计及电晕和谐波的500kV电力网电能损耗计算
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摘要
电能损耗是电力工业中的一个重要的技术经济指标,随着500kV电网逐渐成为我国的主
力电网,有必要研究500kV电网的运行特点,对电能损耗的计算方法进行改进与创新。本文
针对上述问题,作了以下研究工作:
第一部分介绍了500kV电力网电能损耗计算的基础理论及其特殊性。500kV电网电能损
耗计算以基于潮流的电量法为基础,计算中应当计及长线路的分布参数特性、导线的电晕损
耗和网络谐波损耗。
第二部分研究了500kV电网中计及导线电晕的电能损耗计算方法。本文利用BP型ANN
很强的自适应能力,通过样本数据的学习建立导线电晕损耗计算模型,拟合特征参数与导线
电晕损耗之间的关系。此外,本文修改了普通的潮流模型,提出了计及导线电晕的500kV
电网电能损耗计算方法。
第三部分研究了500kV电网中计及谐波的电能损耗计算方法。本文利用谐波与基波解耦
的潮流算法,提出了计及谐波的500kV电网电能损耗计算方法。
第四部分研究了同时考虑导线电晕损耗及电网谐波影响的500kV电网电能损耗计算方
法。算例表明,在雨天等坏天气下,不计导线电晕对电能损耗造成的计算误差较大,而谐波
对500kg电网电能损耗的影响相对较小。
Energy losses are an important technical and economical index in power systems, with the 500kV systems becoming the main grids in our country, it is necessary to study the operating features of the 500kV grids and improve the calculation of energy losses. Some research works in this respect are studied in this paper as follows:In part one, the base and the peculiarity of calculating energy losses in 500kV network are introduced. In 500kV network, the calculating of energy losses is based on electricity quantities flow, and three aspects ought to be considered, including distribution feature of long line; corona losses of lines; harmonic energy losses.In part two, the method of computing energy losses in 500kV grids considering the corona losses of lines are studied. First, the design of BP network for calculation corona losses of transmission line in 500KV network is introduced. Then a calculation method of energy losses in consideration of corona losses was presented.In part three a decoupled algorithm for power system harmonic flows was introduced; and a computation mode is established for calculating energy losses, including harmonic energy losses.In part four, based on the above researches, a calculation method was proposed with consideration of the losses caused by corona and harmonic in 500KV network. The computed results shows that under bad weather condition (such as rainy days), if neglecting corona losses the errors are greater, while the effectiveness from harmonic is relatively small in 500KV network.
力电网,有必要研究500kV电网的运行特点,对电能损耗的计算方法进行改进与创新。本文
针对上述问题,作了以下研究工作:
第一部分介绍了500kV电力网电能损耗计算的基础理论及其特殊性。500kV电网电能损
耗计算以基于潮流的电量法为基础,计算中应当计及长线路的分布参数特性、导线的电晕损
耗和网络谐波损耗。
第二部分研究了500kV电网中计及导线电晕的电能损耗计算方法。本文利用BP型ANN
很强的自适应能力,通过样本数据的学习建立导线电晕损耗计算模型,拟合特征参数与导线
电晕损耗之间的关系。此外,本文修改了普通的潮流模型,提出了计及导线电晕的500kV
电网电能损耗计算方法。
第三部分研究了500kV电网中计及谐波的电能损耗计算方法。本文利用谐波与基波解耦
的潮流算法,提出了计及谐波的500kV电网电能损耗计算方法。
第四部分研究了同时考虑导线电晕损耗及电网谐波影响的500kV电网电能损耗计算方
法。算例表明,在雨天等坏天气下,不计导线电晕对电能损耗造成的计算误差较大,而谐波
对500kg电网电能损耗的影响相对较小。
Energy losses are an important technical and economical index in power systems, with the 500kV systems becoming the main grids in our country, it is necessary to study the operating features of the 500kV grids and improve the calculation of energy losses. Some research works in this respect are studied in this paper as follows:In part one, the base and the peculiarity of calculating energy losses in 500kV network are introduced. In 500kV network, the calculating of energy losses is based on electricity quantities flow, and three aspects ought to be considered, including distribution feature of long line; corona losses of lines; harmonic energy losses.In part two, the method of computing energy losses in 500kV grids considering the corona losses of lines are studied. First, the design of BP network for calculation corona losses of transmission line in 500KV network is introduced. Then a calculation method of energy losses in consideration of corona losses was presented.In part three a decoupled algorithm for power system harmonic flows was introduced; and a computation mode is established for calculating energy losses, including harmonic energy losses.In part four, based on the above researches, a calculation method was proposed with consideration of the losses caused by corona and harmonic in 500KV network. The computed results shows that under bad weather condition (such as rainy days), if neglecting corona losses the errors are greater, while the effectiveness from harmonic is relatively small in 500KV network.
