卷烟车间有源电力滤波器模型预测控制策略
A model predictive control strategy for active power filter in cigarette workshop
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摘要: 针对现代卷烟车间三相四线制配电系统的零序电流导致直流侧中点电压波动，从而影响有源电力滤波器（Active Power Filter，APF）谐波治理效果的问题，提出一种基于中点钳位（Neutral Point Clamped，NPC）三电平APF的重构空间电压矢量模型预测控制策略.构建APF谐波治理层次分析构架，设计中点电压均衡、零序电流补偿及空间电压矢量利用率3项性能指标，评估各类电压矢量指标性能.比较量化重构的6种空间电压矢量组合，优选层次分析评价得分最高的组合进行模型预测谐波治理.仿真与实验结果表明，对比常规控制策略，本文所提策略能够有效治理谐波，平衡APF直流侧中点电压.Abstract: In the three-phase four-wire power distribution system of modern cigarette workshops, the zerosequence current causes the midpoint voltage fluctuation on the DC side, which affects the harmonic control effect of active power filter (APF). To solve this problem, a model predictive reconstructed space voltage vector control strategy based on neutral point clamped (NPC) three-level APF was proposed. The APF harmonic control hierarchy analysis framework was constructed, the three performance indicators of midpoint voltage balance, zero sequence current compensation and space voltage vector utilization were designed, and the performance of various voltage vector indicators was evaluated. The 6 types of reconstructed space voltage vector combinations were quantitatively compared, and the combination with the highest evaluation score in the analytic hierarchy process was selected for model predictive harmonic control. Simulation and experimental results showed that compared with conventional control strategies, the proposed strategy could effectively control harmonics and balance the midpoint voltage of the DC side of the APF.
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