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62 results for “Oscillation”
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Research ArticleOpen accessIn the abstractMOTIONS STUDY OF A SINGLE CYLINDER HIGH SPEED SPARK IGNITION LINIER ENGINE WITH SPRING SYSTEM AS RETURN CYCLEA. Z.M. Fathallah, Semin, I. M. Ariana, I. GeriantoA single cylinder two stroke spark ignition conventional engine have been modified to linier engine with spring mechanism. Before develop the design of linear engine is necessary to analysis of motion. Although principle of combustion process in combustion chamber is the same in fact the oscillation movement is different. Simulation technique has been adopted to study both linear and conventional … …American Journal of Applied Sciences, Vol. 11, Issue 3 · 17 Jan 2014 · 7,179 accessesView PDFCite
Research ArticleOpen accessIn the abstractTHE THEORETICAL SIMULATION OF AXIAL VIBRATIONS IN FINITE CYLINDRICAL PIEZOELECTRIC SHELL MADE OF THE TRIGONAL (3M) CRYSTALH. Zeynali, B. Jazi, R. KarimiThe axial vibration in a thin layer of finite cylinder made of trigonal (3M) piezoelectric crystal are investigated. By using a closed form solution of the equations of motion and applying new boundary conditions the effects of the geometrical dimensions, axial hydrostatic pressure and electrostatic potential along the axis of the cylinder shell on oscillation frequency and amplitude of spatial … …Physics International, Vol. 4, Issue 1 · 15 Feb 2013 · 6,918 accessesView PDFCite
Research ArticleOpen accessIn the abstractStatic Synchronous Series Compensator Controller based on Fuzzy Logic Control for Power System StabilizationPrechanon KumkratugProblem statement: Modern power system consists of the complicated network of transmission lines and carries heavy demand. Thus they cause in the stability problem. Approach: Static Synchronous Series Compensator (SSSC) is a power electronic based device that has the capability of controlling the power flow through a line. The series voltage injection model of SSSC is modeled into power flow … …American Journal of Applied Sciences, Vol. 8, Issue 10 · 7 Sep 2011 · 7,450 accessesView PDFCite
Research ArticleOpen accessIn the abstractEvaluation of Critical Clearing Time of Power System Equipped With a Series FACT DevicesPrechanon KumkratugProblem statement: The critical clearing time provides very important role of the robustness in power system. The Static Synchronous Series Compensator (SSSC) has been accepted to be equipped in series with modern power system. This study presents the method to evaluate the Critical Clearing Time (CCT) of the system equipped with a SSSC. Approach: The parameter on SSSC is modeled … …Journal of Computer Science, Vol. 7, Issue 6 · 14 Jun 2011 · 6,777 accessesView PDFCite
Research ArticleOpen accessIn the abstractFuzzy Logic Controller for Static Synchronous Series Compensator with Energy Storage System for Transient Stability AnalysisSona Padma, M. RajaramProblem statement: FACTS devices play a major role in the efficient operation of the complex power system. FACTS devices such as STATCOM, SSSC and IPFC are in increasing usage. With energy storage systems they have a good control over the real as well as reactive power compensation and transient stability improvement. The design of controller for the SSSC with SMES … …Journal of Computer Science, Vol. 7, Issue 6 · 14 Jun 2011 · 6,694 accessesView PDFCite
Research ArticleOpen accessIn the abstractCoordination of Series and Shunt Flexible AC Transmission System Devices Based Voltage Source Converter for Improving Power System StabilityPrechanon KumkratugProblem Statement: Static Synchronous Compensator (STATCOM) and Static Synchronous Series Compensator (SSSC) have been individually applied to improve stability of power system. Approach: This study presents the coordination of a STATCOM and SSSC for improving power system stability. The swing curves of the three phase faulted power system with various cases are tested and compared. Results: The swing curve of … …American Journal of Applied Sciences, Vol. 8, Issue 5 · 17 May 2011 · 7,065 accessesView PDFCite
Research ArticleOpen accessIn the abstractCoordination of Series and Shunt Flexible Alternating Current Transmission Line System Devices Based Thyristor Controller for Improving Power System StabilityPrechanon KumkratugProblem statement: Thyristor Controlled Series Capacitor (TCSC) and Static Var Compensator (SVC) have been individually applied to improve stability of power system. Approach: This study presents the coordination of a TCSC and SVC for improving power system stability. The swing curves of the three phase faulted power system with various cases are tested and compared. Results: The swing curve of … …American Journal of Applied Sciences, Vol. 8, Issue 4 · 18 Apr 2011 · 7,260 accessesView PDFCite
Research ArticleOpen accessIn the abstractEvaluation of Critical Clearing Time of Power System Equipped with a Static Synchronous CompensatorPrechanon KumkratugProblem statement: The critical clearing time provides very important role of the robustness in power system. The Static Synchronous Compensator (STATCOM) has been accepted to be equipped in modern power system. This study presents the method to evaluate the Critical Clearing Time (CCT) of the system equipped with a Static Synchronous Compensator (STATCOM). Approach: The parameter on STATCOM is modeled … …American Journal of Applied Sciences, Vol. 8, Issue 2 · 28 Feb 2011 · 7,148 accessesView PDFCite
Research ArticleOpen accessIn the abstractReduction of Over Line Current in Power System from Short Circuit Effect Using Static Synchronous Series CompensatorPrechanon KumkratugProblem statement: One of the major problems in power system is the over line current from short circuit effect. It may cause in the electrical apparatus outages. Approach: Static Synchronous Series Compensator (SSSC) is a power electronic based device that has the capability of controlling the line current. This study applies the SSSC to decrease the over line current in … …American Journal of Applied Sciences, Vol. 8, Issue 2 · 28 Feb 2011 · 7,304 accessesView PDFCite
Research ArticleOpen accessIn the abstractFull Model Wind Tunnel Study on the Xia-Zhang Bridge Under Operation StageAyad Thabit Saeed, Zhang Liang Liang, Yang Zhuan Yun et al.Problem statement: Long-span cable-stayed bridges under service and particular construction conditions are very susceptible to wind action due to their great flexibility, so the aerodynamic stability is becoming a major concern in the design and construction phrases. Cable-stayed bridges may exhibit wind-induced vibration phenomena such as flutter, buffeting and vortex oscillation under wind excitation. The study concentrated on the issues … …American Journal of Engineering and Applied Sciences, Vol. 3, Issue 2 · 30 Jun 2010 · 8,191 accessesView PDFCite