Hanwha Solutions Patente

Provided is a power conversion apparatus including an input circuit generating an input voltage, a buck-boost converter connected to the input circuit, a first full-bridge inverter and a second full-bridge inverter, which are connected to the buck-boost converter, at least one first inductor connected to the first full-bridge inverter, at least one second inductor connected to the second full-bridge inverter, an output circuit connected to the at least one first inductor and the at least one second inductor to generate an alternating current output voltage, and at least one processor configured to apply a first carrier signal and a reference signal to the first full-bridge inverter and applying a second carrier signal and the reference signal to the second full-bridge inverter, wherein the first full-bridge inverter operates based on the first carrier signal and the reference signal, and the second full-bridge inverter operates based on the second carrier signal and the reference signal.

A method of calculating load power of a power supply system includes obtaining a measured value of grid power and a measured value of energy storage system power, computing an offset between the measured value of the grid power and the measured value of the energy storage system power by controlling output power of an energy storage system, and calculating the load power based on the measured value of the grid power, the measured value of the energy storage system power, and the offset.

Provided are a method and apparatus for recording data of a solar power generation system. The method includes storing, in a first manner, first data about a state of at least one apparatus included in the solar power generation system before an event occurs in the at least one apparatus, in a buffer included in a power conversion system (PCS), storing, in a second manner, second data about a state of the at least one apparatus after the event has occurred, in the buffer, based on detecting the event, storing the first data and the second data in a persistent storage device included in the PCS and distinguished from the buffer, and transmitting data stored in the persistent storage device to an external device of the PCS.

A method of verifying reliability of sensing values may include obtaining inverter voltage sensing values and grid voltage sensing values, calculating voltage sensing value deviations based on differences between the inverter voltage sensing values and the grid voltage sensing values, and determining a voltage sensing value reliability level based on the voltage sensing value deviations and a reliability reference value for voltage sensing values.

Provided is an inverter including a main case, a heat dissipation case that covers one side of the main case and has a plurality of heat dissipation fins, a main plate arranged in an internal space defined by an assembly of the main case and the heat dissipation case, and a circuit board unit configured to mutually convert between direct current power and alternating current power and having a plurality of circuit boards, wherein some of the plurality of circuit boards are arranged below the main plate, and others of the plurality of circuit boards are arranged on the main plate.

Provided is a grid-connected distribution box (1) including a case (10) having an internal space, a first terminal block module (300) disposed in the internal space and having a control board (310) configured to control power distribution and a sub-input terminal (330) connected to at least one sub-power supply (E1), and a second terminal block module (400) disposed to partially overlap the first terminal block module (300) and having a neutral input terminal (410) connected to a neutral line.

Provided is a grid-connected distribution box including a case (10) having an internal space, a grid module (100) disposed in the internal space and having a main input terminal (110) to which main power is input, a control module (300) disposed adjacent to the grid module (100) and having a control board (310) connected to the grid module (100) and a sub-input terminal (330) to which at least one sub-power is input, a transformer (700) installed in the internal space, connected to the control board (310), and configured to convert a voltage, and a signal processing module (600) disposed on the transformer (700) to overlap the transformer (700), connected to the control board (310), and configured to process an electrical signal.

Provided is an inverter including a main case, a heat dissipation case that covers one side of the main case and has a plurality of heat dissipation fins, a circuit board unit arranged in an internal space defined by an assembly of the main case and the heat dissipation case, the circuit board unit having one or more circuit boards configured to mutually convert between direct current power and alternating current power, and a safety cover arranged in the internal space to cover the circuit board unit.

Provided is a grid-connected distribution box (1) including a case (10) having an internal space, a grid module (100) disposed in the internal space and having a main input terminal (110) to which main power is input, a control module (300) disposed adjacent to the grid module (100) and having a control board (310) connected to the grid module (100) and a sub-input terminal (330) connected to at least one sub-power supply, and a circuit breaker module (500) disposed in the internal space and having a plurality of circuit breakers (510) connected to the control board (310) and one or more brackets (5002, 5003) which fix the plurality of circuit breakers (510).

Provided are a method and apparatus for controlling switches included in an inverter of a power conversion system. A power conversion apparatus of a photovoltaic power generation system includes a processor configured to obtain a first current value at a first terminal of a filter included in an inverter from a single current sensor, obtain a second current value at a second terminal of the filter included in the inverter based on the first current value, and control a switch according to a pulse width modulation (PWM) method based on the first current value and the second current value.

