VERIFYING SYSTEM AND METHOD FOR VERIFYING THE DISCONNECTING MEANS OF A DC/AC CONVERTER
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Abstract
Verifying system and method for verifying the disconnecting means of a DC/AC converter which are connected in series through a midpoint in each phase between the converter and a power grid. The system comprises voltage detectors and a control unit in communication with said detectors and configured for determining the status of the disconnecting means depending on said voltages. The detectors comprise a detector associated with each phase for measuring the voltages between the corresponding midpoint and the neutral of the power grid, and an additional detector for measuring the voltage between said neutral and a reference point of the converter.
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Citations
32 Claims
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1-14. -14. (canceled)
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15. A verifying system for verifying disconnection of a three-phase DC/AC converter by two disconnecting devices connected in series through a midpoint in each phase between the three-phase DC/AC converter and a power grid, the verifying system comprising:
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a plurality of voltage detectors, comprising, a voltage detector associated with each phase, respectively, configured to measure the phase voltages between each midpoint and the neutral of the power grid, an additional voltage detector configured to measure a reference voltage between the neutral of the power grid and a reference point of the DC side of the three-phase DC/AC converter, and a control unit which is in communication with said plurality of voltage detectors and configured to receive the measured voltages and determine the status of the disconnecting devices depending on said received voltages. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A verifying method for verifying disconnection of a three-phase DC/AC converter by two disconnecting devices connected in series through a midpoint in each phase between the three-phase DC/AC converter and a power grid, comprising:
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measuring the phase voltage between the midpoint of the three phases and the neutral of the power grid, measuring a reference voltage between the neutral of the power grid and a reference point of the three-phase DC/AC converter, and determining a status of the disconnecting devices taking into account the measured voltages. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32)
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Specification