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Analysis of energy conservation of internal feedback motor in pumping stations |
XU Yingying, MO Yueping, WU Song, WU Lei, ZHANG Yunyuan |
School of Hydraulic, Energy and Power Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China |
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Abstract For internal feedback motors, a control system is designed, in which a chopper circuit is developed for speed regulation based on the rectifier-inverter principle and corresponding formulas. The voltage control instructions in dq rotating reference frame are generated by changing the voltage in 3-phase static reference into 2-phase rotating reference with PARK transformation combined with the forward feedback decoupling control strategy. A unity power factor operation can be achieved by setting the current of the q axis(reactive current)to be 0. The SVPWM controller generates a driving signal according to the phase and amplitude of voltage and current stator as well as sampling control voltage. By controlling the IGBT on or off, the excess energy is delivered to the stator. The control system is simulated in MATLAB and the results show that with the decrease of duty ratio, the speed and active power reduce, and the reactive power remains zero, suggesting the internal feedback motor is subject to a higher power factor during speed regulating. Finally, the electric bill of a pumping station in Jiangsu Province is calculated when the internal feedback motors are used to drive the pumps for a year. It is shown that a ¥413 100 budget can be saved after the motors are used, causing significant economic benefits.
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Received: 14 January 2015
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[1]厉明祥. 南水北调大型泵结构设计研究[J]. 排灌机械, 2003,21(3):1-5. LI Mingxiang. The large pump structure design research for South-to-North water diversion[J]. Drainage and irrigation machinery, 2003,21(3):1-5.(in Chinese)[2]吕树清. 交流励磁变速抽水蓄能机组的应用探讨[J].南昌水专学报,2000,19(4):29-32. LYU Shuqing. Application of variable-speed pumped storage manchine in AC excitatoin[J]. Journal of Nanchang College of Water Conservancy and Hydroelectric Power, 2000,19(4):29-32.(in Chinese)[3]葛强,陈松山,王林锁. 大型泵站主电动机选型优化的研究[J]. 水泵技术, 2002(5):39-42. GE Qiang, CHEN Songshan, WANG Linsuo. The optimal selection research of main motor for large pumping station[J]. Pump technology, 2002(5):39-42.(in Chinese)[4]王兵树,张晓东,郭晓原. 内反馈串级调速电机的近似数学建模与simulink仿真[J]. 系统仿真学报, 2010,22(2):537-541. WANG Bingshu, ZHANG Xiaodong, GUO Xiaoyuan. Approximate mathematical modeling and simulation of cascade speed regulation of inner-feedback motor[J]. Journal of system simulation, 2010,22(2):537-541.(in Chinese)[5]张海峰,范毅. 基于DSP控制斩波内反馈串级调速系统研究[J]. 杭州电子科技大学学报, 2010,30(2):16-19. ZHANG Haifeng, FAN Yi. DSP based research of speed regulation system of internal feedback cascade motor with chopper[J]. Journal of Hangzhou Dianzi University, 2010,30(2):16-19.(in Chinese)[6]洪长艳,黄秀波. 内反馈串级调速电机的原理及设计[J]. 防爆电机, 2003(2):11-13,20. HONG Changyan, HUANG Xiubo. Principle and design of internal-feedback cascade speed-adjusting motor[J]. Explosion-proof electric machine, 2003(2):11-13,20.(in Chinese)[7]刘志奇,黄魁,张晓东. 内反馈串级调速电机技术特点及应用分析[J]. 仪器仪表与分析监测, 2010(1):9-11. LIU Zhiqi, HUANG Kui, ZHANG Xiaodong. The application analysis and technology features of cascade speed control system of inner feedback motor[J]. Instrumentation analysis monitoring, 2010(1):9-11.(in Chinese)[8]VALAN RAJKUMAR M, MANOHARAN P S. FPGA based multilevel cascaded inverters with SVPWM algorithm for photovoltaic system[J]. Solar energy, 2013,87:229-245.[9]SHEHADA A, BEIG A R. An improved CSI fed induction motor drive[J]. International journal of electrical power & energy systems, 2013,46:26-35.[10]CHARUMIT C, KINNARES V. Discontinuous SVPWM techniques of three-leg VSI-fed balanced two-phase loads for reduced switching losses and current ripple[J]. IEEE transactions on power electronics, 2015,30(4):2191-2204.[11]GABALLAH M M. Design and implementation of space vector PWM inverter based on a low cost microcontroller[J]. Arabian journal for science and engineering, 2013,38(11):3059-3070.[12]VASQUEZ J C, MASTROMAURO R A, GUERRERO J M, et al. Voltage support provided by a droop-controlled multifunctional inverter[J]. IEEE transactions on industrial electronics, 2009,56(11):4510-4519.[13]ZHAO Di, HARI V S S P K, NARAYANAN G, et al. Space-vector-based hybrid pulsewidth modulation techniques for reduced harmonic distortion and switching loss[J]. IEEE transactions on power electronics, 2010,25(3):760-774.[14]DAS S, NARAYANAN G, PANDEY M. Space-vector-based hybrid pulsewidth modulation techniques for a three-level inverter[J]. IEEE transactions on power electronics, 2014,29(9):4580-4591.[15]XIAO Xiangning, JIANG Xu, LIU Hao, et al. Study on the SVPWM algorithm of N-level inverter in the context of non-orthogonal coordinates[J]. Frontiers of electrical and electronic engineering in China, 2006,1(2):199-204.[16]BABAEI E, SABAHI M. Development of pulse width modulation technique for controlling inverters under balanced and unbalanced operations[J]. Arabian journal for science and engineering, 2014,39(4):2941-2951.[17]YAO Wei, CHEN Min, MATAS J, et al. Design and analysis of the droop control method for parallel inverters considering the impact of the complex impedance on the power sharing[J]. IEEE transactions on industrial electronics, 2011,58(2):576-588.[18]谈龙成,李耀华,刘丛伟,等. 三相电流型PWM整流器的功率因数控制方法[J]. 电工技术学报, 2010,25(2):86-93. TAN Longcheng, LI Yaohua, LIU Congwei, et al. Power factor control method of three phase current source PWM rectifier[J]. Transactions of China electrotechnical society, 2010,25(2):86-93.(in Chinese)[19]吴云亚,阚加荣,谢少军. 基于双d-q坐标系的并网逆变器控制策略[J]. 电工技术学报, 2011,26(8):106-112. WU Yunya, KAN Jiarong, XIE Shaojun. Control strategy for grid-connected inverter based on double d-q coordinates[J]. Transactions of China electrotechnical society, 2011,26(8):106-112.(in Chinese)[20]姚骏,廖勇,李辉,等. 直驱永磁同步风力发电机单位功率因数控制[J]. 电机与控制学报, 2010,14(6):13-20. YAO Jun, LIAO Yong, LI Hui, et al. Unity power factor control of a direct-driven permanent magnet synchronous wind-power generator[J]. Electric machines and control, 2010,14(6):13-20.(in Chinese)[21]刘文良,张国政. 永磁同步电机单位功率因数控制[J]. 微电机,2012,45(2):63-67. LIU Wenliang, ZHANG Guozheng. Unity power factor control of permanent magnet synchronous motor[J]. Micromotors, 2012,45(2):63-67.(in Chinese) |
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