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P.K. Dhal

Bio: P.K. Dhal is an academic researcher from Sathyabama University. The author has contributed to research in topics: Inverter & AC power. The author has an hindex of 4, co-authored 6 publications receiving 24 citations.

Papers
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Proceedings ArticleDOI
08 Sep 2014
TL;DR: The fuzzy controller is used for static critical time and better damping oscillations system after short circuit fault presented and the performance is analyzed using digital simulation with single machine infinite bus (SMIB).
Abstract: The static synchronous compensator is used in power system network for improving voltage of a particular bus and compensates reactive power. It is connected to a bus near to source to improve the voltage profile and reactive power compensation. The STATCOM control scheme for grid connected system for power quality improvement is simulated using MATLAB/SIMULINK in power system block. The proposed scheme is applied for both linear and non linear load. The fuzzy controller is used static critical time and better damping oscillations system after short circuit fault presented. To achieve this idea a controller is designed based on energy function. Here a membership function identifies from the fuzzy system. Fuzzy controller is employed to the system to enhance transient stability. The performance is analyzed using digital simulation with single machine infinite bus (SMIB).

11 citations

Journal ArticleDOI
30 Mar 2012
TL;DR: A transient stability improvement using neural-fuzzy controller design for STATCOM with static synchronous time critical error and better damping system oscillations after a short circuit fault is presented.
Abstract: This paper presents a transient stability improvement using neural-fuzzy controller design for STATCOM with static synchronous time critical error and better damping system oscillations after a short circuit fault. This article on a STATCOM Control for transient stability improvement has proposed a system to meet with the addition of Lyapunov stability criterion to the ability and conditions as well. The performance is analyzed using digital simulation with (SMIB) with infinite bus.

7 citations

Journal ArticleDOI
TL;DR: In this paper, a gating pattern swapping technique for cascaded multilevel inverter, which is used for STATCOM, is presented, besides minimizing the harmonic level, the inverter unit fundamental output voltages are equalized.
Abstract: This paper presents a special gating pattern swapping technique for cascaded multilevel inverter, which is used for STATCOM. By using this technique besides minimizing the harmonic level, the inverter unit fundamental output voltages are equalized. Therefore, all the inverter units in each phase leg can equally share the exchanged active and reactive power with the utility grid. This greatly helps the dc-link voltages balancing control. PI Control is employed for improving performance. Fuzzy control is employed to the system for enhancing transient stability. The performance is analyzed using digital simulation.

5 citations

Proceedings ArticleDOI
01 Feb 2015
TL;DR: In this paper, the reactive power compensation with UPS has been implemented in an uninterruptible power supply system and the most effective power quality improvement solution is analyzed in an UE.
Abstract: This paper presents the reactive power compensation with UPS. The most effective power quality improvement solution is analyzed in an uninterruptible power supply systems. The conventional UPS has three stages i.e rectifier converts AC to DC, Battery to store DC and Inverter to convert DC to AC. A novel technique has implemented in off-line UPS. The power is delivered to load via by-pass switch when main supply is available. Inverter does not operate during this period. So inverter function is same as conventional inverter. To overcome this problem, static change over switches has proposed. Hence it will get better voltage regulation and loss less in distribution system. The performance of simulation result is analyzed using MATLAB/SIMULINK.

4 citations

Journal ArticleDOI
TL;DR: The overall concept of wireless power transmission and its strategy for finding an efficient means to distribute power without stringing wires that could wirelessly transport electricity are demonstrated in this paper.
Abstract: Abstract: The overall concept of wireless power transmission and its strategy for finding an efficient means to distribute power without stringing wires that could wirelessly transport electricity are demonstrated in this paper. This study examines the latest trends and technological advancements in the field of wireless power transfer. Wireless power transfer has become commonplace in future societies with advanced technology. Keywords: latest trends, technological advancements, wireless power transmission, stringing wires, ubiquitous

3 citations


Cited by
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Journal ArticleDOI
TL;DR: It has been abstracted that the STSMC based nonlinear STATCOM controller is competent to mitigate the dynamic instability of an electric power system even under contingency and different loading conditions.

