A power supply system which connects a DC consumer to an AC supply includes an AC-DC converter and a UPS. The AC-DC converter has an input to which alternating current from the AC supply is applied and an output at which DC current is developed. The UPS has an input to which direct current from the AC-DC converter is applied and an output at which DC current is developed. The DC current developed at the output of the AC-DC converter and DC current developed at the output of the UPS are applied to the DC consumer selectively in parallel with each other or exclusively to each other.

A method and radio base station for handling a power disturbance caused by a radio unit of the radio base station. The method comprises: obtaining scheduling information of data traffic associated with the RU; comparing the power disturbance with one or more first thresholds, wherein the power disturbance is caused by the RU adapted to handle the data traffic according to the scheduling information; and adjusting a switching frequency of a direct current to direct current, DC/DC, converter based on the comparison, wherein the DC/DC converter is comprised in the RU to power the RU.

A method and radio base station for handling a power disturbance caused by a radio unit of the radio base station. The method comprises: obtaining scheduling information of data traffic associated with the RU; comparing the power disturbance with one or more first thresholds, wherein the power disturbance is caused by the RU adapted to handle the data traffic according to the scheduling information; and adjusting a switching frequency of a direct current to direct current, DC/DC, converter based on the comparison, wherein the DC/DC converter is comprised in the RU to power the RU.

Modular system of interfacing consumer electronics devices. The system includes a powered base hub and additional modular components with interface couplers providing electrical continuity between modules. Data transmission between modules may be through the interface couplers or wireless. The system includes a power cord for providing power to the base or wireless pad, but it need not include any additional power or data cords or cables.

Modular system of interfacing consumer electronics devices. The system includes a powered base hub and additional modular components with interface couplers providing electrical continuity between modules. Data transmission between modules may be through the interface couplers or wireless. The system includes a power cord for providing power to the base or wireless pad, but it need not include any additional power or data cords or cables.

A detection of a failure of a phase (as a method and apparatus) in a system—supplied by multiple phases—including a DC link (5) is suggested. A rectified voltage (10) of the DC link (5) pulses at a multiple of the mains frequency as a fundamental wave. The rectified voltage (10) is filtered for detecting a signal component at the double frequency of the mains frequency (12). The rectified voltage (10) is also “filtered” for detecting an average link voltage (14). A ratio signal (17) is formed as a ratio of the average link voltage (14) to the signal component at the double frequency of the mains frequency (12). An error detection signal (19) results from a comparison of the ratio signal (17) with an error threshold (20).

A method and radio base station for handling a power disturbance caused by a radio unit of the radio base station. The method comprises: obtaining scheduling information of data traffic associated with the RU; comparing the power disturbance with one or more first thresholds, wherein the power disturbance is caused by the RU adapted to handle the data traffic according to the scheduling information; and adjusting a switching frequency of a direct current to direct current, DC/DC, converter based on the comparison, wherein the DC/DC converter is comprised in the RU to power the RU.

A method and radio base station for handling a power disturbance caused by a radio unit of the radio base station. The method comprises: obtaining scheduling information of data traffic associated with the RU; comparing the power disturbance with one or more first thresholds, wherein the power disturbance is caused by the RU adapted to handle the data traffic according to the scheduling information; and adjusting a switching frequency of a direct current to direct current, DC/DC, converter based on the comparison, wherein the DC/DC converter is comprised in the RU to power the RU.

A direct current power system. The direct current power system includes a direct current bus system, a solar power system, an energy storage system, a wind power system, a rectifier system and an inverter system. The solar power system includes a plurality of solar panels, is electrically coupled to the energy storage system and is configured to supply a first direct current power at 48 volts. The energy storage system includes a plurality of battery stacks and is configured to supply a second direct current power at 380 volts to the direct current bus system. The wind power system includes at least one wind turbine assembly and is configured to supply a third direct current power at 380 volts to the direct current bus system. The rectifier system is configured to supply a fourth direct current power at 380 volts to the direct current bus system.

A system for controlling a plurality of power converters in a power system so as to turn each of the plurality of power converters into an ON state or an OFF state as a function of a sensed input power and a sensed output power such that one or more of the plurality of power converters in the ON state are operating in an optimal power efficiency range.