Smart meter socket adapter for connecting batter energy storage system

An energy management system (EMS) device for managing a meter socket adapter (MSA), the MSA comprising a housing matching an electricity meter and a meter socket;

• a plurality of power conductors that connect among the electricity meter, the meter socket, and a battery energy storage system (BESS);
• a meter interconnection device (MID) switch for connecting a utility grid or one or more distribution energy resource (DER) devices to supply power to household loads in the household microgrid;
• a MID driving circuit for driving the MID switch to close or open;
• and a meter detection circuit for detecting insertion and removal of the electricity meter,
• the EMS device comprising:
• an EMS controller configured to:
• control the MID switch disposed inside the MSA to respond to occurrence and restoration of an outage of the utility grid;
• and
• control the one or more DER devices to supply power to the household loads in the MSA connected the household microgrid to optimize household energy consumption and generation;
• and
• an MID controller configured to:
• monitor a state of the utility grid and a state of the household microgrid;
• based on the state of the utility grid and the state of the household microgrid, control the MID switch to make suitable electrical connections among the utility grid, the one or more DER devices, and the household loads in the household microgrid,
• wherein:
• the one or more DERs include the BESS and the photovoltaic power generator;
• the EMS controller communicates with the BESS but does not communicate with the photovoltaic power generator;
• a disconnection device is arranged at an output of the photovoltaic power generator and is controlled by the EMS controller;
• in response to output power of the photovoltaic power generator being greater than a maximum charging power of charging batteries of the BESS, the EMS controller is further configured to control the disconnection device to disconnect the photovoltaic power generator;
• and
• in response to the output power of the photovoltaic power generator being smaller than the maximum charging power of charging batteries of the BESS, the EMS controller is further configured to control the disconnection device to re-connect the photovoltaic power generator.

An energy management system (EMS) device for managing a meter socket adapter (MSA), the MSA comprising a housing matching an electricity meter and a meter socket;

• a plurality of power conductors that connect among the electricity meter, the meter socket, and a battery energy storage system (BESS);
• a meter interconnection device (MID) switch for connecting a utility grid or one or more distribution energy resource (DER) devices to supply power to household loads in the household microgrid;
• a MID driving circuit for driving the MID switch to close or open;
• and a meter detection circuit for detecting insertion and removal of the electricity meter,
• the EMS device comprising:
• an EMS controller configured to:
• control the MID switch disposed inside the MSA to respond to occurrence and restoration of an outage of the utility grid;
• and
• control the one or more DER devices to supply power to the household loads in the MSA connected the household microgrid to optimize household energy consumption and generation;
• and
• an MID controller configured to:
• monitor a state of the utility grid and a state of the household microgrid;
• based on the state of the utility grid and the state of the household microgrid, control the MID switch to make suitable electrical connections among the utility grid, the one or more DER devices, and the household loads in the household microgrid,
• wherein:
• the one or more DERs include the BESS and the standby generator;
• the EMS controller communicates with the BESS and the standby generator;
• a generator access circuit is arranged at an output of the standby generator;
• in response to the occurrence of the outage of the utility grid, the EMS controller is further configured to control the MID switch to disconnect between the utility grid and the household microgrid, notify the BESS to supply power to the household loads, and retrieve a state of charge (SOC) of batteries of the BESS;
• in response to the SOC being smaller than a predetermined capacity threshold, the EMS controller is further configured to turn on the standby generator, detect that an output of the standby generator is normal, notify the BESS to synchronize its output with the output of the standby generator, and control the generator access circuit to connect the standby generator, the standby generator supplying power to the household loads and at the same time charging the batteries of the BESS;
• in response to the standby generator stopping generating power, the EMS controller is further configured to control the generator access circuit to disconnect the standby generator, and notify the BESS to supply power to the household loads;
• and
• in response to the restoration of the outage of the utility grid, the EMS controller is further configured to control the generator access circuit to disconnect the standby generator, notify the BESS to supply power to the household loads and synchronize its output with the output of the utility grid, control the MID switch to re-connect between the utility grid and the household microgrid after the BESS output and the utility grid output are synchronized, and turn off the standby generator.