分布式发电微网系统建模及控制策略研究

发布时间：2018-06-27 05:00

本文选题：分布式发电 + 微电网　；参考：《北京交通大学》2014年硕士论文

【摘要】：随着化石能源的日益枯竭,以及新型能源的不断开发,分布式发电这种环保性强、灵活性高和模块化的高效新型发电方式展现了广阔的发展前景。但是分布式电源的大量接入为电网增加了多种不利因素。微电网技术的出现使得问题的解决出现了转机。该技术受到了更加广泛的关注,因此对分布式发电及微电网技术进行研究具有重要意义。目前相关研究中,光伏电池仿真模型众多,但没有系统的分类；很多光蓄混合发电系统的设计没有考虑过电流保护；微电网仿真研究缺乏系统的控制策略仿真平台。针对上述不足,本文重点针对光伏电池和SOFC电池这两种微电源,从分布式微电源建模仿真、单个分布式微电源并网控制、多个微电源组成微网后的运行控制三个层面进行了相关技术的研究,并构建了仿真基础平台。主要工作包括： 1、系统地分析并构建了三种光伏电池仿真模型,有效实现对实际光伏电池工况的模拟。对比分析了扰动观察法和增量电导法,优选扰动观察法作为光伏电池的MPPT跟踪方法。构建了固体氧化物燃料电池SOFC的中期动态仿真模型,并基于滞环电流跟踪控制法实现SOFC电池的有效输出。 2、设计了光蓄混合发电系统的结构,研究了光蓄混合发电系统双向DC/DC变流器的控制策略,经过仿真,验证了所设计光蓄混合发电系统的正确性。 3、研究了三种单微电源控制策略(PQ、V/f和Droop控制策略)的原理,通过构建仿真算例验证了每一种控制策略的有效性。针对微电网主从控制、对等控制,设计了相应的仿真算例,验证了两种微电网控制方式。 4、在构建光伏电池和SOFC电池模型的基础上,研究了光蓄混合发电系统控制、SOFC电池并网控制,以及微电网的运行与控制策略,从而构建了微电网的基础仿真平台,为后续研究工作提供了基础。
[Abstract]:With the increasing depletion of fossil energy and the continuous development of new energy, distributed power generation, which has strong environmental protection, high flexibility and modularization, has shown a broad development prospects. However, a large number of access to distributed power supply adds a variety of disadvantages to the grid. The emergence of microgrid technology makes the solution of the problem a turnaround. This technology has attracted more and more attention, so it is of great significance to study the technology of distributed generation and microgrid. At present, there are many photovoltaic cell simulation models, but no systematic classification; many optical storage hybrid generation system design did not consider the over-current protection; microgrid simulation research lack of system control strategy simulation platform. In view of the above shortcomings, this paper focuses on photovoltaic cell and SOFC battery, modeling and simulation of distributed micro-power supply, single distributed micro-power source connected to the grid control, Three layers of microgrid operation control are studied, and the basic simulation platform is constructed. The main work is as follows: 1. Three kinds of photovoltaic cell simulation models are analyzed and constructed systematically, which can effectively realize the simulation of the actual photovoltaic cell operating conditions. The perturbation observation method, the incremental conductance method and the optimal perturbation observation method are compared and analyzed as the MPPT tracking method for photovoltaic cells. The medium-term dynamic simulation model of SOFC for solid oxide fuel cell (SOFC) is constructed, and the effective output of SOFC battery is realized based on hysteresis current tracking control method. 2. The structure of hybrid photovoltaic power generation system is designed. The control strategy of the bidirectional DC / DC converter of optical storage hybrid generation system is studied. The correctness of the designed hybrid optical storage power generation system is verified by simulation. 3. The principle of three single micro power supply control strategies (PQ / V / f and Droop control strategy) is studied. The effectiveness of each control strategy is verified by a simulation example. For microgrid master-slave control, peer-to-peer control, a corresponding simulation example is designed to verify the two microgrid control methods. 4. Based on the construction of photovoltaic cell and SOFC cell model, The SOFC battery grid-connected control of optical storage hybrid generation system and the operation and control strategy of micro-grid are studied. The basic simulation platform of micro-grid is constructed, which provides the basis for further research.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM743

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