Disclosed is a reactance-injecting module and its method of use to balance the currents among the phases of polyphase electric power transmission lines or to manage power flow among alternate paths, where the reactance-injecting module has high-speed, dedicated communication links to enable the immediate removal or reduction of injected reactance from all phases of a phase balancing cluster when a fault is detected on any one of the multiple phases. The reactance-injecting module may communicate information on a detected fault to the other reactance-injecting modules of the phase balancing cluster within 10 microseconds after the fault is detected to allow the phase balancing cluster to eliminate injected reactance from all phases within a time that is short compared to a cycle of the alternating current, such as 1 millisecond after the fault is detected. This provides extremely fast neutralization of injected reactance to minimize interference with fault localization analyses.

[Object] On the basis of a limit of an operation of a control unit that is connected to a power-receiving path of a converting unit, is electrically parallel with the converting unit, and controls apparent power in the power-receiving path of the converting unit, the operation of the control unit is controlled.

[Solution] A power control system includes: an acquisition section that acquires control unit information related to a limit of an operation by a control unit provided for a heat pump system that regulates temperature and/or humidity; and a control section that controls an operation of the control unit on the basis of the control unit information. The control unit is connected to a power-receiving path of a converting unit that converts received power and supplies the converted power to a load used for the regulating. The control unit is electrically parallel with the converting unit. The control unit controls apparent power in the power-receiving path.

[Object] On the basis of a limit of an operation of a control unit that is connected to a power-receiving path of a converting unit, is electrically parallel with the converting unit, and controls apparent power in the power-receiving path of the converting unit, the operation of the control unit is controlled.

[Solution] A power control system includes: an acquisition section that acquires control unit information related to a limit of an operation by a control unit provided for a heat pump system that regulates temperature and/or humidity; and a control section that controls an operation of the control unit on the basis of the control unit information. The control unit is connected to a power-receiving path of a converting unit that converts received power and supplies the converted power to a load used for the regulating. The control unit is electrically parallel with the converting unit. The control unit controls apparent power in the power-receiving path.

A distribution system may include at least one Power Management System (PMS) that controls electrical power distributed transmitted by the distribution system. The system may include a first power station located at an onshore platform. The first power station may include an onshore terminal that distributes electric power to the first power station and to at least one onshore load. The first power station may include various onshore reactors that monitor inbound reactive power received from the onshore terminal or that monitor outbound reactive power sent to a remote location. The system may include a second power station located at an offshore platform which is located at the remote location. The second power station may include an offshore terminal that receives electric power from the first power station and that delivers electric power to at least one offshore load.

A distribution system may include at least one Power Management System (PMS) that controls electrical power distributed transmitted by the distribution system. The system may include a first power station located at an onshore platform. The first power station may include an onshore terminal that distributes electric power to the first power station and to at least one onshore load. The first power station may include various onshore reactors that monitor inbound reactive power received from the onshore terminal or that monitor outbound reactive power sent to a remote location. The system may include a second power station located at an offshore platform which is located at the remote location. The second power station may include an offshore terminal that receives electric power from the first power station and that delivers electric power to at least one offshore load.

A method and apparatus are disclosed for indicating one or more characteristics associated with a power factor for a power line. The apparatus includes at least one feedback element for coupling to a power line that delivers electrical power from an Alternating Current (AC) source to a load and for providing a first feedback voltage that represents a voltage provided by the power line; at least one further feedback element for coupling to the power line for providing a further feedback voltage that represents a current provided by the power line; and at least one impedance element, having an electrical impedance, wherein a first potential difference across the impedance element that is responsive to a potential difference between the first feedback voltage and the further feedback voltage, indicates a characteristic associated with a power factor for the power line.

A method and apparatus are disclosed for indicating one or more characteristics associated with a power factor for a power line. The apparatus includes at least one feedback element for coupling to a power line that delivers electrical power from an Alternating Current (AC) source to a load and for providing a first feedback voltage that represents a voltage provided by the power line; at least one further feedback element for coupling to the power line for providing a further feedback voltage that represents a current provided by the power line; and at least one impedance element, having an electrical impedance, wherein a first potential difference across the impedance element that is responsive to a potential difference between the first feedback voltage and the further feedback voltage, indicates a characteristic associated with a power factor for the power line.

An arrangement for reactive power compensation at an electric energy transmission line includes at least one first reactive power compensation device including a first type of power electronic switches, at least one second reactive power compensation device including a second type of power electronic switches and a transformer having a first secondary coil connected to the first device, a second secondary coil connected to the second device and a primary coil connectable to the electric energy transmission line. The primary coil has more windings than any of the first and second secondary coils.

An arrangement for reactive power compensation at an electric energy transmission line includes at least one first reactive power compensation device including a first type of power electronic switches, at least one second reactive power compensation device including a second type of power electronic switches and a transformer having a first secondary coil connected to the first device, a second secondary coil connected to the second device and a primary coil connectable to the electric energy transmission line. The primary coil has more windings than any of the first and second secondary coils.

A capacitive power transmission cable (1) having at least two sets of conductive strands (2) and the strands of the sets are distributed in a transverse cross-section of the cable, whereby the two sets are in capacitive relation to each other, wherein preferably, the capacitance is at least 10 nF/m.