The present disclosure relates to a control method, a load and a power grid system. The method includes: detecting (S102) a voltage change parameter on a power supply side; analyzing (S104) a load control strategy corresponding to the voltage change parameter; controlling (S106) an operation of the load according to the load control strategy. The solution solves the problem of inadequate communication facilities in the DC micro-grid, the DC home communication can be completed without or with less dedicated communication circuits, accordingly the system cost is reduced.

A load apparatus is connected to an AC power source and is supplied with power from the AC power source. An operation state control unit controls, based on a target value about a power-source quality including either a power-source power factor of the AC power source or a power-source harmonic of the AC power source and on a present power-source quality, an operation state of the load apparatus.

A method and apparatus for autonomous, automatic interleaving of cycled loads coupled to a grid. In one or more embodiments, the method comprises (i) determining, by a smart load coupled to a grid, a first grid stress value; (ii) comparing, by the smart load, the first grid stress value to an activation threshold; (iii) waiting, by the smart load, when the first grid stress value is less than the activation threshold, a delay period; (iv) determining, by the smart load and after the delay period ends, a second grid stress value; (v) comparing, by the smart load, the second grid stress value to the activation threshold; and (iv) activating, by the smart load, when the second grid stress value is less than the activation threshold.

A method for operating a charging station for charging a plurality of electric vehicles, in particular electric automobiles, wherein the charging station is connected to an electricity supply grid at a grid connection point in order thereby to be supplied with electrical energy from the electricity supply grid, the grid connection point is arranged on a first grid section of the supply grid and at least one further electrical consumer is connected to at least one second grid section of the supply grid, the first and the second grid section are connected to one another, the at least one further consumer and/or the at least one second grid section are able to be influenced by the charging station, the charging station is controlled such that a grid voltage in at least one of the grid sections is controlled, and/or a power flow at least in the at least one second grid section is controlled.

Aspects of the subject disclosure may include, for example, embodiments detecting and correcting load imbalance on power supply phases within a managed scope using a software controlled power switch matrix that is resident in each power distribution unit supplying power in the managed scope. Managed scope could include a plurality of power distribution units supplying a plurality of circuit or equipment loads in a plurality of premises. On each PDU, the software controlled switch matrix maintains and changes physical coupling of power supply phases to circuit and equipment loads. Further embodiments include correcting power supply phase load imbalances through software commands to adjust the coupling of power supply phases to circuit or equipment loads. Embodiments are intended to help power administrators maintain power supply phase load balance effectively in a managed scope. Other embodiments are disclosed.

A method and apparatus for detecting and prioritizing loads comprising a load analyzer configured to receive at least one load monitoring signal from at least one channel, where each channel is configured to be coupled to at least one load, and analyze at least one load signature derived from the at least one load monitoring signal to detect a load type that is connected to the at least one channel and assign an energy consumption priority to the at least one load.

Systems and methods of managing power distribution in a portion of an electrical power grid with at least one power storage, including: receiving at least one power consumption rule from at least one consumer of the power grid, analyzing power consumption data from at least one power consumption meter connected to the power grid, applying the at least one power consumption rule on the analyzed power consumption data, based on forecasted data, and managing power consumption for the at least one consumer, based on the result of the at least one power consumption rule, and also based on a power capacity status of the at least one power storage.

A power management system includes a plurality of power adjustment resources electrically connected to a microgrid, and a CEMS server that manages the plurality of power adjustment resources. The plurality of power adjustment resources include a plurality of FCEVs that supply electric power to the microgrid. Each of the plurality of FCEVs executes a refresh process that removes an oxide film formed on a catalyst electrode of an FC stack by causing the FC stack to generate electric power exceeding prescribed electric power. The CEMS server adjusts execution timings of the refresh process in the plurality of FCEVs during power supply to the microgrid, so as to respond to a request to adjust power supply and demand in the microgrid.

A distribution network management system includes a power generation device including a renewable energy power generation source, and is connected to a distribution network through a first node; a first distributed device including a first distributed resource, connected to the distribution network through a second node, and configured to receive first node information and power generation information from the power generation device and attempt to control the first distributed resource so that an overvoltage for the first node is resolved; and a second distributed device including a second distributed resource, connected to the distribution network through a third node which is located farther away from the first node than the second node, and configured to, when the first node information and the power generation information are received from the first distributed device, attempt to control the second distributed resource so that the overvoltage for the first node is resolved.

This document relates to electricity management using modulated waveforms. One example modulates electricity to obtain modulated electricity having at least two different alternating current frequencies including a first alternating current frequency and a second alternating current frequency. The example delivers the modulated electrical power having the at least two different alternating current frequencies to multiple different electrical devices, including a first electrical device configured to utilize the first alternating current frequency and a second electrical device configured to utilize the second alternating current frequency. The modulated electricity can be delivered at least partly over an electrical line shared by the first electrical device and the second electrical device.