COAL ENGINEERING ›› 2016, Vol. 48 ›› Issue (11): 100-102.doi: 10.11799/ce201611029

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Optimal control of reference compensating current for active power filter

  

  • Received:2016-07-18 Revised:2016-08-17 Online:2016-11-10 Published:2016-12-16

Abstract: In the power quality management of coal mine power grid, Active power filter (APF) and other switching compensation devices have been widely concerned. The special requirements of power quality management for coal mine power grid, an optimal control of APF reference compensating current under non sinusoidal supply voltage is proposed. By analyzing the constrained conditions, the objective function, equality constrain and inequality constrain are obtained that establish mathematical model of Lagrange multiplier method. In order to obtaining the desired source current and achieving the maximum power factor that calculate the optimal conductance factor for the nth order harmonic using the mathematical calculation. This control algorithm does not need complex iterative calculation, the calculation speed is simple and fast. Matlab simulation validate the feasibility of the proposed algorithm.

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