分布式电源接入配电网的可靠性分析与研究
发布时间：2018-10-12 14:23
【摘要】：分布式电源凭借着其环境友好、经济高效、节能环保等优点被广泛接受,接入配电系统后,使配电系统由单电源供电的辐射型网络变为含有多个电源点的供电网络,导致配电系统的运行方式发生重大改变,需要重新对其可靠性进行评估。本文围绕此问题展开更深一步的研究。首先提出了基于馈线分区的配电网可靠性评估方案。全面考虑馈线、配电变压器、断路器、隔离开关等元件的故障,计算各个分区在不同情况下的可靠性指标,再以最小分区为单元遍历整个配电系统,评估配电网的可靠性。与传统的以元件为单元进行故障枚举评估配电系统可靠性的方法相比,该方法评估效率更高,考虑影响因素更全面,评估结果更接近实际情况。接着计及分布式电源及负荷的随机性,建立其功率输出的概率模型。为考虑风速与太阳能的随机性和间歇性,统计大量的风速及太阳能数据,将这些数据拟合,得出更贴近实际情况的概率分布函数,再由分布式发电系统的功率输出模型,建立分布式发电系统的概率密度函数;通过统计负荷功率与时间的关系,并将其随机性及波动性考虑在内,得出负荷功率的概率密度函数。从反映分区内输入输出关系出发,计算各负荷点可靠运行的概率。针对分布式电源接入配电系统,设计基于馈线分区与故障模式影响分析相结合的评估方案。规定分布式电源接入配电系统后的分区原则;基于故障模式影响分析法设计各类分区的搜索方案;再根据各负荷点可靠运行概率及分区方案求取各分区的可靠性指标,评估配电系统的可靠性。为分析不同容量及不同种类的分布式电源对配电网的影响,采用四种不同的分布式电源接入方案,对其结果进行分析。最后以IEEE-RBTS-BUS6为例,分别对四种不同的接入方案进行仿真分析。计算结果表明分布式电源的四种不同接入方案都不同程度地提高了系统的可靠性指标。
[Abstract]:With the advantages of friendly environment, economy, high efficiency, energy saving and environmental protection, the distributed power supply system is widely accepted. After connecting to the distribution system, the distribution system can be changed from a radiative network with a single power supply to a power supply network with multiple power points. It is necessary to re-evaluate the reliability of distribution system because of its significant change in operation mode. This paper focuses on the further study of this problem. Firstly, the reliability evaluation scheme of distribution network based on feeder area is proposed. Considering the faults of feeder, distribution transformer, circuit breaker, isolator and so on, the reliability index of each partition in different conditions is calculated, and then the distribution system is traversed with the minimum partition as the unit, and the reliability of distribution network is evaluated. Compared with the traditional fault enumeration method based on components, this method is more efficient, more comprehensive in considering the influence factors, and closer to the actual situation. Then considering the randomness of distributed power generation and load, the probabilistic model of power output is established. In order to consider the randomness and intermittency of wind speed and solar energy, a large amount of wind speed and solar energy data are counted, and the probability distribution function, which is closer to the actual situation, is obtained by fitting these data, and then the power output model of distributed generation system is obtained. The probability density function of distributed generation system is established, and the probability density function of load power is obtained by counting the relationship between load power and time, and taking its randomness and fluctuation into account. The probability of reliable operation of each load point is calculated by reflecting the relation between input and output within the partition. For distributed power supply access distribution system, an evaluation scheme based on feeder partition and fault mode impact analysis is designed. Prescribes the partition principle after the distributed power supply is connected to the distribution system, designs the search scheme of all kinds of districts based on the fault mode influence analysis method, and then calculates the reliability index of each district according to the reliable operation probability of each load point and the partition scheme, Assess the reliability of the distribution system. In order to analyze the influence of different capacity and different kinds of distributed generation on distribution network, four different kinds of distributed power supply access schemes are adopted, and the results are analyzed. Finally, taking IEEE-RBTS-BUS6 as an example, four different access schemes are simulated and analyzed. The results show that the four different access schemes of distributed power supply improve the reliability index of the system to some extent.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM732
