206 results about "Mppt controller" patented technology

A control apparatus of a single-phase power converter for a photovoltaic power generation system is disclosed, including a POS MPPT controller for calculating a rating current by applying a POS MPPT control method to an output current detected through a current transformer of a single-phase AC filter, a bandpass filter for filtering only signals of a low-frequency band from a load, a single-phase reference current generator for producing a reference current by matching a phase of the current from the POS MPPT controller to a phase from the bandpass filter, a single-phase current subtractor for subtracting an output current of a current transformer from the reference current calculated by the single-phase reference current generator to thereby calculate a difference current between the output current of the current transformer and the reference current, a PI controller for outputting a control signal, corresponding to the difference current from the single-phase current subtractor, to a PWM signal generator, and the PWM signal generator for generating a PWM phase control signal corresponding to the control signal from the PI controller.

An integrated photovoltaic panel has one or more integral DC-DC converter circuits. The DC-DC converter input port couples to a section of at least one photovoltaic (PV) device of the panel separate from PV devices feeding other converters. The converter has an MPPT controller for operating the converter to transfer maximum power from coupled photovoltaic devices to its output port. The PV panel has a transparent substrate to which PV devices are mounted. A laminating material seals PV devices and converters to the substrate. In embodiments, the panel has multiple converters connected with output ports in series. The integrated PV panel provides summed maximum powers of each section of PV devices. In some embodiments the DC-DC converters are complete with inductors, in other embodiments a common inductor is shared by multiple converters of the panel, in a particular embodiment the common inductor is parasitic inductance of the panel.

A maximum power point tracking (MPPT) converter of a new and renewable energy storage system for tracking and extracting a maximum power from a new and renewable energy to provide the maximum power to a DC link. The MPPT converter includes an MPPT controller changing a controlled variable for maximum power point extraction in proportion to a current slope of the new and renewable energy, and an MPPT extractor extracting a maximum power from the new and renewable energy and converting the extracted maximum power in response to a control of the MPPT controller. The controlled variable variation is set to a large value if the current slope is out of a predetermined current slope range, and the controlled variable variation is set to a small value if the current slope is within the predetermined current slope range.

Even at an unknown power point, control by estimated maximum power point is carried out. An MPPT controller (20) includes: a measurement data acquiring section (31), which acquires an amount of solar radiation and/or a temperature from a pyrheliometer (14)/a thermometer (15), and which acquires an electric current value and/or a voltage value from an ammeter (17a)/a voltmeter (17b); a search control section (34), which searches for a maximum power point by controlling a power point of an array (10) by controlling an inverter (18); an estimate equation computing section (32), which estimates an estimate equation (A) that holds between the amount of solar radiation and a maximum operating current value and/or an estimate equation (B) that holds between the temperature and a maximum operating voltage value; and an MPP estimating section 35, which estimates a maximum power point at an amount of solar radiation or at a temperature by using the estimate equation (A) or (B).

Methods and systems for connecting a photovoltaic module and an inverter having an input capacitor are presented. The photovoltaic system includes a maximum power point tracking (MPPT) controller coupled between the inverter and the photovoltaic module. The MPPT controller includes a direct current (DC) converter configured to reduce, in a forward buck mode, a voltage of the photovoltaic module, to supply power from the photovoltaic module to the input capacitor of the inverter. The photovoltaic system also includes a microcontroller unit (MCU) configured to control the DC converter to allow the photovoltaic module to operate at a maximum power point, and to increase, in a reverse boost mode, a voltage of the input capacitor of the inverter, to dissipate power from the input capacitor in the photovoltaic module, and the MPPT controller is configured to, based upon one or more triggers.

The invention provides a wind power system MPPT control device based on air speed measuring and estimating and a wind power system MPPT control method based on air speed measuring and estimating. A wind power system comprises a permanent magnet direct-drive wind power generator, a rectifier, a first capacitor, a second capacitor and a load. The MPPT control device comprises an MPPT controller, a wind speed sensor, a temperature sensor, an air pressure sensor, a rotating speed sensor, a voltage sensor, a current sensor, a DC-DC converter and a drive module. According to the wind power system MPPT control device based on air speed measuring and estimating and the wind power system MPPT control method based on air speed measuring and estimating, an air speed estimating signal and a ground air speed measuring signal are merged, the speed and accuracy for finding the maximum power point can be effectively improved, and power losses in the disturbance process are reduced.

The invention discloses a maximum power tracking device for a mini permanent magnetic direct drive wind power generation system and a control method in the technical field of wind power generation, wherein the maximum power tracking device comprises a fan, an MPPT (maximum power point tracking) controller, a rectifier, n air velocity transducers, a revolution speed transducer, a voltage transducer, a current transducer, a DC-DC (direct current to direct current) converter, a driver module, a first capacitor, a second capacitor and a load; the control method comprises the following steps of acquiring air velocity vectors by utilizing the air velocity transducers arranged at different positions, collecting a large number of air velocity vector-optimal revolution speed practical samples, establishing an air velocity-optimal revolution speed prediction model by utilizing a support vector machine, and carrying out the maximum power tracking by combining the prediction model with a small-step perturbation and observation method. The maximum power tracking device for the mini permanent magnetic direct drive wind power generation system and the control method, disclosed by the invention, have the advantages that the tracking speed is increased, and the power loss of a perturbation process is effectively reduced; after the characteristics of a fan changes, the prediction precision is ensured by repeatedly collecting samples and training a new prediction model.

