主动配电网网络分析算法研究

发布时间：2018-06-28 04:59

本文选题：主动配电网 + 网络分析　；参考：《浙江大学》2016年硕士论文

【摘要】：主动配电网是可以综合控制分布式能源(分布式发电、柔性负载和储能)的配电网。本文对主动配电网中的网络分析算法进行了研究,研究内容主要包括不良数据辨识、状态估计、潮流计算三个方面。在不良数据辨识方面,提出了基于聚类分析的不良数据辨识方法。该方法无需量测的权重信息,只需要量测数据就可辨识,计算速度快,便于并行处理。测试结果表明,当支路有功、无功和两端点电压量测中存在单个不良数据时,运用该方法可正确辨识出不良数据,计算速度满足实际系统的要求。在状态估计方面,提出了基于非线性规划的状态估计方法,建立了四种不同的计算模型。该方法能够方便地处理各种约束,具有很强的通用性。配电测试系统和实际系统算例的测试结果表明该方法能够满足实时状态估计的要求。在配电网三相潮流计算方面,提出了基于回路电流的配电网潮流计算方法,并提出了多种分布式电源的潮流计算模型,研究了基于回路电流的潮流计算方法中对异步电机的处理。该方法可以直接对含有环的配电网进行潮流计算,并能处理多种类型的分布式电源。对IEEE标准配电测试系统的测试结果表明该方法对包含环网和分布式电源的配电系统具有良好的收敛性和计算效率,能够满足实际工程的需要。
[Abstract]:Active distribution network is a distribution network that can control distributed energy (distributed generation, flexible load and energy storage). In this paper, the algorithm of network analysis in active distribution network is studied, which includes three aspects: bad data identification, state estimation and power flow calculation. In the aspect of bad data identification, a method of bad data identification based on clustering analysis is proposed. This method does not need the weight information of measurement, but only needs the measured data to be identifiable, the calculation speed is fast, and it is easy to process in parallel. The test results show that when there is a single bad data in the measurement of active, reactive power and voltage at both ends of the branch, the bad data can be correctly identified by this method, and the calculation speed can meet the requirements of the actual system. In the aspect of state estimation, a state estimation method based on nonlinear programming is proposed, and four different computational models are established. This method can deal with all kinds of constraints conveniently and has strong generality. The test results of distribution test system and actual system show that the method can meet the requirements of real-time state estimation. In the aspect of three-phase power flow calculation of distribution network, a power flow calculation method based on loop current is proposed, and a variety of power flow calculation models of distributed generation are proposed. The treatment of asynchronous motor in power flow calculation method based on loop current is studied. This method can directly calculate the power flow of the distribution network with ring, and can deal with many kinds of distributed generation. The test results of IEEE standard distribution test system show that the proposed method has good convergence and computational efficiency for the distribution system with ring network and distributed power supply, and can meet the needs of practical engineering.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM744

【相似文献】