电力系统风电场节点模型研究及潮流计算

Study of Node Model and Power Flow Calculation in Wind Farm of Power System

为解决风电场节点模型不够完善的问题,在传统RX模型的基础上提出了改进RX模型。将异步风力发电机滑差修正量引入到雅克比矩阵中,使潮流计算的迭代过程仍然保持牛顿-拉夫逊法所具有的平方收敛性;同时,考虑了节点电压对异步风力发电机吸收无功功率的影响。将所提出的改进RX模型应用于IEEE14节点的测试系统潮流计算中,对潮流计算结果进行对比分析,证明了改进RX模型的计算结果精确,可缩短计算时间。

In order to handle the imperfection of node model in wind farm,the improved RX model is presented on the basis of conventional RX model.The slip correction of asynchronous wind generators is introduced in Jacobian matrix so that iterative procedure of power flow calculation can retain quadratic convergence of Newton-Raphson method.Meanwhile,impact of node voltage on wind generator＇s absorption of reactive power is taken into account.The RX model is applied in power flow calculation of test system of IEEE 14 node,and the results of power flow calculation are compared.It is proved that the calculation results of RX model are precise and the RX model can reduce calculation time.