Method and a device for communication in a high voltage converter station
First Claim
1. A method for communicating between low potential level and a valve located on high voltage potential level in a high voltage converter station, said valve comprising a plurality of valve units each having at least one semiconductor component of turn-on type and for each semiconductor component a first control unit located on high voltage potential and controlling said semiconductor component, said first control units being connected to a valve control unit located on low potential level through light conductors, whereby signals associated with a change in the conducting state of the respective semiconductor components are sent between said valve control unit and said respective first control unit, while separating them galvanically, said method comprising the step of:
- sending serial messages between said valve and the low potential level via said light conductor in periods of time during which the light conductor is free from said signals associated with a change in the conducting state of said semiconductor components.
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Abstract
An apparatus and method for communication between low potential level and a valve of a high voltage converter station located on high voltage potential level is provided. The apparatus comprises means adapted to send serial messages on light conductors between a valve control unit and a first control unit for controlling semiconductor components of the valve of turn-on type on high voltage potential level in periods of time when the respective light conductor is free from signals associated with a change in the conducting state of the semiconductor component, such as turn-on and/or indications signals.
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Citations
21 Claims
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1. A method for communicating between low potential level and a valve located on high voltage potential level in a high voltage converter station, said valve comprising a plurality of valve units each having at least one semiconductor component of turn-on type and for each semiconductor component a first control unit located on high voltage potential and controlling said semiconductor component, said first control units being connected to a valve control unit located on low potential level through light conductors, whereby signals associated with a change in the conducting state of the respective semiconductor components are sent between said valve control unit and said respective first control unit, while separating them galvanically, said method comprising the step of:
sending serial messages between said valve and the low potential level via said light conductor in periods of time during which the light conductor is free from said signals associated with a change in the conducting state of said semiconductor components. - View Dependent Claims (2, 3, 4, 5, 6, 7, 15, 16, 17)
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8. An apparatus for communicating between low potential level and a valve located on high voltage potential level in a high voltage converter station, said valve comprising a plurality of valve units each having at least one semiconductor component of turn-on type and, for each semiconductor component, a first control unit located on high voltage potential and controlling said semiconductor component, said first control units being connected to a valve control unit located on low potential level through light conductors, whereby signals associated with a change in the conducting state of the respective semiconductor components are sent between said valve control unit and said respective first control unit, while separating them galvanically, said apparatus comprising:
means for sending serial messages on said light conductors in periods of time during which said light conductors are free from said signals. - View Dependent Claims (9, 10, 11, 12, 13, 14, 18, 19, 20, 21)
Specification