分布式发电及其与地区配电网接入研究

发布时间：2019-03-02 11:38

【摘要】：分布式发电是一种规模小、分布在负荷附近的发电设备,可实现可靠、经济、高效地发电。它具有规模小、占地少、可靠、清洁环保以及建设周期短等优点,在世界范围内得到了广泛的研究和应用。分布式发电的广泛应用解决了传统电力系统中的一些问题,但同时也带来了一些新的难题。论文首先分析了分布式发电接入电网后对配电网电能质量的影响。介绍了电力系统电能质量分析软件PCFLO的基本功能以及特点。根据分布式发电的并网技术特点,将其分为直接并网和通过电力电子逆变器并网两类,利用软件PCFLO仿真分析了两种不同并网技术的分布式发电并网后,接入点不同时对系统电能质量的影响。其次,研究了系统故障时分布式发电对系统保护装置的影响。介绍了我国配电系统典型的三段式保护配置及其整定原则。在仿真软件MATLAB/Simulink中建立了配电网络和分布式发电的模型,仿真分析了分布式发电的位置不同时对系统保护装置的影响。最后,设计了连云港大唐新浦光伏电站的并网系统,其中主要包括：一次系统、继电保护及安全自动装置、系统调度自动化以及系统通信环节的设计。而且,该光伏电站的安全稳定运行验证了本课题设计的正确性和有效性。
[Abstract]:Distributed power generation is a small-scale, distributed near the load generation equipment, can achieve reliable, economic, efficient generation. It has many advantages, such as small scale, small area, reliable, clean and environmental protection and short construction cycle, and has been widely studied and applied in the world. The widespread application of distributed generation solves some problems in traditional power systems, but also brings some new problems. Firstly, the influence of distributed generation on power quality of distribution network is analyzed. This paper introduces the basic functions and characteristics of power quality analysis software PCFLO in power system. According to the characteristics of grid-connected technology of distributed generation, it is divided into two types: direct grid-connected and power electronic inverter. Two kinds of distributed grid-connected power generation with different grid-connected technologies are simulated and analyzed by software PCFLO. The influence of the access point on the power quality of the system at the same time. Secondly, the influence of distributed power generation on the system protection device is studied. The typical three-stage protection configuration and setting principle of distribution system in China are introduced. The models of distribution network and distributed power generation are established in the simulation software MATLAB/Simulink. The influence of different locations of distributed generation on the protection device of the system is simulated and analyzed. Finally, the grid-connected system of Lianyungang Datang Xinpu photovoltaic power station is designed, including primary system, relay protection and safety automatic device, system dispatching automation and system communication link design. Moreover, the safe and stable operation of the photovoltaic power station verifies the correctness and effectiveness of the design.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM61;TM732

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