The configurations of photovoltaic system and methods thereof are provided. The proposed photovoltaic system includes a PI-INC MPPT controller using a variable-frequency constant-duty (VFCD) control and guided by an Ipv-Vpv curve and a Ppv-Vpv curve.

The invention discloses an inverting control system and method based on grid drop testing in a photovoltaic power generation system. The method comprises the steps that a photovoltaic array converts solar energy into electric energy, a DC-DC converter carries out MPPT of the photovoltaic power generation system, and an inverter inverts direct current into high-quality alternating current to be sent to a grid; whether the grid drops or not is detected, and if the grid does not drop, an MPPT controller in a pre-controller works, and more energy is obtained from the photovoltaic array; if the grid drops, the MPPT controller in the pre-controller stops working, a first PI controller works, voltage of direct current bus keeps stable in the low-voltage ride through process, a grid-connected current feed unit provides reactive current, and the grid-connected current amplitude is kept constant. The inverting control system and method based on grid drop testing in the photovoltaic power generation system can reduce severe sudden changes of the voltage of the direct current bus in the low-voltage ride through process and prevent the grid-connected current from exceeding a flow value.

The invention provides a photovoltaic and diesel complementary power supply system based on a DC microgrid. The system comprises a photovoltaic power generation module, a first unidirectional isolated DC/DC converter, a DC bus and a load, which are connected in sequence. The first unidirectional isolated DC/DC converter is controlled by an MPPT controller. The system also comprises a storage battery module, a diesel generator module and an energy management system. The energy management system collects work states of all devices through the bus, and sends a scheduling instruction under a preset operation mode. The system can realize the purposes of optimizing operation of a power supply system, improving power generating income, prolonging device service life and enhancing power supply reliability and the like.

The embodiment of the invention discloses a photovoltaic grid-connected inverter and a photovoltaic grid-connected inverter control method, and the photovoltaic grid-connected inverter and the photovoltaic grid-connected inverter control method are used for improving the efficiency of a photovoltaic power generation system. The photovoltaic grid-connected inverter comprises a plurality of DC-DC converters, a DC-AC converter, a plurality of independent MPPT controllers and a concentrated MPPT controller. The independent MPPT controllers correspond to the DC-DC converters one by one. The independent MPPT controllers are used for achieving control over the input power of the DC-DC converters. The concentrated MPPT controller corresponds to the DC-AC converter. The concentrated MPPT controller is used for achieving control over the operation state of the DC-DC converters and the output power of the DC-AC converter. The output ends of the DC-DC converters are connected with the input end of the DC-AC converter after being connected in parallel. According to the photovoltaic grid-connected inverter and the photovoltaic grid-connected inverter control method, the concentrated MPPT controller can achieve control over the operation state of the DC-DC converters and the output power of the photovoltaic grid-connected inverter, and the efficiency of the photovoltaic power generation system is improved.

A PV electrical system includes a PV panel, a MPPT controller, a charge controller coupled to a battery and an inverter generating alternating current output based on a first charge controller output disposed within the PV panel. The system further includes an AC bus receiving the alternating current output, whereby any number of PV panels are connected to the AC bus for providing power output. In varying embodiments, the connectivity of the components provides for charging and controlling output of the battery, as well as managing power distribution across the AC bus, on a per-panel basis.

The invention discloses a wearable type thermoelectric power generation apparatus designed for power supply to low-power human body diagnosing equipment. The apparatus includes a thermoelectric power generation module, a flexible supercapacitor, an MPPT controller, an external interface and a wearable garment carrier. The thermoelectric power generation module utilizes the temperature difference between a human body and an external environment and converts the heat into electric energy. The flexible supercapacitor is used to store the generated electric energy. The MPPT controller utilizes the P & O algorithm to control the stable electric energy output of the flexible supercapacitor so that electric energy can be suitable to be provided to external electric appliances. The external interface is used to output the electric energy. According to the invention, the thermoelectric power generation module is embedded into the hole reserved in the wearable garment carrier. The heating end of the thermoelectric power generation module is in contact with the skin of a human body while the cold end is in contact with an external environment. The flexible supercapactior, the MPPT controller and the external interface are arranged in the sandwiched layer of the wearable garment carrier. In the invention, a semiconductor thermoelectric power generation module is combined with a garment, and through the different between the temperature of a human body and an external environment, electric energy is generated.

