Abstract: A power device and an energy storage converter are provided. The power device includes a liquid cooling plate, a power semiconductor device, a first copper bar, and a laminated busbar. The liquid cooling plate includes a first side, a second side, a third side, and a fourth side. The power semiconductor device is arranged at the third side of the liquid cooling plate. The driving board is arranged at the third side of the liquid cooling plate and connected to the power semiconductor device. One end of the first copper bar is connected to the power semiconductor device, and an AC side interface is formed in the other end of the first copper bar and is arranged at the first side of the liquid cooling plate.

Abstract: An energy storage converter, a control method and device for the energy storage converter, and a computer readable storage medium are provided. The control method includes: obtaining an operation state of a power grid; under the condition that the power grid operates in a normal state, controlling the energy storage converter to operate in a grid-connected mode; and under the condition that the power grid operates in an abnormal state, controlling the energy storage converter to operate in an island mode. In the grid-connected mode, the energy storage converter uses active power and reactive power decoupling control. In the island mode, the energy storage converter uses virtual magnetic flux control.

Abstract: A high-power-density modular energy storage converter is provided. The converter includes a cabinet divided into a first region, a second region and a third region. The cabinet includes a foundation slab, a front structure, a middle structure and a rear structure. The front structure is arranged in the first region. The middle structure is arranged in the second region. The rear structure is arranged in the third region. The front structure includes a power device and a first air-water heat exchanger. The middle structure includes an electric reactor device, a DC magnetic ring device, an AC magnetic ring device and an AC filter capacitor. The rear structure includes a DC contactor, an AC circuit breaker, an AC pluggable connector, a DC fast fuse device and a DC pluggable connector.

Abstract: A bidirectional energy storage converter and an energy storage system are provided. The bidirectional energy storage converter includes at least one bridge arm. Each bridge arm includes a first switching circuit, a second switching circuit and a third switching circuit. A first end of the first switching circuit is connected to a positive electrode of a direct-current busbar and a second end is connected to a neutral point of the direct-current busbar. A first end of the second switching circuit is connected to the neutral point of the direct-current busbar, and a second end is connected to a negative electrode of the direct-current busbar. A first end of the third switching circuit is connected to a third end of the second switching circuit, a second end is connected to a third end of the first switching circuit, and a third end is connected to an alternating-current busbar.

Abstract: A bidirectional energy storage converter is provided. The converter includes multiple bridge arms, each including a first switch assembly, a second switch assembly, a third switch assembly and a fourth switch assembly, sequentially connected in series. The first switch assembly is connected to a positive electrode of a direct-current busbar and a third end of a resistor assembly. The fourth switch assembly is connected to a negative electrode of the direct-current busbar and a fourth end of the resistor assembly. One end of a branch formed by connecting a fifth switch assembly and a sixth switch assembly in series is connected to a connection point of the first switch assembly and the second switch assembly, and a first end of the resistor assembly. Another end is connected to a connection point of the third switch assembly and the fourth switch assembly, and a second end of the resistor assembly.

Abstract: An energy storage converter, a control method and device for the energy storage converter, and a computer readable storage medium are provided. The control method includes: obtaining an operation state of a power grid; under the condition that the power grid operates in a normal state, controlling the energy storage converter to operate in a grid-connected mode; and under the condition that the power grid operates in an abnormal state, controlling the energy storage converter to operate in an island mode. In the grid-connected mode, the energy storage converter uses active power and reactive power decoupling control. In the island mode, the energy storage converter uses virtual magnetic flux control.