PROJECT TITLE :

Frequency Control of DFIG based Wind Power Penetrated Power Systems Using Switching Angle Controller and AGC - 2017

ABSTRACT:

This paper proposes a switching angle controller (SAC) and an automatic generation controller (AGC) for the doubly-fed induction generator (DFIG) to control the frequency of DFIG-primarily based wind power penetrated power systems. The concept of virtual rotor angle of the DFIG is defined. The virtual rotor angle is controlled by the SAC in a bang-bang manner such that the active power of the DFIG is regulated to provide frequency support to the external power grids. The output of the SAC is additionally used for the control of pitch angle to supply a short-term regulation of the mechanical power input to the DFIG, and therefore the long-term management of the mechanical power input is achieved with the AGC. Tiny-signal analysis is undertaken to verify the effectiveness of the SAC and the AGC. Simulation studies are allotted during a 2-machine Power System and a modified Kundur four-machine 2-space Power System, respectively. The frequency support performance of DFIGs having completely different control configurations is investigated. Modal analysis is undertaken to judge the result of the SAC and therefore the AGC in providing extra damping to the rotor oscillation modes of the changed Kundur four-machine two-space power system.