Hanwha Solutions

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.

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 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 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 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 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.

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.