电流物理分量理论改进方法及其在电能质量评估中的应用
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摘要
随着现代电力系统的不断发展,电源特性、电网络结构和负荷类型及其构成正在发生着巨大变化,电流引发的电能质量问题越来越突出,而已有方法难以对电流扰动量进行全面评估。为此,该文提出了一种改进的电流物理分量理论,包括工作电流、基波主导无功电流、基波主导负序电流、基波主导零序电流以及谐波电流分量。该方法适用于各种系统条件,并能够全面地针对电流做功效率、不平衡及谐波等物理现象进行量化。在分析电流质量评估关键问题与指标的基础上,研究了改进电流物理分量理论在电力扰动源支路或其集总支路上的电流质量评估中的应用,最后通过对物理实验与工程实测数据的评估验证了所提出方法的可行性与实用性。
With the rapid development of the modern power system, the power supplies, the power network and the loads have taken great changes, and power quality problems caused by current become more and more prominent. The existing method is difficult to evaluate the current disturbance. In this paper, a modified current physical components power theory was proposed, which includes working current, reactive current dominated by fundamental frequency, negative sequence current dominated by fundamental frequency, zero sequence current dominated by fundamental frequency, and harmonic current. The proposed method is applicable to all kind of system characteristic, quantify the phenomena of work-efficiency, unbalance and harmonic. Based on analysis results of key issues and indices for current quality assessment, the application of the proposed method in the current quality assessment was studied. Feasibility and effectiveness were verified by the physical experiment and the assessment of the measured current data from a steel plant with the electric arc furnace load.
With the rapid development of the modern power system, the power supplies, the power network and the loads have taken great changes, and power quality problems caused by current become more and more prominent. The existing method is difficult to evaluate the current disturbance. In this paper, a modified current physical components power theory was proposed, which includes working current, reactive current dominated by fundamental frequency, negative sequence current dominated by fundamental frequency, zero sequence current dominated by fundamental frequency, and harmonic current. The proposed method is applicable to all kind of system characteristic, quantify the phenomena of work-efficiency, unbalance and harmonic. Based on analysis results of key issues and indices for current quality assessment, the application of the proposed method in the current quality assessment was studied. Feasibility and effectiveness were verified by the physical experiment and the assessment of the measured current data from a steel plant with the electric arc furnace load.
引文
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[4]孔祥雨,徐永海,陶顺.基于一种电压暂降新型描述的敏感设备免疫能力评估[J].电工技术学报,2015,30(3):165-171.Kong Xiangyu,Xu Yonghai,Tao Shun.Sensitive equipment immunity assessment based on a new voltage sag description[J].Transactions of China Electrotechnical Society,2015,30(3):165-171.
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[20]肖湘宁,罗超,陶顺.电气系统功率理论的发展与面临的挑战[J].电工技术学报,2013,28(9):1-10.Xiao Xiangning,Luo Chao,Tao Shun.Development and challenges of power theory in electrical power system[J].Transactions of China Electrotechnical Society 2013,28(9):1-10.
[21]Benysek G,Pasko M.功率理论与电能质量治理[M].陶顺,罗超,译.北京:机械工业出版社,2014.
[22]Czarnecki L S.Currents’physical components(CPC)concept:a fundamental of power theory[C]//International School on Nonsinusoidal Currents and Compensation,Lagow,Poland,2008:1-11.
[23]Czarnecki L S,Haley P M.Reactive compensation in three-phase four-wire systems at sinusoidal voltages and currents[C]//2013 International School on Nonsinusoidal Currents and Compensation(ISNCC),Poland,2013:1-6.
[24]Czarnecki L S,Toups T.Working energy-based economic incentives for the supply and loading quality improvement in isolated micro-grids[C]//2012 IEEE15th International Conference on Harmonics and Quality of Power,Hong Kong,China,2012:949-954.
[25]Czarnecki L S,Haley P M.Unbalanced power in fourwire systems and its reactive compensation[J].IEEETransactions on Power Delivery,2015,30(1):53-63.
[26]魏天彩,陶顺,罗超,等.电流物理分量理论的认识与分析[J].电测与仪表,2016,1:8-14.Wei Tiancai,Tao Shun,Luo Chao,et al.Understanding and analysis of currents’physical component theory[J].Electrical Measurement&Instrumentation,2016,1:8-14.
[27]International Electrotechnical Commission.Electromagnetic Compatibility(EMC)-Part 4-30:Testing and measurement techniques.Power quality measurement methods:IEC 61000-4-30[S].Switzerland:Basic EMC Publication,2015.
[2]肖湘宁.新一代电网中多源多变换复杂交直流系统的基础问题[J].电工技术学报,2015,30(15):1-14.Xiao Xiangning.Basic problems of the new complex AC-DC power grid with multiple energy resources and multiple conversions[J].Transactions of China Electrotechnical Society 2015,30(15):1-14.
[3]沈鑫,曹敏.分布式电源并网对于配电网的影响研究[J].电工技术学报,2015,30(增刊1):346-351.Shen Xin,Cao Min.Research on the influence of distributed power grid for distribution network[J].Transactions of China Electrotechnical Society,2015,30(S1):346-351.
