变速恒频风电机组预报-校正变桨控制策略  

A Prediction-correction Based Pitch Control Strategy for Variable-speed Constant-frequency Wind Power Generators

作　　者：钱敏慧[1] 陈宁[1] 孙蔚[1] 朱凌志[1] 陈梅[1] 汪宁渤[2] 

机构地区：[1]中国电力科学研究院(南京),江苏省南京市210003 [2]甘肃省电力公司,甘肃省兰州市730050

出　　处：《电力系统自动化》2013年第20期22-27,共6页Automation of Electric Power Systems

基　　金：国家高技术研究发展计划(863计划)资助项目(2011AA05A104);国家电网公司重大科技项目"包含风电出力预测系统的风电场一体化监控技术研究"和"电网友好型大型风电基地关键技术研究与示范"~~

摘　　要：针对现有变桨控制策略在额定风速附近控制效果不甚理想等问题,提出了一种预报—校正变桨控制策略。该策略对风速序列作移动平均处理,并通过插值方法拟合风速—桨距角曲线获取桨距角预报值,在此基础上辅以比例—积分(PI)调节对控制偏差进行校正。通过仿真对比分析了传统变桨控制策略和新型变桨控制策略的特性,结果表明,新型变桨控制策略能够有效降低随机风速波动对变桨控制的影响,在低风速时实现最大风能捕获,在高风速时有效减少变桨动作频率,改善风电机组运行性能。文中给出了该新型变桨控制策略的现场应用运行曲线,验证了策略的实用性。Since the existing pitch control strategy is not effective around the rated wind speed, an improved one with prediction- correction function is proposed in this paper. In this improved strategy, a moving average method is used to process the wind speed, and then the predicted values of pitch angle are obtained using the curve-fitting method. On this basis, the control error is corrected by a PI controller. The performance of the existing and the proposed pitch control strategies are compared by simulations. The simulation results show that the improved strategy can reduce the fluctuations of random wind effectively, enable the wind turbine capture more wind energy under the rated wind speed, and improve the wind turbine performance above the rated wind speed by reducing pitch frequency. The field test results also verify the improved strategy.

关 键 词：风电机组 变桨控制 预报控制 校正控制 风速预处理 移动平均 数据插值 曲线拟合 

分 类 号：TM315[电气工程—电机]