含风电场的电力系统潮流算法的改进

Modified Power Flow Algorithm in Electrical Power System Including Wind Farms

为了更好地计算含风电场的电力系统潮流,建立了异步风力发电机的稳态等值简化模型,并对原有电力系统潮流算法进行了改进。改进的算法在雅可比矩阵中引入了异步风力机滑差修正量,修正雅可比矩阵中对应风力发电机节点的元素,并运用MATALB编程实现含有风电场的电力系统潮流计算。将改进后的算法应用于接有风电场的4机11节点测试系统的潮流计算,结果和已有的两种典型潮流计算方法接近,表明改进后的潮流算法有效合理。

The paper introduces the simplified steady-state model of wind farms in order to calculator power flow including wind farm,and then improves power flow algorithm on the basis of regarding the reactive power output of each wind generator as the function of nodal voltage,which imports slip correction of asynchronous wind generator into Jacobi matrix by virtue of operational principle of asynchronous wind generator,to amend the corresponding node matrix elements in order to achieve considering the wind farm power flow calculation.The paper writes MATLAB programs to calculation power flow.In addition,the modified power flow algorithm is applied to calculate load flow of 4-generator 11-bus test system including wind power generation and the effectiveness and rationality of the proposed method are verified through comparing with two typical flow calculation methods.