引文
[1] 郑燕涛.1997年京津唐220kV以上网络网损理论计算.华北电力技术, 1997(12) :8-10
[2] 郑燕涛.1998年京津唐220kV以上网络网损理论计算.华北电力技术, 1998(11) :1-3
[3] 范狄,陈宁等.京津唐电网线损理论计算与分析.华北电力技术,2002 (6) :16-24
[4] 李劲波,陈允平等.计入电晕损耗的潮流模型及计算.电力系统自动化, 1997,21(1) :33-35
[5] 李澍森,陈晓燕.500kV和220kV系统电压谐波水平之间的关系探讨.电 网技术,2002,26(6) :49-52
[6] 李维亚.500kV漫昆线及草铺变谐波测试分析.云南电力技术,1997,25 (1) :69-74
[7] 李健生,肖遥.华中500kV系统谐波测试及其结果分析.中国电力,1994 (1) :45-48
[8] 潘艳,姚国灿.华东电网500kV背景谐波研究.电网技术2000,24(9) : 43-48
[9] 陈星莺、余昆、单渊达.一种适用于具有弱环网和PV节点的配电网的增广 雅可比矩阵潮流法(An Augmented Jacobian Method for Power Flow Analysis of Weakly Looped Distribution Systems with PV Buses). 东南大学学报(英文版), 2002,18(3) :
[10] 国家电力公司.电力网电能损耗计算导则.DL/T686-1999
[11] 国家电力公司.电力网电能损耗管理规定,1990
[12] 国家电网公司.国家电网公司系统2005年度代表日电网负荷实测及线损 理论计算与分析工作大纲,2005
[13] 虞忠年,陈星莺等.电力网电能损耗.中国电力出版社,2000
[14] 杨秀台.电力网线损的理论计算和分析.北京:水利电力出版社,1985
[15] 廖迎晨.配电网络潮流及理论线损计算的研究.河海大学硕士论文,2000 年3月
[16] Ramon Nadira (SM), Felix F. Wu (F) .BULK TRANSMISSION SYSTEM LOSS ANALYSIS. IEEE Transaction on Power Systems. 1993, 8(2) :405-416
[17] 傅志伟.110KV及以上输电系统网损实时精确计算系统的开发.武汉大学 硕士学位论文.2004年4月
[18] 绍军.一种理论线损计算的电量潮流法.大连理工大学硕士学位论文. 2004年3月
[19] 高广淦.交流500-1100kV输电线路电晕损失计算.高电压技术,1985 (1) :35-37
[20] 马仪,李明.高海拔超高压输电线路导线电晕质量控制.云南电业,2004, 12:42-43
[21] Enrique E. Mombello, Giuseppe Ratta. Corona loss characteristics of contaminated conductors in fair weather. Electric Power Systems Research ,2001, 59: 51-59
[22] Mazen Abdel-Salam, Essam Zaki Abdel-Aziz. Improved Calculation for Corona Loss on Three-Phase Power Transmission Lines. IEEE Trans on Power System, 1994, (): 1601-1607
[23] Mazen Abdel-Salam, Essam Zaki Abdel-Aziz. Corona power loss determination on multi-phase power transmission lines. Electric Power Systems Research, 2001, 58: 123-132
[24] K. Adamiak. Adaptive approach to finite element modeling of corona fields. IEEE. Trans on Power System, 1994, 30(4) : 387-393
[25] Zakariya M. Al-Hamouz. A hybrid computational technique for the estimation of corona power loss associated with bundled transmission lines. Electric Power Systems Research. 1999, 50: 65-70
[26] Li Shusen, Chen Xiaoyan, The Study of 500KV System Harmonics in Central China Power Network. 8th International Conference on Harmonics and Quality of Power ICHQP' 98, IEEE/PES and NTUA.Athens,Genrce,October 14-16,1998:814-819
[27] 同向前,余健明等.电网谐波电能损耗的计量方法.西安理工大学学报, 2002. 18(2) :181-184
[28] 吴竞昌.供电系统谐波 北京:中国电力出版社,1998
[29] 宋文南,刘宝仁.电力系统谐波分析.北京:水利电力出版社,1995.
[30] Lo K L, Goh K M. Harmonic Analysis for Power Networks. Electric Power Systems Research. 1986, (10) :189-203.
