Browsing by Author "Yadav, Sisir Kumar"

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Comparison of Power Losses for Different Control Strategies of UPQC
(IEEE, 2020) Mathur, Hitesh Datt; Yadav, Sisir Kumar; Patel, Ashish
Unified Power Quality Compensator (UPQC) is a combination of Dynamic voltage regulator (DVR) and Dynamic Static Compensator (DSTATCOM) for mitigation of most power quality issues. Since involving two APFs, various control strategies have been proposed to enhance their utilization. Most control strategies can be classified into three categories- UPQC-P, UPQC-Q, and UPQC-S. Existing literature provides enormous details on various merits and demerits of such methods, like reduction in converter VA ratings, voltage injection etc. Still, a detailed study on power losses of such control strategies needs attention. This paper presents a comparison of different control strategies of UPQC of three-phase system such as UPQC-P, UPQC-Q, UPQC-S in terms of their power consumption losses. Losses are estimated using computer simulations performed in MATLAB/Simulink under various operating conditions of UPQC.
Digital Twin of a Single-Phase Home Converter System Integrating Distributed Energy Resources
(IEEE, 2024-02) Patel, Ashish; Yadav, Sisir Kumar; Mathur, Hitesh Datt
A digital twin (DT) is a digital representation of a physical entity or process that closely emulates the behavior of its real counterpart and is strongly connected to the real entity through data exchange links. DT technology is widely applied to various areas like smart cities, industrial automation, equipment design, manufacturing, and the automotive industry. Such applications are intended for improved design, operation, control, and maintenance of the real entity whose digital twin is prepared. Power Electronics applications heavily rely on digital electronics to model, simulate, and control the power converters. Such applications can immensely benefit from DT technology, but such applications in power converters are nascent. This paper presents a digital twin of a single-phase home inverter connected to a battery, AC load, and the grid. The inverter supplies power to the connected load in two modes- battery mode and grid mode. The digital twin of the inverter, implemented in Opal-RT, emulates the actual behavior of the hardware counterpart in both modes.
A novel particle swarm optimization based plant-in-loop tuning method for PI controller of integrated power converters
(IEEE, 2025-04) Yadav, Sisir Kumar; Patel, Ashish; Mathur, Hitesh Datt
Integrated Power Converters such as Shunt Active Power Filters (APFs), when integrated with renewable sources like solar PV, offer a more capable and cost-effective solution for both their core function and for feeding the renewable power to the grid. Shunt APF is generally integrated with PV arrays on the common DC link to compensate for power quality issues and feed solar PV power simultaneously. However, the regulation of the DC link, which is the foundation of the operation of such converters, can be more challenging due to the inclusion of PV intermittency. So, the PI controller, mostly used for DC link regulation, should be tuned optimally considering the variable operating conditions. Most tuning methods, whether offline or online, rely on mathematical modeling of the converter and are affected by inherent inaccuracies. Therefore, this work proposes an in-plant PI tuning method for shunt APF, which doesn’t require mathematical modeling and can be implemented in realtime within the actual plant and operating conditions therein. The method tunes the PI controller without having to relax the limits on its output, which are required for the safety of the hardware. The proposed method has been validated using realtime simulation and hardware setup of the PV-integrated shunt APF, and, in both cases, the method shows superior performance in regulating the DC link voltage of the integrated converter system under various operating conditions.
Optimum design method and performance analysis of unified power quality conditioner with distributed generation
(BITS PILANI, Pilani campus, 2024) Yadav, Sisir Kumar
Particle Swarm Optimization based Tuning Method of PI Regulator for PV fed Shunt Active Power Filter
(IEEE, 2022) Mathur, Hitesh Datt; Yadav, Sisir Kumar; Patel, Ashish
PSO-Based Online PI Tuning of UPQC-DG in Real-Time
(IEEE, 2024-08) Patel, Ashish; Mathur, Hitesh Datt; Yadav, Sisir Kumar
Power quality is critical in ensuring the efficient operation of electrical systems, and Unified Power Quality Conditioners with Distributed Generation (UPQC-DG) systems play a vital role in mitigating power quality issues such as voltage sags, swells, harmonics, and flicker. Proportional-integral (PI) control UPQC-DG systems are crucial for maintaining power quality by stabilizing the DC link voltage, which is also essential for the seamless integration of distributed generation into the power grid. Effective PI control ensures minimal voltage fluctuations and rapid response to disturbances, thereby enhancing overall system reliability and efficiency. However, traditional PI tuning methods, like the Ziegler-Nichols (ZN) approach, often fail to provide optimal performance under dynamic conditions in such complex converters. To address these limitations, this paper presents an innovative approach for real-time tuning of PI controllers in UPQC-DG systems using Particle Swarm Optimization (PSO). The primary objective is to dynamically optimize the PI controller parameters to enhance the stability and performance of the DC link voltage under varying operational conditions. The proposed method was validated in a real-time simulation environment using the OPAL-RT 4512 platform. The results demonstrate the PSO-based method's superior ability to reduce steady-state errors and enhance dynamic response as well. This study underscores the potential of PSO for real-time adaptive control, providing a robust solution for maintaining high power quality in UPQC-DG systems and improving the stability and reliability of distributed generation systems.
