Phase-orthogonal FIR filter based reactive power measurement for power meters
| Autor: | Punithavathi Duraiswamy, Shankar Kumar Selvaraja |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Physics
Finite impulse response 020208 electrical & electronic engineering 020206 networking & telecommunications 02 engineering and technology Filter (signal processing) AC power Chip Signal Surfaces Coatings and Films Power (physics) Computer Science::Hardware Architecture Hardware and Architecture Electricity meter Signal Processing 0202 electrical engineering electronic engineering information engineering Electronic engineering Hardware_ARITHMETICANDLOGICSTRUCTURES Voltage |
| Zdroj: | Analog Integrated Circuits and Signal Processing. 108:317-322 |
| ISSN: | 1573-1979 0925-1030 |
| DOI: | 10.1007/s10470-021-01833-y |
| Popis: | In filter based reactive power measurements, the voltage is phase shifted by $$90^\circ$$ relative to the current. This paper presents a technique of measuring reactive power based on differential $$90^\circ$$ shifter. According to this method, the sampled voltage and the current signal passes through a pair of FIR filters that shifts $$+\,45^\circ$$ and $$-\,45^\circ$$ . Then, the two outputs are multiplied to measure the reactive power. A pair of FIR filters that are having identical flat magnitude responses and orthogonal phase responses are designed. Multiplier-less FIR structure is adopted for hardware implementation to reduce the chip area cost making the technique implementable in digital power meter. A detailed hardware architecture and its implementation in FPGA is presented. Furthermore, the measurement of reactive power for various frequencies between 50 and 250 Hz is also presented. |
| Databáze: | OpenAIRE |
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