CAJ | 학술논문

在充分考虑含光伏电源的城市配电网中负荷与光伏电源之间的日分布特性曲线差异的基础上,提出了一种在配电网故障情况下的光伏电源微电网孤岛动态运行策略.该策略建立了孤岛运行的优化模型,优先保证对少数重要负荷进行供电.通过三次样条插值模拟几类典型行业的日负荷曲线和光伏电源的日输出功率曲线,并采用粒子群优化算法得到各分布式光伏电源在各时段对各行业非重要负荷的最优供电功率,从而实现负荷需求与电源发电之间的动态适配.针对所提出的微电网孤岛运行策略,以美国PG&E69节点配电系统为仿真算例进行了验证.仿真实验的结果表明,该供电策略在配电网发生故障后,可以合理地生成针对负荷需求的最优孤岛供电方案,并充分地利用可再生资源对失电的负荷恢复供电,有效提升了电网的自愈能力.
재충분고필함광복전원적성시배전망중부하여광복전원지간적일분포특성곡선차이적기출상,제출료일충재배전망고장정황하적광복전원미전망고도동태운행책략.해책략건립료고도운행적우화모형,우선보증대소수중요부하진행공전.통과삼차양조삽치모의궤류전형행업적일부하곡선화광복전원적일수출공솔곡선,병채용입자군우화산법득도각분포식광복전원재각시단대각행업비중요부하적최우공전공솔,종이실현부하수구여전원발전지간적동태괄배.침대소제출적미전망고도운행책략,이미국PG&E69절점배전계통위방진산례진행료험증.방진실험적결과표명,해공전책략재배전망발생고장후,가이합리지생성침대부하수구적최우고도공전방안,병충분지이용가재생자원대실전적부하회복공전,유효제승료전망적자유능력.
This paper presents a strategy of dynamic islanding operation of microgird with distributed photovoltaic generators upon distributed network failures based on the recognition that the daily pattern of photovoltaic generators and loads are often not matched. This paper firstly establishes the optimal model of islanding operation on the precondition that a few important loads must be supplied preferentially, and simulates the daily load curve of each typical industry and the daily output curve of photovoltaic generators respectively by spline interpolation, then gets the optimal supply of photovoltaic generators at each time based on particle swarm optimization algorithm, which finally lead to the match between the load demand and the power supply from photovoltaic generators. The suggested strategy is assessed through numerical simulation experiments with the PG&E69-bus system. The outcome shows that the strategy can produce reasonable islanding scheme after faults in distributed network, take full advantage of renewable resources to restore loads and effectively improve the self-healing ability of the gird.