电能质量在线监测分析系统在昭通电网的应用研究
|
摘要
内昆电气化铁路是昭通供电局最大的用电客户,昭通境内电铁沿线共有牵引变电站六座,总容量为248MVA,是昭通电网的一个特殊用户,其负荷具有非线性、不对称和波动性的特点,它长期向昭通电网注入不平衡谐波,而且难免谐波放大,常造成昭通电网枢纽站220kV昭通变电站、220kV大关变电站的无功补偿装置损坏,保护误动,电能计量的精确性也受到影响,其谐波污染已严重威胁着昭通电网的安全稳定运行,对其他用户的影响也不容忽视。
要有效地对昭通电网的谐波进行治理,首先要对昭通电网的谐波进行有效监测,根据监测所得数据进行系统分析,然后制定切实可行的治理方案,才能达到预期效果。传统的监测仪表数据采集受工作时段限制,不能实时获得反应电能质量各项指标,而谐波发生的时间及方式具有很大的随意性,采用常规监测方法无法准确掌握其真实情况及动态规律,长期以来昭通电网的谐波没有得到有效地监测。其次,传统监测仪表数据分析主要靠人工分析,工作量大,结论也不够客观。
电能质量在线监测系统能实时监测电网运行情况,对数据实时采集,经以太网络传输到中心服务器后,通过专用分析软件对各项指标进行计算分析,并根据国家相关标准进行判断,最后以图表方式对结果进行直观输出,对电能质量各项指标分析起得了良好的效果。总结昭通电网长期运行经验及过去对谐波的人工测试结果,发现220kV电压等级变电站的中、低压侧电能质量存在问题较多,奇次谐波电压、电流超标情况比较普遍,因为中、低压侧母线非线性负荷较多,存在谐波源用户。另外,由于220kV变电站的低压侧一般都安装无功补偿装置电容器组,而电容器容易受到谐波的危害,所以220kV变电站的110kV非线性用户所在线路及35kV低压侧无功补偿回路应设置监测点。根据这一原则,制定了昭通电网电能质量在线监测系统监测点的设置方案,在220kV昭通变电站和220kV大关变电站七回110kV线路出线端及三回35kV无功补偿回路设置了十个监测点。
系统建成后,应用该系统分析了昭通主网2007年上半年电能质量状况,初步证实昭通主网近期电能质量存在的主要问题是谐波、电压波动和闪变,该系统的成功应用为进一步开展谐波治理工作奠定了基础。
The Nei kun electrification railroad is the biggest electricity customer for the Zhao tong supply power bureau,following the railroad line totally has already 6 transformer substations,total capacity is 248 MVA,being a special customer of the Zhao tong electricity net,this burden haven't line,dissymmetry and the characteristics of the motion, it infuses into unbalance harmonic toward the Zhao tong electricity net over a long period of time,and unavoidably the harmonic enlarge and often damages the equip of without achievement in expiation,results in protect a mistake to move,the electric power calculate of the precision also is subjected to influence for the vital 220 kV Zhao tong and 220 kV Da guan transformer substation,the its harmonic pollution has already seriously threatenned safe stability of the Zhao tong electricity net,as to it's the influence of other customer also allows of no to neglect.
To availably carry on manage the harmonic of the Zhao tong electricity net,first carry on a valid monitor,carry on system analysis,then draw up according to the monitor income data practical viable manage a project,then can attain the expectation effect.The traditional monitor appearance data collects to be subjected to work time restriction,can't actually the hour acquire reaction electric power quality various index signs,but the harmonic's time for take place and way have very greatly and at will sex and adopt normal regulations a monitor a method can't be accurate to control its true circumstance and dynamic state regulation,the harmonic of the Zhao tong electricity net is not availably monitored for long time.Secondly,the appearance data of the tradition monitor is analytical main is analyze by artificial,the work have great capacity,the conclusion is also not enough objective.
The power quality online monitoring system is ability solid hour monitor a charged barbed wire net movement circumstance,according to solid hour collect,deliver to the center server through the network,then pass the appropriation analysis software to carry on calculation to various index signs analytical,and according to nation related standard carry on judgment,finally with chart as a result carry on keeping view exportation,this is good effect to electric power quality various index sign analysis.Tally up the Zhao tong electricity net to circulate experience over a long period of time and in the past artificial test result with the harmonic,discover the 220kV electric voltage grade a transformer substation of medium,low side electric power quality existence the problem was more,strange time the harmonic electric voltage and current's being super to mark a circumstance be more widespread,because of medium,low side is not line burden more, exist harmonic source customer.Moreover,because of the low side of the 220kV transformer substation generally installs the invalid of compensate equip capacitor set,but the capacitor set be easily subjected to harmonic bane,so the 220kV and 110kV of the transformer substation not line customer place circuit and the 35kV low side invalid of achievement compensate should be established a monitor.According to this principle, drew up the constitution project of the Zhao tong electricity net power quality online monitor system,in the 220kV Zhao tong and 220kV Da guan transformer substations having seven the 110kV circuit lines carry and 35kV three circuit lines invalid of the achievement compensate established ten monitors to order.
