配电变压器集成式混合补偿系统
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摘要
配电变压器作为配电网高低电压等级交汇点,是电能质量控制的关键节点。针对配电网中广泛应用的Dyn连接组配电变压器,文中提出了一种配电变压器集成式混合补偿系统。有源滤波器(APF)和晶闸管可控电抗器(TCR)以及无源滤波支路通过连接抽头接入配电变压器高压侧三角形绕组。采用TCR实现对无功功率的动态补偿,无源滤波支路设计为容性,扩大TCR补偿无功功率范围的同时,滤除TCR以及负载产生的部分谐波电流,进一步减小APF的容量,APF则用来提升无功补偿动态响应速度以及补偿负载和TCR所产生的谐波电流。仿真验证了所提方案的有效性。
As an intersection of high and low-voltage levels in the distribution network, the distribution transformer is the key point of power quality control. This paper proposes an integrated hybrid compensation system for the distribution transformer with Dyn connection which is widely used in distribution networks. The active power filter(APF), the thyristor controlled reactor(TCR) and the passive filter branch access to the delta winding via connecting taps. TCR is used to dynamicly achieve reactive power compensation and the passive filter branch is designed to be capacitive. The compensation range of TCR is extended. While partial harmonic current generated by the load and TCR can be filtered out. Then, the capacity of APF can be further reduced. APF is used to increase the dynamic response speed of reactive power compensation and compensate the harmonic current generated by load and TCR. The simulation results verify the effectiveness of the proposed scheme.
As an intersection of high and low-voltage levels in the distribution network, the distribution transformer is the key point of power quality control. This paper proposes an integrated hybrid compensation system for the distribution transformer with Dyn connection which is widely used in distribution networks. The active power filter(APF), the thyristor controlled reactor(TCR) and the passive filter branch access to the delta winding via connecting taps. TCR is used to dynamicly achieve reactive power compensation and the passive filter branch is designed to be capacitive. The compensation range of TCR is extended. While partial harmonic current generated by the load and TCR can be filtered out. Then, the capacity of APF can be further reduced. APF is used to increase the dynamic response speed of reactive power compensation and compensate the harmonic current generated by load and TCR. The simulation results verify the effectiveness of the proposed scheme.
引文
[1] 易伟浪,何志兴,罗安,等.角形级联型STATCOM不平衡工况下的无功功率控制策略[J].电力系统自动化,2017,41(20):55-62.DOI:10.7500/AEPS20170409002.YI Weilang,HE Zhixing,LUO An,et al.Reactive power control strategy for delta-connected STATCOM under unbalanced condition[J].Automation of Electric Power Systems,2017,41(20):55-62.DOI:10.7500/AEPS 20170409002.
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[3] KULKARNI D B,UDUPI G R.ANN-based SVC switching at distribution level for minimal-injected harmonics[J].IEEE Transactions on Power Delivery,2010,25(3):1978-1985.
[4] HAMAD M S,MASOUD M I,WILLIAMS B W.Medium-voltage 12-pulse converter:output voltage harmonic compensation using a series APF[J].IEEE Transactions on Industrial Electronics,2014,61(1):43-52.
[5] HAN Y,XU L,KHAN M M,et al.Robust deadbeat control scheme for a hybrid APF with resetting filter and ADALINE-based harmonic estimation algorithm[J].IEEE Transactions on Industrial Electronics,2011,58(9):3893-3904.
[6] 马茜,罗培,戴瑜兴.V/v牵引供电所混合式电能质量控制系统非对称补偿设计[J].电工技术学报,2017,32(4):221-230.MA Qian,LUO Pei,DAI Yuxing.Asymmetric compensation design of hybrid power quality manage system for V/v traction substation[J].Transactions of China Electrotechnical Society,2017,32(4):221-230.
[7] WANG L,LAM C S,WONG M C.Hybrid structure of static var compensator and hybrid active power filter (SVC//HAPF) for medium-voltage heavy loads compensation[J].IEEE Transactions on Industrial Electronics,2018,65(6):4432-4442.
[8] 胡斯佳,张志文,李勇,等.一种无辅助变压器的电气化铁道磁势平衡型混合补偿系统[J].中国电机工程学报,2016,36(3):794-803.HU Sijia,ZHANG Zhiwen,LI Yong,et al.A transformerless ampere-balance based hybrid compensating system for electrical railway power systems[J].Proceedings of the CSEE,2016,36(3):794-803.
