配电网规划中分布式电源定容和选址.pdf

配电网规划中的分布式电源定容与选址摘要随着我国经济的快速发展,对电力的需求日益增加,集中供电方式面临着很多挑战。新能源分布式电源能有效缓解当前面临的能源、生态环境和经济等方面问题,并得到了快速发展。分布式电源接入配电网的位置和容量直接影响配电系统的经济性和可靠性,对其进行研究对分布式发电技术的发展具有重要的理论和现实意义。阐述了分布式电源接入配电网后对配电网的网损、潮流分布、配电网电压、继电保护以及配电网供电可靠性和安全性等方面的影响。详细介绍了现有的状态量求解法以及人工智能算法用于求解分布式电源接入配电网位置和容量的配置方案。提出将群搜索优化算法用于求解分布式电源接入配电网的位置与容量的配置方案。定义了符合配电网节点拓扑结构的分支向量,并将分支向量搜索的方法与群搜索优化算法结合。该方法将智能寻优与物理寻优相结合,提高了全局寻优的效率。算例表明,该算法能够得到分布式电源接入配电网的最优位置和容量的合理配置方案,有效减少了配电网网损,同时也提高了整体的电压水平。考虑到风力发电机作为分布式电源接入配电网时,风力发电机出力的随机性和间歇性,建立以配电网网损期望值最小为目标的数学模型,提出了场景策略分析与群搜索优化算法结合求解风力发电机处于零输出状态、欠额定输出状态、额定输出状态的场景概率以及全场景状态下时接入配电网的位置和容量配置方案。仿真结果表明,提出的方法不仅能够适应单个风力发电机接入配电网的定容与选址,还能够适应多个风力发电机同时接入多个风电场情形下的定容与选址。关键词:分布式电源;网损;定容与选址;配电网规划;场景策略硕士学位论文 Abstract Along with China’Srapid economic development,the demand ofelectricity is, centralized power supply mode faces great distributed generation develops rapidly because DG could effectively alleviatethe current problems ofenvironment pollution,lack ofenergy,and economic..Position andcapacity essed distributedgenerations have adirectimpact on economy andreliability research on thelocation and capacity of DG isgreatsignificant tothedevelopment ofDG inboththeoretical and practical respects. The essed DG in work on activelOSS,the trend of power flow,voltage,protection,reliability andstability ofgrid are illustratedwhich is directly determined by the position and capacity of the accessed distributed generation..Besides,the existing work state analysis and artificial intelligencealgorithms tosolve thelocationand capacity configuration ofdistributed generation accessing work wasanalyzed indetail. Anew method based on group searchoptimizer(GSO)is proposed toconfirm location and capacity ofDQ Itdefines a branch vector tosatisfy the topology configuration isintegrated into the update method of branch vectoL The bines intelligent optimization with physical optimization,which improves thesearching efficiency example indicates theobta