海洋能微网系统控制技术研究

发布时间：2018-01-08 23:05

本文关键词：海洋能微网系统控制技术研究　出处：《华北电力大学》2015年硕士论文　论文类型：学位论文

【摘要】：伴随着经济的快速发展,近年来电网用电负荷大幅度增长,传统大电网的稳定性和可靠性受到越来越多的冲击。此外环境保护问题和能源危机问题日益凸显,电力行业的发展迎来了一定的考验。所以近年来结合了可再生能源和分布式发电的微网技术得到了世界上广泛的重视。而海洋能微网作为一种融合了多种分布式发电为海岛和近海区域供电的配电网,充分发挥了可再生能源和分布式发电的优势,环保、灵活、高效。本文研究的依托项目就是结合了波浪能、海流能发电和多元储能的海洋能集成微网供电系统。微网系统的控制技术是海洋能微网系统的主要研究内容之一。微电网中分布式电源具有多样性,它们的电能出力也存在间歇性和波动性。并且微网系统里往往使用多种电力电子设备,控制技术和策略相对复杂,对微网供电质量有影响。因此微网中多种分布式电源的协调运行,多种电力电子设备的有效配合和微网系统的电能转换有赖于微网的良好的控制策略。本文首先介绍了课题的研究背景,微网在国内外的发展情况,以及微网控制技术的研究现状。然后介绍了不同类型的分布式微网系统的主要结构和对应的基本控制,深入研究了适用于海洋能的微网分布式电源的控制技术和微网整体控制策略,并通过MATLAB/Simulink软件建模。基于300kW海洋能集成供电系统中的发电端的间歇性和波动性,根据海岛实际用电情况,针对本文项目采用的离网型海洋能微电网,结合储能控制技术,设计了适用于该项目的微网控制技术和策略,系统整体采用主从控制,其中储能系统采用基于SVPWM控制的V/f控制技术,海洋能分布式电源采用PQ控制,通过MATLAB/Simulink建立仿真,仿真结果验证了系统中控制策略的有效性和正确性。
[Abstract]:With the rapid development of economy, the power load of the power grid has increased greatly in recent years, and the stability and reliability of the traditional large power grid have been more and more affected. In addition, environmental protection and energy crisis are becoming increasingly prominent. The development of electric power industry has met a certain test. So in recent years, the microgrid technology which combines renewable energy and distributed generation has been paid more and more attention in the world. As a kind of ocean energy microgrid, the ocean energy microgrid has integrated many kinds of distributed. A distribution network that generates electricity for islands and offshore areas. It brings into full play the advantages of renewable energy and distributed power generation, environmental protection, flexibility and efficiency. Ocean energy integrated micro-grid power supply system with ocean current energy generation and multi-energy storage. The control technology of micro-grid system is one of the main research contents of oceanic energy micro-grid system. Their electric power output also has intermittent and volatility, and microgrid systems often use a variety of power electronic equipment, control technology and strategy is relatively complex. It has an effect on the power supply quality of microgrid, so the coordinated operation of many distributed power sources in microgrid. The effective coordination of various power electronic equipments and the power conversion of microgrid system depend on the good control strategy of microgrid. Firstly, this paper introduces the research background and the development of microgrid at home and abroad. Then the main structure and corresponding basic control of different types of distributed microgrid systems are introduced. The control technology and the overall control strategy of microgrid distributed power supply for ocean energy are studied in depth. Based on the intermittency and fluctuation of the power generation terminal in the 300kW ocean energy integrated power supply system, and based on the actual power consumption situation of the island, the model is modeled by MATLAB/Simulink software. Aiming at the off-grid marine energy micro-grid adopted in this paper, combined with the energy storage control technology, the micro-grid control technology and strategy suitable for the project are designed, and the master and slave control is adopted in the whole system. The energy storage system adopts the VR / f control technology based on the SVPWM control, the ocean energy distributed power supply adopts the PQ control, and the simulation is established by MATLAB/Simulink. Simulation results verify the validity and correctness of the control strategy in the system.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM727;TM612

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