多微源组网的直流微电网运行控制研究
发布时间：2018-08-29 15:28
【摘要】：现在全球经济处于快速增长期,人类对能源的消耗和需求日益加剧,常规能源如石油、天然气、煤炭等面临枯竭的危险。因此,取之不尽用之不竭的太阳能成为各国能源发展日益重视的能源之一。太阳能以分布式电源的形式加入大电网。但太阳能发电受环境的影响较大,具有间歇性、随机性等特点,对大电网产生巨大冲击和影响。为了解决上述问题,将光伏发电等分布式电源以及负载组成微电网,进行集中管理。目前,微电网的研究主要集中于交流微电网方面。但随着大量直流微源的出现,以及对直流功率需求的提高,直流微电网逐渐得到了人们的重视。论文工作主要如下:1、对直流微电网系统内各微源及相应的变换器展开了工作原理的研究、数学建模及仿真。实现了太阳能光伏电池板的建模与仿真。对蓄电池的内部特性和工作原理进行了基本分析,以及蓄电池的数学建模及仿真。2、对电力电子变换器即双向DC/DC变换器进行了深入研究。3、研究了孤岛状态下的微源并联运行控制。介绍了直流微电网的控制模式:主从控制和对等控制。在详细研究主从控制策略和下垂控制策略的基础上,提出了基于自调节下垂系数的直流微电网多重主从控制策略。并且详细分析了恒流控制、恒压控制、下垂控制的控制方法。4、在MAILAB/Simulink仿真环境下验证了直流微电网各微源运行控制策略的有效性。在仿真建模的基础上搭建了低压直流微电网系统实验平台,验证了上述的运行控制方法。
[Abstract]:Now the global economy is in a period of rapid growth, human consumption and demand for energy is increasing, conventional energy sources such as oil, natural gas, coal and so on are in danger of drying up. Therefore, the inexhaustible solar energy has become one of the most important energy sources in various countries. Solar energy is added to large power grids in the form of distributed power sources. However, solar power generation is greatly affected by the environment and has the characteristics of intermittence and randomness, which has a great impact and influence on the large power grid. In order to solve the above problems, the distributed power generation and load such as photovoltaic generation are formed into microgrid, and centralized management is carried out. At present, the research of microgrid mainly focuses on AC microgrid. However, with the emergence of a large number of DC microsources and the improvement of the demand for DC power, the DC microgrid has been paid more and more attention. The main work of this paper is as follows: 1. The working principle, mathematical modeling and simulation of the microsources and the corresponding converters in the DC microgrid system are studied. The modeling and simulation of solar photovoltaic panels are realized. The internal characteristics and working principle of the battery are analyzed, and the mathematical modeling and simulation of the battery. The power electronic converter, that is, the bi-directional DC/DC converter, is studied in depth. The microsource parallel operation control in the isolated island state is studied. This paper introduces the control mode of DC microgrid: master-slave control and peer-to-peer control. Based on the detailed study of master-slave control strategy and droop control strategy, a multi-master-slave control strategy for DC microgrid based on self-regulating sag coefficient is proposed. The control methods of constant current control, constant voltage control and droop control are analyzed in detail. The effectiveness of the operation control strategy of each micro-source in DC microgrid is verified under the MAILAB/Simulink simulation environment. On the basis of simulation and modeling, the experiment platform of low voltage DC microgrid system is built, and the operation control method mentioned above is verified.
【学位授予单位】：安徽大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM727
本文编号：2211626
[Abstract]:Now the global economy is in a period of rapid growth, human consumption and demand for energy is increasing, conventional energy sources such as oil, natural gas, coal and so on are in danger of drying up. Therefore, the inexhaustible solar energy has become one of the most important energy sources in various countries. Solar energy is added to large power grids in the form of distributed power sources. However, solar power generation is greatly affected by the environment and has the characteristics of intermittence and randomness, which has a great impact and influence on the large power grid. In order to solve the above problems, the distributed power generation and load such as photovoltaic generation are formed into microgrid, and centralized management is carried out. At present, the research of microgrid mainly focuses on AC microgrid. However, with the emergence of a large number of DC microsources and the improvement of the demand for DC power, the DC microgrid has been paid more and more attention. The main work of this paper is as follows: 1. The working principle, mathematical modeling and simulation of the microsources and the corresponding converters in the DC microgrid system are studied. The modeling and simulation of solar photovoltaic panels are realized. The internal characteristics and working principle of the battery are analyzed, and the mathematical modeling and simulation of the battery. The power electronic converter, that is, the bi-directional DC/DC converter, is studied in depth. The microsource parallel operation control in the isolated island state is studied. This paper introduces the control mode of DC microgrid: master-slave control and peer-to-peer control. Based on the detailed study of master-slave control strategy and droop control strategy, a multi-master-slave control strategy for DC microgrid based on self-regulating sag coefficient is proposed. The control methods of constant current control, constant voltage control and droop control are analyzed in detail. The effectiveness of the operation control strategy of each micro-source in DC microgrid is verified under the MAILAB/Simulink simulation environment. On the basis of simulation and modeling, the experiment platform of low voltage DC microgrid system is built, and the operation control method mentioned above is verified.
【学位授予单位】：安徽大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM727
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