本文编号：2266457
[Abstract]:With the advantages of friendly environment, economy, high efficiency, energy saving and environmental protection, the distributed power supply system is widely accepted. After connecting to the distribution system, the distribution system can be changed from a radiative network with a single power supply to a power supply network with multiple power points. It is necessary to re-evaluate the reliability of distribution system because of its significant change in operation mode. This paper focuses on the further study of this problem. Firstly, the reliability evaluation scheme of distribution network based on feeder area is proposed. Considering the faults of feeder, distribution transformer, circuit breaker, isolator and so on, the reliability index of each partition in different conditions is calculated, and then the distribution system is traversed with the minimum partition as the unit, and the reliability of distribution network is evaluated. Compared with the traditional fault enumeration method based on components, this method is more efficient, more comprehensive in considering the influence factors, and closer to the actual situation. Then considering the randomness of distributed power generation and load, the probabilistic model of power output is established. In order to consider the randomness and intermittency of wind speed and solar energy, a large amount of wind speed and solar energy data are counted, and the probability distribution function, which is closer to the actual situation, is obtained by fitting these data, and then the power output model of distributed generation system is obtained. The probability density function of distributed generation system is established, and the probability density function of load power is obtained by counting the relationship between load power and time, and taking its randomness and fluctuation into account. The probability of reliable operation of each load point is calculated by reflecting the relation between input and output within the partition. For distributed power supply access distribution system, an evaluation scheme based on feeder partition and fault mode impact analysis is designed. Prescribes the partition principle after the distributed power supply is connected to the distribution system, designs the search scheme of all kinds of districts based on the fault mode influence analysis method, and then calculates the reliability index of each district according to the reliable operation probability of each load point and the partition scheme, Assess the reliability of the distribution system. In order to analyze the influence of different capacity and different kinds of distributed generation on distribution network, four different kinds of distributed power supply access schemes are adopted, and the results are analyzed. Finally, taking IEEE-RBTS-BUS6 as an example, four different access schemes are simulated and analyzed. The results show that the four different access schemes of distributed power supply improve the reliability index of the system to some extent.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM732
【参考文献】
相关期刊论文 前10条
1 袁兆祥;孔祥玉;赵帅;;分布式电源接入配电系统可靠性分析方法[J];电力系统及其自动化学报;2013年04期
2 田洪迅;袁蓉;赵渊;;含分布式电源的配网可靠性概率计算[J];电网技术;2013年06期
3 向真;张伟;;基于改进最小路法的含分布式电源配电网供电可靠性评估[J];陕西电力;2012年07期
4 雷振;韦钢;蔡阳;张鑫;;含分布式电源区域节点的配电网模型和可靠性计算[J];电力系统自动化;2011年01期
5 康龙云;郭红霞;吴捷;陈思哲;;分布式电源及其接入电力系统时若干研究课题综述[J];电网技术;2010年11期
6 董晓峰;陆于平;;基于改进Prim算法的分布式发电孤岛划分方法[J];电网技术;2010年09期
7 丛伟;潘贞存;王成山;于春光;王伟;荀堂生;宋志明;;含高渗透率DG的配电系统区域纵联保护方案[J];电力系统自动化;2009年10期
8 孙瑜;Math Bollen;Graham Ault;;孤岛状态下含分布式电源的配电系统可靠性分析[J];电网技术;2008年23期
9 王成山;王守相;;分布式发电供能系统若干问题研究[J];电力系统自动化;2008年20期
10 丁磊;潘贞存;丛伟;;基于有根树的分布式发电孤岛搜索[J];中国电机工程学报;2008年25期
相关硕士学位论文 前1条
1 韩磊;计及分布式电源的配电网可靠性算法研究[D];山东大学;2009年
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