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AN ACTIVE FRONT-END RECTIFIER FILTER DELAY COMPENSATION METHOD BASED ON MODEL PREDICTIVE CONTROL
AN ACTIVE FRONT-END RECTIFIER FILTER DELAY COMPENSATION METHOD BASED ON MODEL PREDICTIVE CONTROL
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机译：基于模型预测控制的主动端整流滤波延时补偿方法
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摘要
An active front-end rectifier filter delay compensation method based on model predictive control is disclosed. The method includes following steps: detecting a three-phase grid voltage and three-phase input current sampling value of an active front-end rectifier, and transforming both via Clarke transformation to acquire grid voltage sampling values eα and eβ, and input current sampling values ifα and ifβ under a two-phase stationary coordinate system; establishing an equivalent mathematical model of rectifier on the basis of voltage balancing equation (1) in an actual rectifier, and establishing an equivalent filter model on the basis of a transfer function corresponding to the actual filter, thus constituting a filter delay observer; and, compensating the difference value between the input current sampling values ifα and ifβ, and equivalent current sampling values iofα and iofβ into an input of the filter delay observer via a proportional controller. In comparison to the input current sampling values ifα and ifβ, the input current observed values ioα and ioβ of the rectifier are not impacted by a filter latency and are closer to the actual input current value of the rectifier such that the impact of the filter delay is compensated.
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