Abstract: The present disclosure pertains to devices, systems, and methods for monitoring a direct current (DC) system. In one specific embodiment, a system may include a centralized protection and control (CPC) system. The CPC system may include a DC interface configured to be in electrical communication with a first DC system and a communication subsystem configured to receive a first measurement, from a remote device, of at least one electrical parameter of the first DC system. The CPC system may also include a DC monitor subsystem to generate a second measurement of at least one electrical parameter of the first DC system based on the electrical communication between the DC interface and the first DC system and generate a comparison of the first measurement and the second measurement. An action subsystem may generate an action based on the comparison between the first measurement and the second measurement.

Abstract: A hybrid battery includes a converter, a controller, a power source, and an ultracapacitor configured to be discharged. The converter is operable to receive a control signal and to regulate a current level that is allowed to be drawn from the power source to charge the ultracapacitor in accordance with the control signal. The controller is operable to generate and provide the control signal to the converter. The controller is operable to generate the control signal based at least in part on a measure of the voltage level of the ultracapacitor and a measure current being drawn to charge the ultracapacitor.

Abstract: A hybrid battery includes a converter, a controller, a power source, and an ultracapacitor configured to be discharged. The converter is operable to receive a control signal and to regulate a current level that is allowed to be drawn from the power source to charge the ultracapacitor in accordance with the control signal. The controller is operable to generate and provide the control signal to the converter. The controller is operable to generate the control signal based at least in part on a measure of the voltage level of the ultracapacitor and a measure current being drawn to charge the ultracapacitor.