A Multi-level Two-stage Optimal Dispatch Model for Wind-storage Hybrid System
作者单位：Electric Power Research Institute of State Grid Shanxi Electric Power Company School of Electrical Engineering Beijing Jiaotong University Department of Electrical Engineering Tsinghua University
会议名称：《第三十九届中国控制会议》
会议日期：2020年
学科分类：080802[工学-电力系统及其自动化] 0808[工学-电气工程] 08[工学] 0807[工学-动力工程及工程热物理]
关 键 词：wind-storage hybrid system ultra-short-term forecast grid-connected power control strategy rolling optimization
摘 要：Energy storage contributes to facilitating wind power penetration as well as compensating grid-connected power fluctuation. Wind farms can improve overall on-grid revenues by taking full advantage of the characteristics of flexibility and rapidity of energy storage. This paper proposes a multi-level and multi-time scale optimal dispatch model for a wind-storage hybrid system. Firstly, the power grid provides the upper and lower on-grid power bounds of wind generation according to constraints of secure and stable power flow operation. Secondly, the wind-storage hybrid system makes power output through a two-stage model. In the day-ahead stage, the generation plan is optimized within the specified range considering short-term wind power forecasting and state of charge（SoC） characteristics of energy storage device. In the intra-day stage, ultra-short-term wind power forecast is introduced to rolling optimize generation schedule in 15-min interval. A modified IEEE 30-bus system is utilized to verify the effectiveness of the model.