A self-contained nanogrid system comprises a power supply input to couple to an external primary power source within a premises, a switch coupled to connect or disconnect the system from the primary power, and a battery as backup to the primary power source. The system further comprises a DC power bus coupled to the battery, an AC power bus coupled to the power supply input via the switch, and a bidirectional inverter coupled between the AC and DC power buses. The system further comprises an integrated load coupled to receive power from the AC power bus or the DC power bus, a power output to provide power from the AC power bus or the DC power bus to an external load, and a processing unit configured to control operations of the self-contained nanogrid system, including the switch.

A load control system for controlling the amount of power delivered from an AC power source to a plurality of electrical load includes a plurality of independent units responsive to a broadcast controller. Each independent unit includes at least one commander and at least one energy controller for controlling at least one of the electrical loads in response to a control signal received from the commander. The independent units are configured and operate independent of each other. The broadcast controller transmits wireless signals to the energy controllers of the independent units. The energy controllers do not respond to control signals received from the commanders of other independent units, but the energy controllers of both independent units respond to the wireless signals transmitted by broadcast controller. The energy controller may operate in different operating modes in response to the wireless signals transmitted by the broadcast controller.

A battery energy storage system is disclosed that receives energy from an electrical grid and supplies electrical energy to one or more microgrids. The battery energy storage system comprises a power conversion system arranged to charge a battery with the energy from the electrical grid and discharge the battery to supply electrical energy to the one or more microgrids. An energy control system controller communicatively coupled to the power conversion system manages the energy drawn from the electrical grid to charge the battery and to manage the energy discharged from the battery to supply electrical energy to the one or more microgrids.

A method including receiving, from a tool-agnostic device configured to connect to a battery port of a handheld tool, usage data. The method further including determining, based at least in part on a tool type identifier, a safety threshold value. The method further including determining whether the handheld tool is safely operating or unsafely operating based at least in part on: (i) the usage data and (ii) the safety threshold value. The method further including interrupting an electrical connection between a removable battery and the handheld tool when the handheld tool is determined to be unsafely operating.

A photovoltaic distribution network system and a network configuration method therefor are provided. The photovoltaic distribution network system includes multiple photovoltaic devices, a router and a distribution network control device configured to generate a device list including device information of to-be-configured devices and transmit the device list and network configuration information to the to-be-configured devices. The to-be-configured device is configured to broadcast device information of the to-be-configured devices based on the network configuration information. The router is configured to receive the device information broadcast by the to-be-configured devices and establish a communication connection with a first distribution network device among the to-be-configured devices based on device information of the first distribution network device. The first distribution network device is configured to receive device information broadcast by a to-be-configured device not in a communication connection and establish a direct or indirect communication connection with the to-be-configured device.

A method, system and apparatus are disclosed. A management node configured to communicate with a power grid operator and with a plurality of RBSs is provided. Each of the plurality of RBSs is configured to be switchable between power from a power grid and power from a respective plurality of backup battery units associated with the RBS. The management node is configured to: determine a primary subset of the plurality of RBSs to participate in at least one FCR event occurring over a predefined time interval, and determine a standby subset of the plurality of RBSs that are each configured to participate in the at least one FCR event in place of a failure of a respective one of the primary subset of the plurality of RBSs.

A system and method for improving electrical efficiency in a system with three-phase electrical current is disclosed. The system includes components used to balance the currents between the phases and components used to tune components to minimize the lag between current and voltage for each of the phases for each of the three phase loads, excess power and heat is reduced in a main transformer, and upstream harmonics are prevented from feeding back into the electrical network in a system with three phase power supplied and three phase loads.

A system and method for controlling energy consumption in a facility region uses smart electrical sockets. The system includes smart electrical sockets with plug receptacles and socket controllers that can switch power on/off to the connected appliances. A supervisory controller connects to an occupancy sensor and the smart sockets. When the region becomes unoccupied for a threshold time, the controller signals selected sockets to switch off power to their connected appliances. When occupancy resumes, power may be automatically restored to selected sockets. Alternatively, or in addition, the system responds to demand response events by switching off power delivered by certain smart sockets, and automatically restoring power to selected sockets once the demand response event expires.

A method includes: providing a device having a counter that stores a cycle count measuring a number of clock cycles since the device was last turned ON or a timer that stores an elapsed time since the device was last turned ON; (a) flagging a first or additional defined memory location when the cycle count or the elapsed time reaches a first or additional first milestone; (b) unflagging the first or additional defined memory location when the cycle count or the elapsed time reaches a second or additional second milestone, wherein the second or additional second milestone is greater than the first or additional first milestone; (c) determining that the device is turned OFF and then ON again; repeating steps (a) through (c) a specified number of times; and resetting the device or turning a program ON when all the first or additional memory locations reach a specified flag configuration.

Methods and systems describe multicasting the messages over a broadcast medium (e.g., a TV network). In particular, the methods and systems recite the use of Advanced Television Systems Committee (ATSC) 3.0, a new broadcast television transmission standard in the United States. Using ATSC 3.0, the methods and systems can disseminate messages to all the electrical equipment.