智能电网环境下的间歇性能源微电网建设及协调控制技术研究

发布时间：2018-12-30 17:24

【摘要】：在许多偏远地区和独立海岛上,受地理条件的限制,建设与大电网互联的常规配电系统比较困难；或者已建设的配电系统比较薄弱,满足不了供电可靠性。在国家电网公司“坚强智能电网”发展战略的背景下,通过微电网技术,利用当地丰富的风电和光伏等清洁间歇性能源,构建小型地区电网,可以有效满足当地的负荷需求。但是风力发电和光伏发电的发电方式不同于传统的常规电源,具有明显的波动性、随机性和间歇性,对电网的规划建设和安全稳定运行提出了新的挑战。为了在满足负荷需求的同时保证电网的供电可靠性,建设坚强智能电网,亟需对含间歇式电源的微电网建设及其协调控制技术进行研究。本文主要分析国内外间歇性电源接入及微电网工程现状,对含间歇性能源的海岛微电网协调控制及优化运行技术进行了研究,分析了分布式电源的成本和社会效益度量,构建了微电网经济调度模型,对控制和调度策略进行了深入研究,并以砣矶岛微电网应用示范工程为例,分析了微电网工程的整体技术方案,提出了并网/孤网双模式运行综合控制方案,并研究了方案各部分的规划设计和具体实施。目前国内外微电网的研究比较多,但工程实践较少。长岛分布式电源接入及微电网示范工程,探索了在分布式电源接入、微电网协调控制策略等方面的内容,具有十分重要的研究价值。实际结果表明,本文提出的方案能够在满足负荷需求的同时有效保证电网的供电可靠性,符合实际工程要求。对间歇性能源微电网建设及协调控制技术的研究,在理论和工程实践的层面上都得到了验证,对未来的电网建设提供了宝贵经验。
[Abstract]:In many remote areas and independent islands, it is difficult to build a conventional distribution system interconnected with a large power grid due to geographical constraints, or the distribution system that has been built is weak and can not meet the reliability of power supply. Under the background of "strong smart grid" development strategy of State Grid Company, through microgrid technology, using abundant local clean intermittent energy, such as wind power and photovoltaic, to construct small regional power grid, can effectively meet the local load demand. However, wind power generation and photovoltaic generation are different from the traditional conventional power supply, with obvious volatility, randomness and intermittency, which poses a new challenge to the planning and construction of power grid and the safe and stable operation. In order to meet the demand of load and ensure the reliability of power supply and build a strong smart grid, it is urgent to study the construction of micro-grid with intermittent power supply and its coordinated control technology. This paper mainly analyzes the current situation of intermittent power supply access and microgrid engineering at home and abroad, studies the coordinated control and optimal operation technology of island microgrid with intermittent energy, and analyzes the cost and social benefits of distributed power generation. The economic dispatching model of microgrid is constructed, and the control and dispatching strategies are deeply studied. Taking the application demonstration project of Tuoji Island microgrid as an example, the overall technical scheme of microgrid engineering is analyzed. The integrated control scheme of grid-connected / isolated network operation is proposed, and the planning, design and implementation of each part of the scheme are studied. At present, there are many researches on microgrid at home and abroad, but the engineering practice is less. The long Island distributed power supply access and microgrid demonstration project have explored the contents of distributed power access and coordination control strategy of microgrid, which has very important research value. The practical results show that the proposed scheme can effectively ensure the power supply reliability of the power network and meet the practical engineering requirements while satisfying the load demand. The research on intermittent energy micro-grid construction and coordinated control technology has been verified in theory and engineering practice, which provides valuable experience for future power grid construction.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM732

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