摘要分布式发电(Distributed Generation，DG)利用可再生和新能源提供清洁、高效的电能，DG并网发电将成为未来发展趋势。针对分布式电源（Distributed Generators，DGs）类型的多样性及其接入对配电系统影响的差异性，研究了不同类型的DGs在接入位置、接入容量发生变化时对系统电压及网损影响的变化规律。通过对不同类型DGs的分析处理，运用前推回代法潮流计算程序对其接入辐射状配电网前后的电压分布、有功损耗进行精确计算，并采用系统电压改善程度、有功损耗改善程度指标来评价不同类型DGs对系统电压和网损的影响程度。通过IEEE33节点系统的仿真试验，全面总结了不同类型DGs在配电网中接入位置、出力、等方面改变时电压及功率损耗的变化规律。67760

毕业论文关键词  分布式电源 前推回代法 电压分布 有功损耗 配电网

毕业设计说明书（论文）外文摘要

Title    Analysis of DG influences on system voltage and losses in distribution network                                                  

Abstract Distributed generation(DG),using renewable energy and new energy, providing clean and efficient energy, being introduced to distribution network will be the future trend.According to the persities of DGs and the differences of its influences on the distribution networks this paper studies on the change law of system voltage and active power losses when all kinds of DGs are connected to the distributed networks on the condition of different access capacities and different access positions Based on the improved back/forward sweep methods ,the voltage distribution and active power losses before and after accessing to radiating distribution network are calculated corresponding to different types of DGs .The Voltage Profile Improvement Index (VPII) and Active Power Loss Improvement Index(APLII) are adopted to evaluate the DGs influences on the system voltage and net losses of distribution networks Plenty of simulations are carried out on the IEEE33 bus test system. The results show the change law of voltage and active power loss when accessing locations , output and layout of different types of DGs are changed. 

Key words  distributed generation  back/forward sweep methods  voltage

           Profile  active power loss  distribution network 

目次

1  绪论 1

1.1  研究背景及意义 1

1.1.1  分布式电源的概念 1

1.1.2  分布式电源兴起的技术背景 1

1.1.3  分布式发电的市场前景 1

1.1.4  研究意义 1

1.2  国内外研究情况 2

1.2.1  分布式发电在电力系统的应用研究现状 2

1.2.2  DG接入对配网电压和损耗影响的研究 3

1.3  本文的主要工作 3

2  分布式发电技术 5

2.1  常见的分布式发电技术 5

2.1.1  微型燃气轮机技术 5

2.1.2  太阳能光伏发电技术 5

2.1.3  风力发电技术 6

2.1.4  燃料电池技术