[4]孔祥雨,徐永海,陶顺.基于一种电压暂降新型描述的敏感设备免疫能力评估[J].电工技术学报,2015,30(3):165-171.Kong Xiangyu,Xu Yonghai,Tao Shun.Sensitive equipment immunity assessment based on a new voltage sag description[J].Transactions of China Electrotechnical Society,2015,30(3):165-171.
[5]International Electrotechnical Commission.Electromagnetic compatibility(EMC)-part 2-2:environment-compatibility levels for low-frequency conducted disturbances and signaling in public low voltage power supply systems:IEC 61000-2-2[S].Switzerland:Basic EMC Publication,2002.
[6]International Electrotechnical Commission.Electromagnetic compatibility(EMC)-Part 2-12:EnvironmentCompatibility levels for low-frequency conducted disturbances and signaling in public medium voltage power supply systems:IEC 61000-2-12[S].Switzerland:Basic EMC Publication,2003.
[7]European Committee for Electrotechnical Standardization.Voltage characteristics of electricity supplied by public distribution networks:EN 50160:2007[S].Brussels:BSI Publications,2007.
[8]International Electrotechnical Commission.Electromagnetic Compatibility(EMC)-Part 3-3:Limits-limitation of voltage changes,voltage fluctuations and flicker in public low voltage supply systems,for equipment with rated current≤16 A per phase and not subject to conditional connection:IEC 61000-3-3[S].Switzerland:Basic EMC Publication,2013.
[9]International Electrotechnical Commission.Electromagnetic compatibility(EMC)-Part 3-5:Limits-Limitations of voltage fluctuations and flicker in low voltage power supply systems for equipment with rated current>75 A:IEC 61000-3-5[S].Switzerland:Basic EMC Publication,2009.
[10]International Electrotechnical Commission.Electromagnetic compatibility(EMC)-Part 3-11:Limits-Limitation of voltage changes,voltage fluctuations and flicker in public low voltage supply systems,for equipment with rated current≤75 A per phase and subject to conditional connection:IEC 61000-3-11[S].Switzerland:Basic EMC Publication,2000.
[11]International Electrotechnical Commission.Electromagnetic Compatibility(EMC)-Part 4-15:Testing and measurement techniques.Flicker meter,Functional and design specifications:IEC 61000-4-15[S].Switzerland:Basic EMC Publication,2010.
[12]中国人民共和国国家标准.电能质量·供电电压偏差:GB/T 12325[S].北京:中国标准出版社,2008.
[13]中国人民共和国国家标准.电能质量·电压波动和闪变:GB/T 12326[S].北京:中国标准出版社,2008.
[14]中国人民共和国国家标准.电能质量·三相电压不平衡:GB/T 15543[S].北京:中国标准出版社,2008.
[15]中国人民共和国国家标准.电能质量·电力系统频率偏差:GB/T 15945[S].北京:中国标准出版社,2008.
[16]中国人民共和国国家标准.电能质量·公用电网谐波:GB/T 14549[S].北京:中国标准出版社,1993.
[17]中国人民共和国国家标准.电能质量·公用电网间谐波:GB/T 24337[S].北京:中国标准出版社,2008.
[18]International Electrotechnical Commission.Electromagnetic Compatibility(EMC)-Part 3-2:Limits-Limits for harmonic current emissions(equipment input current≤16 A per phase):IEC 61000-3-2[S].Switzerland:Basic EMC Publication,2005.
[19]International Electrotechnical Commission.Electromagnetic Compatibility(EMC)-Part 3-2:Limits-limits for harmonic current emissions(equipment input current>16 A per phase):IEC 61000-3-4[S].Switzerland:Basic EMC Publication,1998.
[20]肖湘宁,罗超,陶顺.电气系统功率理论的发展与面临的挑战[J].电工技术学报,2013,28(9):1-10.Xiao Xiangning,Luo Chao,Tao Shun.Development and challenges of power theory in electrical power system[J].Transactions of China Electrotechnical Society 2013,28(9):1-10.
[21]Benysek G,Pasko M.功率理论与电能质量治理[M].陶顺,罗超,译.北京:机械工业出版社,2014.
[22]Czarnecki L S.Currents’physical components(CPC)concept:a fundamental of power theory[C]//International School on Nonsinusoidal Currents and Compensation,Lagow,Poland,2008:1-11.
[23]Czarnecki L S,Haley P M.Reactive compensation in three-phase four-wire systems at sinusoidal voltages and currents[C]//2013 International School on Nonsinusoidal Currents and Compensation(ISNCC),Poland,2013:1-6.
[24]Czarnecki L S,Toups T.Working energy-based economic incentives for the supply and loading quality improvement in isolated micro-grids[C]//2012 IEEE15th International Conference on Harmonics and Quality of Power,Hong Kong,China,2012:949-954.
[25]Czarnecki L S,Haley P M.Unbalanced power in fourwire systems and its reactive compensation[J].IEEETransactions on Power Delivery,2015,30(1):53-63.
[26]魏天彩,陶顺,罗超,等.电流物理分量理论的认识与分析[J].电测与仪表,2016,1:8-14.Wei Tiancai,Tao Shun,Luo Chao,et al.Understanding and analysis of currents’physical component theory[J].Electrical Measurement&Instrumentation,2016,1:8-14.
[27]International Electrotechnical Commission.Electromagnetic Compatibility(EMC)-Part 4-30:Testing and measurement techniques.Power quality measurement methods:IEC 61000-4-30[S].Switzerland:Basic EMC Publication,2015.