The complex power injection of the D-STATCOM can be expressed as, = It may be mentioned that the effectiveness of the D-STATCOM in correcting voltage sag depends on the value of Zthor fault level of the load bus. When the shunt injected current Ishis kept in quadrature with VL, the desired voltage correction can be achieved without injecting any active power into the system. On the other hand, when the value of Ishis minimized, the same voltage correction can be achieved with minimum apparent power injection into the system. The control scheme for the D-STATCOM follows the same principle as for DVR. The switching frequency is set at 475 Hz. 3.2 Test system : Figure shows the test system used to carry out the various D-STATCOM simulations. Fig 3.2 Single line diagram of the test system for D-STATCOM. Fig 3.2.1 Simulink model of D-STATCOM test system. 3.3 Mathematical modeling of DSTATCOM: DSTATCOM is a shunt device which hast the capability to inject or absorb both active and reactive current. The reactive power output of a D-STATCOM is proportional to the system
The complex power injection of the D-STATCOM can be expressed as, = It may be mentioned that the effectiveness of the D-STATCOM in correcting voltage sag depends on the value of Zthor fault level of the load bus. When the shunt injected current Ishis kept in quadrature with VL, the desired voltage correction can be achieved without injecting any active power into the system. On the other hand, when the value of Ishis minimized, the same voltage correction can be achieved with minimum apparent power injection into the system. The control scheme for the D-STATCOM follows the same principle as for DVR. The switching frequency is set at 475 Hz. 3.2 Test system : Figure shows the test system used to carry out the various D-STATCOM simulations. Fig 3.2 Single line diagram of the test system for D-STATCOM. Fig 3.2.1 Simulink model of D-STATCOM test system. 3.3 Mathematical modeling of DSTATCOM: DSTATCOM is a shunt device which hast the capability to inject or absorb both active and reactive current. The reactive power output of a D-STATCOM is proportional to the system
7_d-statcom.docx