冗余电压数据干扰下的配网合环潮流计算方法改进研究

传统阻抗法在运算配网合环潮流时,受到冗余电压数据的干扰,存在计算结果精度不高,消耗时间较长的问题。因此提出基于前推回代的合环潮流计算方法,采用前推回代方法基于冗余电压干扰下的辐射状配网合环系统结构,基于节点迭代过程的运算结果,判断节点是否具备合环条件并对其进行调整和改进,当相邻两次迭代节点电压差模分量的最大值小于给定收敛值,说明迭代过程结束,获取节点电压值。采用三相潮流计算方法,获取配网合环中的网格参数,并对各节点电压进行初始化设置,对配网合环末端进行回推计算得到支路功率的分布情况,获取配网合环潮流计算值。实验结果说明,所提方法提高配网合环潮流计算精度,具有较高的收敛效率和运算效率。

Improvement of the Calculation Method of Distribution Loop Power Flow in the Distribution Network Under the Interference of Redundant Voltage Data

The traditional impedance method is often disturbed by redundant voltage data when calculating closed-loop power flow in distribution network, which results in low accuracy and long time consumption. To this end, this paper proposes the closed loop flow calculation method based on the back/forward sweep, and adopts the radial distribution system structure of the back/forward sweep method under the interference of redundant voltage and calculation results of the node-based iterative process, to determine whether a node has closed loop conditions, and carries on the appropriate adjustment and improvement on it. When the maximum value of two adjacent iterative node vol?tage differential mode components is less than the given value, the convergence indicates that the iterative process has ended, and the node voltage value can be obtained. The three-phase power flow calculation method is used to obtain the grid parameters in the distribution network closing loop, initialization setting is done for the voltage of each node, and the distribution of branch power at the end of the distribution network closing loop is calculated by regression, so as to obtain the calculation value of the distribution network closing loop power flow. The experimental results show that the proposed method improves the accuracy of closed-loop power flow calculation, and has high convergence efficiency and operation efficiency.