分散式风电并网规划方法

为了研究考虑网损和电压因素的配电网最大接纳风电能力,提出一种基于考虑接入容量和功率因数的分散式风电选址定容策略.给出配电网接入分散式风电场后的网损率计算方法,将网损率作为衡量配电网网损运行特性的指标,利用权重系数求解总网损率最小的多目标优化函数.考虑接入容量和功率因数对网损的影响,建立规划模型,得到接入点的最大接入容量和功率因数,并根据电压稳定裕度分析分散式风电场并网后对配电网带载能力的影响.利用IEEE-33、69及37节点系统仿真算例证明了所提策略对配电网最大程度接纳风电、提高带载能力和减小网损的有效性.

Planning method for dispersed wind power grid-connection

In order to investigate the maximum wind power acceptable capacity of distribution network with the consideration of network loss and voltage factor, a locating and capacity-determining strategy of dispersed wind farm(DWF)based on both access capacity and power factor was proposed. A calculation method for the network loss rate after the access of distribution network into the DWF was given, and the network loss rate was taken as the index for measuring the operation characteristics of network loss of distribution network. In addition, a multi-objective optimization function for the minimum network loss was solved with the weight coefficient. With considering the influence of access capacity and power factor on the network loss, a planning model was established and the maximum access capacity and power factor of access point were obtained. According to the voltage stability margin, the effect of DWF after the grid connection on the loadability of distribution network was analyzed. The simulation examples of IEEE-33, 69 and 37 node systems can prove the effectiveness of proposed strategy in terms of maximum wind power acceptable capacity, loadability enhancement and network loss decrease.