A Data Driven-based Adaptive Wide-area Damping Control for back to back VSC-HVDC

This paper proposed a data driven-based adaptive wide-area damping controller (A-WADC) for back-to-back VSC-HVDC to suppress the low frequency oscillation in the large interconnected power system. The proposed A-WADC employs the wide-area measurement signals as input and adjust the active and reactive power control reference of VSC-HVDC simultaneously. The data driven-based goal representation heuristic dynamic programming was used to designed A-WADC to adapt to the change of operation conditions, which only requires the input and output data rather than the mathematic model of the controlled system. In addition, the adaptive delay compensator (ADC) was added for the A-WADC to effectively compensate the time-varying delays involved in wide area signal. Case studies were conducted under the equivalent simplified model of a practical power system with back-to-back voltage source converter based high voltage direct current transmission (VSC-HVDC). Simulation results verify that the proposed A-WADC can effectively suppress the low-frequency oscillation and improve the transient stability of the system under different operating conditions and communication delays