INSTRUMENT AND METHOD FOR MEASURING PARTIAL ELECTRICAL DISCHARGES IN AN ELECTRICAL SYSTEM
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Abstract
An instrument (1) and a method for measuring pulses of partial electrical discharges in an electrical system comprise data processing means (5) operatively associated both with an input stage (2), able to receive an analogue signal (3) representing said pulses and to provide a digital representation of the entire wave form of the pulses, to receive said digital representation, extract the value of predetermined parameters relating to the wave form of the pulses and transfer to and output stage (4) a processed digital signal comprising said values, the processing means (5) being able to operate substantially in real time, i.e. with no need for a memory for the intermediate storage of the data. Known solutions within the field of the measurement of partial discharge pulses for diagnostic purposes provide for the use of peak detector instruments, which are not able to measure all information useful for a diagnosis of the electrical system, and oscilloscopes interacting with a computer, disadvantageous in terms of costs and of calculation efficiency.
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Citations
39 Claims
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1-21. -21. (canceled)
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22. An instrument (1) for measuring partial electrical discharges in an electrical system, comprising:
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an input stage (2) set up to receive an analogue signal (3) representing one or more pulses of partial discharges to be measured and to generate at its output a digital representation of the entire wave form of said one or more pulses, an output stage (4) set up to transfer data in digital shape at the output from the instrument, data processing means (5) operatively associated both with the input stage (2) and with the output stage (4) to receive said digital representation of the entire wave form of said one or more pulses, extract the value of predetermined parameters relating to the wave form of said one or more pulses and transfer to the output stage (4) a processed digital signal comprising said values, the processing means (5) operating substantially in real time, i.e. with no need for a memory for the intermediate storage of the data, characterized in that said predetermined parameters comprise amplitude of the discharge pulses, phase parameters, equivalent duration (T) and equivalent bandwidth (W). - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 39)
characterised in that the instrument for measuring the partial electrical discharges is an instrument (1) as claimed in claim 22, or said instrument operates according to a method for measuring partial electrical discharges in an electrical system, characterised in that it comprises the following steps; receiving in an input stage (2) an analogue signal (3) representing one or more pulses of partial discharges to be measured and to generate at its output a digital representation of the entire wave form of said one or more pulses, processing in real time, i.e. with no need to store data in a memory, said digital representation of the entire wave form of said one or more pulses, to extract the value of pre-set parameters relating to the wave form of said one or more pulses, said parameters comprising amplitude of the discharge pulses, phase parameters, equivalent duration (T) and equivalent bandwidth (W).
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34. A method for measuring partial electrical discharges in an electrical system, characterised in that it comprises the following steps:
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receiving in an input stage (2) an analogue signal (3) representing one or more pulses of partial discharges to be measured and to generate at its output a digital representation of the entire wave form of said one or more pulses, processing in real time, i.e. with no need to store data in a memory, said digital representation of the entire wave form of said one or more pulses, to extract the value of pre-set parameters relating to the wave form of said one or more pulses, said parameters comprising amplitude of the discharge pulses, phase parameters, equivalent duration (T) and equivalent bandwidth (W). - View Dependent Claims (35, 36, 37, 38)
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Specification