摘要
随着"煤改电"工程的实施,大量的电采暖设备会向配电网中注入谐波电流,并在启动过程中引起电压暂降,直接影响配电网的电能质量。通过物理模型研究和负荷现场实测的方式,针对不同类型的电采暖设备所产生的谐波含量进行了差异化分析。构建了电采暖设备在配电网不同运行场景下的仿真模型,研究了规模化电采暖对配电网谐波含量及电压暂降的影响程度和限制措施。案例分析表明,随着电采暖设备负荷渗透率的增加,配电网中的谐波含量会有不同程度的提高,电压暂降问题尤其明显,需要采取设备改进和运行控制等方式缓解电采暖设备对电能质量的影响。
With the advance of the coal-to-electricity project,the harmonic current is injected into distribution networks from a large number of electric heating radiators,and the voltage sag is simultaneously occurred during start-up process,which has an immediate impact on the power quality of the distribution networks. On the basis of physical model analysis and practical load data,the differential analysis is carried out for the harmonic contents of different types of electric heating radiators. The simulation model of the radiators is constructed under different operation conditions. The influence degrees of harmonic contents and voltage sag resulted from the radiators are then analyzed and the corresponding measures are determined. Case study shows that the harmonic contents and the voltage sag in the low voltage distribution networks increase in varying degrees with adding the permeability of the radiators. Therefore,there is a need to adopt corresponding measures including equipment improvement and operation optimization to restrain these power quality problems.
引文
[1]韩华春,李强,柳丹.计及电池老化的电动汽车储能频率响应控制[J].电测与仪表,2017,54(15):69-74.Han Huachun,Li Qiang,Liu Dan.Energy storage frequency response control considering battery aging of electric vehicle[J].2017,54(15):69-74.
[2]国家电网公司.国家电网公司农村电力发展“十三五”规划[R].北京:国家电网公司,2014.
[3]张碧涵,尹忠东,赵海森.低压直流供电系统的电能质量综合评估[J].电力建设,2016,37(5):125-131.Zhang Bihan,Yin Zhongdong,Zhao Haisen.Power Quality Comprehensive Evaluation for Low-Voltage DC Power Distribution System[J].E-lectric Power Construction,2016,37(5):125-131.
[4]刘海波,胡滨,王旭阳,等.关于“十三五”配电网发展的思考[J].中国电力,2015,48(1):21-24.Liu Haibo,Hu Bin,Wang Xuyang,et al.Research on the Considerations of Distribution Network Development for the 13th Five-Year Period[J].Electric Power,2015,48(1):21-24.
[5]高泽,陈登明,杨建华,等.计及“煤改电”的农村低压配电网规划研究[J].电工电气,2015,(2):24-29.Gao Ze,Chen Dengming,Yang Jianhua,et al.Study on Rural LowVoltage Distribution Network Planning with Coal-to-Electricity Project[J].Electrotechnics Electric,2015,(2):24-29.
[6]李道平,曲本连,朱风雷,等.低温热泵机组在“煤改电”应用中的评价要求分析和改进[J].制冷与空调,2017,(3):81-88.Li Daoping,Qu Benlian,Zhu Fenglei,et al.Low temperature heat pump units in the evaluation of‘Coal To electricity’application requirements analysis and improvement[J].Refrigeration and Air-condition,2017,(3):81-88.
[7]王文成,唐云峰,武雨,等.计及谐波影响的电采暖控制器控制方法研究及实现[J].电气时代,2015,(4):46-48.Wang Wencheng,Tang Yunfeng,Wu Yu,et al.Research on the Controller of Electric Heating Radiator Considering the Hormonic[J].Electric Age,2015(4):46-48.
[8]JG/T 236-2008,电采暖散热器[S].
[9]George J W.Power System Harmonics[M].Beijing:China Machine Press,2003:130-139.
[10]肖湘宁.电能质量分析与控制[M].北京:中国电力出版社,2010:162-175.
[11]GB/T 14549-93,电能质量公用电网谐波[S].
[12]GB/T 30137-2013,电能质量电压暂降与短时中断[S].
[13]Dinesh K,Firuz Z.Harmonic Analysis of Grid Connected Power Electronic Systems in Low Voltage Distribution Networks[J].IEEE Journal of E-merging and Selected Topics in Power Electronics,2016,4(1):70-79.
[14]Zhi H M,Guang Z Y,Zheng X.Harmonie evaluation of grid with multiple harmonic sources based on DIg SILENT[C]//2014 International Conference on Power System Technology(POWERCON 2014).Chengdu,SC:IEEE,2014:2332-22337.
[15]B.Hartmann,Sz.Liptak.Development of steady state and dynamic energy storage models for DIg SILENT Power Factory[C]//Proc.of 2015IEEE Eindhoven Power Tech,2015:1-6.
