A power conversion device includes a power converter including a semiconductor module, to convert input power and output the converted power, and a capacitor electrically connected to the semiconductor module. The capacitor includes a capacitor-side terminal surface on which a capacitor-side terminal is arranged, and the capacitor-side terminal surface faces a module-side terminal surface of the semiconductor module.

A power conversion device includes a power converter including a semiconductor module, to convert input power and output the converted power, and a capacitor electrically connected to the semiconductor module. The capacitor includes a capacitor-side terminal surface on which a capacitor-side terminal is arranged, and the capacitor-side terminal surface faces a module-side terminal surface of the semiconductor module.

A modified modulated wave acquisition method includes: obtaining a modulated wave u.sub.aba; calculating a difference between the given value i.sub.Nq* and the actual value i.sub.Nq of the q-axis component of a grid side current, inputting the result to a proportional integral (PI) controller, and multiplying an output of the PI controller by cos ωt to obtain a modulated wave offset Δu.sub.aba; and calculating a difference between the modulated wave u.sub.aba and the modulated wave offset Δu.sub.aba to obtain a modified modulation wave u.sub.aba′, where ωt is a grid voltage phase in a sinusoidal case. The MPC method for a single-phase cascaded H-bridge rectifier includes: obtaining the modified modulated wave u.sub.aba′, where the component i.sub.Nq* is 0; and replacing the modulated wave u.sub.aba with the modified modulated wave u.sub.aba′ to perform MPC for the single-phase cascaded H-bridge rectifier.

A modified modulated wave acquisition method includes: obtaining a modulated wave u.sub.aba; calculating a difference between the given value i.sub.Nq* and the actual value i.sub.Nq of the q-axis component of a grid side current, inputting the result to a proportional integral (PI) controller, and multiplying an output of the PI controller by cos ωt to obtain a modulated wave offset Δu.sub.aba; and calculating a difference between the modulated wave u.sub.aba and the modulated wave offset Δu.sub.aba to obtain a modified modulation wave u.sub.aba′, where ωt is a grid voltage phase in a sinusoidal case. The MPC method for a single-phase cascaded H-bridge rectifier includes: obtaining the modified modulated wave u.sub.aba′, where the component i.sub.Nq* is 0; and replacing the modulated wave u.sub.aba with the modified modulated wave u.sub.aba′ to perform MPC for the single-phase cascaded H-bridge rectifier.

An adapter device, including an AC connection including first AC contact and second AC contact; a DC connection including first DC contact and second DC contact; a first bridge branch including first switching device and second switching device, the first switching device and second switching device connected in series at a first bridge point, the first bridge point connected to first AC contact; a second bridge branch including third switching device and fourth switching device, third switching device and fourth switching device connected in series at a second bridge point, the second bridge point connected to second AC contact; and mode-setting device configured to predetermine a direction of power flow between AC connection and/or DC connection, first bridge branch and second bridge branch connected in parallel to the first DC contact and second DC contact, and different types of switching devices used as switching devices of a bridge branch.

An adapter device, including an AC connection including first AC contact and second AC contact; a DC connection including first DC contact and second DC contact; a first bridge branch including first switching device and second switching device, the first switching device and second switching device connected in series at a first bridge point, the first bridge point connected to first AC contact; a second bridge branch including third switching device and fourth switching device, third switching device and fourth switching device connected in series at a second bridge point, the second bridge point connected to second AC contact; and mode-setting device configured to predetermine a direction of power flow between AC connection and/or DC connection, first bridge branch and second bridge branch connected in parallel to the first DC contact and second DC contact, and different types of switching devices used as switching devices of a bridge branch.

Herein provided is a controller for a current inverter. The controller comprises a reference generator configured for obtaining source voltage and current values from an electrical source, generating a voltage error function based on source and reference voltages, and generating a current error function based on source and reference currents. The controller also comprises an output controller for receiving from the reference generator the voltage and current error functions and configured for producing at least one control signal based on the voltage and current error functions. The controller also comprises a state feedback controller configured for: adjusting the at least one control signal, based on parameters of the electrical source, to produce at least one adjusted control signal, and outputting the at least one adjusted control signal to the current inverter.

An electrical energy storage module is provided. The storage module includes a reversible electrical energy conversion device intended to be connected to an electrical energy source and an electrical energy storage device. The storage device includes a first branch including two filter capacitors in series, and a second branch including two identical electrical energy storage means connected in series. A node common to the two capacitors and a node common to the two energy storage means are coupled by an impedance. A first end of the first and second branches is connected to the electrical energy conversion device, and a second end of the first and second branches is connected to the electrical energy conversion device.

An electrical energy storage module is provided. The storage module includes a reversible electrical energy conversion device intended to be connected to an electrical energy source and an electrical energy storage device. The storage device includes a first branch including two filter capacitors in series, and a second branch including two identical electrical energy storage means connected in series. A node common to the two capacitors and a node common to the two energy storage means are coupled by an impedance. A first end of the first and second branches is connected to the electrical energy conversion device, and a second end of the first and second branches is connected to the electrical energy conversion device.

A power conversion apparatus 1 has an inverter for converting DC power into AC power. This control device for the power conversion apparatus includes: a current limiting unit for limiting a target current value to a predetermined limit value or less when the target current value is greater than the limit value; and a control unit for controlling the inverter on the basis of the target current value after the current limiting performed by the current limiting unit.