知识与财富的链接
风电机组并网运行时将使其接入电网的节点电压发生波动,进而引起闪变问题.为了估计闪变的严重程度,应当对全电网的节点电压波动进行测量或仿真.文章在分析风电机组输出电流特性的基础上,提出了简单的用于计算全电网电压波动的风电场电流源等效方法.仿真计算结果表明,该方法与其他电流源等效法的计算结果一致,可用于计算包含风电场的电网的节点电压波动.
Voltage fluctuation will occur when wind turbines are connected into power network and put into operation, and then the flicker may be led to. Therefore, to evaluate the flicker severity it is necessary to measure or simulate the voltage fluctuation of the whole power network. On the basis of analyzing the output current characteristics of wind turbines, a simple current source substituting method for wind farm is presented to calculate the voltage fluctuation in the whole network. Simulation results show that the calculation results by the presented method can coincide with those by other current source equivalent methods, so the presented method can be applied to the calculation of voltage fluctuation at the nodes of the grid where the wind farm is interconnected.
