静止无功补偿器和发射器在电弧炉动态无功补偿系统中的应用
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摘要
发展高效绿色电炉冶炼技术是淘汰落后产能、钢铁产业调整升级的重要举措。电弧炉作为核心生产设备,防止其生产运行中无功冲击造成的电压跌落至关重要。而目前单一的有源、无源补偿方式无法同时满足电弧炉负荷日益增长的大容量且快速响应的无功补偿需求。研究了静止无功补偿器(SVC)和静止无功发射器(SVG)相结合的混联补偿方式,分析了SVC在分相不平衡大容量补偿及SVG在无功快速响应方面中的特性,并针对某钢厂电弧炉工作运行情况,计算其无功需求,充分利用其原有的SVC装置,设计混联SVG方案来抵消剩余无功缺口,使用PSCAD/EMTDC进行了联合应用仿真,证实其理论有效性。
The development of high-efficiency green electric furnace smelting technology is an important measure to eliminate backward production capacity and upgrade the steel industry.It is essential to prevent voltage drops caused by reactive power shocks in electric arc furnace operations.At present,the single active or passive compensation method cannot meet the need of both the increasing large capacity load and fast response period of reactive power compensation device.The hybrid compensation method combining static var compensation(SVC)and static var generator(SVG)is studied in this paper.The characteristics of SVC in phase-separated unbalanced large-capacity compensation and SVG in fast response of reactive power are analyzed.The reactive power demand of an electric arc furnace is calculated.A hybrid scheme is designed to offset the residual reactive power gap,and PSCAD/EMTDC is applied for joint application simulation to confirm the theoretical validity.
The development of high-efficiency green electric furnace smelting technology is an important measure to eliminate backward production capacity and upgrade the steel industry.It is essential to prevent voltage drops caused by reactive power shocks in electric arc furnace operations.At present,the single active or passive compensation method cannot meet the need of both the increasing large capacity load and fast response period of reactive power compensation device.The hybrid compensation method combining static var compensation(SVC)and static var generator(SVG)is studied in this paper.The characteristics of SVC in phase-separated unbalanced large-capacity compensation and SVG in fast response of reactive power are analyzed.The reactive power demand of an electric arc furnace is calculated.A hybrid scheme is designed to offset the residual reactive power gap,and PSCAD/EMTDC is applied for joint application simulation to confirm the theoretical validity.
引文
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[11]邹宁,方存洋,刘育鑫,等.PSCAD/EMTDC-MATLAB联合仿真技术在SVC控制系统仿真建模中的应用[J].江苏电机工程,2012,31(5):40-44.(Zou Ning,Fang Cunyang,Liu Yuxin,et al.Application of PSCAD/EMTDC-MATLAB co-simulation technology in SVC control system simulation modeling.Jiangsu Electrical Engineering,2012,31(5):40-44)
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[15]Luo R,He Y,Liu J.Research on the unbalanced compensation of delta-connected cascaded h-bridge multilevel SVG[J].IEEE Trans Industrial Electronics,2018,65(11):8667-8676.
[2]郭宏图.SVG与SVC在煤矿供电系统应用比较[J].电子科技,2010,23(S1):10-12.(Guo Hongtu.SVC and SVG comparison of power supply system in coal mine.Electronic Science and Technology,2010,23(S1):10-12)
[3]王兆安,杨君,刘进军,等.谐波抑制和无功功率补偿[M].北京:机械工业出版社,2010.(Wang Zhaoan,Yang Jun,Liu Jinjun,et al.Harmonic suppression and reactive power compensation.Beijing:China Machine Press,2010)
[4]周潮,邢文洋,李宇龙.电力系统负荷预测方法综述[J].电源学报,2012(6):32-39.(Zhou Chao,Xing Wenyang,Li Yulong.Summarization on load forecasting method of electrical power system.Journal of Power Supply,2012(6):32-39)
[5]刘华东,张定华,邓建华,等.SVC在电弧炉治理中的应用研究[J].大功率变流技术,2009(5):51-56.(Liu Huadong,Zhang Dinghua,Deng Jianhua,et al.Application Research of SVC for electric arc furnace governance high power converter technology.High Power Converter Technology,2009(5):51-56)
[6]孙聪,王异凡,陈国柱,吴新科.基于Steinmetz原理与瞬时无功理论的SVC装置防过补偿控制策略[J].机电工程,2013,30(10):1246-1249,1272.(Sun Cong,Wang Yifan,Chen Guozhu,et al.Anti-overcompensation control strategy in SVC based on Steinmetz principle and instantaneous reactive power theory.Journal of Mechanical&Electrical Engineering,2013,30(10):1246-1249,1272)
[7]杜亚鹏,范兴明,张鑫,等.基于PSCAD的TCR+FC型SVC控制策略研究[J].电焊机,2012,42(9):25-29.(Du Yapeng,Fan Xingming,Zhang Xin,et al.Research on control strategy for TCR-FC type SVC based on PSCAD.Electric Welding Machine,2012,42(9):25-29)
[8]张俊敏,田微.基于瞬时无功功率理论谐波检测方法的研究[J].电力系统保护与控制,2008(18):33-36.(Zhang Junmin,Tian Wei.Study on harmonic detection methods based on instantaneous reactive power theory.Power System Protection and Control,2008(18):33-36)
[9]Li W,Zhao J,Chen W,et al.The 3-layer coordinated control of the hybrid operation of SVC and SVG[R].IET Generation,Transmission&Distribution,2016.
[10]许敏敏.级联H桥SVG无功补偿控制策略研究[D].太原:太原科技大学,2016.(Xu Minmin.Study on control strategy of cascade H-bridge SVG in reactive power compensation.Taiyuan:Taiyuan University of Science and Technology,2016)
[11]邹宁,方存洋,刘育鑫,等.PSCAD/EMTDC-MATLAB联合仿真技术在SVC控制系统仿真建模中的应用[J].江苏电机工程,2012,31(5):40-44.(Zou Ning,Fang Cunyang,Liu Yuxin,et al.Application of PSCAD/EMTDC-MATLAB co-simulation technology in SVC control system simulation modeling.Jiangsu Electrical Engineering,2012,31(5):40-44)
[12]Pathak A K,Sharma M P,Gupta M.Modeling and simulation of SVC for reactive power control in high penetration wind power system[C]//12th IEEE India International Conference INDICON 2015Electronics,Energy,Environment,Communications,Computer,Control(E3-C3).2016.
[13]Hu S G,Gao D Y,Wang S H,et al.Simulation study on three-phase three-wire system low voltage SVG in PSCAD[J].Advanced Materials Research,2014,1049/1050:703-707.
[14]Wu Yanan,Xu Liuwei,Fu Peng,et al.Testing of SVC compensation and filtering performance with Tokamak PF converter[J].Journal of Fusion Energy,2014,34(1):84-92.
[15]Luo R,He Y,Liu J.Research on the unbalanced compensation of delta-connected cascaded h-bridge multilevel SVG[J].IEEE Trans Industrial Electronics,2018,65(11):8667-8676.