After the system being builted up,and applied that system to analyze Zhao tong electricity net the first half of 2007 power quality,the first step confirms a Zhao tong electricity net the existent key problem of the power quality is harmonic,voltage fluctauation and flicker in the near future,that system of successful application laid the foundation for the further work
要有效地对昭通电网的谐波进行治理,首先要对昭通电网的谐波进行有效监测,根据监测所得数据进行系统分析,然后制定切实可行的治理方案,才能达到预期效果。传统的监测仪表数据采集受工作时段限制,不能实时获得反应电能质量各项指标,而谐波发生的时间及方式具有很大的随意性,采用常规监测方法无法准确掌握其真实情况及动态规律,长期以来昭通电网的谐波没有得到有效地监测。其次,传统监测仪表数据分析主要靠人工分析,工作量大,结论也不够客观。
电能质量在线监测系统能实时监测电网运行情况,对数据实时采集,经以太网络传输到中心服务器后,通过专用分析软件对各项指标进行计算分析,并根据国家相关标准进行判断,最后以图表方式对结果进行直观输出,对电能质量各项指标分析起得了良好的效果。总结昭通电网长期运行经验及过去对谐波的人工测试结果,发现220kV电压等级变电站的中、低压侧电能质量存在问题较多,奇次谐波电压、电流超标情况比较普遍,因为中、低压侧母线非线性负荷较多,存在谐波源用户。另外,由于220kV变电站的低压侧一般都安装无功补偿装置电容器组,而电容器容易受到谐波的危害,所以220kV变电站的110kV非线性用户所在线路及35kV低压侧无功补偿回路应设置监测点。根据这一原则,制定了昭通电网电能质量在线监测系统监测点的设置方案,在220kV昭通变电站和220kV大关变电站七回110kV线路出线端及三回35kV无功补偿回路设置了十个监测点。
系统建成后,应用该系统分析了昭通主网2007年上半年电能质量状况,初步证实昭通主网近期电能质量存在的主要问题是谐波、电压波动和闪变,该系统的成功应用为进一步开展谐波治理工作奠定了基础。
The Nei kun electrification railroad is the biggest electricity customer for the Zhao tong supply power bureau,following the railroad line totally has already 6 transformer substations,total capacity is 248 MVA,being a special customer of the Zhao tong electricity net,this burden haven't line,dissymmetry and the characteristics of the motion, it infuses into unbalance harmonic toward the Zhao tong electricity net over a long period of time,and unavoidably the harmonic enlarge and often damages the equip of without achievement in expiation,results in protect a mistake to move,the electric power calculate of the precision also is subjected to influence for the vital 220 kV Zhao tong and 220 kV Da guan transformer substation,the its harmonic pollution has already seriously threatenned safe stability of the Zhao tong electricity net,as to it's the influence of other customer also allows of no to neglect.
To availably carry on manage the harmonic of the Zhao tong electricity net,first carry on a valid monitor,carry on system analysis,then draw up according to the monitor income data practical viable manage a project,then can attain the expectation effect.The traditional monitor appearance data collects to be subjected to work time restriction,can't actually the hour acquire reaction electric power quality various index signs,but the harmonic's time for take place and way have very greatly and at will sex and adopt normal regulations a monitor a method can't be accurate to control its true circumstance and dynamic state regulation,the harmonic of the Zhao tong electricity net is not availably monitored for long time.Secondly,the appearance data of the tradition monitor is analytical main is analyze by artificial,the work have great capacity,the conclusion is also not enough objective.
The power quality online monitoring system is ability solid hour monitor a charged barbed wire net movement circumstance,according to solid hour collect,deliver to the center server through the network,then pass the appropriation analysis software to carry on calculation to various index signs analytical,and according to nation related standard carry on judgment,finally with chart as a result carry on keeping view exportation,this is good effect to electric power quality various index sign analysis.Tally up the Zhao tong electricity net to circulate experience over a long period of time and in the past artificial test result with the harmonic,discover the 220kV electric voltage grade a transformer substation of medium,low side electric power quality existence the problem was more,strange time the harmonic electric voltage and current's being super to mark a circumstance be more widespread,because of medium,low side is not line burden more, exist harmonic source customer.Moreover,because of the low side of the 220kV transformer substation generally installs the invalid of compensate equip capacitor set,but the capacitor set be easily subjected to harmonic bane,so the 220kV and 110kV of the transformer substation not line customer place circuit and the 35kV low side invalid of achievement compensate should be established a monitor.According to this principle, drew up the constitution project of the Zhao tong electricity net power quality online monitor system,in the 220kV Zhao tong and 220kV Da guan transformer substations having seven the 110kV circuit lines carry and 35kV three circuit lines invalid of the achievement compensate established ten monitors to order.