16 citations

Proceedings ArticleDOI
21 Feb 2015
TL;DR: Results obtained indicate that the designed model has very good performance which is comparable to the already existing UPFC, and indicates that the power system stability enhancement by implementing the HPFC in MM System power system is encouraging.
Abstract: The stability of an interconnected power system is its ability to return to normal or stable operation after having been subjected to some form of disturbance. Instability means a condition denoting loss of synchronism or falling out of step. Stability considerations have been recognized as an essential part of power system planning for a long time. With interconnected system continually growing in size and extending over vast geographical regions, it is becoming increasingly more difficult to maintain synchronism between various parts of a power system. FACTS devices have shown very promising results when used to improve power system steady-state performance. They have been very promising Candidates for utilization in power system damping enhancement. Hybrid Power Flow Controller (HPFC) is incorporated with MM system in the present work as it can be used to replace or supplement the existing equipments. Usually, it can be installed at locations already having the reactive power compensation equipments like the SVC, STATCOM etc. In this Paper author Studied the power system stability enhancement by implementing the HPFC in MM System power system. The system also has the provision of a comparative study of the performances of UPFC and HPFC regarding power system stability enhancement of the system. Results obtained are encouraging and indicate that the designed model has very good performance which is comparable to the already existing UPFC.

13 citations

Proceedings ArticleDOI
08 Feb 2014
TL;DR: Design of HPFC model using MATLAB/Simulink software and study of the power system stability enhancement by implementing the HPFC in SMIB System power system indicate that the designed model has very good performance which is comparable to the already existing UPFC.
Abstract: A number of Flexible AC Transmission System (FACTS) controllers based on the rapid development of power electronics technology have been proposed in recent years for better utilization of existing transmission facilities. FACTS devices have shown very promising results when used to improve power system steady-state performance. They have been very promising candidates for utilization in power system damping enhancement. Hybrid Power Flow Controller (HPFC) is proposed in the present work as it can be used to replace or supplement the existing equipments. Usually, it can be installed at locations already having the reactive power compensation equipment's like the SVC, STATCOM etc. In this Paper author designed HPFC model using MATLAB/Simulink software and study of the power system stability enhancement by implementing the HPFC in SMIB System power system. The system also has the provision of a comparative study of the performances of UPFC and HPFC regarding power system stability enhancement of the system. Results obtained are encouraging and indicate that the designed model has very good performance which is comparable to the already existing UPFC.

13 citations

Journal ArticleDOI
TL;DR: A comprehensive analysis of CMC based STATCOM with fuzzy controller in real time power system concerning the problem of variable loading and losses and it is demonstrated that the described model works to an excellent level in improving the substation performance.
Abstract: Electric Power is a major concern that has generated more importance in electrical utilities and consumers. To assure a reliable and quality power system, all the bus are expected to maintain steady acceptable voltage before and after being subjected to any disturbance. Among the FACTs devices a static synchronous compensator(STATCOM) is analyzed to provide a reliable and feasible solution. The STATCOM has been developed using cascaded multilevel converter. A FUZZY based controller for Cascaded Multilevel STATCOM is developed which produces improved performance.This paper presents a comprehensive analysis of CMC based STATCOM with fuzzy controller in real time power system concerning the problem of variable loading and losses. A real time substation with 20 bus are analyzed with power flow analysis with and without STATCOM. Without the connection of STATCOM, a observable changes in the system voltage, line flows and losses are in system behaviour. But this influences the quality of grid and hence the customers are affected badly, indicating the need of power flow analysis and location of STATCOM on the system to improve the voltage profile. It is demonstrated that the described model works to an excellent level in improving the substation performance.

12 citations

Proceedings ArticleDOI
01 Nov 2018
TL;DR: Simulation results validate the design methodology and also indicates the DSBC-3L topology as a promising solution for medium voltage STATCOMs due to its costs, protection during short circuits and smaller insulation requirements.
Abstract: The modular multilevel converters (MMCs) have shown great emphasis in academic studies of the last decades, specially applied in renewable energy systems, HVDC systems, energy storage, electrical drives and STATCOMs. In STATCOM applications, in particular, the Double Star (DS) configuration has several operating advantages, mainly related to its ability to compensate negative sequence components and unbalanced currents. Considering the advantage of these topologies in STATCOM application, it is proposed in this work a comparison of two DS topologies: Double Star Chopper-Cell (DSCC) and Double Star Bridge-Cell (DSBC). These topologies are compared in terms of steady-state operation, power losses and costs. In addition, two variations of DSBC topology are approached: DSBC-2L, which employs 2-level modulation and DSBC-3L, which employs 3-level modulation. The three MMC topologies are designed based on a 15 MVA STATCOM connected in a 13.8 kV grid. The simulation results validate the design methodology and also indicates the DSBC-3L topology as a promising solution for medium voltage STATCOMs due to its costs, protection during short circuits and smaller insulation requirements.

10 citations