微电网动态经济调度分布式优化方法研究

发布时间：2018-01-11 22:36

本文关键词：微电网动态经济调度分布式优化方法研究　出处：《华南理工大学》2016年硕士论文　论文类型：学位论文

【摘要】：微电网作为分布式发电的有效管理形式,对于推进清洁能源的发展,提高新能源在配电网中的渗透率,提高配电网可靠性和经济性具有重要的意义。但是,微电网中各类电源特性各异,网络通信能力不足,微电网收集各发电单元信息收集能力有限,且各发电单元私有数据需要进行保护,使得传统集中式经济调度优化方法面临挑战。因此,研究微电网动态经济调度分布式优化具有非常重要的理论意义和工程价值。针对孤岛模式下的微电网的分布式动态经济调度问题,综合考虑柴油机的发电成本、新能源发电的弃置费用、储能装置的折旧费用及网络有功损耗,按照各发电单元和储能装置在网络中的接入位置进行分区,以两个区域之间的公共线路作为区域之间的边界条件,从而建立微电网分布式动态经济调度模型。采用同步型交替方向乘子算法进行优化求解,该分布式算法不需要协调中心对全局的拉格朗日乘子进行更新和广播,每次迭代过程中相邻区域之间仅需交换边界节点电压相角信息,且还可以对各分区优化子问题实施并行求解。以某实际微电网为测试系统,验证该算法的正确性和有效性。针对含多微电网的配电网的分布式动态经济调度问题,与孤岛模式不同的是微电网并网后需与配电网交换功率。配电网不但可以从主网购电,也可以从微电网购电,还可以向微电网供电,经济调度周期中还考虑了不同时段的峰、谷、平时段电价。综合考虑微电网内各项费用以及配电网有功损耗和购电费用之和最小,按照各微电网接入配电网的位置以及各微电源接入微电网的位置进行分区,建立含多微电网的配电网分布式动态经济调度模型。对该模型仍然采用同步型交替方向乘子算法进行优化求解,以含两个微电网的配电网作为测试系统,通过与集中式结果的对比显示该算法能稳定收敛到与集中优化相同的最优解。
[Abstract]:As an effective management form of distributed generation, microgrid is of great significance to promote the development of clean energy, improve the permeability of new energy in distribution network, and improve the reliability and economy of distribution network. There are different kinds of power supply characteristics in microgrid, the network communication capacity is insufficient, the ability of collecting information of each generation unit is limited, and the private data of each generation unit needs to be protected. Therefore, the traditional centralized economic scheduling optimization method is faced with challenges. It is of great theoretical significance and engineering value to study the distributed dynamic economic dispatch of microgrid. In view of the distributed dynamic economic dispatch of microgrid in isolated island mode, the generation cost of diesel engine is considered comprehensively. The disposal cost of new energy generation, depreciation cost of energy storage unit and network active power loss are divided according to the access position of each generating unit and energy storage device in the network. The distributed dynamic economic dispatch model of microgrid is established by taking the common line between two regions as the boundary condition between the two regions. The synchronous alternating direction multiplier algorithm is used to optimize the solution. The distributed algorithm does not need the coordination center to update and broadcast the global Lagrange multiplier. In each iteration process, only the voltage phase angle information of the boundary node is exchanged between adjacent regions. It can also be used to solve each sub-problem of sub-optimization in parallel. A practical microgrid is used as the test system. The validity and validity of the algorithm are verified. The distributed dynamic economic dispatch problem of distribution network with multi-microgrid is discussed. Different from the isolated island mode, the microgrid needs to exchange power with the distribution network after being connected to the grid. The distribution network can not only purchase electricity from the main network, but also from the micro-grid, but also can supply power to the micro-grid. In the economic dispatching cycle, the peak, valley, and price in different periods of time are also considered, and the sum of all the expenses in the micro-grid and the sum of the active power loss and the purchase cost of the distribution network are considered comprehensively. According to the location of each microgrid connected to the distribution network and the position of each micro-power source connected to the micro-grid, the division is carried out. The distributed dynamic economic dispatching model of distribution network with multi-microgrid is established, and the synchronous alternating direction multiplier algorithm is used to solve the model. The distribution network with two microgrids is used as the test system. The comparison with the centralized results shows that the proposed algorithm can converge stably to the same optimal solution as the centralized optimization.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM73

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