Frequency-conversion harmonic measuring device of electrical power system
A technology for measuring devices and power systems, which is applied to measuring devices, measuring electrical variables, and spectrum analysis, etc., can solve the problems of low measurement accuracy, poor real-time performance, and high cost, and achieve the effects of wide measurement range, low cost, and convenient operation and maintenance.
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[0014] The present invention is further described below in conjunction with accompanying drawing:
[0015] See attached drawings 1 and 2, the connection of the harmonic measurement device is to use the DSP unit (1) and the power supply unit (3) to connect with the AC unit (2), the display unit (5), and the input and output unit (4) respectively . The internal connection of DSP unit is connected by DSP(6) and 16bit BUS(12), DSP(6) is connected with display unit(5) through HPI, DSP(6) is connected with PC(13) through RS485, DSP(6) It is connected with frequency measurement circuit (9) through external interrupt; 16bit BUS (12) is connected with FLASH (10), SDRAM (11) and AD (8); AD (8) is connected with second-order RC filter (7).
[0016] See attached drawings 1 and 2. In the power system, where protection and measurement and control are required, the three-phase voltage and current are connected to the AC unit (2), converted into voltage signals within the AD sampling range, ...
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