考虑多台区互联的中低压交直流混合配电网双层协同优化调度方法  

Bi-level Optimization Scheduling of Mid-Low-Voltage AC/DC Hybrid Distribution Network Considering Interconnection Between Networks

作　　者：刘科研 盛万兴 詹惠瑜 佟博 张璐[2] 唐巍[2] LIU Keyan;SHENG Wanxing;ZHAN Huiyu;TONG Bo;ZHANG Lu;TANG Wei(Power Distribution Technology Center,China Electric Power Research Institute,Beijing 100192,China;College of Information and Electrical Engineering,China Agricultural University,Beijing 100091,China)

机构地区：[1]中国电力科学研究院有限公司配电技术中心,北京市100192 [2]中国农业大学信息与电气工程学院,北京市100091

出　　处：《电力建设》2024年第1期33-44,共12页Electric Power Construction

基　　金：国家电网有限公司总部科技项目“适应新型直流用电的中低压交/直/储混合配电网网架优化和运行协调技术研究”(5400-202112139A-0-0-00)。

摘　　要：高比例可再生能源的大量接入和新型用电设备的增加,使得配电网逐渐向区域化、网格化转型,中低压交互、多台区互联的交直流混合配电网将成为配电网的发展趋势。鉴于此,提出了考虑多台区互联的中低压交直流混合配电网功率双层协同优化调度方法。以综合成本最小为目标建立交直流低压台区功率优化调度模型,得到各个台区内储能充放电策略和电动汽车V2G(vehicle to grid)策略;以系统综合电压偏差最小、综合运行成本最小为目标,建立中压优化模型,得到互联换流器的交换功率。将上下层结果互相传递迭代优化,直至中压配电网和各个低压台区全部收敛。最后,以改进的IEEE 33节点算例系统对所提方法进行了验证,算例结果表明,所提方法能够有效减小系统网络损耗,平抑电压波动。With high penetration renewable energy and a new type of accessed load,traditional distribution networks have been gradually transformed into multiconnected networks.AC/DC hybrid distribution networks with multi-voltage level interaction have become the development trend of distribution networks.Based on this trend,a two-layer optimization method for an AC/DC distribution network is proposed,considering multi-connected and different voltage level interactions.The objective function of the low-voltage network problem is to minimize the schedule cost and achieve dispatching of energy storage and EV.The objective function of the mid-voltage problem is to minimize the schedule cost and voltage deviation.Next,the exchange power of the voltage-source converter is obtained.Two issues are iterated and optimized until they reach convergence.Finally,a case study was conducted based on the IEEE33 system.The results show that the proposed method can minimize power loss and voltage fluctuation.

关 键 词：交直流配电网 多台区互联 中低压协同优化 储能 V2G 双层迭代优化 

分 类 号：TM73[电气工程—电力系统及自动化]