Box-type substation, energy storage power supply system, and photovoltaic power generation system

An energy storage power supply system, comprising an energy storage apparatus, an energy storage converter, and the box-type substation which comprises

• a low-voltage cabinet that comprises a first circuit breaker and a second circuit breaker;
• a high-voltage cabinet that comprises a disconnector;
• a transformer,
• a first keychain configured to switch on or switch off the first circuit breaker;
• and
• a second keychain configured to switch on or switch off the second circuit breaker, wherein the first circuit breaker is configured to control connection or disconnection between a low-voltage input of the box-type substation and one low-voltage winding of the transformer, the second circuit breaker is configured to control connection or disconnection between the low-voltage input of the box-type substation and the other low-voltage winding of the transformer, and the disconnector is configured to control connection or disconnection between a high-voltage winding of the transformer and an output of the box-type substation;
• when the first circuit breaker is switched on, the first keychain is locked at the first circuit breaker,
• when the second circuit breaker is switched on, the second keychain is locked at the second circuit breaker, and
• when the first circuit breaker and the second circuit breaker are both switched off, the first keychain and the second keychain are configured to simultaneously switch off the disconnector and are both locked at the disconnector.

A photovoltaic power generation system, comprising an inverter and the box-type substation which comprises

• a low-voltage cabinet that comprises a first circuit breaker and a second circuit breaker;
• a high-voltage cabinet that comprises a disconnector;
• a transformer,
• a first keychain configured to switch on or switch off the first circuit breaker;
• and
• a second keychain configured to switch on or switch off the second circuit breaker, wherein the first circuit breaker is configured to control connection or disconnection between a low-voltage input of the box-type substation and one low-voltage winding of the transformer, the second circuit breaker is configured to control connection or disconnection between the low-voltage input of the box-type substation and the other low-voltage winding of the transformer, and the disconnector is configured to control connection or disconnection between a high-voltage winding of the transformer and an output of the box-type substation;
• when the first circuit breaker is switched on, the first keychain is locked at the first circuit breaker,
• when the second circuit breaker is switched on, the second keychain is locked at the second circuit breaker,
• when the first circuit breaker and the second circuit breaker are both switched off, the first keychain and the second keychain are configured to simultaneously switch off the disconnector and are both locked at the disconnector;
• wherein the inverter is configured to:
• convert a received direct current into an alternating current and output the alternating current to the box-type substation, and the box-type substation is configured to:
• perform voltage boosting processing on the alternating current output by the inverter and output an alternating current obtained through voltage boosting processing to a power grid.