摘要
在能源危机的背景下,海上风电已经成为新能源研究的热点,我国海上风电的发展才刚刚起步。海上风力发电机组接地网结构、所处环境等和陆上风力发电机组均有显著差异,为了研究海上风电机组组的接地问题,利用CDEGS软件建立了利用导管架基础作为海上风电机组组自然接地体的仿真模型。首先将模型的每一个导体进行分段,再通过复镜像法求解每一段导体的格林函数,最后通过叠加定理求解出模型的接地阻抗。此外,还计算比较了海水的水深,海水的电阻率和海床的电阻率等因素对于接地阻抗大小的影响程度,表明,利用导管架结构作为自然接地体,能够保证海上风力发电机组的接地安全,为海上风电机组组接地设计提供了参考。
As energy issues become increasingly prominent, the offshore wind power is becoming an important topic of the world＇s renewable energy research. There are still a lot of works to do in offshore wind power field in China. The grounding network structure of offshore wind turbines is different from the one on land as it usually uses its＇s structure as natural grounding. Regarding the grounding of offshore wind turbines, a simulation model of the jacket structure as the grounding device is established in this paper. Every conductor of this model is divided into several segments, and the Green＇s function of each segment is solved with complex image method. Finally, the grounding impedance can be obtained on the basis of the principle of superposition. Moreover, this paper also analyzes several factors that affect the performance of this grounding electrode, including the depth of sea water, the resistivity of sea water and the soil resistivity of seabed. The results show that using the jacket structure as a natural grounding electrode is satisfactory for the safe grounding of offshore wind turbines.
出处
《电瓷避雷器》
CAS
北大核心
2015年第6期148-153,共6页
Insulators and Surge Arresters
关键词
海上风机
导管架结构
复镜像法
接地阻抗
offshore wind turbine
jacket structures
complex image method
grounding impedance
