Volts Alternating Current

March 2007
Network Dictionary;2007, p519
Reference Entry
An encyclopedia entry for "Volts Alternating Current" (VAC) in computer hardware is presented. It refers to the amount of force with which an alternating electrical current flows through a circuit. The polarity of the current from 120 VAC changes or alternates 60 times per second. Most electrical outlets in the U.S. produce the 120 VAC.


Related Articles

  • Review of AC power theories under stationary and non-stationary, clean and distorted conditions. Kukacka, Leoš; Kraus, Jan; Kolár, Milan; Dupuis, Pascal; Zissis, Georges // IET Generation, Transmission & Distribution;2016, Vol. 10 Issue 1, p221 

    This study is a review of traditional and non-traditional electric power theories. Along with the standard IEEE 1459-2010, other definitions like the currents' physical components theory, p-q, p-q-r theories are briefly described with the accent on analysis of a priori unknown electric systems....

  • Response to “Comment on ‘Relation between space charge limited current and power loss in open drift tubes' ” [Phys Plasmas14, 094705 (2007)]. Biswas, Debabrata; Kumar, Raghwendra // Physics of Plasmas;Sep2007, Vol. 14 Issue 9, p094706 

    It is pointed out in this Response that as the collector plate is a grounded conductor whose potential is held fixed at zero, it is incorrect to assume that it becomes negatively charged due to the accumulation of electron space-charge. Further, the connection between the collector potential due...

  • Damping of Inter-Area Oscillation in Power Systems by Static Var Compensator (SVC) Using PMU-Acquired Remote Bus Voltage Angles. Varma, Rajiv K.; Gupta, R. P.; Auddy, Soubhik // International Journal of Emerging Electric Power Systems;2007, Vol. 8 Issue 4, p1 

    This paper presents a novel concept of Static Var Compensator (SVC) damping control using a weighted sum of bus voltage angles of remote generators that are responsible for causing interarea oscillations in power systems. These remote bus voltage angle signals are acquired through Phasor...

  • Placement of FACTS controllers using modal controllability indices to damp out power system oscillations. Kumar, B. Kalyan; Singh, S. N.; Srivastava, S. C. // IET Generation, Transmission & Distribution;Mar2007, Vol. 1 Issue 2, p209 

    Flexible ac transmission systems (FACTS) controllers are being used to damp out the power system oscillations. The effectiveness of these controllers depends on their optimal location in the power system network. A controllability index has been proposed to find the optimal location of the FACTS...

  • Risk-based placement of TCSC for transient stability enhancement. Abapour, Mehdi; Aliasghari, Parinaz; Haghifam, Mahmoud-Reza // IET Generation, Transmission & Distribution;2016, Vol. 10 Issue 13, p3296 

    TCSC is one of the most appropriate devices to improve the transient stability of power systems. Since in today's competitive environment, investments in power systems need to be cost-effective, in this study, a procedure is presented to determine whether using TCSC for transient stability...

  • Synchrophasor-based backup distance protection of multi-terminal transmission lines. Al-Emadi, Nasser A.; Ghorbani, Amir; Mehrjerdi, Hasan // IET Generation, Transmission & Distribution;2016, Vol. 10 Issue 13, p3304 

    The distance protection of multi-terminal transmission lines need to be redesigned due to possible changes in the backup protection emanating from probable infeed currents produced from tapped transmission lines. Furthermore, high-resistance fault is another factor that relay become under-reach...

  • Modelling and analysis of a synchronous machine-emulated active intertying converter in hybrid AC/DC microgrids. Alsiraji, Hasan Alrajhi; Radwan, Amr Ahmed A.; El-Shatshat, Ramadan // IET Generation, Transmission & Distribution;2018, Vol. 12 Issue 11, p2539 

    The integration of renewable energy resources into the electrical distribution systems faces several stability challenges especially in the low inertia conditions. To address these issues, this study introduces a virtual synchronous machine (VSM) control strategy for the intertying power...

  • On capability of different FACTS devices to mitigate a range of power quality phenomena. Liao, Huilian; Milanović, Jovica V. // IET Generation, Transmission & Distribution;2017, Vol. 11 Issue 5, p1202 

    This study investigates the impact of different flexible AC transmission system (FACTS) devices on critical power quality (PQ) phenomena including voltage sags, harmonics and unbalance from the perspective of both mitigation effect and potential negative impact. The FACTS devices, including...

  • Comprehensive review of gate-controlled series capacitor and applications in electrical systems. Ahmadi, Abdollah; Gandoman, Foad H.; Khaki, Behnam; Sharaf, Adel M.; Pou, Josep // IET Generation, Transmission & Distribution;2017, Vol. 11 Issue 5, p1085 

    Flexible AC transmission system series compensation, such as series switched capacitors including gate-controlled series capacitor (GCSC) plays an important role to enhance grid system transfer power, stability, power quality and loss reduction. GCSC devices are implemented using fixed or...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics