A supplemental power source connectable to a standard railroad track switch power source. A pair of electrical connectors (A) form a supplemental power source circuit input. Another pair of electrical connectors (B) form a supplemental power source output and are configured for connection to a standard railroad track switch. An electrical conductor connects a first one of the supplemental power source output connectors (B) to a first one of the supplemental power source input connectors (A). A diode is connected between a second one of the supplemental power source input connectors (A) and a second one of the supplemental power source output connectors (B). The diode is connected to prevent current flow to the standard railroad track switch power source. An ultracapacitor is electrically connected between the electrical conductor and the second one of the supplemental power source output connectors (B).

A smart power system is described. In one or more implementations, the smart power system comprises a microcontroller and a power converter electrically connected to the microcontroller and is configured to convert electrical energy from one form to another. The system also includes a switch element electrically connected to the microcontroller and configured to control distribution of the converted electrical energy to an electrical load. A sense element is electrically connected to the electrical load and to the microcontroller and is configured to monitor the converted electrical energy distributed to the electrical load and to furnish a feedback signal based upon the converted electrical energy. The microcontroller is configured to verify and to monitor the power converter, as well as to control and to monitor distribution of the converted electrical energy to the electrical load based upon the feedback signal.

A smart power system is described. In one or more implementations, the smart power system comprises a microcontroller and a power converter electrically connected to the microcontroller and is configured to convert electrical energy from one form to another. The system also includes a switch element electrically connected to the microcontroller and configured to control distribution of the converted electrical energy to an electrical load. A sense element is electrically connected to the electrical load and to the microcontroller and is configured to monitor the converted electrical energy distributed to the electrical load and to furnish a feedback signal based upon the converted electrical energy. The microcontroller is configured to verify and to monitor the power converter, as well as to control and to monitor distribution of the converted electrical energy to the electrical load based upon the feedback signal.

A voltage stabilizing system of a switching direct current (DC) power supply equipment is provided. DC power outputted by battery modules and a rectifier is boosted, bucked, or boosted and bucked by a voltage stabilizer circuit, and is then distributed to a plurality of external electronic devices or the battery modules. The voltage stabilizer circuit includes a main voltage stabilizer circuit and one or more slave voltage stabilizer circuits. The main voltage stabilizer circuit controls the slave voltage stabilizer circuits, and distributes the DC power respectively to the main voltage stabilizer circuit and the slave voltage stabilizer circuits. Circuit boards of the main voltage stabilizer circuit and the slave voltage stabilizer circuits are pluggably installed in a machine cabinet of the switching direct current power supply equipment.

Disclosed is a device for controlling a terminal connected in a multi-terminal high-voltage direct current transmission facility, the terminal being able to provide or draw power on the DC part of the facility comprised between an upper power limit and a lower power limit, the device further comprising at least one regulation circuit configured to vary the power provided or drawn by the terminal on the DC part of the facility, as a function of a voltage variation on the DC part of the facility, the device further comprising a limitation circuit configured to limit the variation of the power provided or drawn by the terminal, for a given voltage variation, when the power difference between the power provided or drawn by said terminal and the upper power limit or the lower power limit becomes smaller than a determined value.

Disclosed is a device for controlling a terminal connected in a multi-terminal high-voltage direct current transmission facility, the terminal being able to provide or draw power on the DC part of the facility comprised between an upper power limit and a lower power limit, the device further comprising at least one regulation circuit configured to vary the power provided or drawn by the terminal on the DC part of the facility, as a function of a voltage variation on the DC part of the facility, the device further comprising a limitation circuit configured to limit the variation of the power provided or drawn by the terminal, for a given voltage variation, when the power difference between the power provided or drawn by said terminal and the upper power limit or the lower power limit becomes smaller than a determined value.

An electronic device for series connection on a power supply line includes a plurality of switches and a control unit configured to perform the following steps: operating error detection means during operation of the device in a first mode; operating the device in a second mode in response to an erroneous power state being detected by the error detection means during operation of the device in the first mode; operating the error detection means during operation of the device in the second mode in order to determine an error location associated with the erroneous power state detected by the error detection means during operation of the device in the first mode.

An electronic device for series connection on a power supply line includes a plurality of switches and a control unit configured to perform the following steps: operating error detection means during operation of the device in a first mode; operating the device in a second mode in response to an erroneous power state being detected by the error detection means during operation of the device in the first mode; operating the error detection means during operation of the device in the second mode in order to determine an error location associated with the erroneous power state detected by the error detection means during operation of the device in the first mode.

Electrical power system includes: one or more rotary electric machines, each mechanically coupled to a gas turbine engine spool; a set of converter circuits connected to the one or more rotary electric machines for conversion between alternating (ac) and direct current (dc), wherein one or more rotary electric machines and the set of converter circuits are arranged to output a number R≥2 of dc power channels, each dc power channel having a respective index r=(1, . . . , R); and a group of N dc load channels connected to the R dc power channels by a switching arrangement, wherein N>R and each dc load channel has a respective index n=(1, . . . , N). The switching arrangement is operable to connect a number Q≥1 of the N load channels to at least two different power channels of the R power channels.

Electrical power systems for distributing electrical power in aircraft are described. One such electrical power system comprises: an electrical power source configured to output a number R≥2 of dc power channels, each dc power channel having a respective index r=(1, . . . , R); and a group of N dc load channels connected to the R dc power channels by a switching arrangement, wherein N>R and each dc load channel has a respective index n=(1, . . . , N). The system further comprises, for each respective one of a plurality of the N load channels, a current limiting device (CLD) operable to limit an amount of current flowing from the power channels to a load connectable to the electrical power system via the respective load channel. The electrical power source may comprise one or more batteries.