等值损耗功率法在风电场等值计算中的应用

Application of Equivalent Power Loss in Equivalence Calculation of Wind Farms

大规模风电场接入电网,进行潮流计算考虑风电场内部的集电系统与否,对计算结果会带来较大的误差,需建立考虑集电系统的风电场等值模型。本文提出了等值损耗功率法对风电场进行等值,兼顾了风电场机组众多、风能波动较大的特点,以风电场接入乌鲁木齐电网为例进行潮流计算,对风电场等值前后的潮流计算结果进行比较,结果相近,误差小,从而验证了等值损耗功率法的有效性、合理性;为进一步研究含风电场的电力系统安全稳定运行提供参考。

During power flow calculation of power grid connected to large-scale wind farm,whether the collector system of wind farm is taken into account or not may bring about biggish error in calculation results,so it is necessary to build such an equivalent wind farm model in which its collector system should be taken into account.Utilizing equivalent power loss method to the equivalence of wind farm considering the features that there are lots of wind power generation sets in wind farm and the wind energy fluctuates greatly,the power flow of wind farm-connected Urumqi power system is calculated.Comparing the power flow calculation results before and after the equivalent of wind farm model considering collector system,it is found that the error is smaller,thus the feasibility are rationality of adopting equivalent power loss method are validated.The reference is given for farther studying safety and stability operation of electric power system including wind field.