A method for controlling an energy network includes transmitting a respective offer message by using a plurality of agent devices, each agent device being assigned to a subnetwork of the energy network, and each offer message indicating a subnetwork-specific measure for controlling the respective subnetwork and a period for which the subnetwork-specific measure is offered. A network control arrangement is used for receiving the offer messages, and identifying an undesirable network state of the energy network. A subnetwork-specific measure is selected from the plurality of subnetwork-specific measures, and an acceptance message is transmitted to that agent device which sent the offer message containing the selected subnetwork-specific measure by using the central network control arrangement. A corresponding agent device, a corresponding network control arrangement and a system including an agent device and a network control arrangement are also provided.

Disclosed herein are system, method and/or computer program product embodiments, and/or combinations and sub-combinations thereof, for modulating power consumption of a device powered by harvested energy. An example embodiment operates by executing a model, such as a machine learning model, that predicts an amount of energy that will be harvested over a future time period by an energy harvesting component used to power an electronic device, determining an energy budget for the electronic device based at least on the predicted amount of energy that will be harvested, determining, based on the energy budget, that an amount of energy available for powering the electronic device is below a predetermined threshold, and modulating power consumption by the electronic device based on the determination that the amount of energy available for powering the electronic device is below the predetermined threshold.

A method and system for controlling a photovoltaic solar power generation source operatively coupled to a power grid system at a point of common coupling (PCC) to perform a plurality of dynamic reactive power control based functions including: reactive power set point control, power factor control, and voltage control, when its primary energy source is not available, and available. Voltage control may also prevent PCC voltage from violating a voltage limit caused by real power generation from itself or by real power generation from an additional distributed power generation source operatively connected to said power grid system, or by both. Controlling a battery energy storage based distributed power generation source operatively coupled to a power grid system at a PCC to perform reactive power set point control, power factor control, and voltage control, during both the conditions when its primary energy source is not available, and available is also provided.

An energy storage system and an insulation impedance detection method for an energy storage system. The energy storage system includes a plurality of energy storage converters, a plurality of energy storage units, one first insulation impedance detection apparatus, a plurality of second insulation impedance detection apparatuses, and a controller. The energy storage units are connected to direct current ends of the energy storage converters, and are correspondingly connected to the second insulation impedance detection apparatuses, and a parallel connection point of alternating current ends of the plurality of energy storage converters is connected to the first insulation impedance detection apparatus. When a first insulation impedance is abnormal, the controller controls the plurality of second insulation impedance detection apparatuses to detect corresponding second insulation impedances, and sends an alarm signal if there is an abnormal second insulation impedance.

The disclosure relates to a method for operating a DC supply network which is connected to an AC supply network via an active AC/DC converter and a star-point-grounded transformer. At least one disconnecting element is arranged between the AC supply network and the transformer and at least one device for supplying direct current independently of the AC supply network is provided in the DC supply network. The method includes stopping the conversion of alternating current to direct current, disconnecting the transformer from the AC supply network, supplying power to the DC supply network, and operating the converter to convert direct current to alternating current and applying AC voltage to at least two secondary windings of the transformer.

An inverter, a grid-connected control method, a photovoltaic system, an apparatus, and a medium are provided. The inverter includes: a power conversion circuit and a controller. The controller is configured to, in a case that the inverter operates in a standby state, control the inverter to operate in an off-grid state when a direct-current voltage of the inverter is greater than a voltage threshold, and adjust an off-grid operation parameter of the power conversion circuit in the inverter or an operation parameter of a temperature regulation system in an inverter cabinet. The controller is configured to, when the inverter meets at least one predetermined condition, control the inverter to operate in a grid-connected state. The predetermined condition includes: the direct-current voltage, an alternative-current voltage, an alternative-current current, a direct-current current, a direct-current side power or an alternative-current side power of the inverter being greater than a corresponding threshold.

The present disclosure provides systems and methods for controlling an electrical system. The electrical system includes a plurality of backup power sources, such as an electric vehicle battery, a photovoltaic system, and an energy storage system. The electrical system includes a service panel electrically coupled to a plurality of electrical loads. The electrical system includes an energy control system electrically coupled to the plurality of backup power sources, the service panel, and a utility grid. The energy control system converts to a plurality of settings based on the number of available backup power sources. The energy control system determines the availability of the backup power sources according to a predetermined protocol such that one or more backup power sources are prioritized over other backup power sources.

The present disclosure relates to a system 1000 for continuous, demand-based energy supply of a building 2000, comprising: a first energy supply module 100 for providing an amount of energy of a first form of energy, a first energy converter module 200, which has a first, primary load-dependent energy converter 210 for primary load-dependent conversion of a part of the provided amount of energy of the first form of energy into a second form of energy that is different from the first form of energy, and a first energy storage 220/230 for storing an amount of energy of the second form of energy, a consumer module 600/800 that has at least one consumer of the building 2000 for consuming a demand-dependent amount of energy of the first form of energy and/or a demand-dependent amount of energy of the second form of energy, and a control unit 900 for controlling the modules of the system 1000, the system 1000 further comprising a second energy converter module 300 which has a second energy converter 310 for converting another part of the amount of energy of the first form of energy into a third form of energy different from the first and second forms of energy, wherein in the conversion of the other part of the amount of energy of the first form of energy into the third form of energy, at the same time a part of the other part of the amount of energy of the first form of energy is converted into the second form of energy, a second energy storage 320 for storing the amount of energy of the third form of energy, and a third energy converter 330/340 for converting a stored amount of energy of the third form of energy into the first form of energy, wherein when converting the stored amount of energy of the third form of energy into the first form of energy, a part of the amount of energy of the third form of energy is simultaneously converted into the second form of energy.

A power management system is provided, which is electrically coupled to a photovoltaic array, a power grid, and a battery, and includes a power converter, and a processing module. The power converter is configured to operate in one of operation modes, including a self-consumption mode, a Time of Use mode, and a backup mode, to regulate power flow among the photovoltaic array, the power grid, and the battery. The processing module is configured to generate, through a forecast model, predicted data representing power demand, power generation of the photovoltaic array, and tariff of the power grid over a first time period; determine one of the operation modes to be a target mode for the power converter and a corresponding switch time based on the time series of predicted data; and control the power converter to operate in the target mode at the switch time.

Computer implemented systems and methods for providing an uncertainty platform for an energy grid controller that (1) receives risk inputs including (a) one or more load forecasts, (b) one or more wind forecasts, (c) one or more solar forecasts, (d) one or more generator availability risk forecasts, (e) one or more generator fail-to-start or fail-to-run predictions, (f) one or more net scheduled interchange forecasts, and/or (g) one or more transmission congestion forecasts; (2) determines net uncertainty for a predetermined time period based on the risk inputs; and (3) provides dynamic risk outputs including forecast scenarios, reserve requirements and/or reserve margin thresholds based on the determination of net uncertainty.