复杂组合下电弧炉的电压波动与闪变评估方法
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摘要
运行时电弧炉的电弧频繁起断和电极开路短路都会引起供电母线严重的电压波动与闪变。为保证电网优质稳定运行,需要对即将接入电网的电弧炉负荷进行波动闪变预评估。在现有国标的基础上,本文提出一种电弧炉负荷电压波动与闪变评估的实用计算方法,能分析多种类型电弧炉多母线接入所产生电压波动与闪变的复杂情况,同时给出治理方案。通过实际变电站负荷的算例分析,验证了所提方法的可行性。
Frequent arc break and electrode open-short-circuiting of the arc furnace during operation can cause severe voltage fluctuation and flicker in the power supply bus. For the high-quality and stable grid, a pre-evaluation of fluctuation and flicker of the arc furnace connected to the grid is required. Based on the existing national standard, a practical calculation method for the electric arc furnace load voltage fluctuation and flicker evaluation was presented in this paper. The voltage fluctuation and flicker caused by the multi-bar access of various types of arc furnaces and its control suggestions can be known by this method under such complicated situation. The feasibility of the proposed method was verified by an example of arc furnace loads in actual substation.
Frequent arc break and electrode open-short-circuiting of the arc furnace during operation can cause severe voltage fluctuation and flicker in the power supply bus. For the high-quality and stable grid, a pre-evaluation of fluctuation and flicker of the arc furnace connected to the grid is required. Based on the existing national standard, a practical calculation method for the electric arc furnace load voltage fluctuation and flicker evaluation was presented in this paper. The voltage fluctuation and flicker caused by the multi-bar access of various types of arc furnaces and its control suggestions can be known by this method under such complicated situation. The feasibility of the proposed method was verified by an example of arc furnace loads in actual substation.
引文
[1]李玲玲,刘敬杰,凌跃胜,等.物元理论和证据理论相结合的电能质量综合评估[J].电工技术学报,2015,30(12):383-391.
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[8]魏晓璞,徐永海,肖湘宁.电压波动与闪变检测方法综述[J].电测与仪表,2009,46(4):1-5,9.
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[12]郭上华,黄纯,王磊,等.电压波动和闪变的检测与控制方法[J].湖南电力,2003,32(5):8-11.
[13]张定华,桂卫华,王卫安,等.大型电弧炉无功补偿与谐波抑制的综合补偿系统[J].电网技术,2008,32(12):23-29.
[14]胡畔,陈红坤,孙志达,等.一种交流电弧炉通用性模型[J].电工技术学报,2016,31(8):172-180.
[15]廖延涛,胡骏,张海龙,等.用于电能质量预测分析的交流电弧炉时变参数模型[J].电气技术,2016,17(3):41-46.
[16]杨洪耕,肖先勇,刘俊勇.电能质量问题的研究和技术进展(四)--电压波动与闪变的测量分析[J].电力自动化设备,2004,24(1):1-4.
[17]李妍,余欣梅,文劲宇,等.小容量电弧炉所引起的电压波动及抑制措施研究[J].继电器,2003,31(5):59-61.
[2]陈民武,宫衍圣,李群湛,等.电气化铁路电能质量评估及新型控制方案研究[J].电力系统保护与控制,2012,40(16):141-147.
[3]智慧,陈刚.牵引变电所电能质量评估及控制策略[J].电气应用,2011(2):24-27.
[4]付学谦,陈皓勇,刘国特,等.分布式电源电能质量综合评估方法[J].中国电机工程学报,2014,34(25):4270-4276.
[5]颜全椿,顾文,范立新,等.考虑分功率区间的风电场电能质量综合评估方法[J].电气技术,2018,19(2):75-79.
[6]陶顺,肖湘宁.电力系统电能质量评估体系架构[J].电工技术学报,2010,25(4):171-175.
[7]刘俊华,罗隆福,张志文,等.基于模糊集对分析法的电能质量综合评估[J].电网技术,2012,36(7):81-85.
[8]魏晓璞,徐永海,肖湘宁.电压波动与闪变检测方法综述[J].电测与仪表,2009,46(4):1-5,9.
[9]Huang Shyh-Jier,Chen Wen Lu,Alberto J.Enhancement of digital equivalent voltage flicker measurement via continuous wavelet transform[J].IEEE Transactions on Power Delivery,2004,19(2):663-670.
[10]Elnady A,Salama M M.Mitigation of the voltage fluctuations using an efficient disturbance extraction technique[J].Electric Power Systems Research,2007,77(3):266-275.
[11]林海雪.电压波动和闪变标准(第4讲)[J].建筑电气,2011(8):12-16.
[12]郭上华,黄纯,王磊,等.电压波动和闪变的检测与控制方法[J].湖南电力,2003,32(5):8-11.
[13]张定华,桂卫华,王卫安,等.大型电弧炉无功补偿与谐波抑制的综合补偿系统[J].电网技术,2008,32(12):23-29.
[14]胡畔,陈红坤,孙志达,等.一种交流电弧炉通用性模型[J].电工技术学报,2016,31(8):172-180.
[15]廖延涛,胡骏,张海龙,等.用于电能质量预测分析的交流电弧炉时变参数模型[J].电气技术,2016,17(3):41-46.
[16]杨洪耕,肖先勇,刘俊勇.电能质量问题的研究和技术进展(四)--电压波动与闪变的测量分析[J].电力自动化设备,2004,24(1):1-4.
[17]李妍,余欣梅,文劲宇,等.小容量电弧炉所引起的电压波动及抑制措施研究[J].继电器,2003,31(5):59-61.