Adaptive shoot-through duty ratio control methodology of stand-alone quasi Z-source inverter

This paper presents an adaptive shoot-through duty ratio control methodology for a stand-alone three-phase quasi-Z-source inverter (qZSI). In practice, variable active and reactive load powers must be met by a qZSI-based stand-alone system. In this context, existing shoot-through control schemes for qZSI adjust the capacitor voltage or DC-link voltage at a fixed reference value. This causes extra voltage stresses on switches, high distortions, and an operating range reduction of the power inverter under variable load demands. On the contrary, the proposed shoot-through control scheme adjusts the shoot-through duty ratio adaptively based on load voltage feedback to improve performances. In this logic, the controllable shoot-through duty ratio facilitates various improved features in comparison to conventional schemes under load power variations. These features include reduced voltage stress across the switches, reduced distortions, and an extended operating range. The suggested proportional-integral (PI)-based scheme has a single control loop with a single measured quantity, i.e., sensing of load voltage only. The proposed concept has been verified via both simulation and experimental studies

Smart Grid Modernization: Opportunities and Challenges

Recently, there have been significant technological approaches for the bulk power grid. The customer demand is associated with conventional grid coupled large central generating stations through a high voltage transmission to a distribution system. Urban transmission systems are consistently progressing to meet the increasing needs for power and to replace old-pattern generation with native renewable generation and power provisions from outward green energy resources. Power grid is undergoing remarkable modernization towards advanced consistency, greater efficiency, and less cost by the incorporation of renewable energy and developed control technology. Quick developing nature of grid, consumer needs, and industrial invention situates substation modernization at the leading of grid transformation. Smart grid is essential to accomplish all the fastest technological reformations occurring in generation, transmission and distribution (T&D) of electric power, with growing application of sensors, computers and communications. In this study the recent trend and application of electric power grid is briefly enunciated

An Approach to Voltage Quality Enhancement by Introduction of CWVM for Distribution System

This paper presented with problems related with voltage flicker in power system networks. Several international standard issued to control the voltage flicker are briefly described and some important methods to analyse electrical circuits with sinusoidal and non-sinusoidal waveforms are introduced and evaluated. One of these methods – Cockcroft Walton Voltage Multiplier (CWVM) has been used to increase the voltage of a filter, which is also described in this paper as a practical application. The filter can compensate for harmonic currents, power factor, and unbalance voltage. The simulation results using Multisim are presented, showing that good dynamic and steady-state response can be achieved with this approach

sj-pdf-1-tam-10.1177_17588359241236442 – Supplemental material for Treatment with nanosomal paclitaxel lipid suspension versus conventional paclitaxel in metastatic breast cancer patients – a multicenter, randomized, comparative, phase II/III clinical study

Supplemental material, sj-pdf-1-tam-10.1177_17588359241236442 for Treatment with nanosomal paclitaxel lipid suspension versus conventional paclitaxel in metastatic breast cancer patients – a multicenter, randomized, comparative, phase II/III clinical study by Chiradoni Thungappa Satheesh, Rakesh Taran, Jitendra Kumar Singh, Shanti Prakash Shrivastav, Nikunj K. Vithalani, Kalyan Kusum Mukherjee, Rajnish Vasant Nagarkar, Tanveer Maksud, Ajay Omprakash Mehta, Krishnan Srinivasan, Mummaneni Vikranth, Satish Ramkrishna Sonawane, Ateeq Ahmad, Saifuddin Sheikh, Shoukath M. Ali, Ronak Patel, Mahesh Paithankar, Lav Patel, Anil Rajani, Deepak Bunger, Alok Chaturvedi and Imran Ahmad in Therapeutic Advances in Medical Oncology</p