考虑可靠性的配电网重构自适应和声算法

发布时间：2018-03-12 06:38

本文选题：配电网重构　切入点：和声搜索算法　出处：《浙江大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着电网体制改革的日益深入和新能源并网的不断加速,自动化、通信、计算机网络等技术在电力系统中得到日益广泛和深入的应用,电力系统自动化、信息化的水平在迅速提高的同时,未来的电网不再是传统的单一电力系统,而是电力、信息、能源综合一体的复杂大系统。配电网直接影响用户,是现代电力系统中的关键一环。随着配电网的发展,配网设备的投运数量大幅增加,同时也产生了更多的潜在薄弱环节。因此,传统配电网的运行控制手段在自动化水平提升的同时将面临更加复杂的随机因素干扰,配电网安全将面临新一轮的考验。网络重构作为配电网运行控制中的一种重要手段,通过开关状态的变化来形成满足优化目标的新网络结构。合理的重构方案,不仅可以降低网损、改善电能质量,还能够提高系统可靠性。本文根据国.内外研究现状,提出了一种用于配电网重构的正反馈自适应和声算法;并且建立了一种考虑可靠性的配电网多目标重构模型用以提高配电网的安全经济运行能力;最后提出了配电网多维度风险评估及协调管控系统,为保证配电网安全运行提供了保障。具体研究内容包括如下:1、结合国内外研究现状,研究了网络重构在配电网运行控制中的重要性,将现有重构方法归纳为解析法、启发式算法和智能算法三类,并逐一介绍;研究了配电网可靠性的国内外现状,并分别介绍了解析法和模拟法在配电网可靠性评估中的应用。2、提出了一种基于正反馈自适应和声算法的配电网重构方法。首先建立了单目标配电网重构模型;然后从提高配电网重构算法局部寻优能力和算法寻优成功率两方面对传统和声算法进行了改进;并且通过IEEE 33节点系统和PGE 69节点系统验证了算法的有效性和对系统规模的适应性。3、提出了兼顾均匀性的多目标配电网重构模型,将可靠性参数引入到仅考虑网损的传统配电网重构模型中。首先分析了不同均匀性下配电网可靠性和配电网有功网损的关系,并提出了评价配电网网架结构均匀性的指标;然后引入了可靠性指标建立了考虑可靠性的多目标配电网重构模型;最后根据提出的改进和声算法求解了该多目标模型,并在IEEE 33节点系统中验证了模型及求解算法的合理性和有效性。4、提出了配电网多维度风险评估及协同管控系统。该系统以考虑可靠性的配电网多目标优化模型为基础,功能模块包含配电网薄弱环节识别模块和综合风险管控模块。系统开发完成后,可以识别配电网薄弱环节,并针对特殊情景给出风险管控措施,该系统的投入使用为电网运行管理人员提供了全方位多维度的风险信息,为保证配电网安全运行提供了保障。
[Abstract]:With the deepening of power network system reform and the acceleration of new energy grid connection, automation, communication, computer network and other technologies have been increasingly widely and deeply applied in power system, power system automation, At the same time, the level of information is rapidly improved, the future power grid is no longer a traditional single power system, but a complex large system of power, information and energy. Distribution network directly affects users. It is a key link in modern power system. With the development of distribution network, the number of distribution network equipment has increased dramatically, and at the same time, there are more potential weak links. The traditional distribution network operation control means will face the more complex random factor interference while the automation level promotion, the distribution network security will face a new round test. Network reconfiguration is an important means in the distribution network operation control. A new network structure can be formed by changing the switching state to meet the objective of optimization. A reasonable reconstruction scheme can not only reduce the network loss, improve the power quality, but also improve the reliability of the system. A positive feedback adaptive harmony algorithm for distribution network reconfiguration is proposed, and a multi-objective reconfiguration model considering reliability is established to improve the security and economic performance of distribution network. Finally, the multi-dimensional risk assessment and coordination control system of distribution network is put forward, which provides the guarantee for the safe operation of distribution network. The specific research contents include the following: 1, combined with the current research situation at home and abroad, The importance of network reconfiguration in distribution network operation control is studied. The existing reconfiguration methods are classified into three categories: analytic method, heuristic algorithm and intelligent algorithm. The application of analytic method and simulation method in reliability evaluation of distribution network is introduced, and a reconfiguration method based on positive feedback adaptive harmony algorithm is proposed. Firstly, a single objective distribution network reconfiguration model is established. Then the traditional harmonic algorithm is improved from two aspects: improving the local optimization ability of the reconfiguration algorithm and improving the success rate of the algorithm. The validity of the algorithm and the adaptability of the algorithm to the system scale are verified by IEEE 33 bus system and PGE 69 bus system, and a uniform multi-objective distribution network reconfiguration model is proposed. The reliability parameters are introduced into the traditional distribution network reconfiguration model which only considers the network loss. Firstly, the relationship between the distribution network reliability and the distribution network active power loss under different uniformity is analyzed, and the index to evaluate the distribution network structure uniformity is proposed. Then the reliability index is introduced to establish the multi-objective reconfiguration model considering reliability, and finally, the multi-objective model is solved according to the proposed improved harmony algorithm. The rationality and validity of the model and the algorithm are verified in the IEEE 33-bus system, and a multi-dimensional risk assessment and cooperative management and control system for distribution network is proposed. The system is based on the multi-objective optimization model of distribution network considering reliability. The function module includes the weak link identification module and the comprehensive risk control module. After the development of the system, the weak link of the distribution network can be identified, and the risk control measures are given according to the special situation. The application of the system provides a comprehensive and multi-dimensional risk information for the grid operation managers, and provides a guarantee for the safe operation of the distribution network.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM711

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