A multichannel frequency response analyser for impedance spectroscopy on power sources

application of upfc based on svpwm for power quality improvement

در سالهای اخیر،اختلالات کیفیت توان مهمترین موضوع می باشد که محققان زیادی را برای پیدا کردن راه حلی برای حل آن علاقه مند ساخته است.امروزه کیفیت توان در سیستم قدرت برای مراکز صنعتی،تجاری وکاربردهای بیمارستانی مسئله مهمی می باشد.مشکل ولتاژمثل شرایط افت ولتاژواضافه جریان ناشی از اتصال کوتاه مدار یا وقوع خطا در سیستم بیشتر مورد توجه می باشد. برای مطالعه افت ولتاژ واضافه جریان،محققان زیادی کار کرده ...

A New High Frequency Grid Impedance Estimation Technique for the Frequency Range of 2 to150 kHz

Grid impedance estimation is used in many power system applications such as grid connected renewable energy systems and power quality analysis of smart grids. The grid impedance estimation techniques based on signal injection uses Ohm’s law for the estimation. In these methods, one or several signal(s) is (are) injected to Point of Common Coupling (PCC). Then the current through and voltage of ...

An evaluation of the Chemispek multichannel analyser

reporting errors. An increased computer facility would be particularly useful for laboratories which do not have a .sophisticated data-processing system. In its present form, the output of the calculator can be fed directly into data processing systems in current use in clinical biochemistry. Conclusions The Vitatron PA800 is a reliable instrument which produces accurate results on small volume...

Conversion of a multichannel analyser into an analogue signal averager.

An analogue to digital (AD) converter is described which may be used to transform a multichannel analyser into an analogue signal averager suitable for analysis of analogue signals in the frequency range from DC to typically 40 kHz and signal amplitudes in the millivolt to volt range. The AD converter operates on a triggered basis and is capable of sampling an analogue signal at a maximum rate ...

MULTICHANNEL INTRALUMINAL IMPEDANCE AND pH.