广东电力
廣東電力
엄동전력
Guangdong Electric Power
2015年
9期
127-130
,共4页
江全才%朱博云%吴金辉%谭坤侨%卢振鹏
江全纔%硃博雲%吳金輝%譚坤僑%盧振鵬
강전재%주박운%오금휘%담곤교%로진붕
输电线路%塔线体系%脉动风速%脱冰跳跃%谐波叠加法
輸電線路%塔線體繫%脈動風速%脫冰跳躍%諧波疊加法
수전선로%탑선체계%맥동풍속%탈빙도약%해파첩가법
power transmission line%tower line system%pulse wind speed%ice shedding%harmonic superposition
鉴于目前同时考虑导线脱冰和脉动风荷载的输电线路脱冰研究成果较少,采用有限元瞬态动力学分析方法,建立了500 kV 实际运行线路的塔线体系有限元模型;使用谐波叠加方法模拟了导线高度处脉动风速时程;通过仿真分析了导线覆冰厚度为10 mm,考虑脉动风速影响下的导线脱冰的动力学响应特性,并分别从导线跳跃高度、导线应力和导线不平衡张力三方面探讨脉动风速对脱冰的影响。结果表明,考虑脉动风速影响时导线跳跃高度、导线应力及不平衡张力相比无风情况下略有减小。
鑒于目前同時攷慮導線脫冰和脈動風荷載的輸電線路脫冰研究成果較少,採用有限元瞬態動力學分析方法,建立瞭500 kV 實際運行線路的塔線體繫有限元模型;使用諧波疊加方法模擬瞭導線高度處脈動風速時程;通過倣真分析瞭導線覆冰厚度為10 mm,攷慮脈動風速影響下的導線脫冰的動力學響應特性,併分彆從導線跳躍高度、導線應力和導線不平衡張力三方麵探討脈動風速對脫冰的影響。結果錶明,攷慮脈動風速影響時導線跳躍高度、導線應力及不平衡張力相比無風情況下略有減小。
감우목전동시고필도선탈빙화맥동풍하재적수전선로탈빙연구성과교소,채용유한원순태동역학분석방법,건립료500 kV 실제운행선로적탑선체계유한원모형;사용해파첩가방법모의료도선고도처맥동풍속시정;통과방진분석료도선복빙후도위10 mm,고필맥동풍속영향하적도선탈빙적동역학향응특성,병분별종도선도약고도、도선응력화도선불평형장력삼방면탐토맥동풍속대탈빙적영향。결과표명,고필맥동풍속영향시도선도약고도、도선응력급불평형장력상비무풍정황하략유감소。
In view of the problem of few research achievements of ice shedding of power transmission lines considering of ice shedding of conductors and pulse wind load at the same time at present,finite element transient dynamics analysis method was used for establishing finite element model for tower line system of 500 kV running lines.Harmonic superposition method was used to simulate pulse wind speed time history.Simulation analysis was carried out for dynamics response characteristic of ice shedding of conductors under conditions of 10 mm icing thickness of conductors and considering of influence of wind speed.In aspects of jumping height of the conductor,stress of the conductor and unbalanced tension,affect on ice shedding by pulse wind speed was discussed.Results indicate that jumping height,stress and unbalanced tension of the conductor is slightly decreased compared with that under the condition of no wind.