Comparison analysis on damping mechanisms of power systems with induction generator based wind power generation

Abstract

The rotor structure varies with different types of wind power induction generator (WPIG), which leads to their different dynamic behaviors during power system disturbances. This paper proposes a generic implementation framework of explicit damping torque analysis to investigate the damping mechanisms of power system integrated with induction generator based wind power generation, so that the essential difference and inner connection between two main types of WPIG (i.e., DFIG and FSIG) in damping power system oscillation can be revealed. The linearized models which can represent DFIG and FSIG as well as three transitional wound rotor generators are established to facilitate the analytical comparison analysis. Phillips-Heffron system linearized model is employed to derive an explicit expression of damping torque contribution from main dynamic components of WPIGs. In the paper, 16-machine 5-area NYPS-NETS example system is used for the demonstration of proposed framework and comparison analysis. Both damping effectiveness and robustness of different WPIGs are extensively examined under multiple operating status, in order to provide useful guidance to system planner for the real-time operation of induction generator based wind generation.

Transition from Electromechanical Dynamics to Quasi-Electromechanical Dynamics Caused by Participation of Full Converter-Based Wind Power Generation

“…Apart from mitigating electromechanical oscillations with wind generation, the dynamic interaction between wind generation and the electromechanical dynamics has also drawn attention and is defined as a converter-driven stability problem [3]. Model validation and reduction techniques for different types of wind power induction generators (i.e., a fixed-speed induction generator (FSIG), DFIG) are discussed in terms of oscillatory stability issues [25][26][27]. The dynamic interaction between wind generation and the electromechanical modes of the nearby synchronous generators (SGs) poses threats to the small signal stability with high penetration levels of wind power, which is verified with modal analysis techniques [28].…”

Review on Oscillatory Stability in Power Grids With Renewable Energy Sources: Monitoring, Analysis, and Control Using Synchrophasor Technology

“…On the one hand, the PEC system participates in the existing conventional power oscillations (e.g., LFO) and makes the problems more complex [47], [48]; On the other hand, it also brings some new types of oscillations and frequent interactions among different types of RES PECs or between the RES PECs and weak power grid with different voltage levels, which are very different in nature from the LFO problem. For instance, an SSR with a resonant frequency of 20 Hz occurred between the DFIG-based wind farm and series compensation of the power grid in Texas (USA), which caused crowbar damage and disconnection of several DFIGs in 2009.…”

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“…By employing damping torque analysis in [22], the eigenvalue shift of i th eigenvalue λ i (i th EOM) of MMPS caused by the integration of PMSG controller can be calculated as ( ) ( ) ( )…”