[31] 程浩忠,廖培鸿等.电力系统谐波潮流的降维计算方法.电力系统自动 化,1996. 20(1) :60-62
[32] Z. A. Marinos, J. L. R. Pereira and S. Carneiro Fast Harmonic Power Flow Calculation Using Parallel Processing. IEE Proc. Gener. Transm. Distrib , 1994. (141) : 27-32
[33] 王曙鸿,王辛芳等.不对称电力系统谐波潮流分析撕裂法和并行计算方法 的应用.西安交通大学学报,1995(6) :7-13
[34] 龙禹,陈珩.同步电机的谐波参数模型和谐波潮流计算.中国电机工程学 报,2000(4) :29-34
[35] J. Clua, L. Sainz and F. Corcoles. Three-phase Transformer Modeling for Unbalanced Harmonic Power Flow Studies, IEEE Transactions on Power Delivery, 2000 (6) : 726-729
[36] 龚世缨,张步涵等.电力系统谐波潮流的一种解耦算法.电网技术, 2003. 27(2) :34-36
[37] 卫志农,鞠平,董峰等.基于潮流计算的电力网线损理论计算.河海大学 学报,2000. 28(6) :43-46
[38] 王冠.电力系统谐波分析的元件模型和系统仿真.浙江大学硕士学位论 文.2003年2月
[39] 刘遵义,李向荣等.电力系统谐波阻抗计算.华中电力,1994,7(2) :5-8
[40] 陈珩.电力系统稳态分析.北京:水利电力出版社.1995
[41] 西安交通大学、清华大学、浙江大学等,电子数字计算机的应用-电力系 统计算.北京:水利电力出版社.1978
[42] 张乃尧,阎平凡等.神经网络与模糊控制.北京:清华大学出版社,1998
[43] 姚向华,刘铭.基于人工神经网络的电力线路损耗计算.电力系统及其自 动化学报,2001. 13(5) :23-25
[44] 潘鑫,陈星莺.一种基于改进级联神经网络的短期负荷预测,江苏电机工 程,2004,23(4) :29-31
[45] 蒋平,施鸣鹤.供电系统谐波潮流的仿真分析.电力系统自动化,2000. (4) :51-54
[46] 崔威,李建华等.供电网络谐波潮流计算.电力自动化设备,2003. 23(2) : 11-14
[47] 唐云龙.基于谐波潮流的公共藕合节点处谐波及阻抗研究.重庆大学硕 士学位论文.2003年4
[48] 黄跃明.电网谐波潮流计算.上海电力学院学报,2000. 16(3) :19-24
[2] 郑燕涛.1998年京津唐220kV以上网络网损理论计算.华北电力技术, 1998(11) :1-3
[3] 范狄,陈宁等.京津唐电网线损理论计算与分析.华北电力技术,2002 (6) :16-24
[4] 李劲波,陈允平等.计入电晕损耗的潮流模型及计算.电力系统自动化, 1997,21(1) :33-35
[5] 李澍森,陈晓燕.500kV和220kV系统电压谐波水平之间的关系探讨.电 网技术,2002,26(6) :49-52
[6] 李维亚.500kV漫昆线及草铺变谐波测试分析.云南电力技术,1997,25 (1) :69-74
[7] 李健生,肖遥.华中500kV系统谐波测试及其结果分析.中国电力,1994 (1) :45-48
[8] 潘艳,姚国灿.华东电网500kV背景谐波研究.电网技术2000,24(9) : 43-48
[9] 陈星莺、余昆、单渊达.一种适用于具有弱环网和PV节点的配电网的增广 雅可比矩阵潮流法(An Augmented Jacobian Method for Power Flow Analysis of Weakly Looped Distribution Systems with PV Buses). 东南大学学报(英文版), 2002,18(3) :
[10] 国家电力公司.电力网电能损耗计算导则.DL/T686-1999
[11] 国家电力公司.电力网电能损耗管理规定,1990
[12] 国家电网公司.国家电网公司系统2005年度代表日电网负荷实测及线损 理论计算与分析工作大纲,2005
[13] 虞忠年,陈星莺等.电力网电能损耗.中国电力出版社,2000
[14] 杨秀台.电力网线损的理论计算和分析.北京:水利电力出版社,1985
[15] 廖迎晨.配电网络潮流及理论线损计算的研究.河海大学硕士论文,2000 年3月
[16] Ramon Nadira (SM), Felix F. Wu (F) .BULK TRANSMISSION SYSTEM LOSS ANALYSIS. IEEE Transaction on Power Systems. 1993, 8(2) :405-416
[17] 傅志伟.110KV及以上输电系统网损实时精确计算系统的开发.武汉大学 硕士学位论文.2004年4月
[18] 绍军.一种理论线损计算的电量潮流法.大连理工大学硕士学位论文. 2004年3月
[19] 高广淦.交流500-1100kV输电线路电晕损失计算.高电压技术,1985 (1) :35-37
[20] 马仪,李明.高海拔超高压输电线路导线电晕质量控制.云南电业,2004, 12:42-43
[21] Enrique E. Mombello, Giuseppe Ratta. Corona loss characteristics of contaminated conductors in fair weather. Electric Power Systems Research ,2001, 59: 51-59
