Abstract
This paper studies the parameter stability region of droop-controlled ac microgrid (MG) with static ZIP (constant impedance, constant current, and constant power) load and dynamic induction motor (IM) load using bifurcation theory. First, the dynamic model of the MG with ZIP and IM loads is developed. Next, bifurcation analysis is used to predict the bifurcation boundaries where MG becomes unstable. Saddle node and hopf bifurcation are detected in the studied system when parameters change. The stability region in parameters space is bounded by bifurcation boundaries. To improve the computing efficiency for predicting the stable region of parameters, the reduced-order models of MGs are developed based on singular perturbation method. Finally, numerical simulations and experiment are used to verify the analysis result and the effectiveness of the proposed strategy.
Original language | English |
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Article number | 8674588 |
Journal | IEEE Transactions on Smart Grid |
Volume | 10 |
Issue number | 6 |
Pages (from-to) | 6580 - 6591 |
Number of pages | 12 |
ISSN | 1949-3053 |
DOIs | |
Publication status | Published - Nov 2019 |
Keywords
- Islanded miocrogrid
- Parameter stability region
- Bifurcation theory
- Reduced-order model
- Singular perturbation method
- reduced-order model
- singular perturbation method
- parameter stability region
- Islanded microgrid
- bifurcation theory