What is it about?
There are two important approaches in operating power systems; the first is the economic approach which is determined by the structure of power system. The second one is the security and stability of power system. Unit Commitment (UC) is specifically one of the most important technical and economic programs in operating the power system by which the total cost of energy is optimized considering a considerable number of technical and economic constraints in a 24-hours or 1-week time horizon. These constraints include a number of economic issues concerning fuel price, on/off status of generation units, security constraints and also environmental and pollution constraints. UC plays an important role in economics and security of power system by determining the on/off schedule of generation units in different hours and the level of their power generation. Stability is a requirement in operation of power systems, therefore, the researchers are trying to propose models which are capable to at least improve one aspect of stability.In a power system, the generators which have similar dynamic behavior are called coherent generators and one of the methods to improve transient and dynamic stability of the system is to increase the coherency between generation units. In this paper a (UC) model considering the coherency of the generators is proposed. Increasing the coherency of the committed units mitigates the risk of power fluctuations in addition to improving the rotor angle stability.
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Why is it important?
There are two important approaches in operating power systems; the first is the economic approach which is determined by the structure of power system. The second one is the security and stability of power system. In recent years, the researchers have focused on modelling UC with the objective of improving the stability of power system. Stability is a equirement in operation of power systems, therefore, the researchers are trying to propose models which are capable to at least improve one aspect of stability.
Perspectives
Writing this article was a great pleasure as it has co-authors with whom I have had long standing collaborations. I hope that this article will help to create a new perspective on power system operation.
salar naghdalian
K. N. Toosi University of Technology
Read the Original
This page is a summary of: A Linear Daily Unit Commitment Model to Improve the Transient Stability of Power System, IET Generation Transmission & Distribution, April 2019, the Institution of Engineering and Technology (the IET),
DOI: 10.1049/iet-gtd.2018.5102.
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