A Single-Phase Grid-Tied Converter System Integrating Solar PV, Battery and Compensating Power Quality
(IEEE, 2023) Patel, Ashish; Yadav, Sisir Kumar; Mathur, Hitesh Datt
Single-phase inverters integrating battery storage and renewable energy sources are becoming popular among resi-dential electricity consumers because of the need for reliable and quality power, pollution reduction, and savings in electricity costs. Gird-connected inverters have a multi-mode operation and are preferable over isolated ones, but their high complexity and cost are a concern. Battery integration with such inverters requires a high-voltage battery bank, which increases the cost further. Also, most single-phase grid-tied inverters don't support power quality compensation. This paper proposes an integrated power converter system forming a single-phase home grid, addressing the above-mentioned issues. The proposed approach integrates a low-voltage battery (48V) at the DC link of the grid-tied inverter using a high-gain bidirectional converter. It also enhances the capability of the single-phase grid-tied inverter to compensate for the power quality issues such as reactive power and non-linear current of the load. The proposed system is validated using MATLAB/Simulink simulation.
Study on Comparison of Power Losses Between UPQC and UPQC-DG
(IEEE, 2022) Mathur, Hitesh Datt; Yadav, Sisir Kumar; Patel, Ashish
In the era of modern power distribution network, the motivation to use green and clean energy resources for fulfilling the need of energy demand is gaining abruptly. This has enhanced the use of power electronics-based conversion devices leading to deterioration of power quality in the power distribution network. Several compensating custom devices, such as static compensators (STATCOMs), dynamic voltage restorers (DVRs), and unified power quality conditioner (UPQC), etc., have been developed in recent decades. UPQC consists of shunt active power filter (APF) and series APF connected in back-to-back fashion with a shared DC-link. In the case of UPQC-DG, a distributed generator (DG) is also connected at the DC-link. In the existing literature available, UPQC integrated with DG is found to be a promising topology which can simultaneously compensate for power quality issues and integrate DG into the grid. Its functionality and performances have been presented by many researchers, but a detailed investigation on its power losses is missing. This article presents a detailed comparison of conventional UPQC, UPQC-DG, and UPQC-independent DG (UPQC-IDG) in terms of their respective power losses and further enhances the criteria for selecting the best possible configuration to be used practically based on requirements and economical viability. In this executed work, the power losses are compared among UPQC, UPQC-DG, and UPQC-IDG for different steady-state and dynamic operating conditions. The power losses in all configurations are inclusive of conduction losses, filtering losses, and switching losses, found using simulation and empirical studies. The comparative study is based on computer simulations performed in MATLAB/Simulink and real-time simulation using Opal-RT.
Utilizing UPQC-DG to export reactive power to grid with power angle control method
(Elsevier, 2022-08) Mathur, Hitesh Datt; Patel, Ashish; Yadav, Sisir Kumar
Unified Power Quality Conditioner with Distributed Generation (UPQC-DG) is combined equipment that not only compensates power quality issues but also integrates distributed generation into the grid. This paper proposes to incorporate additional functionality in UPQC-DG to provide reactive power support to the grid. The proposed functionality enables the UPQC-DG to not only compensate for load reactive power but also to export it to the grid in a controllable and regulated manner. The control method of the proposed UPQC-DG system is based on a combination of Synchronous Reference Frame (SRF) theory and Unit Vector Template Generation (UVTG) and utilizes an additional PI controller to control the reactive power flow to the grid. Since the UPQC-DG in the proposed research handles an increased quantity of reactive power, the work incorporates the Power Angle Control (PAC) method to share reactive power burden between series and shunt Active Power Filters (APFs) of UPQC-DG for reducing the overall rating. The proposed UPQC-DG system is validated using exhaustive real-time simulations in Opal-RT for steady-state and dynamic performance.