【摘要】：微電網(wǎng)的經(jīng)濟調(diào)度是一門重要研究課題,它的目的是在滿足負荷需求的同時實現(xiàn)綜合成本的最優(yōu)化,是微電網(wǎng)的經(jīng)濟效益得以體現(xiàn)的關鍵。交直流混合微電網(wǎng)為直流負荷和直流微源的并網(wǎng)和管理提供了便利的平臺,其優(yōu)化運行研究逐漸成為重要課題。交直流混合微電網(wǎng)具有與傳統(tǒng)交流微電網(wǎng)相比獨特的優(yōu)點,可以提高控制效率、減小線路損耗、提高電能質(zhì)量、給直流負荷的接入提供方便的平臺。傳統(tǒng)交流微電網(wǎng)的運行方式只有并網(wǎng)運行和離網(wǎng)運行兩種,而交直流混合微電網(wǎng)具備更加靈活多樣運行方式,在優(yōu)化運行中需要考慮不同運行方式的影響以及模式之間的切換。針對交直流混合微電網(wǎng)相比于傳統(tǒng)交流微電網(wǎng)更加復雜多樣的運行模式,計及經(jīng)濟成本和環(huán)保成本,以交直流混合微電網(wǎng)綜合運行成本最小為目標函數(shù),計及交流區(qū)和直流區(qū)功率平衡約束等必要約束,建立了優(yōu)化運行模型。所建立的模型因涵蓋了交直流混合微電網(wǎng)在實際應用中的不同運行模式而更具適用性。在此基礎上,建立了在預期模式切換下和非預期模式切換下的綜合優(yōu)化運行模型,保證了交直流混合微電網(wǎng)在模式切換下的效益最優(yōu)。對粒子群算法引入混沌搜索的方法對其進行改進,采用改進后的混沌粒子群算法對所建立模型設計求解流程。仿真結(jié)果表明,交直流混合微電網(wǎng)在不同運行模式下的優(yōu)化運行結(jié)果指標具有較大差異;交直流混合微電網(wǎng)的運行在計及模式切換的情況下,可預期模式切換比不可預期模式切換下優(yōu)化運行指標更優(yōu)。所建立的模型能夠充分在實際運行中考慮不同運行模式的影響,保證了交直流混合微電網(wǎng)運行的經(jīng)濟性,并且更具備適應性。
[Abstract]:The economic dispatch of microgrid is an important research subject. Its purpose is to realize the optimization of comprehensive cost while satisfying the load demand, and it is the key to embody the economic benefits of microgrid. The hybrid AC / DC microgrid provides a convenient platform for the grid connection and management of DC load and DC microsource. Ac / DC hybrid microgrid has unique advantages compared with traditional AC microgrid. It can improve control efficiency, reduce line loss, improve power quality, and provide a convenient platform for DC load access. There are only two operation modes of traditional AC microgrid, grid-connected operation and off-grid operation, while the AC / DC hybrid microgrid has more flexible and diverse operation modes, so it is necessary to consider the influence of different operation modes and the switching between modes in the optimal operation. Compared with the traditional AC / DC microgrid, the AC / DC hybrid microgrid has more complex and diverse operation modes. Considering the economic cost and environmental protection cost, the objective function is to minimize the comprehensive operation cost of the AC / DC hybrid microgrid. Considering the constraints of AC and DC power balance, the optimal operation model is established. The model is more applicable because it covers the different operation modes of AC / DC hybrid microgrid in practical application. On this basis, a comprehensive optimal operation model under expected mode switching and unanticipated mode switching is established, which ensures the optimal benefit of AC / DC hybrid microgrid under mode switching. The particle swarm optimization (PSO) algorithm is improved by introducing chaos searching method, and the improved PSO algorithm is used to design the solution flow of the established model. The simulation results show that the optimal operation results of AC / DC hybrid microgrid are different in different operation modes, and the operation of AC / DC hybrid microgrid is considered in the case of mode switching. Predictable mode switching is better than unanticipated mode switching. The established model can fully consider the influence of different operation modes in actual operation, which ensures the economy of AC / DC hybrid microgrid operation and is more adaptable.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM732

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