Patent ID: 7756650

Claim:
An apparatus for acquiring and processing a multiplicity of measured values in an HVDC transmission installation, comprising: a plurality of measurement units for detecting measurement variables in the HVDC transmission installation and acquiring measured values; a plurality of preprocessing units connected in series with one another and each connected to at least one of said measurement units, said preprocessing units including a final preprocessing unit connected downstream of the remaining said preprocessing units and to an open-loop control, closed-loop control, and monitoring system; each said preprocessing unit being configured to receive the measured values, to preprocess the measured values, and to produce optical measured values, wherein any optical measured values produced by the respective said preprocessing unit and the optical measured values received from upstream preprocessing units are transmitted to a respective downstream preprocessing unit or to the open-loop control, closed-loop control and monitoring system, to provide all the measured values for the open-loop control, closed-loop control and monitoring system by said final preprocessing unit; each said preprocessing unit having a multiplicity of inputs for the measured values, configuration means for selection of a function as a master unit or a slave unit, preprocessing means for preprocessing the measured values, electro-optical transducers connected to said preprocessing means for converting preprocessed measured values to optical data, and transmitting and receiving means, said preprocessing means having input circuitry for detecting and converting analog measured values to digital values, a programmable gate array, and a digital signal processing unit.