After the system being builted up,and applied that system to analyze Zhao tong electricity net the first half of 2007 power quality,the first step confirms a Zhao tong electricity net the existent key problem of the power quality is harmonic,voltage fluctauation and flicker in the near future,that system of successful application laid the foundation for the further work
引文
[1]邱关源.电路(上册).北京:高等教育出版社,1989
[2]邱关源.电路(下册).北京:高等教育出版社,1989
[3]于永源.电力系统分析.北京:中国电力出版社,2004
[4]程浩忠,吴浩.电力系统无功与电压稳定性.北京:中国电力出版社,2004
[5]程浩忠.电力系统谐波技术.上海:上海交通大学出版社,1998
[6]马维新,电力系统电压。
[7]王兆安,杨君,刘进军,王跃.谐波抑制和无功功率补偿.北京:机械工业出版社,2005
[8]吴竟昌,孙树勤,宋文南.电力系统谐波.北京:水利水电出版社,1998
[9]王兆安,李民,卓放.基于瞬时无功功率理论的高次谐波和无功功率检测.电力电子技术,1992(2)
[10]陆延信.供电系统中的谐波分析测量与抑制.北京:机械工业出版社,1992
[11]杨君,王兆安,邱关源.一种单相电路谐波及无功电流检测新方法.电工技术学报,1996(3)
[12]杨君,王兆安.三相电路谐波电流两种检测方法的对比研究.电工技术学报,1995 2:43-48
[13]刘晨晖.电力系统无功功率分布与电压调节.武汉:中国地质大学出版社,1993
[14]李坚.商业化电网经济运行及无功电压调整.北京:中国电力出版社,2001
[15]程浩忠,廖培鸿.电网谐波抑制与无功补偿的综合措施.电世界.Vol.33No.9.1992
[16]吴竟昌,孙树勤,宋文南等.电力系统谐波.北京:水利电力出版社,1998
[17]刘进军,王兆安,卓放.电容滤波型整流电路网侧谐波分析.电力电子技术,1995(4):14-19
[18]陆廷信.供电系统中的谐波分析测量与抑制.北京:机械工业出版社,1990
[19]黄俊,王兆安.电流电子变流技术.北京:机械工业出版社,1994
[20]周泽存,沈其工,方瑜,王大忠.高电压技术.北京:中国电力出版社,2004
[21]刘然,包兰宇,景志华.电力专业英语.北京:中国电力出版社,2004
[22]吴际舜.电力系统静态安全分析.上海交通大学出版社,1985
[23]程浩忠.电力系统静态最接近电压稳定极限的确定.电网技术,1997,21(8)
[24]刘进军,王兆安.LC滤波的单相桥式整流电路网恻谐波分析.电力电子技术,1996(2):5-9
[25]段勇,王跃,符志平,杨君,王兆安.新型单相并联混合电力滤波器的研究.电工电能新技术,2004,23(1)
[26]王跃.并联混合型有源电力滤波器及其应用研究.西安交通大学博士论文,2003
[27]国家电网公司发输电运营部.电力工业技术监督标准汇编(电能质量监督).北京:中国电力出版社,2003
[28]徐杰,俞扬波.曲靖电网110千伏电气化铁路用电谐波危害分析.云南电力技术,2007,1006-7345(2007)05-0018-02
[29]S.Arabi,H.Hamadanizadeh,B.B.Fardanesh.Convertible Static Compensator Performance Studies on the NY State Transmission System.IEEE Trans.on Power System,2002,17(3):701-706
[29]Mansoor A,Grady W M,Chowdhury A H et al.An investigation of harmonics attenuation and diversity among distributed single-phase power electionic loads.IEEE Trans Power Delivery,1995,10(1):467-473
[30]R.Grunbaum,T.Gustafsson,J.P.Hasler,T.Larsson,M.Lahtinen.STATCOM,a prerequisite for a melt shop expansion-performance experiences.Proceedings of 2003 IEEE Power Tech Conference,Bologna,2003,2:23-26
[31]Zargari N R,Joos G.Performance investigation of a current-controlled voltage regultted PWM rectifier in rotation and stationary frames.IEEE Trans Industrial Electonic,1995,42(4):396-401
[32]Yue Wang,Zhaoan Wang,Jun Yang,Jinjun Liu.A New Hybird Parallel Active Filter.IEEE PESC2003 34th Power Electronics Specialists Conference,Acapulco,Mexico June,2003.15-19
