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Optimizing Real-time Energy and Ancillary Service Markets in the Presence of Strategic Players

Rayati, Mohammad | 2019

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 52150 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Ranjbar, Ali Mohammad
  7. Abstract:
  8. Nowadays, the capacity of renewable energy sources in electrical grids and electricity markets has been grown. Due to the fluctuation of renewable energy sources, one of the main challenges of system operators is the managment of renewable energy uncertaintites impacts on the performance of frequency control systems. A method for solving this challenge is to develop the ancillary service markets, e.g., frequency reserve and frequency regulation markets. In this thesis, an optimal equilibrium of different forms of ancillary service markets are analyzed. In addition, a dynamic real-time and resilient market mechanism is developed to capture the strategic behaviors of players while the optimal power flow is resulted.It is worth mentioning that due to the intermittency of renewable energy sources, the frequency control market mechanisms in the presence of price-maker and strategic players becomes more imperative as the stability of power system frequency is a public good and the free-rider problem may be arisen for the provisioning of public goods. In this first part of this thesis, the equilibrium of the game among the generating units, belonging to price-maker and price-taker players, in the exisiting market mechanisms are analyzed by proposing an equilibrium problem with equilibrium constraints model. To calculate the equilibrium of price-maker players in the exisiting market mechanisms, a number of bilevel optimization problems should be solved simultaneously. Therefore, the problem of calculating equilibrium is highly non-convex. Solving a number of bi-level optimization problems simultaneously leads us to a number of equilibriums. Here, a focal equilibrium named as optimal equilibrium is introduced, in which the market participants do not have any incentive to deviate and frequency stability is improved. This optimal dispatch can be adopted by system operator to obtain a focal equilibrium instead of other dispatches due to the imperfect competition.In the second part of thesis, a hierarchical state-space model is presented for the frequency regulation and a dynamic market mechanism in a smart grid environment. To achieve a resilient control, a framework based on cloud computing is proposed for the communication network. Benefits and challenges of the cloud-based framework are also described. To optimize the operation of the proposed framework, the control parameters are tuned robustly using the Tsypkin-Polyak theorem
  9. Keywords:
  10. Ancillary Service Markets ; Mechanism Design ; Game Theory ; Optimization ; Frequency Control

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