CAJ | 학술논문

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。
침대전통미전망(micro-grid，MG)규화방법미충분계급실제운행공황다양성적결점，제출일충고필복잡예상장경하광복(photovoltaic，PV)고효이용적 MG 종합규화방법。통과분석양화실제조건하망락고장대PV적수박영향급기경제대개，인입안전풍험예기계수，건립가종합반영PV재정상급고장예상장경하대 MG 계통공헌적복합평개함수。감우우화목표지간존재적주종라집차이，분별이계통투자운행성본최소화전장경하PV효능이용최우작위상、하층목표함수，구건료동시고필망가중구여PV、저능선지정용적MG쌍층종합규화모형，병채용화성수색화기우점고계수궤최우조류상결합적혼합산법실현구해。산례분석결과표명，소제방법능구실현MG대분포식PV적령활고효이용，유효제고실제운행조건하계통적정체예기수익，병가획득만족다양화수구적균형규화책략。
ABSTRACT: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 scenarios 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.