Modular Control Method for Reactive Power Compensation in Distribution Network Area Based on Parallel k-means Clustering
Due to the influence of distribution line loss harmonics in the process of reactive power compensation in the distribu-tion network area,the current and voltage are unbalanced,and the reactive current and voltage cannot be suppressed.In order to achieve reactive power compensation in the distribution network area,a modular control method for reactive power compen-sation in the distribution network area is proposed in combination with the parallel k-means clustering algorithm.The control structure of stable reactive power compensation for modular multi-level converter is constructed,and the k-means clustering al-gorithm is used to calculate the line loss rate of distribution network,so as to avoid voltage imbalance caused by the increase of reactive power compensation harmonics,which is helpful to maintain the stability of reactive power compensation control.k-means clustering algorithm is used to classify and process multiple samples,and the central sample data are taken as the clus-ter center.Combined with the operation state of the distribution network,this paper calculates the current balance,screens out the optimal distribution state of intelligent current control switch,changes the phase of current input and output,controls the reactive compensation current value,and maintains the current balance in the distribution network.The positive and negative sequence component transformation matrix of voltage is constructed to control the target active and reactive voltage.By intro-ducing a non-closed loop control structure,the disturbance in the actual operation process is corrected in time,so that the volt-age fluctuates stably within the rated voltage regulation range,and the voltage balance in the distribution network is main-tained.The experimental results show that the reactive current and voltage after compensation by this method are 0,and the distribution network area is mainly composed of active current and voltage,which shows that this method can suppress reactive current instantaneously and achieve ideal compensation effect.
万方数据
维普
