Energy storage converter, and energy storage system

An energy storage converter, comprising:

• a direct current (DC) switching power supply circuit coupled to a DC side port of the energy storage converter and configured to provide a first power supply using DC power from the DC side port;
• an alternating current (AC) switching power supply circuit coupled to an AC side port of the energy storage converter and configured to provide a second power supply using AC power from the AC side port;
• a power supply circuit coupled to the DC switching power supply circuit and the AC switching power supply circuit, the power supply circuit being configured to supply power to the energy storage converter using the first power supply or the second power supply;
• and
• a control circuit coupled to the DC switching power supply circuit and the AC switching power supply circuit, the control circuit being configured to, based on an operation state of the energy storage converter, control the DC switching power supply circuit or the AC switching power supply circuit to provide the power supply circuit with power supply.