考虑尾流效应的分频海上风电系统有功功率控制策略

Active power control of offshore wind power system integrated via fractional frequency transmission system considering wake effect

为保证分频海上风电系统在每个分配周期内功率指令的准确、可靠响应,该文分析了尾流效应对风电机组有功调节能力和功率指令响应持续性的影响,提出了一种基于有功功率闭环的优化分配策略。在优化过程中引入尾流模型和闭环反馈控制。SimWindFarm仿真结果显示,该文闭环控制方法和传统比例分配方法的结果比较:通过在优化模型中引入尾流模型,能够更准确地计算各台机组的有功调节能力,保证功率指令分配的合理性;设计了基于有功功率闭环的反馈控制器,能够及时地对机组出现的功率跌落做出调整,提高了分频海上风电系统功率指令响应的可靠性;能够更好地适应湍流风速变化场景,保证分频海上风电系统出力满足电网调度需求。

To ensure the accurate and reliable response of power command in each distribution cycle of offshore wind power system integrated via fractional frequency transmission system,the influence of wake effects on the active power regulation capability and power command response continuity of wind turbines is analyzed,and an optimal distribution strategy is proposed based on active power closed-loop.A wake model and a closed-loop feedback in the optimization process control are introduced.The simulation results of SimWindFarm show the comparison between the closed-loop control method and the traditional proportional allocation method:by introducing a wake model into the optimization model,the active power regulation ability of each unit can be more accurately calculated,ensuring the rationality of power instruction allocation;a feedback controller based on active power closed-loop is designed,which can adjust the power drop of the unit in a timely manner,improving the reliability of power command response for offshore wind power system integrated via fractional frequency transmission system;the closed-loop control method can better adapt to turbulent wind speed changes and ensure that the output of the offshore wind power system integrated via fractional frequency transmission system meets the needs of power grid scheduling.