电力系统自动化2016，Vol.40Issue(10)：24-30,37,8.DOI:10.7500/AEPS20150825003
基于低电压穿越去磁控制的风电场内部故障等值建模方法
Equivalent Modeling Method for Wind Farm Inner Fault Based on Demagnetizing Control of Low Voltage Ride Through
摘要
Abstract
The regional and multiple wind farm cascading trip-off induced by the wind farm inner fault will cause serious impacts on the power grid.Based on the demagnetizing control of low voltage ride through(LVRT),wind farm equivalent modeling is carried out according to the generator groups divided by the switching criterion of Crowbar circuit after the fault.First,by taking the influence of rotor side converter into consideration,and with the rotor current not ignored,the stator flux during the period between the moments the fault occurs and Crowbar circuit switches in is calculated through the state equation.The demagnetizing rotor current is then obtained by combining with the switching criterion of demagnetizing control strategy. Thereby the generators of the wind farm are divided by estimating whether the Crowbar is to act or not.After analyzing the characteristics of wind farm inner fault,the original collector network need not be changed,but the access points of equivalent generators are determined by using nonlinear programming.Finally,example and simulation show that the method proposed can accurately reflect the characteristics of the wind farm before and after the fault.关键词
去磁控制/定子磁链/状态方程/内部故障/集电网络/非线性规划Key words
demagnetizing control/stator flux/state equation/inner fault/collector network/nonlinear programming引用本文复制引用
陆飞,刘其辉,赵亚男,宋诗雨..基于低电压穿越去磁控制的风电场内部故障等值建模方法[J].电力系统自动化,2016,40(10):24-30,37,8.基金项目
国家电网公司科技项目(SGSDDK00KJJS1500155)。 （SGSDDK00KJJS1500155）
