Integration and enhancement of load frequency control design for diverse sources power system via DFIG based wind power generation and interonnected via parallel HVDC/EHVAC tie-lines

The present paper focus on the integration as well as contribution of doubly fed induction generator (DFIG) based wind turbines in load frequency control (LFC) of the modern electric power system in order to supply the quality as well as pollution free electric power to the modern power customers. In addition, the control areas are connected via HVDC tie-line parallel to EHVAC tieline with diverse sources i.e. hydro, thermal and gas based power generations in interconnected power system areas. Efforts have been made to propose an optimal LFC design based on the feedback of few state variables which are accessible for the measurement and contains good information of the complete power system. The LFC design based on few states are implemented and the obtained results are presented to show the LFC enhancement with DFIG integration and DFIG integration with installation of parallel HVDC/EHVAC tie-lines between control areas. Atlast, the beauty and effectiveness of LFC based on few states are compared with LFC design depends on all system states under similar working conditions and the application results are presented.