A two-level hierarchical discrete-device control method for power networks with integrated wind farms

• 作者: Boming ZHANG Fengda XU Hongbin SUN Lin JIA Qinglai GUO
• 来源期刊: 现代电力系统与清洁能源学报(英文)
• 学科: 工学
• 关键词: Automatic voltage CONTROL Model predictive CONTROL On-load TAP CHANGER SHUNT capacitor/reactor TWO-STAGE robust optimization Wind-power integration
• 年，卷（期）: 2019,（1）
• 页码范围: 88-98
• 页数: 11页
• 分类号: TM614

摘要

Power systems depend on discrete devices, such as shunt capacitors/reactors and on-load tap changers, for their long-term reliability.In transmission systems that contain large wind farms, we must take into account the uncertainties in wind power generation when deciding when to operate these devices.In this paper, we describe a method to schedule the operation of these devices over the course of the following day.These schedules are designed to minimize wind-power generation curtailment, bus voltage violations, and dynamic reactive-power deviations,even under the worst possible conditions.Daily voltagecontrol decisions are initiated every 15 min using a dynamic optimization algorithm that predicts the state of the system over the next 4-hour period.For this, forecasts updated in real-time are employed, because they are more precise than forecasts for the day ahead.Day-ahead schedules are calculated using a two-stage robust mixedinteger optimization algorithm.The proposed control strategies were tested on a Chinese power network with wind power sources;the control performance was also validated numerically.