考虑电压-无功调节的台区互联装置规划方法  

Planning method of station area interconnection device considering voltage-reactive power regulation

作　　者：王书征[1] 赵洋 李沛林 单婷婷 张金华 WANG Shuzheng;ZHAO Yang;LI Peilin;SHAN Tingting;ZHANG Jinhua(School of Electric Power Engineering,Nanjing Institute of Technology,Nanjing 211167,China)

机构地区：[1]南京工程学院电力工程学院,江苏南京211167

出　　处：《电力工程技术》2024年第3期111-120,共10页Electric Power Engineering Technology

基　　金：国家自然科学基金资助项目(52107098)。

摘　　要：伴随分布式能源广泛接入低压配电网,其对配电网运行灵活性和消纳能力的要求不断提高。利用低压柔性互联装置将独立运行的低压配电台区分区互联,避免传统电压调节和无功补偿装置频繁动作。考虑到柔性互联装置造价昂贵,协同传统电压-无功调节装置,文中提出低压柔性互联装置的选址定容规划方法。首先,分析低压柔性互联装置拓扑和运行方式,建立其潮流模型。其次,建立低压柔性互联装置优化配置的双层规划模型,上层规划以年综合费用最小为目标,下层规划考虑电压-无功协调控制时间序列模型,以运行成本和电压偏差最小为目标,基于粒子群优化算法和混合整数二阶锥规划算法交替求解,得出配电系统最优柔性互联方案和最优运行方式。最后,在IEEE 33节点系统上进行实例分析,验证该双层规划算法的有效性。结果表明,所提方法能有效减少柔性互联装置的过度布置,同时减少由分布式能源频繁波动造成的运行成本。将模型凸化并线性化的方法明显提高了求解效率。With the widespread integration of distributed energy sources into low-voltage distribution networks,the demands for operational flexibility and absorptive capacity of distribution grids have been continuously increasing.The use of low-voltage flexible interconnection devices to interconnect independently operated low-voltage distribution substations helps to avoid frequent operations of traditional voltage regulation and reactive power compensation devices.Considering the high cost of flexible interconnection devices,a method is proposed to plan the siting and capacity of low-voltage flexible interconnection devices in coordination with traditional voltage-reactive power regulation devices.Firstly,the topology and operational mode of the low-voltage flexible interconnection devices are analyzed,and their power flow model is established.Subsequently,a dual-layer planning model is formulated for optimizing the configuration of low-voltage flexible interconnection devices.The upper-layer planning aims to minimize the annual comprehensive cost,while the lower-layer planning takes into account a time-series model for voltage-reactive power coordination control.The objectives of the lower-layer planning are to minimize operation costs and voltage deviations.The optimal solution for the distribution network system′s flexible interconnection scheme and operational mode is obtained through alternating iterations of particle swarm optimization and mixed-integer second-order cone programming algorithms.Finally,a case study is conducted on the IEEE 33-node test system to validate the effectiveness of the proposed dual-layer planning algorithm.The results indicate that the proposed method can effectively reduce the excessive deployment of flexible interconnection devices while simultaneously decreasing the operational costs caused by frequent fluctuations in distributed energy sources.The method of convexifying and linearizing the model significantly enhances the solution efficiency.

关 键 词：分布式能源 低压柔性互联 电压-无功控制 双层规划 选址定容 粒子群优化 混合整数二阶锥规划算法 

分 类 号：TM726[电气工程—电力系统及自动化]