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Analysis Of The East China Wind Power And Research On Energy Storage System Size

Posted on:2014-02-14Degree:MasterType:Thesis
Country:ChinaCandidate:L N LiFull Text:PDF
GTID:2232330395489074Subject:Power system and its automation
Abstract/Summary:PDF Full Text Request
The distributed generation, especially the renewable energy sources including photovoltaic generation and wind power generation, has the characteristics of intermittence, variability and uncertainty. It brings more challenges to power systems operation when the percentage of the distributed generation in the power system becomes higher. With the capability of both charging and discharging, the energy storage system (ESS) can complement the uncertainty of renewable generation, In this thesis, the development of wind East China wind power is investigated, and the ESS size based on wind output uncertainty is analyzed as follow.First, the operation condition of East China power grid is introduced, including the load characteristics and peak shaving. Then, according to the wind source distribution in East China, the previous development and the future prospect of wind power generation are investigated. Based on this, the impacts of large scale wind power generation on power grid are analyzed, such as the power quality, peak shaving and transient stability. Finally, in terms of the trend and possible challenges of future development of wind power generation, some suggestions are proposed.Aiming at the uncertainty of wind power generation, a chance-constrained programming based ESS sizing model is proposed. Considering the constraints of wind power utilization and state of charge (SOC) of ESS, the least cost of ESS is selected as the objective, and the relationship between the optimal cost and the confidence level of wind output fluctuation within a certain limit is given. Genetic algorithm is used to solve the optimization problem, in which Monte-Carlo method is applied to deal with the chance-constrained problem. Furthermore, a control strategy is proposed to command ESS to charge or discharge with concerning discharge penalty, so as to extend the life span. The results indicate that the configuration of ESS capacity provides a tradeoff between power quality and cost. Compared to traditional sizing method, the proposed one is more flexible and practical.
Keywords/Search Tags:East China Grid, Wind power generation, Energy storage systemChance-constrained programming, Uncertainty, Sizing optimization
PDF Full Text Request
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