The invention provides a photovoltaic array maximum power point tracking (MPPT) controller based on a segmented model. The photovoltaic array MPPT controller is connected with a photovoltaic power generation system, so that the photovoltaic power generation system works in a maximum power output state; the photovoltaic power generation system comprises a photovoltaic array, a voltage and current measurement circuit and a direct current/direct current (DC/DC) conversion circuit; the photovoltaic array MPPT controller comprises a digital signal processor/micro control unit (DSP/MCU) controller and a control module based on the segmented model, wherein the DSP/MCU controller is connected with the voltage and current measurement circuit and the DC/DC conversion circuit; and the control module based on the segmented model runs on the DSP/MCU controller. In addition, the invention also provides a photovoltaic array MPPT controlling method based on the MPPT controller and the segmented model. Through the controller and the method, the working point of the photovoltaic array is accurately converged at a global maximum value, so that optimal control is realized.

The invention relates to a universal communication base station solar and wind energy centralized power supply system and a control method thereof and belongs to the field of new energy power generation technology and energy conservation. The communication base station new energy centralized power supply main loop and a communication base station monitor are used for providing a new energy power supply for the original base station alternating current and direct current power system. An embedded computer communication base station monitor consisting of a computer control technology and an artificial intelligent technology is adopted, and intelligent monitoring and control are realized. The designed solar maximum power point tracking (MPPT) controller and a wind energy controller can detect the power generating voltage of a solar panel and a wind energy generator, and the highest voltage value is tracked, so that the system has the highest efficiency. The designed inverter is based on the full-digital control technology of digital signal processor (DSP), a high-frequency sinusoidal pulse width modulation (SPWM) and an advanced insulated gate bipolar translator (IGBT) module, so that the system has high efficiency.

The invention discloses a distributed energy source system used for a solar unmanned aerial vehicle. The system is characterized by at least comprising a plurality of photovoltaic modules, a power optimizer electrically connected to each photovoltaic module, a high-voltage bus of 80V-120V and a low-voltage bus of 27V-29V, wherein each power optimizer comprises an MPPT controller and a DC-DC converter; an output terminal of each photovoltaic module is electrically connected to an input terminal of one DC-DC converter; a transmission conductor between the photovoltaic module and the DC-DC converter module is connected to the MPPT controller; after connected in series in sequence, the DC-DC converters are connected to the high-voltage bus of 80V-120V; after connected in series in sequence, the DC-DC converters are connected to a lithium ion battery series; and after connected in series in sequence, the DC-DC converters are connected to the low-voltage bus through one DC-DC converter. According to the system, the conversion efficiency of the photovoltaic modules can be improved.

The invention discloses a photovoltaic energy storage generating module based on Lyapunov switch coupling extremum searching. The photovoltaic energy storage generating module comprises a photovoltaic battery unit interface, a photovoltaic battery voltage equalization unit, an SEPIC feed buck-boost conversion unit, a lithium ion battery unit interface, a switching unit and a main control unit, wherein the SEPIC feed buck-boost conversion unit is connected with the photovoltaic battery voltage equalization unit in series; the switching unit is connected with the SEPIC feed buck-boost conversion unit and a lithium ion battery unit; and the main control unit is connected with the switching unit and a 2-Lyapunov extremum searching MPPT control sub unit. The 2-Lyapunov extremum searching MPPT control sub unit comprises a front-stage photovoltaic voltage equalization Lyapunov extremum searching MPPT control sub unit used for carrying out extremum searching on the photovoltaic battery voltage equalization unit, and a rear-stage SEPIC feed buck-boost Lyapunov extremum searching MPPT control sub unit used for carrying out extremum searching on the SEPIC feed buck-boost conversion unit. The front-stage photovoltaic voltage equalization Lyapunov extremum searching MPPT control sub unit and the rear-stage SEPIC feed buck-boost Lyapunov extremum searching MPPT control sub unit carry out extremum searching alternately.

The invention discloses an energy-saving central ventilation system which comprises an air outlet device for pumping indoor air to an outdoor place, an air inlet device for pumping outdoor air into an indoor place after the outdoor air is filtered and a power device used for providing electric energy. The power device comprises a solar photovoltaic assembly, an MPPT controller, a storage battery and an inverter; the output end of the solar photovoltaic assembly is connected with the input end of the MPPT controller, the output end of the MPPT controller is connected with the input end of the storage battery, the output end of the storage battery is connected with the input end of the inverter, and the two output ends of the inverter are connected with the air outlet device and the power input end of the air outlet device; and the solar photovoltaic assembly can convert optical energy into the electric energy and stores the electric energy into the storage battery, the inverter converts the generated direct current electric energy into alternating current and outputs the alternating current to the air outlet device and the air inlet device for use, and therefore solar energy is applied to the central ventilation system, and energy saving and environmental protection are better achieved.

The invention discloses a photovoltaic power generation microgrid system of energy internet, and belongs to the field of the new energy power generation and the microgrid. Compared with the traditional offline microgrid system, the photovoltaic power generation microgrid system can increase the power supply reliability of the system, and an energy storage unit can reduce the influence on the powergrid by the system. The photovoltaic power generation microgrid system is composed of a photovoltaic battery panel, a MPPT controller, an energy storage battery pack, an inverter, and a DC load. Themicrogrid system disclosed by the invention is the grid-connected operation system with the energy storage capacity, and has the capacity of regulating the grid-connected active power and the reactivepower distribution.