变频器对不同类型电压暂降的耐受特性研究
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摘要
常见电压暂降类型包括三相暂降、两相暂降和单相暂降,不同类型的暂降对变频器的影响程度有较大的不同,需要研究能够代表变频器在不同类型暂降下的耐受特性的统一规范。文中通过机理分析、仿真和试验研究,给出了变频器在不同暂降类型下具有一定代表性的通用耐受曲线包络线。分析了变频器受不同类型暂降的影响机理,并在MATLAB/Simulink环境下搭建仿真模型进行验证;搭建了试验平台,选取国内市场具有代表性的7种品牌、2种功率(7.5 k W和18.5 k W)的8台变频器进行测试,与理论分析和仿真研究进行相互验证,其结论基本一致。通过对试验结果的处理,得到了变频器在额定转矩转速时不同暂降类型下的通用耐受曲线包络线,具有实际应用价值,可为变频器耐受曲线标准的制定提供重要参考。
Common types of voltage sags include three-phase sags,two-phase sags and single-phase sags,which have different degrees of harm to variable-frequency drives( VFDs). Accordingly,it is necessary to study the unified specifications for the tolerance characteristics of VFDs under different types of sags. This paper presented universal tolerance curve envelopes of VFDs under different types of sags by theoretical analysis,simulation and experiments. Firstly,the influence mechanism of different types of sags on VFDs was analyzed,which was verified by simulation module carried out in MATLAB/Simulink later. Then,a test platform was built to test 8 VFDs of 7 representative brands and 2 kinds of power( 7. 5 k W and 18. 5 k W). The results of experiments,theoretical analysis and simulation were verified by each other,and their conclusions are basically consistent. Finally,the universal tolerance curve envelopes of VFDs under different types of sags in the rated torque and speed were obtained by dealing with the results from experiments in some way,which have practical application value and can provide efficient reference for the standard of tolerance curve for VFDs to be formulated.
Common types of voltage sags include three-phase sags,two-phase sags and single-phase sags,which have different degrees of harm to variable-frequency drives( VFDs). Accordingly,it is necessary to study the unified specifications for the tolerance characteristics of VFDs under different types of sags. This paper presented universal tolerance curve envelopes of VFDs under different types of sags by theoretical analysis,simulation and experiments. Firstly,the influence mechanism of different types of sags on VFDs was analyzed,which was verified by simulation module carried out in MATLAB/Simulink later. Then,a test platform was built to test 8 VFDs of 7 representative brands and 2 kinds of power( 7. 5 k W and 18. 5 k W). The results of experiments,theoretical analysis and simulation were verified by each other,and their conclusions are basically consistent. Finally,the universal tolerance curve envelopes of VFDs under different types of sags in the rated torque and speed were obtained by dealing with the results from experiments in some way,which have practical application value and can provide efficient reference for the standard of tolerance curve for VFDs to be formulated.
引文
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[2]周道军.变频器防低电压穿越分析[J].江苏电机工程,2015,34(2):37-40.Zhou Daojun.The analysis of frequency converter prevent low voltage ride through[J].Jiangsu Electrical Engineering,2015,34(2):37-40.
[3]C W G.Voltage Dip Immunity of Equipment and Installations[R].London,2010.
[4]Weldemariam L E,G?rtner H J,Cuk V,Cobben J F G,Kling W L.The performance of sensitive equipment to voltage dips from field measurements[C]//Proceedings of AFRICON 2015.Addis Ababa:IEEE,2015:1-5.
[5]徐永海,兰巧倩,洪旺松.交流接触器对电压暂降敏感度的试验研究[J].电工技术学报,2015,30(21):136-146.Xu Yonghai,Lan Qiaoqian,Hong Wangsong.Experimental research on AC contactor sensitivity during voltage sags[J].Transactions of China Electrotechnical Society,2015,30(21):136-146.
[6]徐永海,陶顺,肖湘宁.电网中电压暂降和短时间中断[M].北京:中国电力出版社,2015.
[7]IEEE std 1346-1998,IEEE recommended practice for evaluating electric power system compatibility with electronic process equipment[S].
[8]DL/T 1648-2016,发电厂及变电站辅机变频器高低电压穿越技术规范[S].
[9]邵文权,王龙,王建波,等.火电厂给煤机变频器电压暂降抗扰力[J].电力建设,2015,36(3):88-93.Shao Wenquan,Wang Long,Wang Jianbo,et al.Voltage sag immunity of coal feeder inverter in power plants[J].Electric Power Construction,2015,36(3):88-93.
[10]吴跨宇,卢岑岑,陈凯,等.低压变频器及其电压支撑装置测试系统研究开发[J].浙江电力,2016,35(2):1-6.Wu Kuayu,Lu Cencen,Chen Kai,et al.Research and development of testing system for low voltage frequency converter and its voltage support device[J].Zhejiang Electric Power,2016,35(2):1-6.
[11]李江龙,王丽,陈文波.基于直流供电技术的电压暂降保护系统研究[J].电源学报,2015,13(5):105-111.Li Jianglong,Wang Li,Chen Wenbo.Research on voltage sag protection based on DC power supply technology[J].Journal of Power Supply,2015,13(5):105-111.
[12]Bollen Math H J.Understanding Power Quality Problems:Voltage Sags and Interruptions[M].Piscataway NJ:IEEE Press,1999.
[13]Djokic S Z,Stockman K,Milanovi J V,Desmet J J M,Belmans R.Sensitivity of AC adjustable speed drives to voltage sags and short interruptions[J].IEEE Transactions on Power Delivery,2005,20(1):494-505.
[14]Weldemariam L E,G rtner H J,Cuk V,Cobben J F G,Kling W L.Experimental investigation on the sensitivity of an industrial process to voltage dips[C]//Proceedings of 2015 IEEE Eindhoven Power Tech.Eindhoven:IEEE,2015:1-6.
[15]IEEE Standard Association.IEEE Trial-Use Recommended Practice for Voltage Sag and Short Interruption Ride-Through Testing for End-Use Electrical Equipment Rated Less than 1000 V Std P1668-2014[S].New York,2014.
[16]孔祥雨.电压暂降特性及其对敏感设备影响评估研究[D].北京:华北电力大学,2014.
[17]王兆安,刘进军.电力电子技术[M].北京:机械工业出版社,2009.