The present invention provides a method, system and storage medium for load dispatch optimization for residential microgrid. The method includes collecting environmental data and time data of residential microgrid in preset future time period; obtaining power load data of residential microgrid in future time period by inputting environmental data and time data into pre-trained load forecasting model; obtaining photovoltaic output power data of residential microgrid in future time period by inputting environmental data and time data into pre-trained photovoltaic output power forecasting model; determining objective function and corresponding constraint condition of residential microgrid in future time period, where optimization objective of objective function is to minimize total cost of residential microgrid; obtaining load dispatch scheme of residential microgrid in future time period by solving objective function with particle swarm algorithm. The invention can provide load dispatch scheme suitable for current microgrid and reduce operating cost of residential microgrid.

A rapidly deployable modular microgrid including a plurality of renewable and other energy generation technologies, energy storage technologies, energy distribution networks, and intelligent control systems capable of managing the flow of electrical energy between one or more locations of energy generation, storage, and consumption are disclosed. The aforementioned microgrid may be delivered and rapidly deployed to provide primary or secondary electricity for a variety of purposes; including but not limited to household electrification, commercial or industrial productivity, grid resiliency, water pumping, telecommunication systems, medical facilities, and disaster relief efforts.

The invention discloses a method and a system for correction of the junction temperatures of an IGBT module in a photovoltaic inverter. The method includes: constructing an electrothermal coupling model of an IGBT model based on a photovoltaic inverter topology, a light radiation intensity, and an ambient temperature; selecting an IGBT collector-emitter on-state voltage drop as an aging parameter and designing an on-state voltage drop sampling circuit to ensure measurement accuracy; constructing an aging database for IGBT modules in different aging stages based on large current and small current injection methods; comparing a junction temperature value output by the electrothermal coupling model with the calibrated junction temperature value and calibrating an aging process coefficient of an electrothermal coupling model correction formula; comparing an IGBT aging monitoring value with the aging threshold to determine the aging process and selecting a corresponding aging process coefficient to ensure accuracy of junction temperature data.

A method for operating a photovoltaic module in which the photovoltaic module has at least one perovskite solar cell. The method includes temporarily operating the photovoltaic module at the maximum power point by a control device connected to the photovoltaic module, wherein the drawing of electrical energy is interrupted when the irradiance of electromagnetic radiation impinging on the photovoltaic module falls below a predetermined threshold value. A photovoltaic device includes a photovoltaic module having at least one perovskite solar cell, and a control device connected to the photovoltaic module.

A direct-current coupling hydrogen production system includes at least one electricity generation system and multiple hydrogen production electrolyzer systems. The electricity generation system includes: a controller, N renewable energy systems, multiple conversion systems and a power switching unit. The power switching unit includes N input ports and M output ports. The controller is configured to control the power switching unit to supply the multiple hydrogen production electrolyzer systems through its output ports with electrical energy received through its input ports, or is configured to control the power switching unit to collect electrical energy received through its input ports and to supply the multiple hydrogen production electrolyzer systems through its output ports respectively corresponding to the hydrogen production electrolyzer systems with the collected electrical energy.

A control method of a three-phase multi-level inverter includes: determining a modulation ratio based on output of the three-phase multi-level inverter, where the modulation ratio indicates a ratio of an amplitude value of a sinusoidal modulation wave in pulse width modulation to an amplitude value of a carrier; generating, based on the modulation ratio and a modulation ratio threshold, a common-mode voltage regulation signal for regulating a common-mode voltage in phase voltages of the three-phase multi-level inverter; adding the common-mode voltage regulation signal and a differential-mode voltage regulation signal for regulating a differential-mode voltage in the phase voltages of the three-phase multi-level inverter to obtain a composite regulation signal, where the composite regulation signal is presented as a modulation wave for discontinuous pulse width modulation (DPWM); and generating, based on the composite regulation signal, drive signals for controlling switches of phases of the three-phase multi-level inverter.

The present invention relates to new energy vehicle field, and more particularly to vehicle-mounted tracking solar power generation system without photoelectric sensor. The current vehicle-mounted thin-film solar power generation device has a low power generation, inductive tracking technology has high cost and large volume, so neither of them can meet the electricity demand of new energy vehicles, therefore, at the moment when the photoelectric conversion rate is difficult to effectively improve in the short term, making the vehicle-mounted photovoltaic power generation system not only able to track but also has practicality, has become a technical problem that needs to be solved urgently in the vehicle-mounted solar charging industry, the present invention provides a solar tracking technology that adopts a combination of the orbital device and the platform, does not require real-time tracking and photoelectric sensors, and solves the above-mentioned technical problems well.

A power management system includes a photovoltaic power generation device installed in a predetermined area and connected to a power grid disposed in the predetermined area, an acquisition device configured to acquire a wind direction at a reference point at which the photovoltaic power generation device is installed in the predetermined area, and an arithmetic device configured to calculate a predicted value of a solar radiation amount at the reference point at a prediction target time and calculate generated power of the photovoltaic power generation device by using the predicted value.

An inverter parallel system and a zero feed-in control method for the inverter parallel system are provided. The system includes at least one first inverter, at least one second inverter, a load, an electrical grid, a controller, and an electrical parameter measuring device. The controller includes a system control module, and the first inverter includes an inverter control module. The system control module is configured to determine a battery power reference value of an energy storage battery according to an electrical grid current reference value and an electrical grid current sampling value. The inverter control module is configured to control the first inverter, such that a feed-in current flowing into the electrical grid side is zero, and the second inverter operates in a maximum power point tracking state. Therefore, in the system, zero feed-in control may be achieved without energy management and without communication between inverters. Therefore, the need for installation of communication lines in the conventional wired communication is eliminated, system costs and installation difficulty are reduced, and the system can operate in the optimal state.

An embodiment converter includes a magnetic material, a first circuit including a first winding surrounding the magnetic material and a clamp circuit configured to reset a power conversion operation, the first circuit being configured to convert power received from a first input voltage source to provide the converted power to a load, and a second circuit including a second winding surrounding the magnetic material, the second circuit being configured to convert power received from a second input voltage source to provide the converted power to the load and to perform the power conversion operation being reset by the clamp circuit.