Provided is a power conversion device including an input circuit configured to generate an input voltage, a first full-bridge inverter and a second full-bridge inverter each connected to the input circuit, at least one first inductor connected to the first full-bridge inverter, at least one second inductor connected to the second full-bridge inverter, an output circuit connected to the at least one first inductor and the at least one second inductor to generate an alternating current (AC) output voltage, and at least one processor configured to apply a first carrier signal and a control signal to the first full-bridge inverter, and apply a second carrier signal and the control signal to the second full-bridge inverter, wherein the first full-bridge inverter operates based on the first carrier signal and the control signal, and the second full-bridge inverter operates based on the second carrier signal and the control signal.

Provided is a power conversion apparatus. The power conversion apparatus includes an alternating current (AC)-direct current (DC) switched mode power supply (SMPS) configured to receive AC power from an AC power source and output DC power and a DC-DC SMPS configured to receive DC power supplied from each of one or more DC power sources and DC power output by the AC-DC SMPS, and supply DC power to one or more loads.

Provided is an inverter including a main case, a heat dissipation case that covers one side of the main case and has a plurality of heat dissipation fins, and a circuit board unit arranged in an internal space defined by an assembly of the main case and the heat dissipation case, the circuit board unit having at least one circuit board configured to mutually convert between direct current power and alternating current power, wherein the heat dissipation case includes a support block protruding toward the internal space and on which the circuit board is arranged.

Provided are a method and apparatus for predicting a current of a load (550) in an autotransformer (540). A processor is configured to obtain a value of a current of a first input terminal (520) and a value of a current of a first stage of an autotransformer (530), predict whether a plurality of loads are unbalanced, based on the value of the current of the first input terminal (520), the value of the current of the first stage (530), and a characteristic of the autotransformer (540), and determine whether to open a relay (510), based on a result of the prediction and a current flowing through the autotransformer (540), wherein a turn ratio of the autotransformer (540) is 1.

Provided is a curve point extraction method including receiving a power control requirement specification for controlling a grid-connected inverter from a server, determining whether a required function included in the power control requirement specification is included in a preset function, determining whether a number of candidate points included in the power control requirement specification satisfies a minimum number corresponding to the required function, determining whether a range of the candidate points satisfies an allowable range of curve points corresponding to the required function, and sorting the candidate points and extracting the curve points based on a curve point extraction algorithm corresponding to the required function.

A voltage balancer and a method of driving the same are provided. The method includes sensing a first voltage between two terminals of an inverter, a second voltage between one of the two terminals of the inverter and a neutral point located between the two terminals of the inverter, and a third voltage between the other of the two terminals of the inverter and the neutral point based on a power supply system is in an off-grid state; turning on at least one switch pair among a plurality of switches included in the voltage balancer based on the first voltage; controlling a duty ratio of each driving switch that is not turned on among the plurality of switches, based on a result of comparing the second voltage with the third voltage; and driving each driving switch based on the controlled duty ratio.

Provided is an inverter including a main case, a heat dissipation case that covers one side of the main case and has a plurality of heat dissipation fins, a circuit board unit arranged in an internal space defined by an assembly of the main case and the heat dissipation case, the circuit board unit having one or more circuit boards configured to mutually convert between direct current power and alternating current power, and a fixing member that connects the main case to an external storage device.

Provided are a charging circuit and a power supply including the same. The charging circuit includes a charging unit connected to a power source and a load, and configured to receive an input voltage applied from the power source, a current limiting unit connecting the power source to the charging unit, and an electronic fuse connecting the power source to the charging unit in parallel with the current limiting unit.

An inverter for an energy storage system includes a main case having an internal space and installed in an external structure, a circuit board disposed in the internal space and configured to interconvert direct current power and alternating current power into each other, a heat dissipation case disposed to cover the main case and protruding along a first direction, and a hood cover surrounding the heat dissipation case and connected to the main case.

A disclosed solar cell module press apparatus includes a first plate configured to be brought into contact with one side of a solar cell module to support the solar cell module, a second plate configured to be brought into contact with the other side of the solar cell module and move toward the first plate to press the solar cell module, a first cylinder actuator configured to move the second plate toward the first plate until the second plate is brought into contact with the solar cell module, and a second cylinder actuator configured to press the second plate toward the first plate so that the solar cell module is pressed after the second plate is brought into contact with the solar cell module.

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