考虑复杂预想场景下光伏高效利用的微电网综合规划

发布时间：2018-03-24 04:11

本文选题：微电网　切入点：分布式光伏发电　出处：《中国电机工程学报》2014年25期

【摘要】：针对传统微电网(micro-grid,MG)规划方法未充分计及实际运行工况多样性的缺点,提出一种考虑复杂预想场景下光伏(photovoltaic,PV)高效利用的MG综合规划方法。通过分析量化实际条件下网络故障对PV的受迫影响及其经济代价,引入安全风险预期系数,建立可综合反映PV在正常及故障预想场景下对MG系统贡献的复合评价函数。鉴于优化目标之间存在的主从逻辑差异,分别以系统投资运行成本最小和全场景下PV效能利用最优作为上、下层目标函数,构建了同时考虑网架重构与PV、储能选址定容的MG双层综合规划模型,并采用和声搜索和基于点估计随机最优潮流相结合的混合算法实现求解。算例分析结果表明,所提方法能够实现MG对分布式PV的灵活高效利用,有效提高实际运行条件下系统的整体预期收益,并可获得满足多样化需求的均衡规划策略。
[Abstract]:In view of the shortcomings of the traditional micro-gridd MGG planning method, which does not fully take into account the diversity of actual operating conditions, A comprehensive MG planning method considering the efficient utilization of photovoltaicus PVs in complex scenarios is proposed. By analyzing the forced impact of network failures on PV and its economic cost under quantized practical conditions, the security risk expectation coefficient is introduced. A composite evaluation function which can reflect the contribution of PV to MG system under normal and fault scenarios is established. Taking the minimum operating cost of the system and the optimal use of PV efficiency in the whole scenario as the upper and lower level objective functions, the MG bilevel comprehensive programming model is constructed, which considers the reconfiguration of the grid structure, the PVV and the fixed capacity of the energy storage site at the same time. The hybrid algorithm based on harmonic search and stochastic optimal power flow based on point estimation is used to solve the problem. The numerical results show that the proposed method can realize the flexible and efficient use of distributed PV by MG. It can effectively improve the overall expected income of the system and obtain a balanced planning strategy to meet the diversified needs.
【作者单位】：新能源电力系统国家重点实验室(华北电力大学);华北电力大学经济与管理学院;
【基金】：国家自然科学基金项目(51277067) 国家科技支撑计划资助项目(2013BAA02B02)~~
【分类号】：TM715

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