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327 results on '"Shukla, Anshuman"'

10. Linear Flight Control of Unmanned Aerial Vehicle

Author

Pandey, Alok Kumar, Shukla, Anshuman, Gupta, Ashutosh, Gangwar, Manjeet Singh, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Singh, Rajesh, editor, Choudhury, Sushabhan, editor, and Gehlot, Anita, editor

Published
2018
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14. Transformer-Less Hybrid Series Static Compensator and its DC Capacitor Voltage Balance Technique Using Zero-Sequence Voltage

Author

Rath, Ibhan Chand, Patro, Siba Kumar, and Shukla, Anshuman

Abstract

The hybrid series converter (HSC) has enhanced the operating modulation-index (MI) range compared to the parallel hybrid converter (PHC). However, the HSC is underutilized when employed for applications such as HVdc. The parallel chain links (PCLs) of the HSC generate rectified voltage of fixed amplitude, whereas the series chain links (SCLs) serve as voltage wave-shaping circuit. The maximum output voltage of the HSC is equal to the PCL rating. Moreover, HSC (and also PHC) demands three single-phase transformers for their operation and consists of series/director switches (DSs) that undergo high voltage and dv/dt stress. This article intends to extract all the advantages inherent with the HSC and utilize it to its maximum ability by restructuring and operating it as a transformer-less hybrid-series static compensator (THSSC). The SCLs of the THSSC act as a voltage-aiding circuit and reduce voltage stress across DSs. In addition, the THSSC has a lower energy storage requirement and requires fewer submodule capacitors and switching devices. During unbalanced grid conditions, capacitor voltages related to different phases of the THSSC tend to divert from reference. The required quantity of zero-sequence voltage (ZSV) is injected into the PCL and SCL of all three phases to govern capacitor voltages. The expression for reference ZSV is derived by using the feed-back and feed-forward methods. The converter's working principle and capacitor voltage control technique are authenticated using experimental results obtained under different grid voltage conditions.

Published
2024
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22. A Novel Hybrid Multilevel DC–DC Converter Employing Trapezoidal Modulation

Author

Ansari, Mohd Shadab, Shukla, Anshuman, and Bahirat, Himanshu J.

Abstract

This article presents a new hybrid multilevel converter for medium voltage dc–dc interconnection. The structure of the topology is a hybrid of two-level converter and the modular multilevel converter (MMC). The proposed converter provides three-phase trapezoidal output voltages with a controlled slope while using only a single MMC leg. Therefore, using fewer submodules and sensors, and with its feature of low energy storage requirement (ESR), the overall size of the converter reduces. The front-to-front configuration of the proposed converter provides the desired voltage matching, grounding flexibility, and dc fault blocking capability. Moreover, the phase leg switches and the bidirectional switches of the converter are operated in the soft switching mode reducing the converter losses. A detailed mathematical analysis is presented to substantiate the low ESR and losses of the proposed converter. The performance evaluation of the proposed dc–dc converter is carried out in PSCAD/EMTDC and analyzed in detail. The operation of the converter is also verified on a developed scaled-down laboratory prototype.

Published
2023
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