Lsis Co., Ltd.

Ji-Hong Kim

Ji-Heon Lee

Dong-Jin Yun

Min-Jae Kim

Yun-Jae Lee

The energy storage system according to one embodiment comprises a first converter connected between the system and the DC distribution network, and converting an AC voltage of the system into a DC voltage and transmitting the DC voltage to the DC distribution network; a second converter connected to the DC distribution network and controlling the voltage of the DC distribution network; a battery connected to the second converter and of which the charging and discharging are controlled by the second converter; a third converter connected to the DC distribution network; and a first load connected to the third converter and of which the voltage is controlled by means of the third converter, wherein the first converter generates a power control instruction for controlling at least one of the battery and the first load on the basis of SOC information of the battery and power consumption information of the first load.

Energy storage system

Disclosed is an uninterruptible power supply system comprising an energy storage system (ESS). The uninterruptible power supply system comprises an ESS and is connected to a grid, and further comprises: a first converter for converting an alternating current voltage of the grid into a direct current voltage; a second converter connected in series to the first converter, for converting the direct current voltage outputted from the first converter into an alternating current voltage and transferring same to a load; the ESS comprising a battery connected to a node between the first and second converter, for performing charging and discharging; and a PLC for receiving the operation statuses of the first and second converters, and on the basis thereof, controlling the operation of the uninterruptible power supply system, wherein the PLC determines the operation mode of the ESS by using the received operation statuses of the first and second converters.

Uninterruptible power supply system comprising energy storage system

The present invention relates to a hybrid energy storage system. The hybrid energy storage system according to an embodiment of the present invention manages the power of a system and a direct current (DC) distribution network connected to the system, and comprises: a first DC-DC converter connected to the DC distribution network; a super capacitor connected to the first DC-DC converter and having the charge and discharge thereof controlled by the first DC-DC converter; a second DC-DC converter connected to the DC distribution network; and a battery connected to the second DC-DC converter and having the charge and discharge thereof controlled by the second DC-DC converter, wherein the first DC-DC converter comprises a DC distribution network stabilization controller, which filters the noise of a system voltage applied to the DC distribution network, and then generates a damping current so as to stabilize the DC distribution network.

Growing community of inventors

Anyang-si, South Korea

Ji-Hong Kim