A control system includes a computer that controls each of multiple power balancing resources. The computer selects one or more control targets to be used for power balancing of an external electric power source from the power balancing resources, and controls each of the one or more control targets so as to cause the power storage device to charge or discharge for the power balancing. The computer preferentially selects the power balancing resource provided with a small-capacity power storage device as the control target for the power balancing of which duration is shorter than a predetermined time, and preferentially selects the power balancing resource provided with a large-capacity power storage device as the control target for the power balancing of which the duration is longer than the predetermined time.

A power supply/demand adjusting method disclosed here is a method for adjusting power supply and demand between a power transmission/distribution system and a storage battery mounted on an electric vehicle. The method includes the steps of: acquiring power selling approval of a storage battery; acquiring battery information of a storage battery for which the power selling approval is acquired based on the acquired power selling approval and power demand information from the power transmission/distribution system; calculating a power selling amount to be transmitted from the storage battery to the power transmission/distribution system, based on the acquired battery information of the storage battery and the acquired power demand information; supplying electric vehicle based on the power selling amount from the storage battery to the power transmission/distribution system; and calculating an incentive to be provided to a user of the electric vehicle based on the power selling amount.

An example operation includes one or more of determining, by a transport at a first location, that the transport is not in use, determining, by the transport, a second location to transfer energy stored in the transport, maneuvering, by the transport, to the second location, discharging, by the transport, the stored energy to the second location, and maneuvering, by the transport, to the first location.

A charging and discharging apparatus includes a communication module and a conversion module. The communication module is communicatively connected to a BMS and is configured to, in response to the apparatus being in a first energy transmission mode and the BMS not supporting a specific discharging protocol, perform first communication with the BMS based on a universal charging protocol. One side of the conversion module is connected to a battery and another side of the conversion module is connected to an alternating current side connecting structure. The conversion module is configured to convert direct current provided by the battery into alternating current and transmit the alternating current to the alternating current side connecting structure during the first communication. The first energy transmission mode is a mode in which the battery transmits power to the alternating current side connecting structure of the apparatus.

Various embodiments disclosed herein generally relate to methods and systems for real-time, or near real-time, balancing of an electrical distribution grid. According to at least one embodiment, there is provided one or more local balancing systems, each comprising: an energy storage unit (ESU) operable to store direct current (DC) power; a power converter comprising a DC side and an AC side, the power converter being operable to convert between single-phase (AC) power and DC power, wherein the DC side is electrically coupled to the ESU and the AC side is electrically couplable to at least one secondary distribution block in a secondary distribution grid; and a local controller coupled to the power converter and operable to control the power converter to convert between DC power and AC power.

A power calculation apparatus calculating an amount of power suppliable to a power system by an energy source connectable, at a connection point, to the power system and capable of power generation and power storing, the power calculation apparatus includes: a microprocessor and a memory connected to the microprocessor, wherein the microprocessor is configured to perform: specifying a position of the connection point of the energy source in connection with the power system; acquiring a capacity information indicating a power generation capacity or a remaining storage capacity of the energy source; and calculating an amount of power suppliable by the energy source to the power system in an area within a predetermined range including the connection point, based on the capacity information and the position of the connection point.

An embodiment bidirectional charging system for a vehicle includes a first bridge circuit having a plurality of legs each including two first switching elements connected in series with each other between both ends of a battery, a transformer comprising a plurality of primary-side windings connected to a grid or load side and a plurality of secondary-side windings insulated from the plurality of primary-side windings, a motor including a plurality of input terminals configured to receive a plurality of phase voltages, respectively, a plurality of changeover switches configured to selectively connect connection nodes of the two first switching elements included in the plurality of legs to the plurality of secondary-side windings or to the plurality of input terminals, respectively, and a controller configured to control connection states of the plurality of changeover switches according to a pre-configured operation mode.

An onboard DC charger for an electric vehicle, wherein the electric vehicle includes an electric machine and a power conversion device that is a drive circuit for the electric machine and a charging circuit for the on-board battery. The one or more electric machines of the vehicle are mounted to the body for providing locomotive energy, wherein the or each machine has a stator, a rotor mounted to the stator for rotation, and one or more windings; and a controller for operating in a first state and a second state wherein, in the first state, the controller allows current to be drawn from the DC energy source for energising at least one of the one or more windings such that the electric machine provides the locomotive energy and, in the second state, the controller controls the position of the rotor relative to the stator and allows at least one of the one or more windings to be energised to provide a charging current to the DC energy source.

A method for controlling an electrical consumer is provided. The electrical consumer is coupled to an electricity supply grid using a frequency converter. The electricity supply grid has a line voltage and is characterized by a nominal line voltage. The electricity supply grid is monitored for a grid fault in which the line voltage deviates from the nominal line voltage by at least a first differential voltage. When the grid fault occurs, the electrical consumer remains coupled to the electricity supply grid, and a power consumption of the electrical consumer is changed on the basis of the deviation of the line voltage from the nominal line voltage.

Systems and methods are provided for coordinating and providing bidirectional energy transfer events between electrified vehicles and households or other structures, such as for supporting household loads associated with the structures during power outage conditions. In some implementations, available energy may be rationed from the vehicle to the structure based on a power outage restoration estimate. Rather than supporting household loads with constant energy during power outage conditions, the disclosed systems/methods may provide strategic rationing of bidirectional energy transfer in order to extend appliance operation for the duration of power outage conditions.