摘要
近年来,风电场规模越来越大,如果对大型风电场的每台机组进行详细建模,会增加运算规模,耗费大量时间。对大型风电场进行等值建模可以有效减少模型复杂度,减少计算量。但在等值过程中选择合适的分群方法,确定合理的风电场等值模型参数非常重要。因此,针对风电场等值建模过程中分群指标唯一且有些状态变量难以得到的问题,提出了一种解决方法。该方法根据卸荷电路导通情况进行首次分群,然后针对卸荷电路未导通的机组,根据稳态电压和暂态电压跌落值进行二次分群。分群后计算等值模型的相关参数,然后计算不同故障类型、不同功率因数、不同短路比、不同残压幅值下等值模型和详细模型的误差,通过和单机等值方法的对比,得出利用所提方法得到的等值模型误差大大减小,验证了该等值方法的有效性。
In recent years,the scale of wind farms has become larger and larger,and if each unit of a large wind farm is modeled in detail,it will increase the calculation scale and consume a lot of time.The equivalent modeling of large wind farms can effectively reduce the complexity of the model and reduce the amount of calculation.However,it is very important to select the appropriate clustering method and determine the reasonable parameters of the equivalence model of wind farm.Therefore,aiming at the problem that the clustering index is unique and some state variables are difficult to obtain in the wind farm equivalence process,a method is proposed.Firstly,the first grouping is performed based on the unloading circuit conduction,and then for the units that the unloading circuit is not conducting,the second clustering is performed according to the steady-state voltage and the transient voltage drop value.After grouping,the relevant parameters of the equivalent model are calculated,and then the error of the equivalent model and the detailed model under different fault types,different power factors,different short-circuit ratios,and different residual voltage amplitudes are calculated.Through comparison with the stand-alone equivalent method,it is concluded that the error of the equivalent model obtained by the proposed method is greatly reduced,which verifies the effectiveness of the equivalent method.
作者
黄卓
高慧敏
钟毅
HUANG Zhuo;GAO Huimin;ZHONG Yi(School of Automation,Hangzhou Dianzi University,Hangzhou 310018;Information Engineering College,Hangzhou Dianzi University,Hangzhou 311305)
出处
《电气工程学报》
CSCD
北大核心
2024年第4期316-325,共10页
Journal of Electrical Engineering
基金
浙江省自然科学基金(LQY19E070001)
杭州电子科技大学信息工程学院培育(KYP012201)资助项目。
关键词
风电场等值建模
卸荷电路
二次分群
参数等值
Equivalent modeling of wind farms
chopper circuit
secondary clustering
parameter equivalence
