摘要
针对包含柴油发电机、光伏发电、储能装置以及负荷的独立微网系统,提出孤岛运行模式下微网实时能量管理策略。实时监测储能装置数据,对下一时刻储能装置能量状态进行预测,结合净负荷功率大小采用相应的调度策略。柴油发电机通常关闭作为备用电源,充当电压/频率支撑单元的储能装置不接受功率调度,通过留有一定调节裕量以自动吸纳微网内的剩余功率,非电压/频率支撑单元的储能装置接受功率指令调度参与负荷供电。当储能装置能量状态接近下限时,考虑柴油发电机计划开机时间提前将其开启,保证负荷不间断供电。柴油发电机投入运行后,建立能量优化模型。最后,通过实验验证所提策略的合理性,为孤岛运行模式下微网能量管理的实际工程应用提供指导以及参考。
A real-time energy management strategy is proposed for islanded operation microgrid system consisting of diesel generators, photovoltaic generation, energy storage devices and load. Data of energy storage devices monitored in real time are used to forecast the state of energy for next time. Considering different payload power, corresponding scheduling strategies are used. Diesel generators as backup power is normally closed. The energy storage devices as V-F supported units do not accept the power dispatch, which absorb surplus power in microgrid automatically by leaving a sufficient adjusting margin. The energy storage devices as non-V-F supported units receive power commands to participate in load power supply. Diesel generators will be turned on in advance by considering the planned start time to ensure uninterrupted power supply for load when energy storage devices＇ state of energy approach to the lowest limits. Then energy optimization model is established after diesel generators put into operation. Finally, experiment results indicate the reasonableness of the microgrid dispatch strategy proposed, which provides guidance and reference for the energy management strategy of stand-alone microgrid system applied to the actual projects.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2018年第2期92-100,共9页
Power System Protection and Control
基金
广东省引进创新科研团队计划资助项目(2011N015)
校博士专项科研资助基金(JZ2015HGBZ0487)
台达环境与教育基金会电力电子科教发展计划重大项目(DREM2015002)
关键词
独立微网系统
能量管理策略
计划开机时间
能量优化模型
stand-alone microgrid system
energy management strategy
planned start time
energy optimization model
