Grid-forming inverters (GFMs) have emerged as crucial components in modern power systems, facilitating the integration of renewable energy sources and enhancing grid stability. The significance GFMs lies their ability to autonomously establish voltage frequency, enabling grids form improve system flexibility. Discussing control methods for grid-forming is paramount due role shaping dynamics ensuring reliable delivery. This paper explores fundamental advanced employed by GFMs, explaining...

Pulse width modulation (PWM) control for power converters have been vastly investigated and used in many industrial application. For medium voltage high applications, low switching frequency PWM techniques are preferred over frequency-based techniques. The preprogrammed technique known as selective harmonics elimination (SHE) gives the better quality waveform at a lower frequency. main difficulty applying SHE is solving of non-linear transcendental equations obtaining angles. Several methods...

This paper presents the field-oriented control (FOC) of a five-phase induction motor (FPIM) fed from three-to-five phase direct matrix converter (DMC). The article focuses on modulation and DMC, which discusses minimizing problems associated with switching vector selection, sector identification, sequence dwell-time calculations. DMC is controlled space pulse width (SVPWM) technique, eliminating x-y components vectors. Moreover, can perform unity power factor at input side. FPIM sourced FOC...

Ovarian steroid cell tumours (not otherwise specified) are rare neoplasms of the ovary and classified under lipid tumours. Their diagnosis can be considered as one exclusion. Histopathologically, tumour should carefully evaluated for microscopic features malignancy, but it is essential clinician pathologist to remember that in these tumours, pathologically benign histomorphology does not exclude possibility clinically malignant behaviour. Our case study focuses on comparative findings a...

Solid-state transformers (SSTs) have emerged as a superior alternative to conventional and are regarded the building block of future smart grid. They incorporate power electronics circuitry high-frequency operation, which allows high controllability enables bi-directional flow, overcoming limitations transformers. This paper presents detailed analysis solid-state transformer, expounding fundamentals, converter topologies, applications, challenges SST in systematic manner. The discusses...

To determine the role of intraoperative cytology (IOC) in diagnostic evaluation ovarian neoplasms.The present study was conducted Department Pathology, Jawaharlal Nehru Medical College, AMU, Aligarh, India, over a time span 18 months. Depending on consistency lesion, touch, scrape or crush techniques were used to prepare cytological smears. Smears fixed 95% ethyl alcohol and then stained with hematoxylin eosin Papanicolaou stains. Cytological results compared histological diagnosis taking...

In this study, common mode voltage (CMV) reduction using space vector pulse‐width modulation (SVPWM) technique is proposed for a three‐phase induction motor drive fed by three‐to‐three phase indirect matrix converter (MC). The SVPWM effectively reduces the peak of CMV without affecting output gain. By adopting there no change in d v /d t at terminal machine when compared to existing method. control possible proper placement zero vectors rectifier stage and discarding inverter MC. implemented...

In this article, a novel ZAC-source single-phase ac-ac converter with high buck and boost voltage conversion capability is introduced. The proposed topology utilizes the network to regulate frequency magnitude of output voltage. operates in mode when duty cycle lies between 0 0.33, 0.33 1. switching control strategy discussed provides feature independently. Employment capacitors outer closed loop results highly consistent operation characterized by inherent soft commutation capability,...

Solar energy is widely used among the various renewable sources since it conveniently accessible. Various Non-Isolated DC-DC converter configurations, such as Boost, Buck-Boost, and CUK, associated with Maximum Power Point Tracking (MPPT) controller i.e., Perturb-observation (P&O) Incremental Conductance (INC) to bring out MPP from Photovoltaic (PV) System, discussed in this article. Controlling switching operations of converters by providing appropriate pulse through MPPT allows desired...

This paper addresses multiphase matrix converter (MPMCs) modulated with Venturini's classical scalar approach. The solution to obtain time-varying modulation functions was limited configuration, which later extended configuration. equations had four constants that were common all functions; out of two defined arbitrarily and other found analytically by reducing the equation a two-variable optimisation problem. However, in this work, an attempt is made provide flexibility finding solutions...

