CAJ | 학술논문

阐述了风力发电机轴电压产生的原因以及危害.结合兆瓦级风力发电机的现场实际安装,设计了相应的试验测量方案,并实测了轴电压和轴电流波形.采用专业软件对实测波形进行分析,通过比较其有效值、峰峰值以及FFT波形,结果显示出在不同接地方式下轴电压和轴电流存在差异;发电机转轴2侧接地电刷均接地时轴电压最小,电刷均不接地时轴电压最大;且轴电流在1 000 Hz和2 000 Hz处有明显的电流分量.在风力发电机运行期间,保证发电机的总体绝缘状况良好和转轴2侧的接地电刷可靠接地,以确保发电机正常可靠运行.
천술료풍력발전궤축전압산생적원인이급위해.결합조와급풍력발전궤적현장실제안장,설계료상응적시험측량방안,병실측료축전압화축전류파형.채용전업연건대실측파형진행분석,통과비교기유효치、봉봉치이급FFT파형,결과현시출재불동접지방식하축전압화축전류존재차이;발전궤전축2측접지전쇄균접지시축전압최소,전쇄균불접지시축전압최대;차축전류재1 000 Hz화2 000 Hz처유명현적전류분량.재풍력발전궤운행기간,보증발전궤적총체절연상황량호화전축2측적접지전쇄가고접지,이학보발전궤정상가고운행.
In this paper,the cause and damage of the shaft voltage in wind generation is expounded firstly. Based on the actual installation of the megawatt wind generating units,the experimental measurement method is accordingly designed,and the waveforms of the shaft voltage and current are acquired. Meanwhile,the measured waveforms,including their virtual value,peak-peak values and FFT transforms are analyzed by using MATLAB. It is found that that the shaft voltage and current have larger difference in the variation of grounding systems,the shaft voltage is the smallest when both brushes are grounded and is the largest when neither brushes are grounded, the shaft current have larger current components at the 1 000 Hz and 2 000 Hz. In a word,ensuring that the overall insulation of the wind generator is in good order and both bushes at the both sides of the rotating shaft are reliably grounded are crucial to the reliable operation of the wind generation system.