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- W2385988915 abstract "Overvoltage is a critical factor which influences the security of the power system.It is necessary to research overvoltage so as to guarantee safe operation of power grid.The data acquisition is one of key techniques in the on-line monitoring system for overvoltage.A remarkable difference between external overvoltage and internal overvoltage in power system sets a higher demand for data acquisition.In order to solve the contradiction of sampling length and storage capacity,an implementation of data acquisition card with variable sampling speed for overvoltage is proposed.Hardware structure,the principle of data sampling and the software design of CPLD is introduced.The data acquisition card employs the complex programmable logic device(CPLD)as the main control chip.With unique pre-trigger acquisition function,the data acquisition card can restore the waveforms before the power grid fault happening.And with variable sampling speed technique,the data acquisition card can sample and record the full transient signals in power system with smaller memory capacity.The field operation experiences show that the data acquisition card features stable and reliable performance and can record the real overvoltage waveform of power system." @default.
- W2385988915 created "2016-06-24" @default.
- W2385988915 creator A5065865364 @default.
- W2385988915 date "2008-01-01" @default.
- W2385988915 modified "2023-09-26" @default.
- W2385988915 title "Data Acquisition Card with Variable Sampling Speed for Monitoring Overvoltage Based on CPLD" @default.
- W2385988915 hasPublicationYear "2008" @default.
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