摘要
电加热融冰技术作为解决风力机叶片覆冰最为行之有效的方法,有必要对融冰功率的影响因素进行研究分析。为此以小型风力机覆冰叶片为研究对象,建立了叶片电加热融冰数值计算模型,阐述了数值求解过程;进而定义了临界融冰功率和限时融冰功率,并给出了相应的计算过程;通过对旋转叶片进行人工覆冰试验并获得冰型,仿真分析了覆冰程度、环境温度、合成风速、叶片攻角、允许融冰时长等因素对融冰功率的影响。结果表明:限时融冰功率随着允许融冰时长的增加而减小,但认为允许融冰时长4~6min为宜;融冰功率随着覆冰程度的增加而减小;环境温度与融冰功率呈现负线性关系;合成风速与融冰功率呈现正相关;融冰功率随叶片攻角的增加整体呈现先增加后减小的规律,且在0°~4°之间出现最大值;限时融冰功率相较于临界融冰功率高1~2 kW/m^(2)。该文结果可为实际风力机叶片电加热融冰系统的运行与设计提供一定的帮助。
The electrically-heating-ice melting technology is the most effective method to solve the icing of wind turbine blades,and it is necessary to study and analyze the influencing factors of ice melting power.In this paper,the icing blades of small wind turbines are taken as the research object,a numerical calculation model of blade electric heating and ice melting is established,and the numerical solution process is described.Then the critical ice melting power and limited time ice melting power are defined,and the corresponding calculation process is given.Through the artificial icing test of small wind turbine blades under rotating state,the influence of icing degree,ambient temperature,synthetic wind speed,blade attack angle,allowable duration of ice melting and other factors on ice melting power is simulated and analyzed.The results show that the limited time ice melting power decreases with the increase of the allowable ice melting time,however,it is considered that the allowable ice melting time is 4~6 min.The ice melting power decreases with the in-crease of icing degree.There is a negative linear relationship between ambient temperature and ice melting power,while there is a positive correlation between synthetic wind speed and ice melting power.The ice melting power with the in-crease of blade angle of attack overall show the law of first increase and then decrease,and the maximum appears at 0°~4°.The limited time ice melting power is 1~2 kW/m^(2) higher than the critical ice melting power.The results of this paper can provide some supports for the operation and design of the actual wind turbine blade electric heating ice melting system.
作者
王欢
胡琴
邱刚
舒立春
熊俊杰
胡紫园
WANG Huan;HU Qin;QIU Gang;SHU Lichun;XIONG Junjie;HU Ziyuan(Xuefeng Mountain Energy Equipment Safety National Observation and Research Station,Chongqing University,Chongqing 400044,China;Electric Power Research Institute,State Grid Jiangxi Electric Power Co.,Ltd.,Nanchang 330096,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2024年第3期1322-1330,共9页
High Voltage Engineering
基金
国网江西省电力有限公司科技项目(521820220007)。
关键词
叶片覆冰
电加热融冰
数值计算模型
融冰功率
影响因素
blade icing
electric heating ice melting
numerical calculation model
ice melting power
influencing factors
作者简介
王欢,1993-,男,博士生,主要从事复杂环境电气外绝缘及风电场灾害防御方面的研究工作,E-mail:1173394186@qq.com;通信作者:胡琴,1981-,男,博士,教授,博导,主要从事复杂环境电气外绝缘、电网防冰减灾技术方面的研究工作,E-mail:huqin@cqu.edu.cn;邱刚,1990-,男,博士,主要从事电气外绝缘、风电场防冰减灾方面的研究工作,E-mail:jhqiugang@163.com。
