考虑复杂预想场景下光伏高效利用的微电网综合规划  

Integrated Planning of Micro-grid for Efficient Utilization of Photovoltaic Generation Considering Complicated Operation Scenarios

作　　者：曾博 欧阳邵杰[2] 张建华 赵天阳 曾鸣[2] 

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京市昌平区102206 [2]华北电力大学经济与管理学院,北京市昌平区102206

出　　处：《中国电机工程学报》2014年第25期4259-4269,共11页Proceedings of the CSEE

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)~~

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。In view of the inadequate consideration of scenario diversity in traditional micro-grid （MG） planning, an integrated MG planning method for efficient photovoltaic （PV） utilization incorporating complicated gcenarios was proposed in this paper. Through quantifying the impact of network contingencies on PV output and its corresponding economic expenses, the security risk coefficient was introduced, and based on which a composite evaluation function for indicating photovoltaic （PV） contribution under normal and contingency scenarios was developed. For the logical discrepancy between different optimization objectives, a bi-level integrated planning model of MG was proposed. It co-optimized the allocation of PV and energy storage together with network reconfiguration to minimize the total economic cost as upper objective and maximize the expected PV generation in the lower level. The model was solved by using a hybrid algorithm, which combined harmony search and probabilistic optimal power flow based on point estimation. The results of the case study demonstrate that by applying the proposed methodology, PV under MG can be used flexibly and efficiently, the overall benefits in actual situations can be improved, and the coordinated schemes that properly satisfy different planning motivations can be achied.

关 键 词：微电网 分布式光伏发电 复杂预想场景 双层规划 综合优化方法 

分 类 号：TM71[电气工程—电力系统及自动化]