考虑分布式光伏和储能接入的中低压配电网多时间尺度优化调度策略  

Multi-time scale optimal dispatch strategy for medium-voltage and low-voltage distribution networks with distributed PV and BESS access

作　　者：袁天梦 杨一宁 胡泽春[2] YUAN Tianmeng;YANG Yining;HU Zechun(Tangshan Power Supply Company of State Grid Jibei Electric Power Co.,Ltd.,Tangshan 063099,China;Department of Electrical Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]国网冀北电力有限公司唐山供电公司,河北唐山063099 [2]清华大学电机工程与应用电子技术系,北京100084

出　　处：《电力科学与技术学报》2025年第1期101-112,共12页Journal of Electric Power Science And Technology

基　　金：国网冀北电力有限公司科技项目(520103220004)。

摘　　要：近年来,中低压配电网中的光伏装机容量迅速增长,带来了功率流向变化和电压越限等问题。针对含高比例光伏的中低压配电网,提出一种日前-日内两阶段的多时间尺度优化调度方法。首先,以网损、光伏弃用惩罚成本以及储能系统充放电成本最小为目标函数建立集中式的中低压配电网日前随机优化模型,并转化为混合整数二阶锥规划(mixed-integer second-order cone programming,MISOCP)模型进行求解。其次,由于不同设备调节时间尺度不同以及低压配电网的准确网络参数难以获取,在日内阶段构建了中低压配电网双层滚动优化方法:上层集中式优化模型提供中压配电网运行的基准策略,下层分布式控制模型根据电压越限情况顺序调节低压层光伏逆变器无功、储能无功、储能有功以及光伏有功的出力。最后,基于改进的IEEE 33节点中压系统和21节点低压系统验证所提方法的有效性。In recent years,the installed capacity of photovoltaic(PV)in medium-voltage distribution networks(MDNs)and low-voltage distribution networks(LDNs)has increased rapidly,which brings about problems such as power flow direction change and overvoltage.For MDNs and LDNs with a high proportion of PV,a multi-time scale optimal dispatch method involving two stages is proposed:the day-ahead stage and the intra-day stage.Firstly,a centralized day-ahead stochastic optimization model of MDNs and LDNs is established with the objective of minimizing the network loss,the penalty cost of PV abandonment,and the charging and discharging cost of the battery energy storage system(BESS).Then,the model is transformed into a mixed-integer second-order cone programming(MISOCP)problem and solved.Secondly,in view of the different adjustment time scales of different facilities and the difficult acquisition of accurate network parameters of LDNs,a two-layer rolling optimization method for MDNs and LDNs is constructed at the intra-day stage.The upper centralized optimization model provides the benchmark strategy for the operation of MDNs,and the lower distributed control model sequentially adjusts the output of reactive power of PV inverters,reactive power and active power of BESS,and active power of PV in LDNs according to overvoltage degrees.Finally,based on the modified IEEE 33-bus MDN and 21-bus LDN,the effectiveness of the proposed method is verified.

关 键 词：中低压配电网 分布式光伏 储能 集中式优化 分布式控制 

分 类 号：TM732[电气工程—电力系统及自动化]