The present invention proposes a DC power distribution system comprising power source equipment (PSE) providing high powered power over ethernet connections of 200 W per ethernet cable connected with powered devices (PDs) and power distribution units (PDUs). The PD and PDUs connected to the PSE have second ethernet port for extending the high power PoE connection to at least a second PDU or PD. The system also provides a common mode longitudinal system for communicating across the network of PSE, PD and PDU devices and sensor data and command data sent to and from connected PD. The PD and PDU devices incorporate a supervisor circuit for monitoring the s high power PoE connection and for directing the communications with other connected devices. The PDU devices incorporate DC-to-AC inverters for providing AC power, locally from the high power PoE DC connections, where AC power is required.

An example operation includes one or more of determining a severity and a duration of a predicted deficiency of a renewable energy source in an area, responsive to the severity being above a first threshold and the duration being above a second threshold, providing stored energy from energy storage units in the area during the duration to overcome a portion of the predicted deficiency, and responsive to the severity being further above a third threshold and the duration being above a fourth threshold, providing stored energy from vehicles in the area during the duration to overcome another portion of the predicted deficiency, wherein the third threshold is greater than the first threshold, and the fourth threshold is greater than the second threshold.

A method for damping oscillations in a power grid is provided. A damping vector (9) targeted at a position of a damping entity (11) and referencing a common reference time frame (4) is generated, based on an identified oscillation in the power grid, the damping vector (9) specifying a frequency, a phase angle and an amplitude. The damping vector (9) is provided to the damping entity (11), and the damping entity (11) reconstructs an oscillation signal corresponding to the oscillation in the power grid, based on the damping vector (9) and applying the common reference time frame (4). The damping entity (11) supplies and/or consumes active and/or reactive power to/from the power grid in accordance with the reconstructed oscillation signal, thus causing damping of the oscillation in the power grid.

A microgrid controller of a microgrid configured to receive load information corresponding to a plurality of loads connected to the microgrid, receive energy resource information corresponding to a plurality of energy resource systems connected to the microgrid monitor one or more microgrid parameters, according to a soft diagnostic condition, based on at least one of the energy resource information or the load information, detect a soft trigger event based on the one or more microgrid parameters satisfying the soft diagnostic condition, in response to the soft diagnostic condition being satisfied, monitor the one or more microgrid parameters, according to a hard diagnostic condition, based on at least one of the energy resource information or the load information, detect a hard trigger event based on the one or more microgrid parameters satisfying the hard diagnostic condition, and in response to the hard diagnostic condition being satisfied, generate a hard alarm.

The present invention relates to an energy management system for a building, comprising at least one heat pump, at least one first thermal energy storage device for providing domestic hot water, at least one second thermal energy storage device for providing space heating, at least one renewable energy generation device, at least one first state of charge analyser for determining the state of charge of the at least one first thermal energy storage device, at least one second state of charge analyser for determining the state of charge of the at least one second thermal energy storage device, and a controller configured to control the at least one heat pump, the at least one first thermal energy storage device, the at least one second thermal energy storage device, and the at least one renewable energy generation device. The controller is configured to control, in dependence on at least the state of charge of the at least one first thermal energy storage device and/or the state of charge of the at least one second thermal energy storage device, whether one of and which of the at least one first thermal energy storage device and the at least one second thermal energy storage device is charged with energy provided by (a heat pump operation of) the at least one heat pump and/or energy provided by the at least one renewable energy generation device. Furthermore, the present invention relates to a method of using the energy management system.

This application provides an energy storage system control method, a control apparatus, and an energy storage system. The energy storage system is coupled to an energy generation system and includes a plurality of energy storage units. The energy storage system control method includes: controlling, in a first stage, the energy generation system to charge a first energy storage unit in the plurality of energy storage units, where the first stage is a charging stage in a charging cycle of the first energy storage unit; and controlling, in a second stage, the first energy storage unit to discharge electricity to a second energy storage unit in the plurality of energy storage units, where the second stage is a discharging stage in the charging cycle of the first energy storage unit.

The present disclosure provides an energy storage system. For example, an energy storage system comprises a chassis and a printed circuit board assembly connected to the chassis and comprising a connecting/disconnecting device configured to connect to a corresponding connecting/disconnecting device on the battery cell for enabling connection of the battery cell to the chassis.

An example operation includes at least one of providing energy, stored by at least one battery in at least one of an electric vehicle, or an energy storage unit at a location, to an electrical grid, and adjusting a temperature setpoint, for a temperature-controlling device at the location, based on the provided energy.

A method of operating a power plant includes generating, with one or more power generators, a total plant power. The method further includes providing a first portion of the total plant power to one or more auxiliary devices to meet an auxiliary demand. The method further includes providing a second portion of the total plant power to a flexible firm skid disposed within the power plant to meet a flexible firm demand. The method further includes providing a third portion of the total plant power to a power grid outside of the power plant to meet a grid demand. The method further includes receiving an increase in the grid demand that exceeds a power ramp rate of the one or more power generators. The method further includes adjusting an operation of the flexible firm skid to modify the flexible firm demand in response to the increase in the grid demand.

A method for controlling a converter supplying a load is described. The converter is connected to an alternating current (AC) grid supplied by at least one renewable energy source. The method comprises receiving a measured AC grid voltage measured in the AC grid and a measured load voltage measured at an output of the converter. The method further comprises determining a magnitude of a fundamental positive-sequence component of the measured AC grid voltage. The method additionally comprises determining a load voltage reference from the magnitude and from a nominal load voltage reference, wherein the load voltage reference decreases when the magnitude decreases. The method also comprises determining a voltage error by subtracting the measured load voltage from the load voltage reference. The method further comprises controlling an output power of the converter based on the voltage error.