A method for operating a microgrid using a distributed energy resource (DER) controller determines an output power value of a DER. The method also receives a remote power correction value from a second DER controller. The method further determines a local output power reference value as a function of the output power value and the remote power correction value. The method further determines a frequency set point as a function of the local output power reference value and a droop coefficient. The method further adjusts an output frequency of the DER as a function of the frequency set point.

A power conversion device according to one embodiment has an inverter that converts direct-current power supplied from a direct-current power source to alternating-current power, a determination unit that determines whether or not a negative-phase sequence voltage on an alternating-current side of the inverter is a predetermined value or greater, and a stop control unit that performs control to stop the inverter in a case where the determination unit determines that the negative-phase sequence voltage is the predetermined value or greater. Further, the stop control unit may perform control to stop the inverter in a case where a positive-phase sequence voltage on the alternating-current side of the inverter is within a predetermined range.

Protection distribution devices including switches, disposed on a distribution grid, are individually provided with slave stations. The slave stations are connected to each other via communication lines and connected to a high-order server. Each slave station includes a failure symptom cause estimation circuitry to estimate a symptom cause for failure on the distribution grid on the basis of waveform data measured by a measurement circuitry which performs signal processing on waveform data of current or voltage detected by the protection distribution device, and a data transmitter/receiver to transmit an estimation result for the symptom cause for failure on the distribution grid obtained by the failure symptom cause estimation circuitry, to the server. The failure symptom cause is autonomously estimated through mutual communication among the slave stations.

Disclosed herein is a solar generation facility capable of using high power by configuring packages each including a power pump and a solar module in multiple stages. The solar generation facility includes a plurality of solar module packages connected in series to one another and stacked in multiple layers and at least one condenser corresponding to the solar module packages. At least one of the solar module packages has a solar module that supplies power to a load stage and a power pump that provides lifting power to the solar module. Here, the solar module outputs the power by reflecting the lifting power provided from the power pump.

Systems and methods of improving storage and consumption of electricity according to time-based tiered criteria are disclosed. An energy storage system controlled by a processor is optionally connected to a utility power grid, a photovoltaic (PV) power source, and/or electrical loads. Time-of-use (TOU) rates (or similar tiered criteria) are input into the processor, which sets charge and discharge profiles according to the criteria, the arrangement of time windows, and the user's preferences. Energy is stored or discharged according to these profiles. Additionally, the energy storage system may record the production and consumption patterns of the user over time, and use this information to modify the profiles for enhanced performance by allowing discharge during non-peak windows. Benefits include reduced electrical cost to the user, reduced strain on the utility power grid during peak consumption hours, and enhanced performance with regard to any other criteria input into the processor.

The present invention relates to an apparatus and method for the localized capture, storage and specialized use of power generated from natural sources, such as solar power or hydropower. The apparatus can be used, for example, or in or near commercial or residential buildings, vehicles, marine vessels, a wind farm turbine tower, or in a solar park or photovoltaic power station, or anywhere there is a requirement for localized power generation, localized storage and wider distribution of power.

Various embodiments include methods for controlling energy conversion, energy storage, energy transportation, and/or energy consumption of multiple energy installations of an energy system and/or of multiple consumers flexible with regard to their load. The method may include: optimizing values of variables for control by calculation based on a first and a second optimization variable; calculating multiple solutions of the values optimum with regard to the first optimization variable, using a first optimization; ascertaining one of the calculated solutions as optimum with regard to the second optimization variable using a second optimization; and using the optimum calculated solution for controlling the energy system.

The present disclosure describes a method of operating a power plant, comprising: obtaining an energy production forecast for a forecast period; generating a plurality of simulation results associated with simulated operation of the power plant for the forecast period, wherein the plurality of simulation results are generated by simulating operation of the power plant using a plurality of control algorithms; assigning a score to each of the plurality of control algorithms based on the generated plurality of simulation results; selecting a control algorithm from the plurality of control algorithms for the forecast period based on the assigned score for the control algorithm; and operating the power plant in accordance with the control algorithm for a duration of the forecast period.

Provided is a system and method for visualizing power components on a power grid via an arc diagram. The arc diagram can be an interactive diagram that enables an operator to perform a switching operation via the arc diagram. In one example, the method may include storing power measurements from a power grid and geographical topology data of devices on the power grid via a memory device, generating and displaying an arc diagram based on the geographical topology data, where the arc diagram comprises a plurality of nodes corresponding to a plurality of devices on the power grid which are arranged along a horizontal axis in the arc diagram, and arranging arc-shaped structures between the plurality of nodes on the horizontal axis based on the power measurements, where the arc-shaped structures represent power flows between the plurality of devices.

A control system and method for an inverter-based resource device provided in a synchronous power grid. The control system includes at least one inverter based resource device connected to an electrical power system, and a controller module. The inverter based resource device includes a reference power Pref, a combination module and a transfer function. The inverter based resource device injects modulated power into the power system. The power system (which is represented by a transfer function in the control system) receives an undesirable forced oscillation, which is connected to a measuring device. A controller module processes the measured output and provides a control signal to the inverter based resource device. The controller is arranged to suppress a forced oscillation detected in the power system.