中国电机工程学报2017，Vol.37Issue(23)：7058-7065,8.DOI:10.13334/j.0258-8013.pcsee.161568
考虑土壤火花放电的接地装置暂态特性全时域电网络模型
Full-time Electrical Network Model of the Transient Characteristics of the Grounding Devices Considering Soil Sparkover
鲁海亮 1冯志强 2文习山 1童雪芳 3潘卓洪 1陈文广 1蓝磊1
作者信息
- 1. 武汉大学电气工程学院,湖北省武汉市430072
- 2. 国网湖北省电力公司电力科学研究院,湖北省武汉市430077
- 3. 中国电力科学研究院,湖北省武汉市430074
- 折叠
摘要
Abstract
The impulse resistance of the tower grounding devices is one of the key factors that affect the lightning withstand level of the transmission lines.Therefore,study of the impulse characteristics of grounding devices is important for the lightning protection of transmission lines.The sparkover occurs in the soil around the grounding devices under the lightning current of high-amplitude.It makes the impulse characteristics of grounding devices strikingly different from its power-frequency characteristics.The frequency-domain circuit theory had to ignore a large number of high-frequency components during Fourier transformation process of lightning current and response voltage.In order to solve this problem,the time-domain electrical network model of the transient characteristics of grounding devices considering soil sparkover was established in this paper.In order to solve the problem that the response voltage calculated by the low-order time-domain difference method had local zigzag waveforms,the difference solution of p-order accuracy of the proposed model was derived in time domain.The waveform of the response voltage calculated by the time-domain difference method of (3～5)-order accuracy was smooth.It could improve the precision and reduce the computing time.The large current tests of the tower grounding devices were carried out in Wuhan Ultra-High Voltage Test Base.The accuracy of the proposed simulation method is validated by those experiments.关键词
接地装置/暂态特性/火花放电/电网络模型/时域差分法Key words
grounding device/transient characteristics/sparkover/electrical network model/time-domain difference method分类
信息技术与安全科学引用本文复制引用
鲁海亮,冯志强,文习山,童雪芳,潘卓洪,陈文广,蓝磊..考虑土壤火花放电的接地装置暂态特性全时域电网络模型[J].中国电机工程学报,2017,37(23):7058-7065,8.