In spite of becoming an integral part surgical pathology, very few reports are available regarding the utility intraoperative cytology (IOC) exclusively for bone lesions. This study was undertaken in a view to fill this lacuna. Sixty lesions were evaluated intraoperatively with help smears prepared by touch, scrape, or crush technique. The diagnosis made on cytological preparation compared histopathological taking latter as gold standard. Different parameters like reasons Intraoperative...

Our objective was the determination of understory grass greening stage (GGS: defined as date when 75% in surrounding area a particular location would be green) using remote sensing data over boreal-dominant forested regions Canadian province Alberta. We used moderate resolution imaging spectroradiometer (MODIS)-derived accumulated growing degree days (AGDD) and normalized difference water index (NDWI) with ground-based GGS observations at approximately 120 lookout tower sites during period...

The transport sector lies amidst major challenges like air pollution because of the emission greenhouse gases (GHGs) and dependency on nonrenewable sources fossil fuels. To alleviate those problems in sector, Electric vehicle (EV) has potential to be silver lining. EV is based electric propulsion that requires battery power engine does not emit GHGs. Albeit advantages, running without its drawbacks. Electricity needed run EV, there are many places where either a charging station present or...

Solar energy is an abundant source of renewable/sustainable energy, which has enormous potential in reducing the foot print greenhouse gases. In this paper, we presented a modelling framework estimating solar over portion residential community Sandstone northwest Calgary, Canada. We calculated actual daily incident radiation as function latitude, day year, and possible light hours; also employed high-resolution remote sensing images to calculate effective roof area for installing...

<p class="abstract">The paper elaborate finite set model based predictive current control of a seven-phase voltage source inverter. The is carried out considering actions. space vector inverter (VSI) yields 2<sup>7</sup> = 128 vectors, with 126 active and two zero vectors. method described in this discard some switching states from the whole employs reduced number to track commanded current. Three sets vectors are used for actuation, one case only 15 (14 zero), second 29...

Leiomyoma is a benign tumor of smooth muscles. originating from the scrotum rare entity. We report here case 50-year-old male who presented with 4-cm lump in left side scrotum. Clinically, it was provisionally diagnosed as sebaceous cyst and excised. The histopathology showed findings consistent leiomyoma. There no cytological atypia or mitosis. final diagnosis solitary leiomyoma given. patient followed up regularly doing fine for last 4 months.

The feasibility of power transfer enhancement, through simultaneous AC–DC transmission in a two-terminal network, has been proposed earlier by the authors, and concept is well established. To meet increase demand for electricity, new technique this article to use existing lines addition independent control AC DC flow. This paper extends three-terminal network considering tapping from middle line. also superimposed already system. In topology, multi-terminal system used, which integrated with...

This paper presents a novel, scalable, and modular multiport power electronic topology for the integration of multiple resources. converter is not only scalable in terms renewable energy resources (RES) storage devices (SDs) but also output ports. Multiple dc outputs are designed to serve as input stacking modules (SMs) multilevel (MMC). The proposed bidirectional nature superior functionality way that universal responsible RES/SDs regulates ports SMs MMC. All can be easily integrated (and...

This study was conducted to evaluate the role of sediment cytology biopsy specimen fixatives, which is usually discarded, in early diagnosis bone lesions. Cytological smears prepared from sediments fixatives (sediment cytology) were used 65 specimens biopsied with suspicion malignancy. The cytological then compared histological diagnosis, taking latter as gold standard. Smears adequately cellular and showed good preservation morphology. Some microfragments tissue. Cytology labeled 29 lesions...

Impedance Source Inverters are extremely popular these days. They offer simultaneous boosting of input voltage applied as well inversion operation. The converter achieves this by means a specially designed impedance network along with H - Bridge. Unlike conventional Bridge (HB) inverters, source inverters can boost the supply thereby achieving Utilizing feature, transient due to grid side disturbance, improved control and enhanced fault tolerance capability be achieved. There two types...

This paper puts forward a seven-level switched-capacitor multilevel inverter (7L-SCMLI) with boosting features. The main features of the proposed structure are use reduced number switches, lesser value total standing voltage (TSV). Results obtained by simulation and experimental setup displayed in to validate claim. Power loss analysis is done estimate efficiency. information regarding harmonic efficiency comparison conveyed through various plots. shows THD 12.19% waveform. From plot...