Abstract A large number of harmonics are generated in the production of high-power electrolytic aluminum, which seriously affects the power quality of power system. In order to eliminate the harmonic generated in the process of aluminum electrolysis, a kind of converter with the function of harmonic self-elimination is proposed in this paper. On the basis of traditional 12-pulse rectifier, this converter adds a harmonic current reinjection loop to eliminate harmonics by controlling the amplitude and phase of the injected current. Firstly, the topology of high power rectifier is introduced, and the generation of harmonics is simulated. Then, the relationship between the level number of injected current and the effect of harmonic elimination is analyzed. Taking the 9-level current injected harmonic self-elimination rectifier as the research object, the working principle and control method of zero-crossing switch and the harmonic elimination and current of multi-level current injected rectifier are analyzed. Finally, the simulation results of harmonic elimination of 9-level current reinjection converter are given under the environment of Matlab/Simulink, and it is verified that the harmonic content of harmonic self- cancellation rectifier is lower than 4% of the national standard when operating at different power levels.
[1] 彭卉, 邹舒, 付永生, 等. 冲击负荷接入电网的电能质量分析与治理方案研究[J]. 电力系统保护与控制, 2014, 42(1): 54-61. [2] 周乐明, 罗安, 陈燕东, 等. 单相LCL型并网逆变器功率控制及有源阻尼优化方法[J]. 电工技术学报, 2016, 31(6): 144-154. [3] 胡文华, 宋平岗, George, 等. 新型双18脉波整流器的拓扑结构特性[J]. 高电压技术, 2010, 36(5): 1299-1304. [4] 朱屹, 杨世彦, 孟凡刚. 直流侧带PWM整流器的12脉波整流系统及其负载适应性[J]. 电工技术学报, 2012, 27(8): 85-92. [5] 殷晓东, 罗登, 李祖勇, 等. 一种双向隔离DC-DC变换器二次纹波电压抑制方法[J]. 电工技术学报, 2018, 33(6): 1356-1363. [6] 刘心旸, 王杰, 王昕, 等. 有源滤波器的模糊阈值变环宽滞环电流跟踪控制策略[J]. 电力系统保护与控制, 2011, 39(11): 116-123. [7] 宁志毫, 罗隆福, 李勇, 等. 混合型多重化工业整流系统数学模型及动态控制模式研究[J]. 电网技术, 2012, 36(10): 222-228. [8] 王晖, 常鲜戎, 郑焕坤. 基于改进瞬时对称分量法与三点算法的相量测量新算法[J]. 电力系统保护与控制, 2011, 39(19): 115-120. [9] Meng Fangang, Yang Shiyan, Yang Wei, et al.Comments and further results on “a new critical formula and mathematical model of double-tap interphase reactor in a six-phase tap-changer diode rectifier”[J]. IEEE Transactions on Industrial Electro- nics, 2010, 57(3): 950-953. [10] Yang Shiyan, Meng Fangang, Yang Wei.Optimum design of inter-phase reactor with double-tap-changer applied to multi-pulse diode rectifier[J]. IEEE Transa- ctions on Industrial Electronics, 2010, 57(9): 3022-3029. [11] Liu Y H, Arrillaga J, Watson N R.(2004) Multi-level voltage reinjection-a new concept in high power voltage source conversion[J]. IEE Proceedings, Generation, Transmission and Distribution, 2004, 151(3): 290-298. [12] Baird J F, Arrilaga J.Harmonic reduction in dc-ripple reinjection[J]. IEE Proceedings, Generation, Trans- mission and Distribution, 1980, 127(5): 294-303. [13] Das B P, Watson N R, Liu Y.(2011). Dc-ripple reinjection: a review[J]. International Journal of Emerging Electric Power Systems, 2011, 12(5): 14-33. [14] 冯思硕, 王金花, 杨欢, 等. 混合钳位式三电平逆变器新型调制策略研究[J]. 电工技术学报, 2016, 31(13): 46-54. [15] Perera L B, Liu Y, Watson N R, et al.Multi-level current reinjection in double-bridge self-commutated current source con- version[J]. IEEE Transactions on Power Delivery, 2005, 20(2): 984-991. [16] Arrillaga J, Liu Y, Watson, N R.Flexible power transmission: the HVDC options[M]. London: John Wiley & Sons, Ltd, 2007: 210-222.
2020, Vol. 21 
