主动配电网的优化调度与静态安全分析

发布时间：2018-06-08 04:47

本文选题：主动配电网 + 优化调度运行　；参考：《上海电力学院》2017年硕士论文

【摘要】：环境污染与能源危机问题的加剧,使得绿色环保的可再生能源分布式发电技术迅速崛起。适应分布式电源(DG)的规模化集成、提高配电网对DG的兼容性与消纳能力、促进网络的优化运行是发展主动配电网(ADN)的核心价值。ADN的优化调度运行需要统筹多种可控资源、实现“源-网-荷”的良性互动、妥善处理调度所面临的多种不确定性因素;ADN的静态安全分析应重点把握网络运行的时序特性,综合考虑ADN的孤岛运行和主动管理对系统安全性提高的积极影响。本文针对ADN的优化调度与静态安全分析展开了深入的研究,主要成果如下:(1)提出了一种“源-网-荷”相协调的主动配电网经济调度方法。基于“源-网-荷”的三元协调互动,以DG、储能、灵活网络拓扑、柔性负荷削减与平移为调度的控制手段,计及购电成本、损耗成本、需求侧管理成本,建立了以运行成本最低为目标的ADN日前经济调度模型;应用改进和声搜索算法进行模型的求解;通过算例分析验证了所提调度方法的正确性和有效性。(2)在经济调度研究的基础上,提出了一种考虑越限风险的主动配电网日前优化调度运行方法。在日前调度阶段考虑风光荷的不确定性所导致的运行越限风险,兼顾调度经济性与安全性,建立了运行成本与越限风险最小的多目标日前优化调度模型,计及DG、储能、无功电压设备、灵活网络拓扑等ADN调度手段;用理想点法来处理多目标模型,以改进和声搜索算法为优化问题的求解工具,并基于半不变量法随机潮流实现越限风险指标的计算;应用所提调度方法来求解ADN测试算例的优化调度运行问题,深入剖析了调度方案的越限风险,并通过对比与分析,验证了所提调度方法的合理性与优越性。(3)提出了一种考虑时序特性与孤岛运行的主动配电网静态安全分析方法。计及DG、储能和可平移负荷,建立了适用于ADN静态安全分析的元件时序模型和安全评估指标;考虑故障发生时段和故障期间网络运行状态两方面的时序性,计及ADN的孤岛运行与主动管理,提出了一种针对主动配电网N-1支路故障的静态安全分析方法;在算例中,应用所提评估指标和分析方法,定量评估了不同时段、不同支路和系统总体的安全性,实现了对ADN薄弱时段和薄弱支路的准确定位。
[Abstract]:With the aggravation of environmental pollution and energy crisis, the green renewable energy distributed power generation technology is rising rapidly. To adapt to the large-scale integration of distributed power generation (DG), to improve the compatibility and absorption ability of distribution network to DG and to promote the optimal operation of the network is the core value of the development of active distribution network ADN. The optimal dispatching operation of ADN needs to coordinate a variety of controllable resources. To realize the benign interaction of "source-network-load", the static security analysis of ADN should focus on the timing characteristics of network operation. Considering the positive effect of ADN islanding operation and active management on system security. In this paper, the optimal dispatch and static security analysis of ADN are deeply studied. The main results are as follows: 1) A coordinated method of "source-network-load" for economic dispatch of active distribution network is proposed. Based on the "source-network-load" ternary coordinated interaction, with DG, energy storage, flexible network topology, flexible load reduction and translation as scheduling control means, taking into account the purchase cost, loss cost, demand-side management costs, The ADN pre-day economic scheduling model with the lowest running cost is established, and the improved harmony search algorithm is used to solve the model. The validity and validity of the proposed dispatching method are verified by a numerical example. Based on the research of economic dispatch, a new optimal dispatching method for active distribution network is proposed, which takes into account the risk of overstepping. In the pre-day scheduling stage, considering the operation overrun risk caused by the uncertainty of wind-load, taking into account the economy and security of scheduling, a multi-objective pre-day optimal scheduling model with minimum operating cost and overrun risk is established, which takes DGand energy storage into account. The ADN scheduling methods, such as reactive power and voltage equipment, flexible network topology and so on, are used to deal with the multi-objective model by using the ideal point method, and the improved harmonic search algorithm is used as the solution tool for the optimization problem. Based on the semi-invariant stochastic power flow, the calculation of the risk index is realized, and the proposed scheduling method is applied to solve the optimal scheduling problem of ADN test cases, and the overrun risk of the scheduling scheme is deeply analyzed, and the comparison and analysis are carried out. The rationality and superiority of the proposed dispatching method are verified. (3) A static security analysis method for active distribution network considering timing characteristics and islanding operation is proposed. Considering DG, energy storage and translatable load, the component timing model and safety evaluation index for ADN static security analysis are established, and the time series of network operation state during fault occurrence and failure are considered. Taking into account the islanding operation and active management of ADN, a static safety analysis method for N-1 branch fault of active distribution network is proposed. The security of different branches and systems realizes the accurate location of weak period and weak branch of ADN.
【学位授予单位】：上海电力学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM73

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