Transmission expansion planning in an electricity market environment

Pao Yue-kong Library Electronic Theses Database

Transmission expansion planning in an electricity market environment

 

Author: Jin, Qibo
Title: Transmission expansion planning in an electricity market environment
Degree: M.Sc.
Year: 2011
Subject: Electric power systems -- Planning.
Electric power systems -- Costs -- Econometric models.
Electric power transmission -- Economic aspects.
Hong Kong Polytechnic University -- Dissertations
Department: Dept. of Electrical Engineering
Pages: viii, 75 leaves : ill. (some col.) ; 30 cm.
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b2463052
URI: http://theses.lib.polyu.edu.hk/handle/200/6455
Abstract: Power system planning is a complex planning problem. The deregulation and reconstruction of the electric power industry have brought many fundamental changes to both system operation and planning. As a result, power system planning is becoming a more complicated multi-objective optimization problem that the conventional least-cost oriented planning method might no longer hold validity in many cases. For power system transmission planning, since the fast growth in load demand over the past few decades, expansion planning has become an important responsibility for transmission network service providers. Therefore, more advanced optimization techniques are required in handling expansion planning problems in a deregulated environment. In this thesis, a market-based static transmission expansion planning (TEP) approach has been developed, with the aim of minimizing both the transmission lines' construction cost and the CO₂ emission cost. Transmission profits prospect from the new transmission lines using MW-mile method has been added into the objective function as a negative contribution, which makes the whole planning model more pracitical. Considering CO₂ emission cost as one of the objectives in the expansion planning is a quite novel idea which might provide a probable different point of view in managing generation redispatch problem, in addition, it copes with the prevailing topic of reducing greenhouse gases (GHGs) pollution. Different scenarios of with and without wind energy penetration has been studied, so that the influences brought by the renewable energy embedded in a system on the objective function can be observed. Differential evolution (DE) algorithm based on DC power flow model has been applied as an optimization tool in finding the best expansion plan that meets the designed objectives. The proposed approach has been tested on the IEEE 14-bus system with numerical results and relevant analysis. Further work is necessary to develop the emission cost concept to a more realistic constraint in transmission planning problems.

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