双馈风电场有功频率分层控制  

Hierarchical control strategy of frequency and reactive power for DFIG wind farm

作　　者：赵斌[1] 李红军[1] 杨超 胡姚刚[3] 

机构地区：[1]国网四川省电力公司技能培训中心,四川成都610072 [2]国网冀北电力有限公司秦皇岛供电公司,河北秦皇岛066000 [3]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《可再生能源》2017年第3期411-418,共8页Renewable Energy Resources

基　　金：中央高校基本科研业务费资助项目(CDJXS11151155);重庆市研究生科研创新项目资助(CYB14014)

摘　　要：风电场有功频率控制是风电场接入电网运行的关键技术。在分析双馈风力发电机组减载运行控制策略及超速法下双馈风力发电机组的减载运行调节能力的基础上,提出了提高双馈风电场的有功调节能力及接入电网后系统频率稳定性的有功频率分层控制策略。该策略根据不同风速区风电机组的减载运行调节能力差异,设计了风电场层分配策略及风电机组层控制策略,在满足有功控制要求的前提下,尽可能提高风电场对电力系统暂态频率稳定的支持。仿真结果表明,该控制策略在系统稳定运行时尽可能存储转子动能,当出现功率扰动后,能够通过快速释放转子存储的动能响应系统频率变化,从而提高了双馈风电场接入电网后的系统频率稳定性。Active power and frequency control is the key technology for grid integration of wind farm. Based on the analysis of DFIG wind turbine control strategy for load shedding operation and the regulation ability through increasing the wind generator rotor speed, this paper presents a hierarchical control strategy for DFIG wind farm to enhance active power stability and improve the power system frequency stability. The wind farm level allocation strategy and wind turbine level control strategy were designed considering the deloading regulation ability of DFIG wind turbine during different wind region. By the hierarchical control strategy,the power system transient frequency stability can improve as much as possible while meeting the active requirements. The simulation results show that the kinetic energy is stored in the rotor as much as possible when the power system is stable, after power disturbances , the kinetic energy stored in the rotor was rapidly released to response frequency variation, thereby increas- ing the system frequency stability.

关 键 词：风电场 双馈风电机组 有功控制 频率控制 减载运行 

分 类 号：TK81[动力工程及工程热物理—流体机械及工程] TM46[电气工程—电器]