Filters








375 Hits in 3.5 sec

Damping and incremental energy in thyristor switching circuits

R. Rajaraman, I. Dobson
Proceedings of ISCAS'95 - International Symposium on Circuits and Systems  
We have derived simple formulas for the leading order changes in incremental energy at switchings and also derived the same formulas from the system linearized about the nominal steady state.  ...  We give a few examples which suggest that the small signal dynamic behavior of circuits with thyristor controlled reactors is not captured by modeling the thyristor controlled reactor as an impedance.  ...  Thus the thyristor switch offs damp the perturbation and the circuit is stable.  ... 
doi:10.1109/iscas.1995.521508 dblp:conf/iscas/RajaramanD95 fatcat:6pb7sidu2zbwlp2ydfxwe2xjby

Damping and Resonance in a High Power Switching Circuit [chapter]

Ian Dobson, Sasan Jalali, Rajesh Rajaraman
1995 IMA Volumes in Mathematics and its Applications  
This paper shows how to understand and predict damping and resonance in a basic thyristor controlled reactor circuit used for static VAR control.  ...  Switching circuits with thyristor controlled reactors are used in high power systems for static VAR control and flexible AC transmission.  ...  Acknowledgment The authors gratefully acknowledge funding in part from EPRI under contract numbers RP 4000-29 and RP 8010-30 and from NSF PYI grant ECS-9157192.  ... 
doi:10.1007/978-1-4757-2433-2_6 fatcat:vkr74flmyrdqjoozjyt3yeq4nq

Stability of ideal thyristor and diode switching circuits

I. Dobson
1995 IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications  
Periodic orbits of ideal diode circuits are proved to be stable using Jacobian and incremental energy methods. A source of damping in switching circuits is identified.  ...  Applications include high power thyristor controlled reactor and bridge rectifier circuits.  ...  Diodes are seen to damp incremental energy and contribute to circuit stability.  ... 
doi:10.1109/81.414825 fatcat:y2ldq3kiyzdhtafivg574iiu2a

Control Mechanisms of Energy Storage Devices [chapter]

Mahmoud Elsisi
2019 Energy Storage Devices [Working Title]  
The energy storage systems such as superconducting magnetic energy storage (SMES), capacitive energy storage (CES), and the battery of plug-in hybrid electric vehicle (PHEV) can storage the energy and  ...  contribute the active power and reactive power with the power system to extinguish the rapid change in load demands and the renewable energy sources (RES).  ...  The controlling in the thyristor firing angle is used to switch either rectifier or inverter modes, the converter output voltage is expressed in kV and it is given in following equation [19] : where E  ... 
doi:10.5772/intechopen.82327 fatcat:khmfy7mkirg5bguummgk7deeau

Application of SVC on stabilizing torsional oscillations and improving transient stability

A. F. Abdou, A. Abu-Siada, H. R. Pota
2012 2012 IEEE Power and Energy Society General Meeting  
Results show that the proposed controller is very effective in damping all SSR modes of the system under study.  ...  thyristors to control the reactive power exchange between the AC system and the SVC.  ...  shaft sections and the significant increment in the shaft speed.  ... 
doi:10.1109/pesgm.2012.6344674 fatcat:uxwos4l6ifaihp7c2ebhfp3bgy

Series Compensation of Transmission Systems: A Literature Survey

Camilo Andrés Ordóñez, Antonio Gómez-Expósito, José María Maza-Ortega
2021 Energies  
The review outlines the evolution of the series compensation technologies, from mechanically operated switches to line- and self-commutated power electronic devices, covering control issues, different  ...  applications, practical realizations, and case studies.  ...  Series Reactor TSSC Thyristor-Switched Series Capacitor TSSR Thyristor-Switched Series Reactor 22.  ... 
doi:10.3390/en14061717 fatcat:yj4lvsx3oreire7dgjhmts2efy

Power Flow Control in Transmission Line by Using UPFC

Manish Srivastava, Prakhar Singh, Sandeep Verma, Prince Singh
2021 International Journal of Research in Engineering, Science and Management  
The choice of input signals and the adopted control strategy for this system in order to dampen power oscillations in an efficient and robust manner are an important issue.  ...  In theory, the FACTS devices can provide rapid control of real and Var power through transmission line. The UPFC is a FACTS family member with very appealing characteristics.  ...  Switched Capacitor (TSC), Thyristor Switched Capacitor (TSC), Thyristor Switched (TSC).  ... 
doi:10.47607/ijresm.2021.670 fatcat:m4lezqcdl5hk3mxmsflb22sftq

Study and Analysis of Power System Stability Based on FACT Controller System

Yousif Al Mashhadany, Ahmed K. Abbas, Sameer Algburi
2022 Indonesian Journal of Electrical Engineering and Informatics (IJEEI)  
Energy framework soundness is identified with standards rotational movement and the swing condition administering electromechanical unique conduct.  ...  In the exceptional instance of two limited machines, the basis of equivalent territory security can be utilized to ascertain the basic clearing point in the force framework, It is important to look after  ...  (SVCs) using thyristor-switched capacitors (TSCs) as well as thyristor-controlled reactors (TCRs). The needed reactive power was built for providing or absorbing the energy [37, 38] .  ... 
doi:10.52549/ijeei.v10i2.3630 fatcat:vebmv7ug6nd3hcbxyd3isjicre

