Transient Stability Analysis in Wind-Integrated Power Systems

Transient stability analysis in wind-integrated power systems addresses the ability of the network to maintain synchronism and acceptable voltages following large disturbances such as faults or sudden loss of generation. The increasing penetration of wind energy converters, which do not inherently provide rotational inertia, has altered the dynamics of traditional power grids. Modern wind farms employ power-electronic interfaces—most commonly doubly-fed induction generators (DFIGs) and full-scale converter-connected turbines—that rely on phase-locked loops (PLLs) for grid synchronisation. These converters introduce nonlinear interactions and multiple time-scale phenomena, complicating the assessment of first-swing response and post-fault recovery. Analytic approaches encompass extended swing equations adapted to converter systems, direct methods based on Lyapunov or equal-area principles, and numerical techniques such as sum-of-squares optimisation for estimating regions of attraction. Small-signal and large-signal studies are both required to capture oscillatory modes and the limits of transient tolerance. Practical applications focus on compliance with grid-code fault-ride-through requirements, reactive current injection strategies and coordinated control schemes that enhance voltage support during and after disturbances. Globally, these methods underpin secure integration of renewable generation while mitigating risks of cascading outages.

Research from Nature Portfolio

No recent Nature Portfolio content available.

Transient Stability Analysis in Wind-Integrated Power Systems publication trend

The graph below shows the total number of articles in transient stability analysis in wind-integrated power systems across all publications each year (not limited to Nature Index journals).

Technical terms

Transient stability: The ability of a power system to remain in synchronism after a large disturbance.

Grid code: Regulatory requirements defining fault-ride-through and reactive power support during voltage dips.

Phase-locked loop (PLL): A control system used by converters to lock onto the grid voltage phase angle.

Voltage-source converter (VSC): A power-electronic device that converts DC to AC and controls real and reactive power injection.

Doubly-fed induction generator (DFIG): A wind turbine generator type allowing variable-speed operation via partially rated converters.

Low voltage ride-through (LVRT): The capability of a generator to remain connected and support voltage during grid faults.

Equal area criterion: A direct method for assessing the first-swing stability margin based on energy balance.

References

1. Transient synchronous stability analysis and enhancement control strategy of a PLL-based VSC system during asymmetric grid faults. Protection and Control of Modern Power Systems (2023).
2. Design-Oriented Transient Stability Analysis of PLL-Synchronized Voltage-Source Converters. IEEE Transactions on Power Electronics (2019).
3. Synchronizing Stability Analysis and Region of Attraction Estimation of Grid-Feeding VSCs Using Sum-of-Squares Programming. Frontiers in Energy Research (2020).
4. Multi-time scale dynamics in power electronics-dominated power systems. Frontiers of Mechanical Engineering (2017).
5. Stability Assessment and Enhanced Control of DFIG-Based WTs During Weak AC Grid. IEEE Access (2022).