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Distribution System Reactive Power Optimization Based On Voltage Control Target Tracking

Posted on:2017-11-19Degree:MasterType:Thesis
Country:ChinaCandidate:C CuiFull Text:PDF
GTID:2322330509460082Subject:Electrical engineering
Abstract/Summary:PDF Full Text Request
The objective of reactive power optimization for distribution system is delivering the reactive power in the distribution system, reasonably and effectively. Traditional methods mainly focus on reducing the active power loss. However, with the implementation of the Electricity Law, the issue of voltage quality has been highlighted as the commercial operation requires. Thus, voltage quality should be regarded as the primary objective for reactive power optimization for distribution system. Besides, reducing the active power loss ought to be taken into consideration as well. In addition, the integration of large numbers of Distributed Generators(DGs) has complicated the reactive power optimization problem. Therefore, it is imperative to research on reactive power optimization for distribution system considering the integration of DGs. This paper aims to explore a practical reactive power optimization method which gives priority to the voltage quality of the target distribution system. The method is based on the practical experience of the distribution system operation.Firstly, this paper briefly describes the basic theories of distribution system reactive power optimization, and discusses the influence of DGs on distribution system reactive power optimization from two aspects, voltage quality and active power loss. Furthermore, a multi-objective optimization model has been established with the goal of minimizing voltage deviation and active power loss. Improved particle swarm- tabu search algorithm has been used to solve the problem.Secondly, learning from the traditional distribution system reactive power optimization method, a new reactive power optimization method based on voltage control target tracking is proposed. The idea of this method has been elaborated and an optimization model has been established. In order to facilitate the practical application, a reactive power optimization control system is further designed. Through tracking the real-time voltage of the target node, this control system achieves the objective which combines the correction control and prevention control. Meanwhile, this control system considers the scheme under different scenarios such as normal and emergency.Finally, this optimization method is applied to the two examples for the simulation analysis. The simulation results verify the feasibility and the practicability of this method.
Keywords/Search Tags:reactive power optimization for distribution system, Distributed Generators(DGs), improved particle swarm-tabu search algorithm, voltage quality, voltage control target tracking, reactive power optimization control system
PDF Full Text Request
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