微电网谐波治理与无功控制方法的研究

发布时间：2018-05-31 00:22

本文选题：微电网 + 谐波治理　；参考：《河北工业大学》2014年硕士论文

【摘要】：微电网作为未来前景应用广阔的电力系统电网新型结构，，其廉价，环保的发电模式，分布，灵活的输电方式，在资源日益枯竭，集中大电网事故不断的今天，成为了一个广受瞩目的研究热点。但是，目前为止微电网的研究还不甚成熟，经常遇到控制方法不够精确，运行方案不够稳定等问题。特别是大量分布式电源的并网运行极大的影响了微电网中的电能质量，并给潮流分布等带来了不确定性。本文微电网为研究对象，着重考虑分布式电源的对系统的影响，对适合谐波治理与无功控制的相关方法进行了探究。本文首先阐述了微电网的基本构成，以及微电网谐波的危害以及无功分布对系统的影响。提出了常用的谐波治理原则与无功控制方法。根据分布式电源的相关特性，建立了相应的数学模型，总结出各自的并网接口方式。针对微电网系统特别是分布式电源产生的谐波进行了深入分析，提出了基于并联型有源滤波器的谐波治理方案。着重研究了分布式电源的特殊节点类型在牛顿拉夫逊潮流计算的处理方式.总结出一套适合微电网的牛顿拉夫逊潮流计算流程。并分别从分布式电源类型，容量，接入位置对微电网系统节点电压、网损进行了研究。通过改进遗传算法，提出了基于遗传算法的无功优化方案，通过对建立的33节点微电网系统进行算例方针，验证优化方案的可行性。文章最后，将多Agent系统尝试引入微电网无功控制当中，在微电网运行异常时，通过协调各级Agent工作，验证了该系统的实时性，可靠性。为今后多Agent系统在微电网上的深入应用，提供了一些思路。
[Abstract]:As a new structure of power system with broad application in the future, microgrid has cheap, environmentally friendly power generation mode, distribution and flexible transmission mode. Today, when resources are increasingly exhausted and large power grid accidents are concentrated, It has become a hot research topic. However, so far, the research of microgrid is not very mature, often encountered some problems, such as the control method is not accurate enough, the operation scheme is not stable enough and so on. Especially, the power quality in microgrid is greatly affected by the grid-connected operation of a large number of distributed power sources, which brings uncertainty to the distribution of power flow and so on. This paper focuses on the influence of distributed power generation on the system and probes into the relevant methods suitable for harmonic control and reactive power control. In this paper, the basic structure of microgrid, the harm of harmonic and the influence of reactive power distribution on the system are discussed. The common harmonic control principles and reactive power control methods are put forward. According to the characteristics of distributed power generation, the corresponding mathematical models are established and their grid-connected interfaces are summarized. The harmonic generation of microgrid system, especially distributed generation, is deeply analyzed, and a harmonic control scheme based on shunt active power filter is proposed. The processing method of special node type of distributed power generation in Newton Raphson power flow calculation is studied. A set of Newton-Raphson power flow calculation process suitable for microgrid is summarized. The node voltage and network loss of microgrid system are studied from distributed generation type, capacity and access location. By improving genetic algorithm, the reactive power optimization scheme based on genetic algorithm is proposed. The feasibility of the optimization scheme is verified by the example of the established 33-bus microgrid system. Finally, the multi-Agent system is introduced into the reactive power control of microgrid. When the microgrid is running abnormal, the real-time and reliability of the system is verified by coordinating all levels of Agent. Some ideas are provided for the further application of multi-Agent system in microgrid in the future.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM73

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