Simultaneous Scheduling of Multiple Frequency Services in Stochastic Unit Commitment
TLDR
A novel frequency-constrained stochastic unit commitment model is proposed which co-optimizes energy production along with the provision of synchronized and synthetic inertia, enhanced frequency response, primary frequency response and a dynamically-reduced largest power infeed.Abstract:
The reduced level of system inertia in low-carbon power grids increases the need for alternative frequency services. However, simultaneously optimizing the provision of these services in the scheduling process, subject to significant uncertainty, is a complex task given the challenge of linking the steady-state optimization with frequency dynamics. This paper proposes a novel frequency-constrained stochastic unit commitment model which, for the first time, co-optimizes energy production along with the provision of synchronized and synthetic inertia, enhanced frequency response, primary frequency response and a dynamically-reduced largest power infeed. The contribution of load damping is modeled through a linear inner approximation. The effectiveness of the proposed model is demonstrated through several case studies for Great Britain's 2030 power system, which highlight the synergies and conflicts among alternative frequency services, as well as the significant economic savings and carbon reduction achieved by simultaneously optimizing all these services.read more
Citations
More filters
Journal ArticleDOI
Towards Optimal System Scheduling With Synthetic Inertia Provision From Wind Turbines
TL;DR: In this article, a novel control framework for SI provision from wind turbines (WTs) is proposed, which eliminates the secondary frequency dip and allows the dynamics of SI from WTs to be analytically integrated into the system frequency dynamics.
Journal ArticleDOI
Optimal Portfolio of Distinct Frequency Response Services in Low-Inertia Systems
TL;DR: In this paper a closed-form solution to the differential equation describing frequency dynamics is proposed, which allows to obtain frequency-security algebraic constraints to be implemented in optimization routines.
Journal ArticleDOI
Two-Stage Chance-Constrained Stochastic Thermal Unit Commitment for Optimal Provision of Virtual Inertia in Wind-Storage Systems
TL;DR: A two-stage chance-constrained stochastic optimization (TSCCSO) model is proposed to find the optimal thermal unit commitment and the optimal placement of virtual inertia in a power grid using representative power system operation scenarios.
Journal ArticleDOI
Frequency control analysis based on unit commitment schemes with high wind power integration: A Spanish isolated power system case study
Ana Fernández-Guillamón,José Ignacio Sarasúa,Manuel Chazarra,Antonio Vigueras-Rodríguez,Daniel Fernández-Muñoz,Ángel Molina-García +5 more
TL;DR: Results provide a variety of influences from wind frequency control depending not only on the wind power integration, but also the generation units under operation, the rotational inertia reductions as well as the available reserves from each resource, aspects that have not been addressed previously in the specific literature to evaluate frequency excursions.
Posted Content
Challenges and opportunities of inertia estimation and forecasting in low-inertia power systems
TL;DR: In this article, the authors provide an overview and classification of inertia estimation methods, considering the time horizon the methods are applicable to, i.e., offline post mortem, online real time and forecasting methods, and the scope of the inertia estimation, e.g., system-wide, regional, generation, demand, individual resource.
References
More filters
Book
Power System Stability and Control
TL;DR: In this article, the authors present a model for the power system stability problem in modern power systems based on Synchronous Machine Theory and Modelling, and a model representation of the synchronous machine representation in stability studies.
Book
Model building in mathematical programming
TL;DR: The 5th edition of Model Building in Mathematical Programming discusses the general principles of model building in mathematical programming and demonstrates how they can be applied by using several simplified but practical problems from widely different contexts.
Journal ArticleDOI
Security-Constrained Unit Commitment With Linearized System Frequency Limit Constraints
Hamed Ahmadi,Hassan Ghasemi +1 more
TL;DR: In this paper, a modified system frequency response model is derived and used to find analytical representation of system minimum frequency in thermal-dominant multi-machine systems, and an effective piecewise linearization (PWL) technique is employed to linearize the nonlinear function representing the minimum system frequency, facilitating its integration in the SCUC problem.
Journal ArticleDOI
An Assessment of the Impact of Wind Generation on System Frequency Control
TL;DR: In this paper, the relationship between the total stored turbine kinetic energy and the total system power production for wind is studied in detail using simplified frequency control models and extensive simulations of wind penetration scenarios over an extended multi-year timeframe.
Journal ArticleDOI
Investigating the Impacts of Wind Generation Participation in Interconnection Frequency Response
TL;DR: In this paper, the authors evaluated the impact of the wind generation provision of these active power control strategies on a large, synchronous interconnection and found that the ability of wind power plants to provide PFR and a combination of synthetic inertial response and PFR significantly improved the frequency response performance.
Related Papers (5)
Security-Constrained Unit Commitment With Linearized System Frequency Limit Constraints
Hamed Ahmadi,Hassan Ghasemi +1 more