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Determiniation of Optimal Interruptible Load Contracts in Smart Distribution Networks Considering Reliability Indices

Farrokhi, Mahdi | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 47881 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Fotuhi Firouzabad, Mahmud
  7. Abstract:
  8. Nowadays, considering the dependence of the life quality to the electric energy, exhaustion of the existing facilities in the distribution networks, and restructuring of the electric industry, the reliability improvement turns out to be one of the most important considerations in order to reducing the operational cost. Furthermore, the expansion of existing networks, substitution, and refinement of the exhausted facilities for improving the reliability can lead to remarkable expenses. Considering the limitations of budgets of distribution network companies, these plans cannot be put into practice. Therefore, operators and planners of this industry have to find ways to operate the existing network in a more efficient way and to a greater extent.In last years, using Interruptible Loads (ILs) has been considered as a way for improving the operational capabilities. In this method, some contracts are established with the consumers, according to which, the curtailment of all or part of their consumption in emergencies is permitted in exchange to receiving some incentives. Therefore, in emergency conditions in the distribution or upper network, the consumption of those loads can be cut without any extra costs for operators. In this manner, the operation condition would be improved. However, forasmuch as the contributions of load shedding of different consumers to that improvement are not the same, therefore it is essential to efficiently determine the amount of ILs in every node of the network. In this research, a model based on the cost/benefit analysis is developed in order to find the optimum amount of IL contracts in each load point. In this model, different technical and economical parameters such as reliability of the network, the amount of incentives, and the value of lost loads (VOLLs) are considered to determine the optimum amount of ILs. The optimum point would minimize the overall operator’s emergency cost, including the total cost of Expected Energy Not Supplied (EENS) related to non-contracted customers and the total payments have to be made to compensate ILs. The proposed network and the standard IEEE 33-bus system are considered as a test bed to demonstrate the capability of the model. The simulation results reveal the effectiveness of the proposed model not only to reduce the total costs that unexpected events may impose to distribution operators, but also the EENS of the network would be remarkably decreased
  9. Keywords:
  10. Demand Response ; Interruptible Load Contract ; Reliability ; Distributed Networks ; Smart Distribution Networks

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