[33]Bhattacharya S,Divan D.Design and implementation of a hybrid series active filter system.Proceedings of PESC'95.1995,189-195
[2]邱关源.电路(下册).北京:高等教育出版社,1989
[3]于永源.电力系统分析.北京:中国电力出版社,2004
[4]程浩忠,吴浩.电力系统无功与电压稳定性.北京:中国电力出版社,2004
[5]程浩忠.电力系统谐波技术.上海:上海交通大学出版社,1998
[6]马维新,电力系统电压。
[7]王兆安,杨君,刘进军,王跃.谐波抑制和无功功率补偿.北京:机械工业出版社,2005
[8]吴竟昌,孙树勤,宋文南.电力系统谐波.北京:水利水电出版社,1998
[9]王兆安,李民,卓放.基于瞬时无功功率理论的高次谐波和无功功率检测.电力电子技术,1992(2)
[10]陆延信.供电系统中的谐波分析测量与抑制.北京:机械工业出版社,1992
[11]杨君,王兆安,邱关源.一种单相电路谐波及无功电流检测新方法.电工技术学报,1996(3)
[12]杨君,王兆安.三相电路谐波电流两种检测方法的对比研究.电工技术学报,1995 2:43-48
[13]刘晨晖.电力系统无功功率分布与电压调节.武汉:中国地质大学出版社,1993
[14]李坚.商业化电网经济运行及无功电压调整.北京:中国电力出版社,2001
[15]程浩忠,廖培鸿.电网谐波抑制与无功补偿的综合措施.电世界.Vol.33No.9.1992
[16]吴竟昌,孙树勤,宋文南等.电力系统谐波.北京:水利电力出版社,1998
[17]刘进军,王兆安,卓放.电容滤波型整流电路网侧谐波分析.电力电子技术,1995(4):14-19
[18]陆廷信.供电系统中的谐波分析测量与抑制.北京:机械工业出版社,1990
[19]黄俊,王兆安.电流电子变流技术.北京:机械工业出版社,1994
[20]周泽存,沈其工,方瑜,王大忠.高电压技术.北京:中国电力出版社,2004
[21]刘然,包兰宇,景志华.电力专业英语.北京:中国电力出版社,2004
[22]吴际舜.电力系统静态安全分析.上海交通大学出版社,1985
[23]程浩忠.电力系统静态最接近电压稳定极限的确定.电网技术,1997,21(8)
[24]刘进军,王兆安.LC滤波的单相桥式整流电路网恻谐波分析.电力电子技术,1996(2):5-9
[25]段勇,王跃,符志平,杨君,王兆安.新型单相并联混合电力滤波器的研究.电工电能新技术,2004,23(1)
[26]王跃.并联混合型有源电力滤波器及其应用研究.西安交通大学博士论文,2003
[27]国家电网公司发输电运营部.电力工业技术监督标准汇编(电能质量监督).北京:中国电力出版社,2003
[28]徐杰,俞扬波.曲靖电网110千伏电气化铁路用电谐波危害分析.云南电力技术,2007,1006-7345(2007)05-0018-02
[29]S.Arabi,H.Hamadanizadeh,B.B.Fardanesh.Convertible Static Compensator Performance Studies on the NY State Transmission System.IEEE Trans.on Power System,2002,17(3):701-706
[29]Mansoor A,Grady W M,Chowdhury A H et al.An investigation of harmonics attenuation and diversity among distributed single-phase power electionic loads.IEEE Trans Power Delivery,1995,10(1):467-473
[30]R.Grunbaum,T.Gustafsson,J.P.Hasler,T.Larsson,M.Lahtinen.STATCOM,a prerequisite for a melt shop expansion-performance experiences.Proceedings of 2003 IEEE Power Tech Conference,Bologna,2003,2:23-26
[31]Zargari N R,Joos G.Performance investigation of a current-controlled voltage regultted PWM rectifier in rotation and stationary frames.IEEE Trans Industrial Electonic,1995,42(4):396-401
[32]Yue Wang,Zhaoan Wang,Jun Yang,Jinjun Liu.A New Hybird Parallel Active Filter.IEEE PESC2003 34th Power Electronics Specialists Conference,Acapulco,Mexico June,2003.15-19
[33]Bhattacharya S,Divan D.Design and implementation of a hybrid series active filter system.Proceedings of PESC'95.1995,189-195