Voltage Build-Up Analysis of Self-Excited Induction Generator With Multi-Timescale Reduced-Order Model

Abstract

Self-excited induction generator (SEIG) has received a lot of attentions for its increasing application in distributed generation systems with the essential feature of low cost. To analysis, the dynamic and transient performance of SEIG, several modifications of the mathematical models have been developed for improving the regulation of voltage and frequency. But these models are still complicated to be used in practice. Based on the transient equivalent circuit, a reduced-order model of SEIG with complex transformation in the two-phase stationary reference frame is realized for the transient analysis of voltage build-up. In this simplified model, the coefficients of the characteristic polynomial with multi-timescale time constants are proposed. Moreover, the physical interpretation of system transient behavior with the reconstructed time constants is established and visualized. Particularly, the upper and lower limits of the capacitance and speed for the SEIG with different parameters variation are simulated and analyzed respectively. The validation and the accuracy of the SEIG model are verified for the transient analysis of the voltage build-up. It is proved that the reduced-order model can be effectively used to insight the dynamic stability of SEIG voltage build-up with the multi-timescale. INDEX TERMS Autonomous system, characteristic polynomial equations, complex coefficients, multi-timescale, self-excited induction generator, voltage build-up analysis.

Informative Order-Reduction of Underdamped Third-Order Systems

“…6 represents an automatic fluid dispenser [19]. The closed-loop transfer function is shown in (16). = 3 +15 2 +50 + (16) It is hard to analytically link between the speed of the system and the value of the gain .…”

“…The authors in [15] reduced the order of active magnetic bearing and developed new control strategy. In [16], the model of self-excited induction generator is reduced based on complex transformation to avoid reaching nonpractical model. A reduced-order and enhanced observer-based control strategy for dc tot dc converter is presented in [17] to have better performance in terms of disturbance rejection and sensitivity to parameter variation.…”

Performance Enhancement of a Hybrid Renewable Energy System Accompanied with Energy Storage Unit Using Effective Control System

“…The investigation can also be presented in the form of designing new control topologies for different system units that can provide better performance compared with the already used types. For the wind generation system, different machine types were used, starting with self-excited induction generators with squirrel-cage rotor types [20] [21], which had the advantages of robustness and low maintenance requirements. But on the other hand, they suffered from the need for a separate excitation source.…”

Performance characteristics and reliability assessment of self‐excited induction generator for wind power generation

“…The voltage erection in SEIG at the rated speed is critical due to the switching of the 3‐ capacitor hub at no‐load. Authors in [11] have introduced the transient analyses under the voltage buildup process [12] of a stand‐alone SEIG by switching‐off (i) single capacitor for excitation, and (ii) multiple capacitors for excitation. It is observed that the SEIG constantly maintains self‐excitation and produces terminal voltage sufficiently on the two phases when any one of the phase capacitors is out of service.…”