微电网中储能单元的分布式功率平衡控制策略研究

发布时间：2018-05-06 12:54

本文选题：微电网 + 储能单元　；参考：《南京邮电大学》2017年硕士论文

【摘要】：近年来,微电网得到了广泛的关注和快速的发展,微电网是智能电网的重要组成部分。接入微电网是风能、太阳能等可再生能源发电的重要利用方式,但是可再生能源发电的间歇性和负荷需求的随机性所带来的影响给微电网功率平衡带来了新的挑战,尤其是在风能和太阳能高渗透率的情况下。对于自治的微电网来说,当可再生能源发电的功率波动导致发电量不等于总的负荷需求时,会导致功率不平衡问题。引入储能单元可以有效解决由可再生能源发电间歇性和负荷需求随机性引起微电网的功率不平衡问题。本文致力于通过分布式优化算法解决微电网中储能单元的功率平衡控制问题。具体工作如下:1)由于分布式控制策略的经济性、灵活性和鲁棒性,提出一种基于分布式梯度算法的储能单元控制策略以实现微电网功率平衡。本策略的控制目标是最小化储能系统充放电过程中的总功率损耗,并且考虑了储能单元充放电效率与其充放电功率和荷电状态(SOC)的线性关系。2)基于储能单元的等效电路模型,提出一种考虑内阻的微电网储能单元功率平衡控制策略。对微电网储能单元充电优化问题进行建模分析,并利用分布式算法对所建立模型进行优化求解。3)基于微电网储能单元功率平衡控制模型,提出一种抵御网络攻击的微电网储能单元分布式功率平衡控制策略。分析了微电网的网络控制系统分别在有无网络攻击时储能单元的响应情况,并设计抵御网络攻击的微电网储能单元分布式功率平衡控制策略。本文通过MATLAB仿真分析实现了每一项工作中的结果验证,通过仿真与分析得出每一项工作中所提出策略的有效性。
[Abstract]:In recent years, microgrid has received extensive attention and rapid development. Microgrid is an important part of smart grid. Access to microgrid is an important use of renewable energy generation, such as wind energy and solar energy, but the impact of intermittent renewable energy generation and randomness of load demand brings new challenges to the power balance of microgrid. Especially in the case of high wind and solar penetration. For autonomous microgrid, when the power fluctuation of renewable energy generation results in the power generation is not equal to the total load demand, it will lead to the power imbalance problem. The introduction of energy storage units can effectively solve the power imbalance problem of microgrid caused by the intermittent generation of renewable energy and the randomness of load demand. This paper is devoted to solving the power balance control problem of energy storage unit in microgrid by distributed optimization algorithm. Because of the economy, flexibility and robustness of the distributed control strategy, a distributed gradient algorithm based energy storage unit control strategy is proposed to achieve power balance in microgrid. The control goal of this strategy is to minimize the total power loss in the charging and discharging process of the energy storage system, and to consider the linear relationship between the charge and discharge efficiency of the energy storage unit and its charge / discharge power and the charged state of SOC. 2) based on the equivalent circuit model of the energy storage unit, the control goal of this strategy is to minimize the total power loss in the charging and discharging process of the energy storage system. This paper presents a power balance control strategy for energy storage unit in microgrid considering internal resistance. Based on the power balance control model of the energy storage unit in microgrid, the model is modeled and analyzed, and the distributed algorithm is used to optimize the model. A distributed power balance control strategy for microgrid energy storage unit against network attack is proposed. The response of the energy storage unit in the network control system of the microgrid is analyzed, and the distributed power balance control strategy for the energy storage unit of the microgrid is designed to resist the network attack. In this paper, the results of each work are verified by MATLAB simulation analysis, and the effectiveness of the proposed strategy is obtained by simulation and analysis.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM727

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