Abstract: A power output control and compensation (PCC) circuit operates within a distributed energy resource (DER) system. The PCC circuit is located in a battery power conversion system (PCS) and includes an input terminal to connect with a power source and an output terminal to connect with an electrical panel or load. A current sensing device is coupled between the input and the output terminals to measure a power level of the power source. A relay is coupled between the current sensing device and the output terminal and a processor selectively connects power from the power source to the electrical panel or the load based on the measured power level or based on other power measurements within the DER system. PCS-control of multiple power sources decreases cycle times for controlling distributed energy resources.

Abstract: A power output control and compensation (PCC) circuit operates within a distributed energy resource (DER) system. The PCC circuit is located in a battery power conversion system (PCS) and includes an input terminal to connect with a power source and an output terminal to connect with an electrical panel or load. A current sensing device is coupled between the input and the output terminals to measure a power level of the power source. A relay is coupled between the current sensing device and the output terminal and a processor selectively connects power from the power source to the electrical panel or the load based on the measured power level or based on other power measurements within the DER system. PCS-control of multiple power sources decreases cycle times for controlling distributed energy resources.

Abstract: A power output control and compensation (PCC) circuit operates within a distributed energy resource (DER) system. The PCC circuit is located in a battery power conversion system (PCS) and includes an input terminal to connect with a power source and an output terminal to connect with an electrical panel or load. A current sensing device is coupled between the input and the output terminals to measure a power level of the power source. A relay is coupled between the current sensing device and the output terminal and a processor selectively connects power from the power source to the electrical panel or the load based on the measured power level or based on other power measurements within the DER system. PCS-control of multiple power sources decreases cycle times for controlling distributed energy resources.

Abstract: An automatic battery recovery system includes a power conversion system (PCS) coupled between an AC power line and a DC power bus. The PCS is configured to convert between DC power from a battery system and AC power from the AC power line. An automatic recovery control (ARC) circuit is coupled in parallel with the PCS between the AC power line and the DC power bus. The ARC circuit is configured to convert AC power from the AC power line into DC power for powering the PCS based on a state-of-charge (SOC) of the battery system. The PCS includes an inverter coupled between the AC power line and the battery system and a digital signal processor (DSP) configured to command the inverter to charge the battery system from the AC power line while the DSP is being powered through the ARC circuit.

Abstract: A power conversion system (PCS) seamlessly transitions between different control modes. A digital signal processor (DSP) may operate in a first control mode where a first setpoint for operating the inverter is associated with a first one of the AC power, DC voltage, or DC current. The DSP then seamlessly transitions into a second control mode where a second setpoint used for operating the inverter is associated with second one of the AC power, DC voltage, and DC current. The DSP also may seamlessly transition from the first or second control mode to an off-grid mode by operating the inverter based on an AC voltage setpoint generated by the inverter. The seamless control mode transitions allow the PCS to more effectively control the inverter output using feedback parameters other than just the output power.

Abstract: An automatic battery recovery system includes a power conversion system (PCS) coupled between an AC power line and a DC power bus. The PCS is configured to convert between DC power from a battery system and AC power from the AC power line. An automatic recovery control (ARC) circuit is coupled in parallel with the PCS between the AC power line and the DC power bus. The ARC circuit is configured to convert AC power from the AC power line into DC power for powering the PCS based on a state-of-charge (SOC) of the battery system. The PCS includes an inverter coupled between the AC power line and the battery system and a digital signal processor (DSP) configured to command the inverter to charge the battery system from the AC power line while the DSP is being powered through the ARC circuit.

Abstract: A pre-charge circuit includes an input configured to connect to a DC power source, an output configured to connect to the input of an inverter, and a capacitor coupled to the output. A resistive branch in the pre-charge circuit includes a pre-charge switch and a limiting resistor coupled in series between the input and the output. A shunting branch in the pre-charge circuit is coupled in parallel with the resistive branch and includes one or more solid-state switches connected between the input and the output. A digital signal processor (DSP) controls the pre-charge switch enabling the DC power source to charge the capacitor through the resistive branch and activates the solid-state switches after charging the capacitor, shunting the output of the DC power source to the input of the inverter. Solid-state switching in the pre-charge circuit improves control and reliability compared to mechanical contact approaches.

Abstract: A power output control and compensation (PCC) circuit operates within a distributed energy resource (DER) system. The PCC circuit is located in a battery power conversion system (PCS) and includes an input terminal to connect with a power source and an output terminal to connect with an electrical panel or load. A current sensing device is coupled between the input and the output terminals to measure a power level of the power source. A relay is coupled between the current sensing device and the output terminal and a processor selectively connects power from the power source to the electrical panel or the load based on the measured power level or based on other power measurements within the DER system. PCS-control of multiple power sources decreases cycle times for controlling distributed energy resources.

Abstract: A power conversion system (PCS) seamlessly transitions between different control modes. A digital signal processor (DSP) may operate in a first control mode where a first setpoint for operating the inverter is associated with a first one of the AC power, DC voltage, or DC current. The DSP then seamlessly transitions into a second control mode where a second setpoint used for operating the inverter is associated with second one of the AC power, DC voltage, and DC current. The DSP also may seamlessly transition from the first or second control mode to an off-grid mode by operating the inverter based on an AC voltage setpoint generated by the inverter. The seamless control mode transitions allow the PCS to more effectively control the inverter output using feedback parameters other than just the output power.