كليدزني بهينه انتقال با استفاده از مدل هاي تعادل در بازارهاي برق

چكيده انگليسي :

Optimal Transmission Switching Using Equilibrium Models in Electricity Markets Behnam Fardafshari Talebazloo B fardafshari@ec iut ac ir Date of Submission 6 9 2015 Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan Iran 84156 83111Degree Master of Science Language Persian Supervisor s name Dr Mohammad Amin Latify Latify@cc iut ac irAbstract Transmission Switching TS is one of the most important tools in power system operation Practically TS is able to bring down the operating costs of the power system On the other hand increasing the competition level in electricity markets is one of the main concerns of electricity market operators Decreasing the market power is an usual way to attain a higher level of competition Since the market power is influenced by the network topology in this thesis the TS impacts on the market power and the method to consider this impact within the TS process are investigated At first the TS impacts on the market power are studied For this porpose Competition Boundary CB problem is developed to consider the TS In this problem minimizing or maximizing Herfindahl Hirschman Index HHI as a measure of market concentration subject to DC power flow constraints of the electrical network is modeled as a Quadratically Constrained Programming QCP problem Since HHI is a quadratic function of the firms production maximizing HHI results in a nonconvex optimization problem To be confident with achieving global optimum HHI is approximated as a piecewise linear function This approximation converts the extended CB problem to a Mixed Integer Linear Programming MILP problem Implementing the MILP model to the test cases shows that TS can influence the market power level through the network The impact is significant where the maximum HHI is considerd Moreover peak load conditions intensify the impact of TS on the market power These results point out that TS can adversely affects the market power and as a consecuence completion level if the TS is employed without considering this impact Next seasonally optimal transmission switching framework is proposed to minimize the operation cost over the study horizon considering market power of market participants The upper level problem determines the transmission line s to be switched out in order to minimize the operation cost over the horizon In the second level the profit of each generation companies is maximized by considering its market power Market clearing conditions which are common to all generation companies are modeled in the third level By using strong duality theorem and Karush Kuhn Tucker KKT conditions profit maximization problem of each generation company is modelled as a single level Mathematical Programming with Equilibrium Constraints MPEC problem To find the equilibrium among generation companies we should consider all the MPECs simultaneously which results in an Equilibrium Problem with Equilibrium Constraint EPEC model The EPEC is a set of equality and inequality constraints that represents the equilibrium conditions The second and the third levels of the mentioned three level optimization problem are replaced by the subsequent EPEC Therefore the three level optimization problem is converted to a single level optimization problem By using some linearization techniques the resultant single level optimization problem is converted to an MILP problem and is implemented on a three bus test case Numerical results show that employing proposed seasonal transmission switching framework can reduce the operation costs over the study horizon Moreover the lower market power level is achieved in comparison with the case in which the TS is not employed Keywords Transmission switching market power mixed integer linear programming electricitymarket equilibrium multi level optimization problem

فردافشاري تله بازلو، بهنام

كليدزني بهينه انتقال با استفاده از مدل هاي تعادل در بازارهاي برق

قدرت بازار , مساله بهينه سازي خطي عدد - صحيح , مساله بهينه سازي چند سطحي