This paper presents an ant colony approach optimization to shunt capacitor placement on distribution systems under capacitor switching constraints. The optimum capacitor allocation solution is found for the system of feeders fed through their transformer and not for any individual feeder. The main advantages due to capacitor installation, such as system capacity release and reduction of overall...

Between the metal–insulator–metal (MIM) capacitor and metal–oxide–metal (MOM) capacitor, the MIM capacitor has a better characteristic of stable capacitance. However, the MOM capacitors can be easily realized through the metal interconnections, which does not need additional fabrication masks into the process. Moreover, the capacitance density of the MOM capacitor can exceed the MIM capacitor w...

This paper investigates the fault detection of a micro parallel plate capacitor subjected to nonlinear electrostatic force. For this end Thau observer, which has good ability in fault detection of nonlinear system has been presented and governing nonlinear dynamic equation of the capacitor has been presented. Upper and lower threshold for fault detection have been obtained. The robustness of th...

<p>We consider possibility to increase field-effect transistor's density in a switched-capacitor step-down DC-DC converter. Based on this approach we analyzed manufacturing of the converter heterostructure with special structure. Some specific sections must be doped by ion implantation or diffusion. After procedure optimized annealing has been done. We also obtained conditions for decreas...

A structure for single-stage high-order bandpass sigma-delta modulators (BPSDMs) is presented. The proposed structure introduces an additional internal path in each resonator, thus, adding one degree of freedom in coefficient determination. Coefficient spread can therefore be reduced, resulting in significantly reduced capacitance area in switched-capacitor BPSDM circuits. High-order BPSDMs wit...

The proposed photovoltaic Micro Inverter is based on three port flyback with one port dedicated to power decoupling function so the decoupling capacitance is reduced and hence the long lifetime film capacitor is used. One of the two transformers and one capacitor is used for decoupling function. The decoupling capacitor functions as energy storage as well as snubber capacitor to recycle the tra...

The use of fuseless capacitor banks requires subtle changes in the protection approach from the more traditional fused banks. This paper covers the aspects of protecting fuseless capacitor banks of various voltage classes. Comparison of fused versus fuseless capacitor bank protection is discussed, along with examples and insights from Minnesota Power’s experiences with fuseless capacitor banks.

Multibit delta-sigma modulators are widely used in recent analog-to-digital converter (ADC) implementations [1, Chapter 8]. Due to their improved stability, they can achieve the same high signal-to-noise ratio (SNR) with lower order modulator and lower oversampling ratio (OSR), i.e. higher speed, than their singlebit counterparts. Also, the use of a multibit feedback relaxes slew-rate and settl...

the most important factor in donor-recipient matching for hematopoietic stem cell transplantation is their hla typing. for many patients, we can not find a full-matched donor. in high risk patients, one locus  mismatched related donors are suitable alternatives. (1, 2) since the matching of patients and their siblings usually is based on low resolution hla typing, the matching of one locus mism...

Shunt capacitor banks are used to improve the quality of the electrical supply and the efficient operation of the power system. Studies show that a flat voltage profile on the system can significantly reduce line losses. Shunt capacitor banks are relatively inexpensive and can be easily installed anywhere on the network. This paper reviews principles of shunt capacitor bank design for substatio...