限电弃风工况下双馈风电机组有功及调频控制策略

发布时间：2018-05-28 07:44

本文选题：双馈风电机组 + 限电弃风　；参考：《电工技术学报》2015年15期

【摘要】：双馈风电机组限电弃风运行能够为电网提供备用和频率支撑。为减小限电弃风工况下转速和桨距角频繁动作致使机组产生的机械疲劳,提出一种基于机组运行点转移轨迹优化的有功控制策略,并通过引入下垂控制使其具备了参与电网一次调频的功能。对限电弃风工况下机组在不同运行点处的稳定性进行分析;考虑机组有功平衡及运行点稳定性等约束条件,建立以转速和桨距角综合调整量最小为目标函数的运行点转移轨迹优化模型,并提出优化模型在出现不可行解时的处理机制,以获得可行的最优转移轨迹;建立机组运行轨迹和调频控制器,并对变桨系统和转子侧变频器的传统控制策略进行改进,使机组能够沿最优转移轨迹调整有功和参与调频。仿真结果表明,利用所提控制策略能使机组在准确完成限电弃风任务并为电网提供频率支撑的同时,大大减少机组转速和桨距角的调整量。
[Abstract]:In order to reduce the mechanical fatigue caused by the frequent movements of the speed and the pitch angle of the electric power grid, a kind of active control strategy based on the optimization of the operating point of the unit is proposed. The function of the primary frequency modulation of the net. The stability of the unit at different operating points is analyzed under the condition of the power and abandoning wind. Considering the constraint conditions such as the active balance and the stability of the operating point, the optimization model of the operation point transfer trajectory is set up with the objective function of the minimum comprehensive adjustment of the speed and the pitch angle as the objective function. In order to obtain the feasible optimal transfer trajectory, the operating trajectory of the unit and the FM controller are established, and the traditional control strategy of the variable pitch system and the rotor side inverter is improved so that the unit can adjust the active power and participate in the frequency modulation along the optimal transfer trajectory. The simulation results show that the proposed control strategy can make the unit a unit. In order to accurately complete the power cut off task and provide frequency support for the power grid, the adjustment of the speed and pitch angle of the unit is greatly reduced.
【作者单位】：华北电力大学新能源电力系统国家重点实验室;国网内蒙古东部电力有限公司调度控制中心;
【基金】：中央高校基本科研业务费专项资金(13XS20) 国家电网公司科技项目(SGMD0000DDJS1500096)资助
【分类号】：TM614

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