考虑运行约束的智能配电网分布式电源接纳能力研究

发布时间：2018-06-29 13:00

本文选题：分布式电源 + 接纳能力　；参考：《天津大学》2014年硕士论文

【摘要】：由于化石能源的逐渐枯竭和环境污染的日益严重,开发以风能、太阳能为代表的各类可再生能源,已经成为人类社会实现长期可持续发展的必然选择。但由于分布式电源出力具有随机性、波动性和间歇性等特征,因此分布式电源的高渗透率接入会给配电网的稳定运行带来深刻的影响,研究配电网对分布式电源的最大接纳能力对配电网的规划、运行以及分布式电源的广泛应用具有重要意义。本文考虑到分布式电源和负荷的运行特性对配电系统的影响,对配网接纳能力进行了较深入而系统的研究。本文首先对含分布式电源的智能配电网运行模拟的建模与仿真技术进行研究,着重分析了不同类型的分布式电源和控制元件的建模方法和考虑出力波动性的运行潮流分析方法。其次分析了分布式电源接入对配电网电压的影响,提出了计及电压水平和支路容量约束条件的智能配电网分布式电源接纳能力数学模型,同时考虑了分布式电源出力和负荷需求的运行约束对接纳能力的影响,根据模型的特点,提出了一种改进的模式搜索算法和基于蒙特卡洛的随机方法对接纳能力问题进行求解。最后,为了解决分布式电源接入所引起的电压越限问题,提出了一种基于储能装置的平滑功率的协调控制策略,以进一步提高配网的接纳能力。算例分析表明:分布式电源接入对配网运行带来深刻影响,本文提出的考虑运行约束的智能配电网分布式电源接纳能力模型准确有效,所提出的一种改进的模式搜索算法和基于蒙特卡洛的随机方法二者相互印证,能够对上述数学模型进行准确可靠地求解,基于储能装置的平滑功率的控制策略可以改善系统电压水平,有效缓解电压越限问题。
[Abstract]:Due to the depletion of fossil energy and the increasingly serious environmental pollution, the development of renewable energy, represented by wind energy and solar energy, has become an inevitable choice for the long-term sustainable development of human society. However, due to the randomness, volatility and intermittency of the distributed power generation, the high permeability access of the distributed generation will have a profound impact on the stable operation of the distribution network. It is of great significance to study the maximum acceptance capacity of distribution network for distribution network planning, operation and wide application of distributed generation. Considering the influence of distributed power generation and load characteristics on distribution system, this paper makes a deep and systematic study on the distribution network admission capacity. In this paper, the modeling and simulation technology of intelligent distribution network operation simulation with distributed power supply is studied, and the modeling methods of different types of distributed power supply and control elements and the operation power flow analysis method considering force fluctuation are analyzed. Secondly, the influence of distributed power supply access on distribution network voltage is analyzed, and a mathematical model of intelligent distribution network distributed power acceptance capacity considering voltage level and branch capacity constraints is proposed. At the same time, considering the influence of the operating constraints of distributed power generation and load requirements on the admission capacity, an improved pattern search algorithm and a stochastic method based on Monte Carlo are proposed to solve the admission capacity problem. Finally, in order to solve the problem of voltage overrun caused by distributed power access, a coordinated control strategy based on the smooth power of energy storage device is proposed to further improve the admission capacity of the distribution network. The example analysis shows that the distributed power access has a profound impact on the distribution network operation, and the model proposed in this paper, which considers the operation constraints, is accurate and effective. An improved pattern search algorithm and a stochastic method based on Monte Carlo are proposed to verify each other, and the above mathematical model can be solved accurately and reliably. The control strategy based on the smooth power of energy storage device can improve the voltage level of the system and effectively alleviate the problem of voltage overrun.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM732

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