[22] Mazen Abdel-Salam, Essam Zaki Abdel-Aziz. Improved Calculation for Corona Loss on Three-Phase Power Transmission Lines. IEEE Trans on Power System, 1994, (): 1601-1607
[23] Mazen Abdel-Salam, Essam Zaki Abdel-Aziz. Corona power loss determination on multi-phase power transmission lines. Electric Power Systems Research, 2001, 58: 123-132
[24] K. Adamiak. Adaptive approach to finite element modeling of corona fields. IEEE. Trans on Power System, 1994, 30(4) : 387-393
[25] Zakariya M. Al-Hamouz. A hybrid computational technique for the estimation of corona power loss associated with bundled transmission lines. Electric Power Systems Research. 1999, 50: 65-70
[26] Li Shusen, Chen Xiaoyan, The Study of 500KV System Harmonics in Central China Power Network. 8th International Conference on Harmonics and Quality of Power ICHQP' 98, IEEE/PES and NTUA.Athens,Genrce,October 14-16,1998:814-819
[27] 同向前,余健明等.电网谐波电能损耗的计量方法.西安理工大学学报, 2002. 18(2) :181-184
[28] 吴竞昌.供电系统谐波 北京:中国电力出版社,1998
[29] 宋文南,刘宝仁.电力系统谐波分析.北京:水利电力出版社,1995.
[30] Lo K L, Goh K M. Harmonic Analysis for Power Networks. Electric Power Systems Research. 1986, (10) :189-203.
[31] 程浩忠,廖培鸿等.电力系统谐波潮流的降维计算方法.电力系统自动 化,1996. 20(1) :60-62
[32] Z. A. Marinos, J. L. R. Pereira and S. Carneiro Fast Harmonic Power Flow Calculation Using Parallel Processing. IEE Proc. Gener. Transm. Distrib , 1994. (141) : 27-32
[33] 王曙鸿,王辛芳等.不对称电力系统谐波潮流分析撕裂法和并行计算方法 的应用.西安交通大学学报,1995(6) :7-13
[34] 龙禹,陈珩.同步电机的谐波参数模型和谐波潮流计算.中国电机工程学 报,2000(4) :29-34
[35] J. Clua, L. Sainz and F. Corcoles. Three-phase Transformer Modeling for Unbalanced Harmonic Power Flow Studies, IEEE Transactions on Power Delivery, 2000 (6) : 726-729
[36] 龚世缨,张步涵等.电力系统谐波潮流的一种解耦算法.电网技术, 2003. 27(2) :34-36
[37] 卫志农,鞠平,董峰等.基于潮流计算的电力网线损理论计算.河海大学 学报,2000. 28(6) :43-46
[38] 王冠.电力系统谐波分析的元件模型和系统仿真.浙江大学硕士学位论 文.2003年2月
[39] 刘遵义,李向荣等.电力系统谐波阻抗计算.华中电力,1994,7(2) :5-8
[40] 陈珩.电力系统稳态分析.北京:水利电力出版社.1995
[41] 西安交通大学、清华大学、浙江大学等,电子数字计算机的应用-电力系 统计算.北京:水利电力出版社.1978
[42] 张乃尧,阎平凡等.神经网络与模糊控制.北京:清华大学出版社,1998
[43] 姚向华,刘铭.基于人工神经网络的电力线路损耗计算.电力系统及其自 动化学报,2001. 13(5) :23-25
[44] 潘鑫,陈星莺.一种基于改进级联神经网络的短期负荷预测,江苏电机工 程,2004,23(4) :29-31
[45] 蒋平,施鸣鹤.供电系统谐波潮流的仿真分析.电力系统自动化,2000. (4) :51-54
[46] 崔威,李建华等.供电网络谐波潮流计算.电力自动化设备,2003. 23(2) : 11-14
[47] 唐云龙.基于谐波潮流的公共藕合节点处谐波及阻抗研究.重庆大学硕 士学位论文.2003年4
[48] 黄跃明.电网谐波潮流计算.上海电力学院学报,2000. 16(3) :19-24