![]() ![]() In order to vary the DC voltage, and therefore the reactive power, the VSC voltage angle (alpha) which is normally kept close to zero is temporarily phase shifted. The fundamental component of VSC voltage is controlled by varying the DC bus voltage. The amount of reactive power depends on the VSC voltage magnitude and on the transformer leakage reactances. If the voltage generated by the VSC is higher (or lower) than the system voltage, the STATCOM generates (or absorbs) reactive power. Please refer to the "power_48pulsegtoconverter" example to get details on the operation of the VSC.ĭuring steady-state operation the STATCOM control system keeps the fundamental component of the VSC voltage in phase with the system voltage. The fundamental components of voltages obtained on the 500 kV side of the transformers are added in phase by the serial connection of primary windings. The four sets of three-phase voltages obtained at the output of the four three-level inverters are applied to the secondary windings of four phase-shifting transformers (-15 deg., -7.5 deg., 7.5 deg., +7.5 deg. Look inside the STATCOM block to see how the VSC inverter is built. ![]() The 48-pulse STATCOM uses a Voltage-Sourced Converter (VSC) built of four 12-pulse three-level GTO inverters. A 100-Mvar STATCOM regulates voltage on a three-bus 500-kV system.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |