Small Signal Stability Analysis of a Microgrid in Grid-Connected Mode

Article Computer Science, Information Systems

Small-signal stability and robustness analysis for microgrids under time-constrained DoS attacks and a mitigation adaptive secondary control method

Qiuye Sun et al.

Summary: With the integration of cyber and power systems, this paper analyzes the impact of DoS attacks on microgrids and proposes an adaptive secondary control technique to improve the stability of microgrids.

SCIENCE CHINA-INFORMATION SCIENCES (2022)

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Article Automation & Control Systems

Small-Signal Stability-Constrained Optimal Power Flow for Inverter Dominant Autonomous Microgrids

Deepak Pullaguram et al.

Summary: This article presents a solution to the small-signal stability-constrained optimal power flow (SSSC-OPF) for inverter-based ac microgrids. By embedding a small-signal stability constraint into the conventional OPF formulation and adopting a reduced-order model of the microgrid to reduce computational burden, two distinct convex relaxation approaches are developed to tackle the nonconvexity in the SSSC-OPF.

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS (2022)

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Article Engineering, Electrical & Electronic

Control design and small-Signal stability analysis of inverter-Based microgrids with inherent current limitation under extreme load conditions

A. G. Paspatis et al.

Summary: This paper proposes a novel droop controller that ensures a desired inverter current limitation and stable operation of inverter-based microgrids under extreme load conditions. By aligning the inverter current on the d axis, it achieves two main goals: limiting the RMS value of each inverter current during transients and providing rigorous proof of closed-loop system stability for the entire microgrid. The proposed approach simplifies the stability analysis of the microgrid and demonstrates superiority over conventional droop controllers through simulation and experimental validation.

ELECTRIC POWER SYSTEMS RESEARCH (2021)

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Article Green & Sustainable Science & Technology

Microgrid small-signal stability analysis considering dynamic load model

Aram Mahdavian et al.

Summary: This paper presents a small-signal model for an inverter-based microgrid operating in islanded mode, including a dynamic load model. The Exponential Recovery Load (ERL) model is introduced to study load dynamic behavior. System stability analysis is conducted by linearizing component equations, forming a state-space model, and deriving eigenvalues.

IET RENEWABLE POWER GENERATION (2021)

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Article Engineering, Electrical & Electronic

Understanding Small-Signal Stability of Low-Inertia Systems

Uros Markovic et al.

Summary: The paper investigates the impact of large-scale integration of renewable energy interfaced through power electronics on power system dynamics, developing a dynamic model and using modal analysis techniques to explore the stability properties of the system and proposing potential directions for improving system stability.

IEEE TRANSACTIONS ON POWER SYSTEMS (2021)

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Article Energy & Fuels

Comprehensive small-signal stability analysis of islanded synchronous generator-based microgrids

Mohammad Adelpour et al.

Summary: This paper presents a comprehensive small-signal stability analysis for synchronous generator-based microgrids, investigating the impact of loading conditions on droop-controlled and PQ-controlled SGs. It was found that droop-controlled SGs exhibit weaker stability, or even instability, in light loading conditions, while the operation of PQ-controlled SGs in such conditions can improve the stability of SG-based microgrids.

SUSTAINABLE ENERGY GRIDS & NETWORKS (2021)

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Article Energy & Fuels