Hill Climbing Algorithm based Maximum Power Tracking of a PV Array

Pyatla Charan Teja
2021 International Journal for Research in Applied Science and Engineering Technology  
The main aim is to track the maximum power point of a solar module and there by using it effectively and efficiently  ...  In this paper we are going to see how the MPPT algorithm is used to obtain maximum power using a booster converter from a PV array. The booster converter steps up the voltage to required level.  ...  Prof. ch.v seshagiri rao , Department of Electrical Engineering, Sreenidhi Institute of science and Technology for his constant support, timely help, guidance, sincere co-operation during the entire period  ... 
doi:10.22214/ijraset.2021.34913 fatcat:hrjfcd3gfrfhvpinxv2mt4sfyy

MITIGATION OF TRANSIENT OVERVOLTAGES IN MICROGRID INCLUDING PV ARRAYS

Eman Awad, Ebrahim Badran
2020 IET Generation, Transmission & Distribution  
Therefore, a three-phase PV system model based on the equivalent Newton-Raphson circuit is used, and the efficiency of the PV system components is studied.  ...  Then, the use of the PV generation system model for switching studies is investigated using two different electrical systems.  ...  The de-energisation is performed by an unsymmetrical switching of phases A and B, together, of the switching circuit breaker.  ... 
doi:10.1049/iet-gtd.2019.1035 fatcat:jmvsaf4pkjcw5butu2p6bqg22m

Design, construction and test of a lightweight Thomson Coil actuator for medium voltage vacuum switch operation

Damian Sergio Vilchis-Rodriguez, Roger Shuttleworth, Sandy Smith, Mike Barnes
2019 IEEE transactions on energy conversion  
 Abstract -This paper details the design, construction and test of a lightweight, low energy usage Thomson Coil actuator for the operation of a commercial medium voltage vacuum switch.  ...  Experimental results show that 125J of electric energy are sufficient for operation of a commercial 27kV vacuum interrupter in times suitable for medium voltage DC protection applications.  ...  To operate the actuator, the thyristor switch (see Fig. 6 ) is closed to excite the top coil and initiate armature displacement.  ... 
doi:10.1109/tec.2019.2905745 fatcat:c3eahrkgf5eeroj5sbrfgvemoa

Power supply changes for NSTX Resistive Wall Mode Coils

S. Ramakrishnan, C. Neumeyer, R. Mozulay, E. Baker, R. Hatcher, J. Lawson, W. Que, X. Zhao
2013 2013 IEEE 25th Symposium on Fusion Engineering (SOFE)  
The existing thyristor rectifier is used as DC Link to both of the Switching Power Amplifiers.  ...  Prior to 2004, the NSTX power system was feeding twelve (12) circuits in the machine. In 2004 the Resistive Wall Mode (RWM) Coils were installed on the machine to correct error fields.  ...  If a fault is generated in the SPA, the IGBTs are switched off and the capacitor bank is discharged. The DC link power supply is 3-phase thyristor controlled unit and is rated at 1kV -4.5kA pulsed.  ... 
doi:10.1109/sofe.2013.6635283 fatcat:g5ms4fjnjzbtbeqbtl6viiaxjy

Design, Fabrication and Implementation of Microcontroller Controlled Static Var Compensator

G. Premkumar, B. Muthukumar
2013 International Journal of Computer Applications  
In circuits having reactive loads, containing capacitors or inductors, the energy is stored and hence resulting in a difference between voltage and current waveforms.  ...  time and hence, current in a shunt reactor is controlled by a thyristor-based ac switch with firing angle control.  ... 
doi:10.5120/14275-2433 fatcat:a3rseiljubgcbkbsoysi4gkpem

Damping of power swings by control of braking resistors

J. Machowski, A. Smolarczyk, J.W. Bialek
2001 International Journal of Electrical Power & Energy Systems  
In this paper an analysis of the stability enhancement and improved damping of power swings in a multi-machine power system by means of thyristor-controlled braking resistor installed in the network has  ...  It is optimal in the sense that it causes the quickest dissipation of the power system energy released by a disturbance.  ...  The recent progress in power electronics allows using the thyristor-switched (TSBR) and thyristor-controlled braking resistors (TCBR).  ... 
doi:10.1016/s0142-0615(00)00089-2 fatcat:b7kijuznwnh43mcr4g2vvykty4

Power Supply for NSTX Resistive Wall Mode Coils

S. Ramakrishnan, C. Neumeyer, R. Marsala, R. Hatcher, E. Baker
2005 21st IEEE/NPS Symposium on Fusion Engineering SOFE 05  
Since these coils need fast and accurate controls, a Switching Power Amplifier (SPA) has been procured, installed and commissioned along with other circuit components.  ...  Until 2004, the NSTX power system was feeding twelve (12) circuits in the machine.  ...  The RWM circuit was simulated in PPPL using the PSCAD program. All major circuit components are modeled and incorporated in the simulation circuit.  ... 
doi:10.1109/fusion.2005.252986 fatcat:2xt3mtzwrvg3ddoeir7k4vrttu
« Previous Showing results 1 — 15 out of 375 results