[9] WANG L,LAM C S,WONG M C.Selective compensation of distortion,unbalanced and reactive power of a thyristor-controlled LC-coupling hybrid active power filter(TCLC-HAPF)[J].IEEE Transactions on Power Electronics,2017,32(12):9065-9077.
[10] DURNA E,YILMAZ ERMI? M.Suppression of time-varying interharmonics produced by medium-frequency induction melting furnaces by a HAPF system[J].IEEE Transactions on Power Electronics,2017,32(2):1030-1043.
[11] LUO A,PENG S,WU C,et al.Power electronic hybrid system for load balancing compensation and frequency-selective harmonic suppression[J].IEEE Transactions on Industrial Electronics,2012,59(2):723-732.
[12] RAHMANI S,HAMADI A,AL-HADDAD K,et al.A combination of shunt hybrid power filter and thyristor-controlled reactor for power quality[J].IEEE Transactions on Industrial Electronics,2014,61(05):2152-2164.
[13] 侯彦方.配电变压器采用Dyn11联结组的优势分析[J].电气应用,2008,27(6):50-52.HOU Yanfang.Analysis on superiority of distribution transformer with Dyn11 wiring[J].Electrotechnical Application,2008,27(6):50-52.
[14] 陈玉,文明浩,尹项根,等.配电变压器集成式级联STATCOM原理与设计[J].电工技术学报,2018,33(12):2861-2872.CHEN Yu,WEN Minghao,YIN Xianggen,et al.Principle and design of the cascaded STATCOM integrated with distribution transformer[J].Transactions of China Electrotechnical Society,2018,33(12):2861-2872.
[15] 王存平,尹项根,熊卿,等.一种改进的ip-iq无功电流检测方法及其应用[J].电力系统保护与控制,2012,40(13):121-126.WANG Cunping,YIN Xianggen,XIONG Qing,et al.An improved ip-iq reactive current detecting method and its application[J].Power System Protection and Control,2012,40(13):121-126.
[16] 熊卿,张哲,尹项根,等.新型配电变压器一体化STATCOM技术研究[J].电工技术学报,2012,27(10):262-269.XIONG Qing,ZHANG Zhe,YIN Xianggen,et al.A novel integration technology of distribution transformer and static var compensation system[J].Transactions of China Electrotechnical Society,2012,27(10):262-269.
[17] 汤赐,罗安.配电网静止同步补偿器的前馈解耦控制策略[J].电力自动化设备,2010,30(6):40-44.TANG Ci,LUO An.Feed-forward decoupling control strategy of DSTATCOM[J].Electric Power Automation Equipment,2010,30(6):40-44.
[18] LASCU C,ASIMINOAEI L,BOLDEA I,et al.High performance current controller for selective harmonic compensation in active power filters[J].IEEE Transactions on Power Electronics,2007,22(5):1826-1835.
[19] LASCU C,ASIMINOAEI L,BOLDEA I,et al.Frequency response analysis of current controllers for selective harmonic compensation in active power filters[J].IEEE Transactions on Industrial Electronics,2009,56(2):337-347.
[20] 李国华,汪玉凤,高小朋.基于PI-VPI控制器的三相四开关APF电流直接控制方法[J].高电压技术,2016,42(1):56-62.LI Guohua,WANG Yufeng,GAO Xiaopeng.Direct current control for three-phase four-switch APF using PI-VPI controller[J].High Voltage Engineering,2016,42(1):56-62.
[2] 姜卫东,皋艳,丁星星,等.提升并联运行并网逆变器效率的功率分配方法[J].电力系统自动化,2017,41(19):120-127.DOI:10.7500/AEPS20160818005.JIANG Weidong,GAO Yan,DING Xingxing,et al.Power allocation method for improving efficiency of grid-connected inverters under parallel operation[J].Automation of Electric Power Systems,2017,41(19):120-127.DOI:10.7500/AEPS20160818005.
[3] KULKARNI D B,UDUPI G R.ANN-based SVC switching at distribution level for minimal-injected harmonics[J].IEEE Transactions on Power Delivery,2010,25(3):1978-1985.
[4] HAMAD M S,MASOUD M I,WILLIAMS B W.Medium-voltage 12-pulse converter:output voltage harmonic compensation using a series APF[J].IEEE Transactions on Industrial Electronics,2014,61(1):43-52.
[5] HAN Y,XU L,KHAN M M,et al.Robust deadbeat control scheme for a hybrid APF with resetting filter and ADALINE-based harmonic estimation algorithm[J].IEEE Transactions on Industrial Electronics,2011,58(9):3893-3904.
