一种基于载荷时序的变桨后备电源能量计算方法  

An Energy Calculation Method of Pitch Backup Power Supply Based on Design Load Cases

作　　者：李高宇 喻勇 李滔 刘哲 刘润睿 LI Gaoyu;YU Yong;LI Tao;LIU Zhe;LIU Runrui(CRRC Zhuzhou Institute Co.,Ltd.,Zhuzhou,Hunan 412001,China)

机构地区：[1]中车株洲电力机车研究所有限公司,湖南株洲412001

出　　处：《控制与信息技术》2025年第1期95-100,共6页CONTROL AND INFORMATION TECHNOLOGY

摘　　要：变桨控制系统是风力发电机组控制策略实现的执行单元,其后备电源能量状态的正确估算是风机安全运行的有效保障。针对目前主流的变桨控制系统后备电源——超级电容,传统的顺桨能量计算方法是直接依据额定转矩与恒定的叶片顺桨速度进行估算,而忽略了不同工况下转矩与变桨速度的动态变化,导致估算结果与实际能耗存在较大偏差。为此,文章以动态载荷时间序列作为关键的设计输入,针对风机变桨控制系统的后备电源配置提出了一种能量分析方法。该方法采用黎曼和算法,基于动态载荷时序进行更精确的能量计算,避免了传统算法因估算偏差导致的能耗过高问题,从而优化了控制系统的能效和可靠性。采用传统方法和基于动态载荷时序方法分别对10MWD230机型后备电源进行能量需求计算,经对比,基于动态载荷时序方法在确保风机持续稳定运行的同时,减少回桨耗能56.57%,相应超级电容模组成本也大大降低。Pitch control systems function to implement the control strategy of wind turbines,and the accurate energy state estimation of their backup power supplies offers an effective guarantee for the safe operation of wind turbines.Ultracapacitors,which are currently the mainstream backup power supplies for pitch control systems,rely on traditional feathering energy calculation methods that are directly based on rated torque and constant blade feathering speed.These methods neglect dynamic changes in torque and pitch speed under various conditions,resulting in large deviations between estimation results and actual energy consumption.This paper proposes an energy analysis method for configuring backup power supplies in pitch control systems of wind turbines,using dynamic design load cases(DLC)as the key design input.The method incorporates Riemann summation for more accurate energy calculations based on the DLCs,which eliminates excessive energy consumption caused by estimation deviations inherent in traditional methods,thereby optimizing the energy efficiency and reliability of the control systems.In the comparison of energy demand calculations for the backup power supply of the 10MWD230 model respectively from the traditional and proposed methods,the latter reduced energy consumption for unfeathering by 56.57% while ensuring the continuous and stable operation of the wind turbines,corresponding to a significant decrease in the costs associated with the ultracapacitor module.

关 键 词：变桨控制系统 后备电源 超级电容 动态载荷 黎曼和 

分 类 号：TM911[电气工程—电力电子与电力传动] TM614