一种基于节点聚合的区域联络线潮流调整方法

A method for power flow adjustment of tie line based on data splicing of internal and external networks

在线安全稳定分析数据由本地状态估计数据和上级下发的其他调度机构数据拼接构成,由于两者时间不同步造成区域联络线功率出现偏差。文中提出了一种内外网数据拼接的区域联络线潮流调整方法,在将联络线聚合成联络通道以及将对联络通道灵敏度较大的若干节点聚合的基础上,通过求解聚合节点调整量和联络通道潮流偏差量的线性方程组获得调整量,避免采用优化方法时计算速度慢和部分节点调整量过大的问题;当方程组病态时,通过求解极小范数最小二乘解避免线性方程组无解的问题。该方法可以满足在线安全稳定分析计算速度和准确性要求,且某实际电网的算例验证了该方法的有效性。

The online security and stability analysis data is composed of local state estimation data and data of other dispatching agencies issued by the superior.The power deviation of the regional tie line is caused by the synchronization of the time between the two.In this paper,a method of regional tie-line power flow adjustment is proposed for data splicing of internal and external networks.On the basis of aggregation of interconnection lines into contact channels and several nodes with greater sensitivity to the aggregate nodes,the adjustment quantity is obtained by solving the linear equations of aggregate node adjustment quantity and connection channel power flow deviation quantity.When the system is ill-conditioned,the problem of no solution of linear system is avoided by solving minimum norm least squares solution.This method can meet the requirements of speed and accuracy of online safety and stability analysis.The validity of the method is verified by the case of actual power system.