[6] 马茜,罗培,戴瑜兴.V/v牵引供电所混合式电能质量控制系统非对称补偿设计[J].电工技术学报,2017,32(4):221-230.MA Qian,LUO Pei,DAI Yuxing.Asymmetric compensation design of hybrid power quality manage system for V/v traction substation[J].Transactions of China Electrotechnical Society,2017,32(4):221-230.
[7] WANG L,LAM C S,WONG M C.Hybrid structure of static var compensator and hybrid active power filter (SVC//HAPF) for medium-voltage heavy loads compensation[J].IEEE Transactions on Industrial Electronics,2018,65(6):4432-4442.
[8] 胡斯佳,张志文,李勇,等.一种无辅助变压器的电气化铁道磁势平衡型混合补偿系统[J].中国电机工程学报,2016,36(3):794-803.HU Sijia,ZHANG Zhiwen,LI Yong,et al.A transformerless ampere-balance based hybrid compensating system for electrical railway power systems[J].Proceedings of the CSEE,2016,36(3):794-803.
[9] WANG L,LAM C S,WONG M C.Selective compensation of distortion,unbalanced and reactive power of a thyristor-controlled LC-coupling hybrid active power filter(TCLC-HAPF)[J].IEEE Transactions on Power Electronics,2017,32(12):9065-9077.
[10] DURNA E,YILMAZ ERMI? M.Suppression of time-varying interharmonics produced by medium-frequency induction melting furnaces by a HAPF system[J].IEEE Transactions on Power Electronics,2017,32(2):1030-1043.
[11] LUO A,PENG S,WU C,et al.Power electronic hybrid system for load balancing compensation and frequency-selective harmonic suppression[J].IEEE Transactions on Industrial Electronics,2012,59(2):723-732.
[12] RAHMANI S,HAMADI A,AL-HADDAD K,et al.A combination of shunt hybrid power filter and thyristor-controlled reactor for power quality[J].IEEE Transactions on Industrial Electronics,2014,61(05):2152-2164.
[13] 侯彦方.配电变压器采用Dyn11联结组的优势分析[J].电气应用,2008,27(6):50-52.HOU Yanfang.Analysis on superiority of distribution transformer with Dyn11 wiring[J].Electrotechnical Application,2008,27(6):50-52.
[14] 陈玉,文明浩,尹项根,等.配电变压器集成式级联STATCOM原理与设计[J].电工技术学报,2018,33(12):2861-2872.CHEN Yu,WEN Minghao,YIN Xianggen,et al.Principle and design of the cascaded STATCOM integrated with distribution transformer[J].Transactions of China Electrotechnical Society,2018,33(12):2861-2872.
[15] 王存平,尹项根,熊卿,等.一种改进的ip-iq无功电流检测方法及其应用[J].电力系统保护与控制,2012,40(13):121-126.WANG Cunping,YIN Xianggen,XIONG Qing,et al.An improved ip-iq reactive current detecting method and its application[J].Power System Protection and Control,2012,40(13):121-126.
[16] 熊卿,张哲,尹项根,等.新型配电变压器一体化STATCOM技术研究[J].电工技术学报,2012,27(10):262-269.XIONG Qing,ZHANG Zhe,YIN Xianggen,et al.A novel integration technology of distribution transformer and static var compensation system[J].Transactions of China Electrotechnical Society,2012,27(10):262-269.
[17] 汤赐,罗安.配电网静止同步补偿器的前馈解耦控制策略[J].电力自动化设备,2010,30(6):40-44.TANG Ci,LUO An.Feed-forward decoupling control strategy of DSTATCOM[J].Electric Power Automation Equipment,2010,30(6):40-44.
[18] LASCU C,ASIMINOAEI L,BOLDEA I,et al.High performance current controller for selective harmonic compensation in active power filters[J].IEEE Transactions on Power Electronics,2007,22(5):1826-1835.
[19] LASCU C,ASIMINOAEI L,BOLDEA I,et al.Frequency response analysis of current controllers for selective harmonic compensation in active power filters[J].IEEE Transactions on Industrial Electronics,2009,56(2):337-347.
[20] 李国华,汪玉凤,高小朋.基于PI-VPI控制器的三相四开关APF电流直接控制方法[J].高电压技术,2016,42(1):56-62.LI Guohua,WANG Yufeng,GAO Xiaopeng.Direct current control for three-phase four-switch APF using PI-VPI controller[J].High Voltage Engineering,2016,42(1):56-62.