, and, if the number of sensors is greater than a threshold number of sensors, determining that the grid event is a distributed event. 14. The method of claim 11, wherein the grid comprises first and second levels of grid components and a first plurality of sensors are located in the first level of grid components and a second plurality of sensors are located in the second level of grid components, and wherein determining whether the grid event is a local event or a distributed event further comprises counting a first number of sensors reporting the grid event in the first level and a second number of sensors reporting the grid event in the second level and determining whether the grid event is a local event or a distributed event based on the first number of sensors and the second number of sensors. 15. The method of claim 14, wherein determining whether the grid event is a local event or a distributed event based on the first number of sensors and the second number of sensors comprises: determining a difference between the first number of sensors and the second number of sensors; andif the difference is greater than a threshold difference, determining that the grid event is a local event, and if the difference is less than or equal to the threshold difference, determining that the grid event is a distributed event. 16. The method of claim 11, comprising determining that the grid event has occurred by determining that at least a first sensor has reported a reduction in a measured electrical parameter of the grid. 17. The method of claim 16, wherein determining that at least a first sensor has reported the reduction in the measured electrical parameter comprises determining that the first sensor has reported the reduction in the measured electrical parameter for at least a threshold period of time.