Robust Unit Commitment Including Frequency Stability Constraints
TLDR
In this article, the authors proposed a robust unit commitment approach for power systems with cost-based economic dispatch, which is suitable for power plants with variable generation technologies such as wind power and photovoltaic generation.Abstract:
An increased use of variable generation technologies such as wind power and photovoltaic generation can have important effects on system frequency performance during normal operation as well as contingencies. The main reasons are the operational principles and inherent characteristics of these power plants like operation at maximum power point and no inertial response during power system imbalances. This has led to new challenges for Transmission System Operators in terms of ensuring system security during contingencies. In this context, this paper proposes a Robust Unit Commitment including a set of additional frequency stability constraints. To do this, a simplified dynamic model of the initial system frequency response is used in combination with historical frequency nadir data during contingencies. The proposed approach is especially suitable for power systems with cost-based economic dispatch like those in most Latin American countries. The study is done considering the Northern Interconnected System of Chile, a 50-Hz medium size isolated power system. The results obtained were validated by means of dynamic simulations of different system contingencies.read more
Citations
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Journal ArticleDOI
Evaluating rotational inertia as a component of grid reliability with high penetrations of variable renewable energy
Samuel C. Johnson,Dimitri J. Papageorgiou,Dharik S. Mallapragada,Thomas A. Deetjen,Joshua D. Rhodes,Michael E. Webber +5 more
TL;DR: In this article, the authors used several renewable energy penetration scenarios to determine when an electric grid might be more vulnerable to frequency contingencies, such as a generator outage, and used unit commitment and dispatch modeling to quantify system inertia.
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Stochastic Unit Commitment in Low-Inertia Grids
Matthieu Paturet,Uros Markovic,Stefanos Delikaraoglou,Evangelos Vrettos,Petros Aristidou,Gabriela Hug +5 more
TL;DR: In this paper, the authors studied the unit commitment problem in a power network with low levels of rotational inertia and derived frequency-related constraints from a uniform system frequency response model that incorporates dynamics and controls of both synchronous generators and grid-forming inverters.
Journal ArticleDOI
Understanding the impact of non-synchronous wind and solar generation on grid stability and identifying mitigation pathways
TL;DR: In this paper, an inertia-constrained unit commitment and dispatch model was used to study the stability of future grid scenarios with high penetrations of non-synchronous renewable energy generation under a variety of technology scenarios.
Proceedings ArticleDOI
An analysis of the effects and dependency of wind power penetration on system frequency regulation
Nga Nguyen,Joydeep Mitra +1 more
TL;DR: In this article, the effect of wind power on frequency regulation capability at different penetration levels is examined and the analytical and simulation results presented here provide some guidance on determining maximum wind power penetration level given a frequency deviation limit.
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Assessing the impact of inertia and reactive power constraints in generation expansion planning
Sonja Wogrin,Diego A. Tejada-Arango,Diego A. Tejada-Arango,Stefanos Delikaraoglou,Audun Botterud +4 more
TL;DR: The novel Low-carbon Expansion Generation Optimization model is proposed, which explicitly accounts for: unit commitment constraints, Rate of Change of Frequency inertia requirements and virtual inertia provision, and, a second-order cone programming approximation of the AC power flow, accounting for reactive power constraints.
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